JP6501060B2 - Rolling device - Google Patents

Description

  The present invention relates to a rolling apparatus for rolling a rolled body.

  Conventionally, in a rolling apparatus that manufactures a rolled product by rolling, a rolled product, which is a cylindrical rod-like body also called a blank, is formed of a plurality of rigid flat plates, rigid cylinders or rigid cylinders having a desired transfer shape on the surface. The rolled body rolls on the surface of the die member by relatively displacing the pair of die members while being held by the pair of die members which become the body or the rigid arc body, and the desired transfer is performed on the rolled body surface. The shape is generally formed by plastic deformation.

  As a reference, for example, a male screw body can be mentioned as a rolled body, and among them, a double screw body having a right screw portion and a left screw portion on the same region in the axial direction of the screw portion is known. An attempt has been made to produce this by rolling (Patent Document 1).

  According to Patent Document 1, by optimizing the shape of the parallelogram concave which is the strip portion of both screw bodies recessed in the die member, the shaft shape after rolling is relatively stable, and The striated portion can be formed with high accuracy.

JP, 2013-43183, A

  By the way, in the conventional rolling apparatus, in advance of rolling, a so-called shim such as a thin metal plate or paper is sandwiched between the die member and a block holding the die member, whereby the relative positions of the pair of die members are obtained. Adjustments have been made. Then, the test rolling is performed to check the rolling condition of the screw portion, and in the case of the adjustment failure, the device is stopped again to adjust the amount, thickness, and the like of the shim. Therefore, there is a problem that it takes a long time for adjustment time until stable mass production.

  In addition, even during mass production, the relative position of the pair of die members changes due to the change of the ambient temperature or the temperature change of the apparatus itself, and rolling defects may occur. At that time, it is necessary to repeat the test rolling while changing the amount and thickness of the shim, or to stop the operation of the rolling device as described above. As a result, in rolling using a conventional rolling apparatus, there is a problem that mass production efficiency is deteriorated.

  In particular, in recent years, there has been a demand for a rolling apparatus capable of mass production by making further precise rolling, as a specific example, easier preliminary adjustment or halfway adjustment of rolling of both screw bodies.

  An object of the present invention is to solve the problems as described above, that is, to provide a rolling apparatus capable of mass-producing highly accurate rolled products with simple adjustment.

A rolling apparatus according to the present invention for achieving the above object comprises a first holding mechanism for holding a first die member having a first surface provided with a desired rolling shape, and a rolling corresponding to the first surface. A second holding mechanism for holding a second die member having a second surface provided with a second shape, the first holding mechanism and the second holding mechanism comprising the first surface and the second surface And by moving them relative to each other while holding the rolled body between them, it is possible to form a desired rolled shape while rolling the rolled body. , in the direction of the relative movement, possess the resulting finely adjust the relative position of the first die member and the second die member, the position adjusting mechanism capable of holding a set position by the fine adjustment, the position The adjustment mechanism moves the first die member or the second die member in the rolling direction. And adjusting guide for the inner, along the adjustment guide, characterized in that it comprises an adjustment driving section for moving the first die member or said second die member.

  Furthermore, a position detection device that detects the relative position, and a control device that controls the amount of movement of the adjustment drive mechanism by the adjustment drive unit based on the detection result of the position detection device. I assume.

  Furthermore, the first die member is on the fixed side, and the second die member is on the moving side moved by a moving mechanism that moves the first holding mechanism and the second holding mechanism relative to each other, and the position adjustment guide is The first holding mechanism for holding the first die member is guided in the rolling direction.

  Furthermore, the first die member is on the fixed side, the second die member is on the moving side moved by a moving mechanism that moves the first holding mechanism and the second holding mechanism relative to each other, and the first holding mechanism is The first die member is held so as to be adjustable in position in the direction normal to the first surface, and the position adjustment guide is configured to move the first die member in the rolling direction with respect to the first holding mechanism. It is characterized by guiding.

  Furthermore, the first die member and the second die member form a substantially parallelogram in a direction normal to a virtual surface obtained by connecting the outermost portions of the surfaces to be rolled, and are recessed from the virtual surface The plurality of recesses provided may include a plurality of screw portion forming regions arranged in a plurality along the direction of relative displacement.

  Furthermore, in the first die member and the second die member, the arrangement pitch of the relative displacement direction of the recesses in the both screw portion forming regions is from the upstream side to the downstream side when the relative displacement with the screw material is made. It is characterized by having a region set smaller toward the end.

  According to the present invention, it is possible to save adjustment work at the time of rolling, to improve the operation efficiency, and to achieve an excellent effect of enabling mass production of highly accurate rolled products.

