JP5863028B2 - Roll forming equipment - Google Patents

Description

  The present invention relates to a roll forming apparatus.

  A polymer electrolyte fuel cell has a plurality of single cells formed by laminating separators having a flow path for hydrogen, a fuel electrode, a solid polymer film, an air electrode, and a separator having a flow path for air. It is composed of stacked stacks. The separator is required to have electrical conductivity, mechanical strength, and the like. For example, a conductive plate material such as metal is used as a material, and an uneven shape is formed. The uneven shape is used as a hydrogen flow path or an air flow path. It is a flow path.

  A roll forming apparatus for forming a concavo-convex shape on such a metal plate or the like is known from Patent Document 1. In the mold roll of Patent Document 1, the upper roll and the lower roll are respectively provided with concave and convex grooves over the entire circumference, and the lower roll's protruding shape or the uneven shape is fitted between the upper roll's protruding shape or the uneven shape. I have to. And in patent document 1, an elastic body, such as an air spring and rubber | gum, is provided in the thrust direction of the bearing part of the roll part of one side or both sides of an upper roll or a lower roll, and both rolls are positioned. Thus, the centers of the concave and convex portions of both rolls are made to coincide with each other so that the rolls do not shift.

  In Patent Document 2, a roll forming apparatus is used as an apparatus for manufacturing a stretched mesh sheet. In Patent Document 2, each of an upper roll and a lower roll is configured by overlapping a plurality of disk-shaped cutters at a predetermined interval. Projections are arranged at a predetermined pitch on the peripheral edge of the disk-shaped cutter.

  In Patent Document 3, although it is not a roll forming device, a rack tooth mold (upper mold) is disposed on the upper surface of the workpiece and the lower surface of the workpiece with respect to a U-shaped or U-shaped workpiece. Discloses a technique for forming a hollow rack shaft by placing a back side uneven mold (lower mold) in a state where a work is sandwiched between both molds and pressing with both molds in this state. Yes. The rack tooth mold and the back side uneven mold are each composed of a plurality of segments divided into respective tooth units.

JP 2006-75900 A Japanese Patent No. 2568285 Japanese Patent No. 3832186

  By the way, in the roll forming apparatus, when the roll is configured by stacking disk cutters (hereinafter referred to as cutting blades) as in Patent Document 2, the thickness tolerance of the cutting blades increases as the number of stacked cutting blades increases. As a result of being stacked, it becomes difficult to manage each clearance (also referred to as shear clearance) between the blade portions of the upper and lower cutting blades. In this case, if the processing accuracy of the cutting blade is increased so as to reduce the thickness tolerance of the cutting blade, there is a problem that the cutting blade cost becomes high.

There are the following problems when the clearance is not properly managed.
FIG. 20 is a comparative view of the total length of the upper roll 100 and the lower roll 200. In the figure, the upper roll 100 is laminated with a plurality of upper cutting edges 110, and the lower roll 200 is laminated with a plurality of lower cutting edges 210. As shown in the figure, when the thickness of the upper cutting edge 110 of the upper roll 100 is x and the thickness of the lower cutting edge 210 of the lower roll 200 is x + δ, the total length L1 of the upper roll 100 and the total length L2 of the lower roll 200 are Is as follows.

L1 = x × n
L2 = (x + δ) × n
It becomes. Note that n is the number of upper cutting edges.

  For this reason, in the length of the roll length of the upper roll 100 and the lower roll 200, the difference of nδ occurs. As a result, depending on the difference in nδ, the clearance between the upper and lower cutting edges may be excessive, the clearance may be excessive, or the clearance may be lost.

  Here, when the clearance between the blade portions of the upper and lower cutting blades is excessive, there is a problem that burrs are generated in the product manufactured by the roll forming apparatus. When the clearance between the blade portions of the upper and lower cutting blades is too small, the roll forming apparatus has a problem that the mold life is reduced due to wear. In addition, when there is no clearance between the upper and lower cutting edges, there is a problem in that the upper cutting edge 110 and the lower cutting edge 210 interfere with each other to cause die breakage. In FIG. 20, although not shown in the drawings, edge portions of the upper cutting edge 110 and the lower cutting edge 210 are provided.

  In addition, Patent Document 1 solves the displacement of the upper and lower rolls itself by disposing an elastic body such as an air spring or rubber in the thrust direction of the bearing portion of the roll. No means for improving the above is disclosed.

  In Patent Document 3, a die material composed of a plurality of segment materials having a thickness equal to the pitch of rack teeth is assembled in the same manner as a rack tooth molding die, and is immersed in an oil-based electric discharge machining liquid. In this state, the shape of the rack teeth to be molded, which are complementary to each other, is applied to each segment material by wire-cut electric discharge machining, thereby improving the accuracy of the entire rack tooth mold (upper mold, lower mold). Improvements have been made. However, it does not mention the problem of tolerance caused by stacking the segments.

  It is an object of the present invention to easily manage the overall length of a pair of rolls configured by stacking a plurality of cutting blades and the clearance between the cutting blades of each roll, and appropriately maintain the clearance. It is providing the roll forming apparatus which can do.

In order to solve the above problems, the invention of claim 1 is characterized in that a first roll and a second roll in which a plurality of cutting blades are stacked, a first rotating shaft supported by a pair of first bearings, and a pair of Roll forming in which a workpiece is roll-formed by rotating and supporting both rolls by rotation of the first rotating shaft and the second rotating shaft, fixedly supported and opposed to the second rotating shaft supported by the second bearing. In the apparatus, each of the first roll and the second roll is made of a material different from a member different from the cutting blade or a material different from the cutting blade with respect to the plurality of cutting blades stacked on the first roll and the second roll, respectively. A first clearance management unit and a second clearance management unit that are formed and manage the shear clearance are attached, and the first clearance management unit and the second clearance management unit respectively stack the plurality of cutting blades for each group. It consists of a plurality of management members that respectively manage the thicknesses of the cutting blades for each group, or is constituted by a single management member that divides and manages the plurality of cutting blades into a plurality of stacked cutting blade groups. And the management member of the first clearance management unit is a first retainer that is fixedly penetrated to the first rotation shaft, and the management member of the second clearance management unit is connected to the second rotation shaft. A rib that restricts movement of the cutting blade in the axial length direction is provided on the outer peripheral surface of the first retainer and the second retainer, and a cutting blade is provided on the outer periphery of the rib. there are attached, or, the first retainer and the second retainer is a plurality, have an outer diameter retainer adjacent to each other are different, that the through-fixing of the retainer adjacent to each other are eccentric And mutual Any one of the stepped portions have different shapes of the retainer is formed to fit Ri has been summarized as roll forming apparatus characterized by being selected to regulate the movement in the axial direction of the cutting edge.

According to a second aspect of the present invention, in the first aspect, the first clearance management portion, which is a member different from the cutting blade, is attached to each cutting blade of the first rotating shaft, and is interposed between the first rotating shaft and the cutting blade. A plurality of first shims provided, and a second clearance management unit, which is a member different from the cutting blade, is attached to each cutting blade of the second rotating shaft, and is between the second rotating shaft and the cutting blade. A plurality of second shims provided to be interposed, wherein the shear clearance is managed by the thickness of the first shim and the second shim.

The invention of claim 3 is characterized in that, in claim 1, a filler is interposed between the cutting edges, and the filler contains solid particles.
A fourth aspect of the present invention is characterized in that, in the first aspect, the first clearance management section and the second clearance management section are thin film layers formed on the side surfaces of the cutting edge by a film treatment.

The invention of claim 5 is characterized in that, in claim 1, the first clearance management part and the second clearance management part different from the cutting edge are elastic bodies arranged between the cutting edges.

  According to the first aspect of the present invention, it is possible to easily manage the total length of a pair of rolls configured by stacking a plurality of cutting blades and the shear clearance (that is, clearance) between the blade portions of the cutting blades of each roll. And the shear clearance can be properly maintained.

Further, according to the present invention, it allows to maintain the stacking direction of the thickness of the cutting edge of Gungoto as pruning sectional clearance does not become too small or too large. In other words, the management of the total length of the roll only needs to be performed by managing a group of cutting blades that can be accommodated in a smaller number of management members than the number of cutting blades. In addition, the shear clearance may be managed for each cutting blade group. For this reason, management of the shear clearance between the full length of a pair of rolls and the blade part of the cutting blade of each roll can be performed easily, and the said shear clearance can be hold | maintained appropriately.

According to the invention of claim 2 , the first shim and the second roll can be manufactured at low cost by the first shim attached to each cutting edge of the first roll and the second shim attached to each cutting edge of the second roll. The thickness in the laminating direction can be easily managed so that the shear clearance of the roll is not too small or too large, and the shear clearance can be properly maintained.

According to the invention of claim 3 , the thickness of the cutting blades in the stacking direction can be managed by compressing after stacking of the cutting blades by interposing the filler containing solid particles between the cutting blades. , The shear clearance can be appropriately maintained.

According to the invention of claim 4 , the thickness in the stacking direction can be managed by forming the first clearance management part and the second clearance management part by performing a film treatment on the side surface of the cutting edge, and shearing Clearance can be maintained appropriately.

According to the invention of claim 5 , by interposing an elastic body between the cutting edges, the thickness in the stacking direction can be managed, and the shear clearance can be appropriately maintained.

1 is a schematic view of a roll forming apparatus according to a first embodiment that embodies the present invention. The longitudinal cross-sectional view of the 1st roll (2nd roll) of 1st Embodiment. Explanatory drawing of shaping | molding of the board | plate material of the roll forming apparatus of 1st Embodiment. (A) is a schematic sectional drawing of the roll forming apparatus of 1st Embodiment, (b) is explanatory drawing of the shear clearance of the roll forming apparatus of 1st Embodiment. (A)-(c) is a longitudinal cross-sectional view of the 1st roll (2nd roll) of the modification of 1st Embodiment. (A)-(d) is a cross-sectional view of the 1st roll (2nd roll) of the modification of 1st Embodiment. Schematic of the roll forming apparatus of Reference Example 1 . (A) is a fragmentary enlarged view of Reference Example 1, (b) is a fragmentary cross-sectional view of Reference Example 1. (A) is an exploded longitudinal sectional view of the first roll of Reference Example 2 (second roll), longitudinal sectional view of (b) and (c) a first roll of a modification of Reference Example 2 (second roll). (A)-(d) is a cross-sectional view of the 1st roll (2nd roll) of the modification of the reference example 2. FIG. The longitudinal cross-sectional view of the 1st roll (2nd roll) of the reference example 3. FIG. (A) is a cross-sectional view of the 1st roll (2nd roll) of the reference example 3 , (b) is a perspective view of a key. (A), (b) is a cross-sectional view of the first roll of a modification of Reference Example 3 (second roll). (A) is a side view of the cutting edge of the second embodiment, (b) vertical cross-sectional view of the cutting edge, longitudinal sectional view of (c) the first roll of the second embodiment (second roll). (A) is a side view of the cutting blade of the modification of 2nd Embodiment, (b) is a longitudinal cross-sectional view of a cutting blade similarly. The longitudinal cross-sectional view of the 1st roll (2nd roll) of 3rd Embodiment. (A), (b) is principal part explanatory drawing of the roll of 3rd Embodiment. (A) is a front view of the cutting blade of 4th Embodiment, (b) is a side view of a cutting blade similarly, (c) is a front view of a 1st roll (2nd roll). (A) is a front view of the cutting blade of 5th Embodiment, (b) is a side view of a cutting blade similarly, (c) is a front view of a 1st roll (2nd roll). Explanatory drawing of the conventional roll.

(First embodiment: support of claim 1 )
A roll forming apparatus according to a first embodiment embodying the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the roll forming apparatus is rotatably supported by a base 10, a pair of side walls 12 and 13 erected on the base 10, and a pair of bearings 14 and 15 with respect to the side walls 12 and 13. And a pair of first rotating shaft 16 and second rotating shaft 18 arranged in parallel with each other, and a first roll 20 fixed to the first rotating shaft 16 and a second roll 20 so as to face the first roll 20. A second roll 40 fixed to the rotary shaft 18 is provided. The bearing 14 corresponds to a first bearing, and the bearing 15 corresponds to a second bearing.

The gears 16 a and 18 a meshing with each other are fixed to one end of the first rotating shaft 16 and the second rotating shaft 18, and a sprocket 18 b is fixed to one end of the second rotating shaft 18.
The sprocket 18b is rotationally driven by an electric motor (not shown) through an endless chain (not shown) wound around the sprocket 18b. Due to the rotation of the sprocket 18b and the gears 16a and 18a, the first rotating shaft 16 rotates synchronously with the second rotating shaft 18 at the same rotational speed.

  Since the first roll 20 and the second roll 40 have the same configuration, the first roll 20 will be described, and the configuration of the second roll 40 and its peripheral members will be attached to each configuration of the first roll 20 and its peripheral members. The number obtained by adding “100” to the number obtained is added.

  As shown in FIG. 2, the first roll 20 has a plurality of cutting blade groups 23 formed by laminating a predetermined number of cutting blades 22 attached to the first rotating shaft 16 via retainers 21. The cutting edge 22 is made of a hard metal, such as alloy tool steel (SKD), high-speed tool steel (SKH), or cemented carbide, and has a substantially ring shape. In the present embodiment, the number of cutting blade groups 23 is not limited as long as it is two or more, which is three.

  Each retainer 21 is formed of a cylindrical metal, and its center is penetrated so as to be coaxial with the first rotating shaft 16 and is non-rotatably fixed by a key 24, as shown in FIG. Are placed in close proximity to each other. The length of the retainer 21 in the axial direction is formed so as to be within a predetermined tolerance range. The axial length direction refers to the axial length direction of the first rotating shaft 16 or the second rotating shaft 18. Both rotating shafts are arranged in parallel as described above.

  As shown in FIG. 1, a pair of collars 29 that are in contact with the ends of a pair of retainers 21 positioned proximal to the bearing 14 are fixed to the first rotating shaft 16. The collar 29 is made of metal and has a cylindrical shape. The collar 29 penetrates the first rotating shaft 16 and is fixed by screws or the like (not shown). The collar 29 positions the retainer 21 with respect to the first rotating shaft 16. In FIG. 2, a part of the collar 29 is shown by a two-dot chain line.

  Further, the retainer 121 of the second roll 40 is positioned by the collar 129. The positioning is based on the premise that a shear clearance L (described later) for each of the opposing blade groups 23 and 123 between the first roll 20 and the second roll 40 is within an appropriate range. The positioning of the retainer with respect to the rotating shaft is not limited to the above method, and may be performed by a known method performed when the member is firmly attached to the shaft.

  As shown in FIG. 4A, the retainer 21 is fitted with the cutting blade 22 constituting the cutting blade group 23 and is non-rotatably connected by a key 25, and is movable in the axial length direction. It has become. At one end in the axial length direction of the retainer 21, a circular rib 30 having an outer diameter larger than that of the peripheral portion where the majority of the cutting blades 22 are removed is formed. The thickness of the rib 30 (the length in the axial direction) is the same as the thickness of one cutting blade 22 in this embodiment, but the thickness of the rib 30 is not limited to one cutting blade 22. A plurality of thicknesses may be used. The rib 30 can restrict the movement of the cutting blade 22 of another adjacent retainer 21. Further, the cutting blade 22 is attached to the outer periphery of the rib 30 through the key 25 so as not to rotate, and is movable in the axial direction. Further, in the cutting blades 22 attached to the retainers 21 of the first roll 20, the movement of the cutting edge 22 closest to each bearing 14 to the bearing 14 on the closest position is regulated by each collar 29. .

The collars 29 and 129 and the ribs 30 and 130 correspond to restriction means (regulation members) for restricting the movement of the cutting blade in the axial length direction.
In each retainer 21, the number of cutting blades 22 of the cutting blade group 23 is set to be within the axial length of the retainer 21. Specifically, the total thickness value of the cutting blades 22 including the maximum total thickness tolerance of the cutting blades 22 in the cutting blade group 23 is equal to or slightly smaller than the axial length of the retainer 21. The cutting blade 22 is selected and assembled. The maximum total value of the thickness tolerances means that the cutting blades 22 constituting the cutting blade group 23 each have a thickness tolerance α as ±, but the thickness tolerance α of the cutting blades 22 constituting the cutting blade group 23 is temporarily When all are positive values, it is the value when all these values are summed.

The axial lengths of the retainers 21 may be the same as each other or may be different from each other. In this embodiment, the axial length of each retainer 21 is the same.
In addition, when the axial length of each retainer 21 is not mutually the same, each retainer 121 of the second roll 40 may have the axial length matched to the opposing retainer 21. It is preferable to adjust the shear clearance L between the cutting edge 22 and the cutting edge 122 in the group 23 within an appropriate range because adjustment is easy.

  As shown in FIG. 4A, a plurality of blade portions 26 each having a protruding portion are formed on the outer periphery of the cutting blade 22 at a predetermined pitch. A recess 27 is formed between the blade portions 26. As shown in FIG. 4A, the cutting blades 22 adjacent in the axial direction are arranged such that the blade portions 26 are shifted from each other by a half of the predetermined pitch.

  Further, as shown in FIG. 4A, when the metal plate (work) is press-formed (roll-formed), the blade portion 26 of the cutting blade 22 of the first roll 20 is the cutting blade 122 of the second roll 40. It is arrange | positioned so that it may enter into the recessed part 127.

  Further, as shown in FIGS. 4A and 4B, the cutting edge 22 of the first roll 20 and the cutting edge 122 of the second roll 40 have blade portions 26 and 126 that face each other. When entering the recesses 127 and 27 of the other rolls, a shear clearance L is provided between the blades adjacent to the recesses of the other rolls. Specifically, in order to form the shear clearance L, the cutting blades 22 and 122 are formed with boss-shaped, that is, cylindrical clearance forming portions 28 and 128, respectively. In the present embodiment, the clearance forming portions 28 and 128 are formed by grinding when the cutting blade 122 is manufactured. In addition, what is necessary is just to set the shear clearance L according to the material and board thickness of a workpiece | work (metal plate).

By providing the shear clearance L, the generation of burrs during shearing is suppressed, and the processing accuracy can be stabilized.
In FIG. 4B, for convenience of explanation, the axial direction of the first rotating shaft 16 is shown exaggerated from the actual length in order to clearly show the clearance forming portions 28 and 128, and the first roll 20 The cutting blades 22 are alternately shown in a sectional view and a side view.

  In this embodiment, the retainer 21 of the first roll 20 corresponds to a first clearance management unit, a management member, a first management member, and a first retainer, and the retainer 121 of the second roll 40 is a second clearance management unit and a management. It corresponds to a member, a second management member, and a second retainer.

  In the present embodiment, when a work (metal plate) is sent between the first roll 20 and the second roll 40 of this roll forming apparatus and press-molded, the metal plate W is, as shown in FIG. As shown in FIG. 3, a plurality of concave and convex shapes in a row are continuously formed by the respective blade portions 26 of the respective cutting blades 22 of one roll 20 and the respective concave portions 127 of the respective cutting blades 122 of the second roll 40. The

In addition, in FIG. 3, the external shape of the 1st roll 20 and the 2nd roll 40 is illustrated with the locus | trajectory of the outermost periphery of the blade parts 26 and 126 for convenience of explanation.
(Operation of the first embodiment)
Now, the operation of the roll forming apparatus configured as described above will be described.

  In the roll forming apparatus according to this embodiment, the cutting blades 22 and 122 are stacked for the retainers 21 and 121 provided on the first roll 20 and the second roll 40 to form the cutting blade groups 23 and 123. In each retainer 21, 121, the number of cutting blades 22, 122 of the cutting blade groups 23, 123 is set to be within the length of the retainers 21, 121 in the axial length direction. That is, the total thickness value of the cutting blades 22 and 122 including the maximum total thickness tolerance of the cutting blades 22 and 122 in the cutting blade groups 23 and 123 is the same as or slightly smaller than the axial length of the retainers 21 and 121. The cutting blades 22 and 122 are selected, assembled and managed so as to have values. That is, in this way, in the first roll 20 and the second roll 40, the shear clearance of the cutting blades 22 and 122 facing each other for the retainers 21 and 121 is managed. For this reason, the first roll 20 and the second roll 40 configured by laminating a plurality of cutting blades 22 and 122 (total axial length) and between the blade portions 26 and 126 of the cutting blades 22 and 122 of each roll. The shear clearance can be easily managed, and the shear clearance can be properly maintained.

This embodiment has the following features.
(1) In the roll forming apparatus of the present embodiment, the plurality of cutting blades 22 and 122 stacked on the first roll 20 and the second roll 40 are formed of a member different from the cutting blade and have a shear clearance L. A plurality of retainers 21 (first clearance management unit) and a plurality of retainers 121 (second clearance management unit) are provided respectively. For this reason, it is possible to easily manage the total length of a pair of rolls configured by laminating a plurality of cutting blades and the clearance between the blade portions of the cutting blades of each roll, and appropriately maintain the shear clearance. it can. In addition, the variation in thickness tolerance of the cutting edge can be canceled for each retainer.

  (2) In the roll forming apparatus of the present embodiment, the plurality of retainers 21 and the plurality of retainers 121 are each laminated with a plurality of cutting blades 22 and 122 for each group, and the thickness of the cutting blade for each group is managed. A plurality of management members are used.

  For this reason, according to this embodiment, the thickness in the stacking direction of the cutting blades 22 and 122 for each group may be managed so that the shear clearance L does not become too small or too large. The stacking direction is the same as the axial direction. That is, the management of the total length of the first roll 20 and the second roll 40 is only by managing a group of cutting blades that fall within the axial length of the retainers 21 and 121 (management members), which is smaller than the number of cutting blades 22. Get better. Therefore, it becomes possible to relax the tolerance management of the cutting edge 22 itself. Furthermore, since the cutting edge thickness tolerance is relaxed, the cutting edge cost can be reduced. Further, the shear clearance L may be managed for each of the cutting blade groups 23 and 123. For this reason, management of the shear clearance L between the full length of a pair of rolls and the blade part of the cutting blade of each roll can be performed easily, and the shear clearance L can be hold | maintained appropriately.

  Furthermore, it is not necessary to perform set management of the cutting blades in the entire laminated state of the first roll and the second roll, and it is freed from the complexity of the management, and the assembling man-hours considering the tolerance of the cutting blade of the roll forming apparatus And the cost can be reduced.

  (3) In the roll forming apparatus of the present embodiment, the plurality of retainers 21 (management members) of the first roll 20 respectively fix the cutting blades 22 stacked for each group as the first management member and perform the first rotation. The first rotation shaft 16 is fixed to the shaft 16 and arranged in the axial direction of the first rotation shaft 16. The thickness in the stacking direction of the cutting blade group 23 stacked for each retainer 21 is managed within the axial length of the retainer 21.

  On the other hand, the plurality of retainers 121 (management members) of the second roll 40 fix the cutting blades 122 stacked for each group as the second management members, and are fixed to the second rotating shaft 18 to be mutually second. It is arranged in the axial direction of the rotating shaft 18. And the thickness of the cutting blade group 123 laminated | stacked for every retainer 121 is managed within the length of the axial direction of the retainer 121 within the axial direction. As a result, the effect (1) can be easily realized.

  (4) In the roll forming apparatus of the present embodiment, the retainer 21 is a first retainer that is fixed to the first rotating shaft 16 and the second retainer is fixed to the second rotating shaft 18. It is said. As a result, the effect (1) can be easily realized.

(Modification of the first embodiment)
Next, a modification of the first embodiment will be described with reference to FIGS. 5A to 5C and FIGS. 6A to 6D. 5 (a) to 5 (c) and FIGS. 6 (a) to 6 (d) are the retainers of the first roll 20 and the second roll 40 in the configuration of the first embodiment. Since the other configurations are the same except that the shapes of 21 and 121 are different, the same numbers are assigned to the same configurations as in the first embodiment, and different configurations will be described below. Further, in this modified embodiment, the blade portions 26 and 126 and the concave portions 27 and 127 of the cutting blade 22 are simplified and omitted for convenience of explanation, and in all of the cutting blades 22 in FIGS. The outer diameter is displayed as the same circle, and the outer shape of the cutting blade 22 is simply shown as a circle in FIGS. 6 (a) to 6 (d). In addition, in each embodiment described below including this modification, or also in the modification, the blades 26 and 126 and the recesses 27 and 127 of the cutting blade 22 are simplified for convenience of description unless otherwise specified. The outer diameters of all the cutting blades 22 are illustrated in the same circle.

(Modification of FIG. 5A)
Although the ribs 30 and 130 are provided in the retainers 21 and 121 of the first embodiment, the ribs 30 and 130 are omitted in the modified mode of FIG. 5A, and the outer diameter of the retainers 21 and 121 is between the retainers 21 and 121. It is formed to have a magnitude relationship. In FIG. 5A, for convenience of explanation, in order to show the magnitude relationship between the outer diameters of the two retainers 21 and 121, symbols a and b are further added. That is, the relationship between the outer diameters of the retainers 21a, 21b, 121a, 121b is "the outer diameter of the retainers 21a, 121a> the outer diameter of the retainers 21b, 121b". The number of retainers is two or more, and the number of retainers is not limited as long as there is a size relationship between the outer diameters. The number of retainers is not limited in the same manner as described above.

  As described above, since the outer diameters of the retainers 21a and 121a are larger than the outer diameters of the retainers 21b and 121b, the cutting blades 22 and 122 disposed on the retainers 21b and 121b side due to the difference in the outer diameters. The movement toward the retainers 21a and 121a is restricted. This length difference portion corresponds to a regulating means for regulating the movement of the cutting blade in the axial length direction.

(Modification of FIG. 5B)
5B, the ribs 30 and 130 of the first embodiment are omitted, and circular rings 31 and 131 having outer diameters longer than the retainers 21 and 121 are provided. In this aspect, the thickness of the rings 31 and 131 is the thickness of the two cutting blades 22, and the two cutting blades are connected to the outer periphery of the rings 31 and 131 by a key (not shown) so that the rings 31 and 131 can be rotated. It is made immovable and movable in the axial direction. In addition, the thickness of the rings 31 and 131 is not limited to two pieces of the cutting blade 22, and may be one piece or three or more pieces. In this embodiment, the rings 31 and 131 correspond to a restricting means that restricts the movement of the cutting edge in the axial length direction.

(Modification of FIG. 5C)
In this embodiment, as shown in FIGS. 5C, 6A, and 6B, the retainer is formed in a cylindrical shape and is eccentric with respect to the first rotating shaft 16 and the second rotating shaft 18. It is fixed through. In FIG. 5 (c), for the convenience of explanation, in order to distinguish the eccentric directions of the two retainers 21 and 121, symbols c and d are further added to the numbers of the retainers 21. In other words, the retainers 21c and 121c and the retainers 21d and 121d are eccentrically arranged in directions opposite to each other by 180 degrees and are key-connected to the first rotating shaft 16 and the second rotating shaft 18 by the keys 24 and 124.

  In addition, in this aspect, although the retainer was eccentric in the opposite direction by 180 degrees, the eccentric direction may be a direction different from adjacent retainers. Due to this eccentricity, stepped portions 32 and 132 are formed in which one of the adjacent retainers is displaced in a direction perpendicular to the axial length direction between the adjacent retainers as shown in FIG. 5 (c). The step portions 32 and 132 correspond to restricting means for restricting movement of the cutting blade in the axial length direction.

  As a further modification of this modification, square cylindrical retainers 21c and 21d may be used instead of the cylindrical retainers as shown in FIGS. 6 (c) and 6 (d). In this case, the key 25 (125) may be omitted. In addition, the cross-sectional shape of the retainer is not limited to a shape other than a cylindrical shape or a rectangular tube shape, for example, a cylindrical shape having a polygonal cross section, a cylindrical shape having an elliptical cross section, or the like. In addition, when the retainers have different cross-sectional shapes and the retainers are fixed to the first rotating shaft 16 or the second rotating shaft 18 by passing through the retainers, a part of both retainer end faces comes into contact with each other. It is good also as a shape which forms the level | step-difference part which is not contact | abutting to one or both end surfaces. In this case, the stepped portion becomes a restricting means for restricting the movement of the cutting blade in the axial length direction.

( Reference Example 1 )
Next, the roll forming apparatus of Reference Example 1 will be described with reference to FIG. 7, FIG. 8 (a) and FIG. 8 (b). In Reference Example 1 , the same or corresponding configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and different configurations will be described below. In FIG. 8A, the clearance forming portion 28 of the cutting blade 22 has a small thickness, and is omitted for convenience of explanation. However, it should be understood that it is present. In addition, each embodiment described below, including reference example 1 , other reference examples and modifications thereof , and modifications thereof are similarly described with respect to the configurations described previously, and the same reference numerals are used for corresponding configurations. Is attached.

In the reference example 1 , the retainers 21 and 121 are omitted in the configuration of the first embodiment, and instead, a plurality of cutting blades 22 and 122 stacked on the first rotating shaft 16 and the second rotating shaft 18 are provided. The key 33 is non-rotatably connected and movable in the axial direction.

  Further, as shown in FIG. 7, a first backup shaft 42 disposed in parallel with the first rotation shaft 16 is supported between the side walls 12 and 13 above the first rotation shaft 16 via a bearing 47 so as to be rotatable. Has been. A plurality of friction plates 43 made of metal or the like and having friction resistance are fixed to the first backup shaft 42 at equal intervals or at unequal intervals. As shown in FIG. 8A and FIG. 8B, protrusions 44 that engage in the respective recesses 27 of the cutting blade 22 of the first roll 20 positioned below are provided on the peripheral surface of the separation plate 43. Are formed at a predetermined pitch. And each protrusion 44 of the dividing plate 43 is formed so as to mesh with the protrusion 44 of the cutting blade 22 of the opposing first roll 20. And when the 1st roll 20 rotates, the projection part 44 engages with the blade part 26 of the cutting blade 22, and the dividing plate 43 rotates with the 1st backup shaft 42. As shown in FIG.

  Instead of forming the separation plate 43 in a meshing relationship with the cutting blade 22, the first backup shaft 42 may be rotated in synchronization with the first rotating shaft 16 via a gear mechanism (not shown).

  As shown in FIG. 8A, when the separation plate 43 is engaged in the recess 27, the cutting blade 22 adjacent to the cutting blade 22 having the recess 27 (in FIG. 8, the cutting blades 22p.22q). The movement in the axial length direction is restricted. A cutting blade group 23 in which the cutting blades 22 are stacked is disposed between the separation plates 43. In FIG. 8A, for convenience of explanation, the cutting blade group 23 is formed by three cutting blades 22 between the partition plates 43, but the number of cutting blades 22 in the cutting blade group 23 is three. It is not limited to the number of sheets, and may be two or more.

  Further, as shown in FIG. 7, a second backup shaft 45 disposed in parallel with the second rotation shaft 18 is rotatably supported between the side walls 12 and 13 below the second rotation shaft 18. A plurality of friction plates 46 made of metal or the like and having friction resistance are fixed to the second backup shaft 45 at equal intervals or at unequal intervals. The interval between the separation plates 46 is preferably matched with the interval between the separation plates 43.

  The relationship between the separation plate 46 and the cutting blade 122 of the second roll 40 is different from the positional relationship between the separation plate 43 and the cutting blade 22 of the first roll 20 only in the upside down direction. The function of the first roll 20 with respect to the cutting edge 22 is the same. In the above description, “first roll 20” is “second roll 40”, “fraction plate 43” is “fraction plate 46”, “cutting blade 22” is “cutting blade 122”, “cutting blade” The “group 23” is the “cutting blade group 123”, the “concave portion 27” is the “concave portion 127”, the “first backup shaft 42” is the “second backup shaft 45”, and the “projection 44” is the “projection”. Since it can be explained by replacing it with “(not shown)”, the detailed explanation is omitted.

In Reference Example 1 , the first backup shaft 42 corresponds to a first clearance management unit and a single management member. The fraction plate 43 corresponds to a first fraction management unit. In the first reference example , the second backup shaft 45 corresponds to a second clearance management unit and a single management member. The fraction plate 46 corresponds to a second fraction management unit.

( Operation of Reference Example 1 )
Next, management of the shear clearance L in the roll forming apparatus of Reference Example 1 will be described. In this case, it is assumed that each of the first backup shaft 42 and the second backup shaft 45 is fixed in advance at a distance between the respective separation plates 43 and the respective separation plates 46. Further, it is assumed that the first backup shaft 42 and the second backup shaft 45 are attached so that the respective partition plates 43 and the respective partition plates 46 are accurately opposed to the side walls 12 and 13.

  Since the space between the separation plates 43 is fixed in advance to the first backup shaft 42, the distance T between the separation plates 43 (hereinafter referred to as the restriction value between the separation plates) is measured in advance by the operator. I understand. Further, the distances T1 and T2 between the collar 29 shown in FIG. 7 and the separation plate 43 located in the vicinity of the collar 29 (hereinafter referred to as color / fractionation plate regulation values T1 and T2) are also measured. Accordingly, the maximum number of cutting blades 22 that are stacked so as to be within these regulation values and that takes into account tolerances can be obtained.

  Then, one of the collars 29 is fixed to the first rotating shaft 16, and a plurality of cutting blades 22 corresponding to the maximum number of sheets allowed from the collar 29 to being regulated by the first separation plate 43 are sequentially arranged. Laminate. At this time, when the maximum number of sheets is stacked by stacking tolerances, if the color / divider board regulation value T1 is exceeded, the cutting edge 22 to be laminated is changed to another cutting blade, and the color / divider board regulation value is set. Do not exceed. Thereafter, the cutting blades 22 are similarly laminated in the case of the separation plate regulation value T. Finally, the cutting blades 22 are stacked in the same manner for the color / divider plate regulation value T2. Thereafter, the movement of the cutting blades 22 stacked while fixing the other collar 29 to the first rotation shaft 16 is restricted.

Although not described above, the stacked cutting blades 22 are attached to the first rotary shaft 16 so as not to rotate by the key 33.
As with the first roll 20, the cutting blade 122 is laminated on the second roll 40.

  Then, the second backup shaft 45, the second rotation shaft 18, the first rotation shaft 16, and the first backup shaft 42 are assembled to the side walls 12 and 13 in this order, and the cutting blade 122 in the stacked state of the second roll 40 is assembled. A plurality of cutting blades are divided into a plurality of cutting blade groups by the plurality of dividing plates, and the cutting blades 22 in the stacked state of the first roll 20 are divided into a plurality of cutting blade groups by a plurality of dividing plates 43 (that is, classification). ) The same applies to the second roll 40. As a result, the thickness of each of the cutting blade groups 23 and 123 is managed, and consequently the shear clearance is managed, so that the shear clearance between the cutting blades of the first roll 20 and the second roll can be easily managed. Can do.

Reference Example 1 has the following characteristics in addition to the effects (1) and (2) of the first embodiment.
(1) In the roll forming apparatus of Reference Example 1 , the first backup shaft 42 is disposed as a single management member that is a first clearance management unit, in parallel and rotatably with respect to the first roll 20. The first backup shaft 42 is provided with a plurality of separation plates 43 (first fraction management units) for dividing and managing a plurality of cutting blades 22 into a plurality of stacked cutting blade groups 23. In addition, the second backup shaft 45 is disposed as a single management member that is the second clearance management unit, in parallel with the second roll 40 and rotatably. The second backup shaft 45 is provided with a plurality of separation plates 46 (second fraction management units) for dividing and managing the plurality of cutting blades 122 into a plurality of stacked cutting blade groups. As a result, the thickness in the stacking direction can be managed for each group of cutting blades so that the shear clearance between the first roll 20 and the second roll 40 due to accumulation of the cutting edge thickness tolerance is not excessively small or excessive. As a result, the variation in thickness tolerance of the cutting blade can be canceled for each cutting blade group managed by the separation plate 43 (first fraction management unit) and the separation plate 46 (second fraction management unit).

Moreover, according to the reference example 1 , what is necessary is just to manage the thickness of the lamination direction of the cutting blades 22 and 122 for every group so that the shear clearance L may not become too small or too large. That is, the management of the total length of the first roll 20 and the second roll 40 only needs to manage the cutting blade group existing within the distance between the separation plates and the distance between the collar and the separation plate, which is smaller than the number of cutting blades. Therefore, it becomes possible to loosen the management of the tolerance of the cutting edge itself. Furthermore, since the cutting edge thickness tolerance is relaxed, the cutting edge cost can be reduced. In addition, the shear clearance L may be managed for each cutting blade group. For this reason, management of the shear clearance L between the full length of a pair of rolls and the blade part of the cutting blade of each roll can be performed easily, and the shear clearance L can be hold | maintained appropriately.

  Furthermore, it is not necessary to perform set management of the cutting blades in the entire laminated state of the first roll and the second roll, and it is freed from the complexity of the management, and the assembling man-hours considering the tolerance of the cutting blade of the roll forming apparatus And the cost can be reduced.

(Modification of Reference Example 1)
Next, with reference to FIG. 8 (a) illustrating a modified example of Example 1. In Reference Example 1 , the separation plates 43 and 46 are fixed to the first backup shaft 42 and the second backup shaft 45, respectively, but instead of being fixed, as shown in FIG. 46 is provided between the bearing 47 and the separation plate 43, and between the separation plates 43, and a bush 48 is provided to position the separation plates 43 and 46 on the first backup shaft 42 and the second backup shaft 45, respectively. May be. In this case, the separation plate 43 is configured to be unable to rotate around the axis of the first backup shaft 42. For example, the circumferential surface of the first backup shaft 42 is formed with one or a plurality of key grooves (not shown) extending in the entire axial direction, and the partition plate 43 has an axial length direction with respect to the key grooves (not shown). What is necessary is just to carry out by the structure which provides the protrusion which engages slidably in this. The configuration in which the separation plate 46 cannot be rotated with respect to the second backup shaft 45 may be configured in the same manner as described above. The bush 48 corresponds to a positioning member for the first backup shaft 42 and the second backup shaft 45 of the separation plates 43 and 46.

(Effect of the modification)
Assume that the lengths in the axial length direction of the bushes 48 respectively attached to the first backup shaft 42 and the second backup shaft 45 are previously measured by an operator or the like and are known. With the bush 48 and the dividing plates 43 and 46 attached to the first backup shaft 42 and the second backup shaft 45, the length from the bearing 14 to the mounting position of the collar 29, the thickness of the collar 29, the bearing 47 and The length in the axial direction of the bush 48 between the fraction plates 43, the length in the axial direction of the bush 48 between the fraction plates 43, and the thickness of each fraction plate 43 are also known in the same manner.

As described above, since the length of each bushing 48 in the axial length direction is known, the distance between the collar 29 and the separation plate 43 closest to the collar 29 can be calculated by the operator. Further, the distance between the adjacent partition plates 43 is known as the length of the bush 48 interposed therebetween. For this reason, those distances and lengths are set as regulation values in the same manner as in Reference Example 1, and the maximum number of cutting blades 22 that are stacked so as to be within the regulation values are taken into consideration.

Hereinafter, in the same manner as in Reference Example 1 , the cutting blades 22 are stacked so as to be within these regulation values in the first roll 20, and the cutting blades 122 are stacked so as to be within these regulation values in the second roll 40. do it. Then, after stacking, in the same manner as in Reference Example 1 , the second backup shaft 45, the second rotation shaft 18, the first rotation shaft 16, and the first backup shaft 42 are assembled to the side walls 12 and 13 in this order. The cutting blade 122 in the stacked state of the second roll 40 is divided into a plurality of cutting blade groups by a plurality of dividing plates 46, and the cutting blade 22 in the stacked state of the first roll 20 is divided into a plurality of dividing plates 43. The plurality of cutting blade groups 23 are fractionated (that is, divided). The same applies to the second roll 40. As a result, the thickness of each of the cutting blade groups 23 and 123 is managed, and consequently the shear clearance is managed, so that the shear clearance between the cutting blades of the first roll 20 and the second roll can be easily managed. Can do.

( Reference Example 2 )
Next, the roll forming apparatus of Reference Example 2 will be described with reference to FIGS. 1 and 9A. In addition, about the same structure as 1st Embodiment, the same number is attached | subjected, the description is abbreviate | omitted, and a different structure is demonstrated.

  In the roll forming apparatus of this embodiment, as shown to Fig.9 (a), the structure of the 1st roll 20 and the 2nd roll 40 differs from 1st Embodiment. In addition, since the structure of the 2nd roll 40 is the same structure as the 1st roll 20, the 1st roll 20 is demonstrated typically and in each structure of the 2nd roll 40, it is the same as the structure of the 1st roll 20, or About the corresponding structure, the number which added "100" with respect to the number attached | subjected to the structure of the 1st roll 20 is attached | subjected, and the description is abbreviate | omitted.

In the reference example 2 , the first rotating shaft 16 is configured by a pair of support shafts 50 and 52 that are respectively supported on the bearing 14 as the first bearing and arranged coaxially. The support shafts 50 and 52 correspond to the first support shaft.

  A plurality of columnar split shafts 54 are connected to both the support shafts 50 and 52 so as to be coaxial with each other. The division shaft 54 corresponds to a first clearance management unit, a management member, a first management member, and a first shaft member. That is, as shown in FIG. 9A, the end of the support shaft 50 opposite to the bearing and each split shaft 54 are formed with fitting protrusions 50a and 54a on the respective end surfaces, and each split shaft 54 is formed. In addition, the fitting holes 54b and 52b formed on the end surface of the support shaft 52 are fitted and connected to each other, and the both ends thereof are prevented from rotating by knock pins 56 press-fitted to the opposite end surfaces.

  A circular rib 55 having an outer shape having the same function as that of the rib 30 provided in the retainer 21 of the first embodiment is formed on a peripheral portion on one end side of the split shaft 54. The rib 55 corresponds to a regulating means (regulating member) that regulates the movement of the cutting blade 22 in the axial length direction. As with the retainer 21 of the first embodiment, the cutting blade 22 is attached to the outer peripheral surface of each split shaft 54 and the outer surface of the rib 55 by a key (not shown) so as not to be rotatable and movable in the axial length direction. Yes. As shown in FIG. 1, the collar 29 is attached and fixed to the support shafts 50 and 52, that is, the first rotary shaft 16, and the cutting blade 22 positioned on the end face side of the split shaft 54 is axially extended. Is restricted from moving.

  In the second roll 40, the second rotating shaft 18 is constituted by support shafts 150 and 152. The support shafts 150 and 152 correspond to the second support shaft. The split shaft 154 corresponds to a second clearance management unit, a management member, a second management member, and a second shaft member. The rib 155 corresponds to a regulating means (regulating member) that regulates the movement of the cutting edge 122 in the axial length direction.

( Operation of Reference Example 2 )
In the roll forming apparatus of Reference Example 2 , the cutting blade groups 23 and 123 are formed by stacking the cutting blades 22 and 122 for each of the split shafts 54 and 154 provided on the first roll 20 and the second roll 40. In each of the split shafts 54 and 154, the number of the cutting blades 22 and 122 of the cutting blade groups 23 and 123 is set to be within the length of the split shafts 54 and 154 in the axial direction. That is, the total thickness of the cutting blades 22 and 122 including the maximum total value of the thickness tolerances of the cutting blades 22 and 122 in the cutting blade groups 23 and 123 is the same as or slightly the axial length of the split shafts 54 and 154. The cutting blades 22 and 122 are selected and assembled so as to have a small value, and the thickness of each of the cutting blade groups 23 and 123 is managed, and consequently, the shear clearance is managed. That is, in this way, in the first roll 20 and the second roll 40, the shear clearance of the cutting blades 22 and 122 facing each other on the split shafts 54 and 154 is managed. For this reason, the first roll 20 and the second roll 40 configured by laminating a plurality of cutting blades 22 and 122 (total axial length) and between the blade portions 26 and 126 of the cutting blades 22 and 122 of each roll. The shear clearance can be easily managed, and the shear clearance can be properly maintained.

Reference Example 2 has the following characteristics in addition to the effects (1) to (3) of the first embodiment.
(1) In the roll forming apparatus of Reference Example 2 , the first rotating shaft 16 is constituted by a pair of support shafts 50 and 52 (first support shafts), and a split shaft 54 connected and fixed between the support shafts 50 and 52 is provided. The first shaft member was used. The second rotating shaft 18 is composed of a pair of support shafts 150 and 152 (second support shafts), and the split shaft 154 connected and fixed between the support shafts 150 and 152 is used as the second shaft member. As a result, according to the roll forming apparatus of Reference Example 2 , it is possible to cancel the variation in the thickness tolerance of the cutting blades 22 and 122 for each of the split shafts 54 and for each of the split shafts 154.

(Modification of Reference Example 2)
Next, FIG. 9 a modification of Reference Example 2 (b), will be described with reference to FIG. 9 (c) and FIG. 10 (a) ~ (d) .

(Modification in FIG. 9 (b))
Although the ribs 55 and 155 are provided on the split shafts 54 and 154 of the reference example 2 , the ribs 55 and 155 are omitted in the modified example of FIG. 9B, and the outer diameters of the split shafts 54 and 154 are the split shafts 54 and 154. It is formed so as to have a magnitude relationship between them. In FIG. 9B, for convenience of explanation, in order to show the magnitude relationship between the outer diameters of the two split shafts 54 and 154, symbols C and D are further added. That is, the relationship between the outer diameters of 54C, 54D, 154C, and 154D is “the outer diameter of the split shafts 54C and 154C> the outer diameter of the split shafts 54D and 154D”. Note that the number of split axes is two or more, and the number is not limited as long as there is a relationship between the outer diameters. The number of retainers is not limited in the same manner as described above in the following reference example .

  As described above, since the outer diameters of the split shafts 54C and 154C are larger than the outer diameters of the split shafts 54D and 154D, the cutting blades 22 and 122 disposed on the split shaft 54D side are caused by the difference in the outer diameter. The movement toward the split shafts 54C and 154C is restricted. This difference in outer diameter corresponds to a restricting means for restricting the movement of the cutting edge in the axial length direction.

(Modification of to FIG. 9 (c))
In this modification , as shown in FIGS. 9C, 10A, and 10B, the split shafts are the support shafts 50 and 52 of the first rotary shaft 16, the support shaft 150 of the second rotary shaft 18, It is connected and fixed eccentrically with respect to 152. In FIG. 9 (c), for the sake of convenience of explanation, in order to distinguish the eccentric directions of the two split shafts 54 (154), symbols E and F are added to the numbers of the split shafts 54. In other words, the split shafts 54E and 154E and the split shafts 54F and 154F are eccentric to each other by 180 degrees opposite to each other, and are opposite to the rotation directions of the first roll and the second roll with respect to the support shafts 50, 52, 150, and 152. It is screwed. The support shafts are coupled and fixed by knock pins 56 and 156 so that their rotational phases are not shifted from each other, and the projections 54g on the end surfaces of the split shafts 54F and 154F are fitted into the fitting holes of the split shafts 54E and 154E. Are fitted.

In this modification , the split axes are decentered in directions opposite to each other by 180 degrees. However, the decentering direction may be any direction that is different from adjacent split axes. Due to this eccentricity, as shown in FIG. 9C, stepped portions 57 and 157 are formed in which one is displaced in the direction perpendicular to the axial direction from the other between the adjacent divided axes. The step portions 57 and 157 correspond to a restricting means for restricting the movement of the cutting blade in the axial length direction.

As a further modification of this modified example , as shown in FIGS. 10C and 10D, instead of the columnar division axis, division axes 54E, 54F, 154F, and 154E having a square cross section may be used. . Further, the sectional shape of the dividing axis is not limited, and there are shapes other than a columnar shape and a sectional square shape, such as a polygonal sectional shape and a sectional elliptical shape. Moreover, when the sectional shapes of the split shafts are different from each other, and the split shafts are connected to the support shafts 50 and 52 of the first rotary shaft 16 or the support shafts 150 and 152 of the second rotary shaft 18, Although some parts of the shaft end surface are in contact with each other, a stepped portion that is not in contact with either or both of the end surfaces may be formed. In this case, the stepped portion becomes a restricting means for restricting the movement of the cutting blade in the axial length direction.

( Reference Example 3 )
Next, the roll forming apparatus of Reference Example 3 will be described with reference to FIG. 11, FIG. 12 (a) and FIG. 12 (b).

In the roll forming apparatus of Reference Example 3 , as shown in FIG. 11, the configurations of the first roll 20 and the second roll 40 are different from those of the first embodiment. In addition, since the structure of the 2nd roll 40 is the same structure as the 1st roll 20, the 1st roll 20 is demonstrated typically and in each structure of the 2nd roll 40, it is the same as the structure of the 1st roll 20, or About the corresponding structure, the number which added "100" with respect to the number attached | subjected to the structure of the 1st roll 20 is attached | subjected, and the description is abbreviate | omitted.

In the reference example 3 , instead of omitting the retainer 21 in the configuration of the first embodiment, a plurality of cutting blades 22 are key-connected to the first rotating shaft 16. That is, as shown in FIG. 11, the plurality of cutting blades 22 are fixed by a single key 58 fitted and fixed in a key groove 16 c formed on the peripheral surface of the first rotating shaft 16.

  A plurality of ribs 59 protrude from the key 58 in the axial length direction, and a plurality of cutting blades 22 are stacked in a plurality of recesses 60 formed between the ribs 59. The cutting edge 22 stacked in the recess 60 is formed in a substantially ring shape and has a through hole 22a that allows the first rotating shaft 16 to be inserted. The through-hole 22a has an inner periphery 22b that abuts against the bottom surface of the recess 60 as shown in FIG.

In addition, as shown in FIG. 11, one or a plurality of cutting blades 22 are laminated on one rib 59 adjacent to the recess 60. In Reference Example 3 , the thickness of the rib 59 is the thickness of a single cutting blade 22 minutes. The cutting blade 22 mounted on the rib 59 has a through-hole 22 a that is formed in a substantially ring shape and allows the first rotary shaft 16 to be inserted, and has a U-shaped recess 22 c that abuts the outer shape of the rib 59. The number of ribs 59 is not limited.

In Reference Example 3 , the cutting blade 22 mounted on the rib 59 and the cutting blade 22 stacked on one recess 60 constitute a set of cutting blade groups 23 as shown in FIG. Are configured to have two sets. A pair of collars 29 are fixed to the first rotating shaft 16 at both ends of the key 58 in the axial direction.

  At the time of assembly, a plurality of cutting blades 22 and 122 are stacked on the keys 58 and 158, respectively, and then the cutting blades 22 and 122 are passed through the first rotary shaft 16 and the second rotary shaft 18 in this state, and the keys 58 and 158 are fitted in the key grooves 16c and 18c.

In the second rotating shaft 18, the key 158 in FIG. 12B is fitted and fixed in the key groove 18c.
In Reference Example 3 , the key 58 corresponds to a single management member, a first clearance management unit, and a first key. The key groove 16c corresponds to the first key groove. The rib 59 corresponds to a first fraction unit. A key 158 provided on the second roll 40 corresponds to a single management member, a second clearance management unit, and a second key. The key groove 18c corresponds to the second key groove. The rib 159 corresponds to a second fractionation unit. The ribs 59 and 159 correspond to restriction means (regulation member) for restricting movement of the cutting blade in the axial direction.

( Operation of Reference Example 3 )
In the roll forming apparatus of Reference Example 3 , the cutting blades 22 and 122 are provided for each recess 60 and rib 59 of the keys 58 and 158 provided on the first roll 20 and the second roll 40 and for each recess 160 and rib 159. A plurality of cutting blade groups 23 and 123 are formed by stacking. That is, the total value of the thicknesses of the cutting blades 22 and 122 including the maximum total value of the thickness tolerances of the cutting blades 22 and 122 in the cutting blade groups 23 and 123 is the axis of the concave portion 60 and the rib 59, and the concave portion 160 and the rib 159. The cutting blades 22 and 122 are selected, assembled and managed so as to be equal to or slightly smaller than the length in the long direction. In this way, in the first roll 20 and the second roll 40, the thickness of the cutting blade group 23 is managed by the keys 58 and 158, and the thicknesses of the first roll 20 and the second roll 40 are respectively opposed to the first rotary shaft 16 and the second rotary shaft 18. The first and second rolls 20 and 40 are attached and fixed to manage the shear clearances of the cutting edges 22 and 122 facing each other.

  For this reason, the first roll 20 and the second roll 40 configured by laminating a plurality of cutting blades 22 and 122 (total axial length) and between the blade portions 26 and 126 of the cutting blades 22 and 122 of each roll. The shear clearance can be easily managed, and the shear clearance can be properly maintained.

Reference Example 3 has the following characteristics in addition to the effects (1) to (3) of the first embodiment.
(1) In the roll forming apparatus of Reference Example 3 , as a single management member that is a first clearance management section, the roll forming apparatus is fitted to a key groove 16c (first key groove) formed on the first rotating shaft 16. And a key 58 (first key) for fixing the plurality of cutting blades 22 arranged on the first roll 20. The key 58 is provided with a plurality of ribs 59 (first fraction portions) that manage the plurality of cutting blades 22 so as to be divided into a plurality of stacked cutting blade groups 23. Further, in the roll forming apparatus of Reference Example 3 , as a single management member that is the second clearance management section, it is fitted into a key groove 18c (second key groove) formed on the second rotating shaft 18. A key 158 (second key) for fixing the plurality of cutting blades 122 arranged on the second roll 40 is provided. The key 158 is provided with a plurality of ribs 159 (second fraction units) that manage the plurality of cutting blades 122 to be divided into a plurality of stacked cutting blade groups 123. As a result, the thickness in the stacking direction can be managed for each group of cutting blades so that the shear clearance between the first roll and the second roll due to accumulation of the cutting edge thickness tolerance is not too small or too large. As a result, the variation in the thickness tolerance of the cutting edge can be canceled for each cutting blade group managed by the first division management unit and the second division management unit.

(Modification of Reference Example 3)
Next, a modified example of Example 3 with reference to FIGS. 13 (a) and 13 (b).
(Modification of FIG. 13 (a))
In the reference example 3 , the single blades 58 and 158 are used to divide the cutting blades 22 and 122 of the first roll 20 and the second roll 40 into cutting blade groups 23 and 123, respectively. Although the thicknesses thereof are managed and eventually the shear clearance is managed, in the modified example of FIG. 13A, the key 58 is divided into two so that the keys have the same size. In this example , ribs 59 and 159 are provided on the same one end side in the axial direction of the key 58. The plurality of keys 58 and 158 manage the thickness of each of the cutting blade groups 23 and 123, thereby managing the shear clearance. The keys 58 and 158 may be divided into three or more.

(Modification of FIG. 13 (b))
In the reference example 3 , the single blades 58 and 158 are used to divide the cutting blades 22 and 122 of the first roll 20 and the second roll 40 into cutting blade groups 23 and 123, respectively. Although the thicknesses thereof are managed and eventually the shear clearance is managed, in the modified example of FIG. 13B, the key 58 is divided into two parts, the key 58a having a larger outer diameter and the key 58 having a smaller outer diameter. A key 58b is provided, and the ribs 59 and 159 are omitted.

  As described above, since the outer diameters of the keys 58a and 158a are larger than the outer diameters of the keys 58b and 158b, the cutting blades 22 and 122 arranged on the key 58b and 158b side due to the difference of the outer diameters. The movement toward the keys 58a and 158a is restricted. The difference portions 61 and 161 of the outer diameter correspond to a restricting means for restricting the movement of the cutting edge in the axial length direction.

( Second Embodiment: Support of Claim 2 )
Next, a second embodiment will be described with reference to FIGS. 14 (a) to 14 (c). In the second embodiment, as shown in FIG. 14C, the plurality of cutting blades 22 and 122 of the first roll 20 and the second roll 40 are circular ring-shaped shims 64, respectively, in the configuration of the first embodiment. 164 is attached to the first rotating shaft 16 and the second rotating shaft 18 of the first embodiment via the retainers 21 and 121 via the 164. The shims 64 and 164 are non-rotatably attached by keys 24 a and 124 a fitted in the key grooves 21 e and 121 e of the retainers 21 and 121 and grooves 64 a and 164 a provided in the shims 64 and 164. The entire group of cutting blades 22 and 122 (shim 64 and 164) in a stacked state is sandwiched between a pair of collars 29 and 129 fixed to the first rotating shaft 16 and the second rotating shaft 18.

  The shims 64 and 164 are made of metal and are formed thicker than the cutting blades 22 and 122 as shown in FIG. As the shims 64 and 164, for example, commercially available shims can be used.

  In the present embodiment, unlike the first embodiment, the cutting blades 22 and 122 are not formed with the clearance forming portions 28 and 128, and instead of the clearance forming portions 28 and 128, the cutting blades 22 and 122 are determined from the thickness of the shim 64. A difference in thickness 122 is used as a clearance forming portion. For this reason, it is not necessary to form the clearance forming portions 28 and 128 on the cutting blades 22 and 122 themselves by grinding or the like. The thickness is thin except for the clearance forming portion. And since the clearance formation part of this embodiment is made into the difference of the thickness of the cutting blades 22 and 122 from the thickness of the shim 64 as mentioned above, it will be sufficient only to manage the thickness of the shim 64. The shims 64 and 164 are fixed to the cutting blades 22 and 122 by a well-known method by shrink fitting or the like. When the cutting blades 22 and 122 need to be replaced due to wear, they can be replaced separately from the shims 64 and 164 by a known process such as a heating process.

The shim 64 corresponds to a first shim and a first clearance management unit. The shim 164 corresponds to a second shim and a second clearance management unit.
(Operation of Second Embodiment)
In the present embodiment, shims 64 and 164 whose thicknesses are controlled are fixed to the cutting blades 22 and 122, respectively. And in the 1st roll 20 and the 2nd roll 40, those cutting blades 22 and 122 are laminated, attached and fixed to retainers 21 and 121 of the 1st rotating shaft 16 and the 2nd rotating shaft 18, respectively, The shear clearance of the opposing cutting edges 22 and 122 is managed.

The present embodiment has the following characteristics in addition to the effect (1) of the first embodiment.
(1) In the roll forming apparatus of the present embodiment, the shim 64 is attached to each cutting blade of the first rotating shaft 16 as a first clearance management unit that is a member different from the cutting blade 22. It is provided between the cutting blades 22. Further, the shim 164 is attached to each cutting edge 122 of the second rotating shaft 18 as a second clearance management unit that is a member different from the cutting edge 122 and is provided between the second rotating shaft 18 and the cutting edge 122. It has been. The shear clearance is controlled by the thickness of the shim 64 and the shim 164.

  As a result, according to this embodiment, the shim 64 attached to each cutting edge 22 of the first roll 20 and the shim 164 attached to each cutting edge 122 of the second roll 40 can reduce the cost of the first roll. The thickness in the stacking direction can be easily managed so that the shear clearance between the roll 20 and the second roll 40 does not become too small or too large, and the shear clearance can be maintained appropriately. In addition, it becomes possible to loosen the management of the tolerance of the cutting blade 22 itself. Furthermore, since the cutting edge thickness tolerance is relaxed, the cutting edge cost can be reduced. Further, the shear clearance L may be managed for each of the cutting blade groups 23 and 123. For this reason, management of the shear clearance L between the full length of a pair of rolls and the blade part of the cutting blade of each roll can be performed easily, and the shear clearance L can be hold | maintained appropriately. Furthermore, it is not necessary to perform set management of the cutting blades in the entire laminated state of the first roll and the second roll, and it is freed from the complexity of the management, and the assembling man-hours considering the tolerance of the cutting blade of the roll forming apparatus And the cost can be reduced.

(Modification of the second embodiment)
FIGS. 15A and 15B are modifications of the second embodiment. In the second embodiment, the single shims 64 and 164 formed in a circular ring shape are connected to the cutting blades 22 and 122, whereas in this modification, the retainer 21 of the cutting blades 22 and 122 is used. A plurality of shims 65 and 165 are attached to the through-holes 22a and 122a that are fitted to the 121 and 121, respectively. Specifically, a plurality of recesses 22d and 122d are provided in the periphery of the through holes 22a and 122a, and shims 65 and 165 are fitted in the recesses 22d and 122d. The shims 65 and 165 are preferably arranged so as to extend in the radial direction from the centers of the through holes 22a and 122a and at equal pitches.

And the cutting blades 22 and 122 are not formed with the clearance forming portions 28 and 128 as in the second embodiment, and instead of the clearance forming portions 28 and 128, the thickness of the shim 65 and the cutting blades 22 and 122 The difference in thickness is used as a clearance forming portion.

  15A and 15B, in one of the recesses 22d and 122d of the through holes 22a and 122a, the length of the shims 65 and 165 is made shorter than the other shims 65 and 165, so that the key 24a , 124a are provided in the grooves 22e, 122e.

Both side surfaces of the shims 65 and 165 positioned in the thickness direction are formed in the same plane and parallel to each other. Also in this modified mode, it is possible to achieve the same effect as in the second embodiment. The planar shape of the shim is not limited.

(Third embodiment: support of claim 3 )
A third embodiment will be described with reference to FIGS. 16, 17A, and 17B. In the third embodiment, instead of forming the clearance forming portions 28 and 128 of the cutting blades 22 and 122 by grinding in the configuration of the first embodiment, the clearance forming portions 28 and 128 of the cutting blades 22 and 122 are solid. The difference is that a filler 70 including particles 68 and a flow agent 69 is applied.

  The fluidizing agent 69 is not limited as long as it is viscous, and examples thereof include an adhesive, a pressure-sensitive adhesive, and a gel-like body. In addition, since an adhesive and a gel-like body become easy to disassemble | stack the cutting blades 22 and 122 of the lamination | stacking state after an assembly | attachment, and excellent in maintainability, they are preferable.

  Examples of the solid particles 68 include ceramic powder having a uniform particle diameter, for example, ceramic powder of several to several hundred microns, glass beads, and the like. Such solid particles 68 can ensure a shear clearance larger than the diameter.

The formation method of the clearance formation parts 28 and 128 of this embodiment is demonstrated.
As shown to Fig.17 (a), after applying the filler 70 to the side surface of the some cutting blades 22 and 122 mounted on the retainer 21 and 121 on the side surface of the cutting blades 22 and 122, respectively, it pressurizes and these cutting blades 22 and 122 are laminated on the rib 30 side. As a result, the cutting blade group 23 is formed as shown in FIG.

  In this embodiment, unlike the first embodiment, the clearance forming portions 28 and 128 are not formed by grinding on the respective cutting blades 22 and 122. Therefore, the number of sheets stacked on the retainers 21 and 121 in advance is as described above. It is assumed that the number of cutting blades 22 and 122 is set in anticipation of the clearance forming portion 28 to be pressurized and formed by the filler 70 later.

The present embodiment has the following characteristics in addition to the effect (1) of the first embodiment.
(1) In this embodiment, the filler 70 is interposed between the cutting blades 22 and 122, and the filler 70 contains solid particles 68, so that the compression is performed after the cutting blades 22 and 122 are stacked. By doing so, the thickness in the stacking direction of the cutting blades 22 and 122 can be managed. Management of the shear clearance L can be facilitated. Further, since the stacking error of the stacking can be managed by the pressurization and the solid particles 68, the stacking error can be reduced, and the cutting blade grinding cost for securing the shear clearance L can be reduced.

( Fourth embodiment: support of claim 4 )
A fourth embodiment will be described with reference to FIGS.
In the fourth embodiment, in the configuration of the first embodiment, instead of forming the clearance forming portions 28 and 128 of the cutting blades 22 and 122 by grinding, the clearance forming portion 28 as a thin film layer by surface treatment as a film treatment. , 128 is obtained. The clearance forming units 28 and 128 made of a thin film layer correspond to a first clearance management unit and a second clearance management unit.

In the surface treatment as the film treatment, CVD (Chemical Vapor Deposition), PVD (Physical Vapor Deposition), etc. can be mentioned, and as the film type, TiC (titanium carbide), TiN (titanium nitride), DLC (diamond-like carbon), CrN (chromium nitride), etc. can be applied.
18A to 18C, the clearance forming portions 28 and 128 are formed only on one side surface of the cutting blades 22 and 122, but may be formed on both side surfaces. Thus, the shear clearance L between the 1st roll 20 and the 2nd roll 40 is obtained by forming a thin film by surface treatment in parts other than the contact part which the cutting blades 22 and 122 mutually contact.

The fourth embodiment has the following features.
(1) In this embodiment, the clearance forming parts 28 and 128 (thin film layer) formed by the coating process are formed on the side surfaces of the cutting blade as the first clearance management part and the second clearance management part. As a result, by performing a film treatment on the side surface of the cutting edge, it is possible to secure and manage the shear clearance.

  In addition, when the clearance forming portions 28 and 128 are formed by grinding with respect to the cutting edges 22 and 122, since the processing is performed one by one, when the number of cutting edges is large, a lot of work grinding is required. According to the present embodiment, many processes can be performed at one time by performing the process by CVD or the like.

( Fifth embodiment: support of claim 5 )
A fifth embodiment will be described with reference to FIGS.
In the fifth embodiment, instead of forming the clearance forming portions 28 and 128 of the cutting blades 22 and 122 by grinding in the configuration of the first embodiment, the clearance forming portions 28 and 128 are formed on the side surfaces of the cutting blades 22 and 122. The difference from the first embodiment is that an elastic layer as an elastic body is formed or an elastic body is sandwiched independently of the cutting blades 22 and 122. The arrangement of the elastic body may be only one side of the cutting blade or both sides. As the elastic body, for example, SBR (styrene butadiene rubber), silicone rubber, natural rubber, foam, PET film and the like can be applied. Further, the elastic body may be one in which a pressure-sensitive adhesive is provided on one side or both sides thereof. For example, a double-sided tape in which a pressure-sensitive adhesive layer is provided on a commercially available elastic base material can be applied.

The clearance forming units 28 and 128 correspond to a first clearance management unit and a second clearance management unit.
(Operation of the fifth embodiment)
In this way, the clearance forming portions 28 and 128 are sandwiched between the cutting blades 22 and 122, and the elastic bodies (clearance forming portions 28 and 128) are allowed to have a tolerance between the cutting blades 22 and 122 by being strongly pressed by the collars 29 and 129. To absorb.

The fifth embodiment has the following features.
(1) The roll forming apparatus of the present embodiment is an elastic body disposed between the cutting edges 22 and 122 as a first clearance management section and a second clearance management section made of a material different from that of the cutting edges 22 and 122. As a result, by providing an elastic body between the cutting edges, a shear clearance can be secured and managed. Moreover, the variation (tolerance) of the thickness of a cutting blade can be absorbed by inserting an elastic body between cutting blades. Further, since the shear clearance can be formed and the tolerance of the cutting edge thickness can be relaxed, it is not necessary to form the clearance forming portion by turning, so that the cost of the cutting edge can be reduced. Further, it is not necessary to manage the set of cutting blades in the entire laminated state, and it is freed from the complexity of the management, and it is possible to reduce the number of assembling steps and the cost considering the tolerance of the cutting blade of the roll forming apparatus.

In addition, embodiment of this invention is not limited to the said embodiment, You may change as follows.
-You may use the retainer of the deformation | transformation aspect of 1st Embodiment and 1st Embodiment, respectively, combining.

And formation of the clearance forming portions 28, 128 by the use of fillers 70 of the third embodiment to the second embodiment, variation of the second embodiment, the fourth embodiment, except for the fifth embodiment, applicable to May be.

L ... shear clearance, 16 ... first rotating shaft, 18 ... second rotating shaft,
20 ... 1st roll, 22, 122 ... Cutting blade, 23, 123 ... Cutting blade group,
40 ... second roll, 42 ... first backup shaft, 45 ... second backup shaft,
68 ... solid particles, 70 ... fillers.

Claims (5)

A first roll and a second roll in which a plurality of cutting blades are stacked with respect to a first rotating shaft supported by a pair of first bearings and a second rotating shaft supported by a pair of second bearings, respectively. In a roll forming apparatus that fixedly supports and disposes and rolls the work by rotating both rolls by the rotation of the first rotating shaft and the second rotating shaft,
The first roll and the second roll are formed of a member different from the cutting blade or a material different from the cutting blade with respect to the plurality of cutting blades stacked on the first roll and the second roll, respectively. In addition, a first clearance management unit and a second clearance management unit for managing shear clearance are attached,
Each of the first clearance management unit and the second clearance management unit includes a plurality of management members that stack the plurality of cutting blades for each group and manage the thickness of the cutting blades for each group, or the plurality of the plurality of cutting blades. Each of the cutting blades is constituted by a single management member that manages by dividing into a plurality of stacked cutting blade groups.
A management member of the first clearance management unit is a first retainer that is fixed to be penetrated with respect to the first rotation shaft;
A management member of the second clearance management unit is a second retainer that is fixedly penetrating the second rotation shaft;
Ribs that restrict the movement of the cutting blade in the axial length direction are provided on the outer peripheral surfaces of the first retainer and the second retainer, and a cutting blade is attached to the outer periphery of the rib.
Or
Said first retainer and the second retainer a plurality, the retainer adjacent to each other have different outer diameters, said through-fixing of the retainer adjacent to each other is eccentric, and the retainer adjacent to each other A roll forming apparatus, wherein any one of shapes having different step portions is selected and the movement of the cutting blade in the axial length direction is restricted.   A plurality of first shims provided with a first clearance management unit, which is a member different from the cutting blade, attached to each cutting blade of the first rotating shaft and interposed between the first rotating shaft and the cutting blade. There are a plurality of second shims provided with a second clearance management portion, which is a member different from the cutting blade, attached to each cutting blade of the second rotating shaft and interposed between the second rotating shaft and the cutting blade. The roll forming apparatus according to claim 1, wherein the shear clearance is managed by the thickness of the first shim and the second shim.   The roll forming apparatus according to claim 1, wherein a filler is interposed between the cutting blades, and the filler contains solid particles.   2. The roll forming apparatus according to claim 1, wherein the first clearance management unit and the second clearance management unit are thin film layers formed on a side surface of a cutting blade by a coating process.   The roll forming apparatus according to claim 1, wherein the first clearance management unit and the second clearance management unit made of a material different from the cutting blade are elastic bodies disposed between the cutting blades.