It is a figure which shows the outline | summary of the transfer method of the rolling apparatus based on embodiment of this invention, (A) is flat die rolling, (B) is rolling rolling, (C) is planetary rolling. . It is a top view of the same rolling apparatus which employ | adopted flat die rolling. (A) Right side view in the rolling part of the rolling apparatus, (B) Left side view, (C) It is CC sectional drawing of FIG. (A) is a front view showing a die member applied to the same rolling device, (B) is a side view, (C) is an exploded view. (A) is a front view explaining arrangement of a crevice of both screw part formation fields in the die member, (B) is a figure showing a deformation process of a screw material by the both screw part formation fields, (C) These are expanded sectional views which show the cross-sectional shape of the same recessed part. It is a front view explaining the arrangement pitch of the recessed part of the both screw part formation area in the same die member. (A) is a figure which shows the application example of rolling rolling, (B) is a figure which shows the application example of planetary rolling. (A) thru / or (C) is a side view showing the process of processing a screw material by the precursor processing field in the same die member. (A) is a side view showing a part of both screw bodies in an enlarged manner, (B) is a cross-sectional view showing the cross-sectional area of the highest crest portion of the screw thread in both screw regions; (C) both screw bodies Bottom view of FIG. (A) is a side view showing a part of both screw bodies in an enlarged manner, (B) is a cross sectional view showing a cross sectional area of a thread intersection of both screw regions, and (C) both screw bodies Bottom view of FIG. (A) is a front view and a side view showing another configuration example of the same die member, (B) is a side view showing an example of both screw bodies D rolled thereby, (C) and (C) D) is a front view which shows the other structural example of the screw material B. [FIG. It is a top view which shows the other structural example of the rolling apparatus. It is a top view which shows the other structural example of the rolling apparatus. (A) is a top view which shows the other structural example of the rolling apparatus, (B) is a right view, (C) is a left view, (D) is DD of (A). It is an arrow sectional view, (E) is an EE arrow sectional view of (A).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

  First, a rolling apparatus according to an embodiment of the present invention will be described. As a type of rolling apparatus to which the present invention can be applied, a so-called flat die rolling apparatus using two plate-shaped first die members 132 shown in FIG. 1 (A) or FIG. 1 (B) A so-called rolling roll forming apparatus using two or more cylindrical or cylindrical round die members 132 and 142 in combination, one shown in FIG. 1 (C), an arc-shaped die member 132 and the other being a cylindrical or cylindrical die There is a so-called planetary rolling device or the like which is rolled by using the round die member 142. Hereinafter, the flat die structure rolling apparatus will be specifically described in the present embodiment, but the present invention can be applied to any other rolling apparatus not exemplified.

  As shown in FIG. 2, the rolling apparatus 100 includes a base 110, a material supply unit 120, a rolling unit 130, a drive unit 150, and a position adjustment unit 170. The base 110 is a member for supporting the rolling portion 130, the position adjusting portion 170, etc. in a predetermined inclined state, specifically, in an inclined state such that the upper side is high and the lower side is low in FIG. An oil pan 108 is disposed. Of course, such a height difference is not essential.

  The material supply unit 120 supplies the screw material B, which is a rolled body, to the rolling unit 130 one by one. The material supply unit 120 includes a vibrating parts feeder 122 in which a screw material B is accumulated, a guide rail 124 that slides and guides the screw material B supplied from the vibrating parts feeder 122, and a lower end of the guide rail 124. , The pusher 126 which pushes out the screw material B to the rolling part 130 one by one.

  The rolling unit 130 holds the first die member 132 on the stationary side, the second die member 142 on the moving side, the first holding mechanism 134 for holding the first die member 132, and the second die member 142. And a support rail 149 for obtaining a reaction force against the rolling pressure while slidably guiding the second holding mechanism in the rolling direction X.

  The first die member 132 and the second die member 142 are disposed to face each other at an interval in the rolling width direction W which is perpendicular to the rolling direction X. Rolled asperities corresponding to each other on the mutually opposite rolling surfaces 132A and 142A, for rolling deformation of the rolled material to a desired rolling shape, that is, the transfer shape for plastic deformation to a transfer shape Is formed. The structure of rolled unevenness will be described in detail later.

  The first holding mechanism 134 has a receiving recess 135 for receiving the first die member 132, and fixes the first die member 132 in the receiving recess 135. Specifically, in the first holding mechanism 134, a holding member 136 for holding the first die member 132 from the upper surface side by using the fixing bolt 136A, and a surface (rear surface) opposite to the rolling surface 132A of the first die member 132. Of the first die member 132 and a rolling direction fixing bolt 138 for holding one side (side surface) opposite to the rolling direction X of the first die member 132. Therefore, when the protrusion adjustment bolt 137 is tightened, the rolling surface 132A of the first die member 132 approaches the second die member 142. When the rolling direction fixing bolt 138 is tightened, the first die member 123 is pressed and fixed to the side surface (rolling direction positioning surface) 135A of the accommodation recess 135. At this time, a shim or paper may be inserted between the first die member 132 and the side surface 135A to finely adjust the position in the rolling direction X of the first die member 132, but as will be described later, this embodiment In the embodiment, since the position adjustment unit 170 is provided, adjustment using a shim or the like can be made unnecessary in principle. The first die member 132 is pressed against the upper surface of the first die member 132 by the fixing bolt 136A in a state where the first die member 132 is positioned by the projection amount adjustment bolt 137 and the rolling direction fixing bolt 138 132 is complete.

  The second holding mechanism 144 has a receiving recess 145 for receiving the second die member 142, and fixes the second die member 142 in the receiving recess 145. Specifically, the second holding mechanism 144 has a holding member 146 for holding the second die member 142 containing the holding recess 145 from the upper surface side using the fixing bolt 146A. By holding the holding member 146 against the upper surface of the second die member 142 by the fixing bolt 146A, the holding of the second die member 142 is completed.

  The support rail 149 has a sliding surface 146A that holds the back surface 144A of the second holding mechanism 144. Therefore, the support rail 149 receives the force (the reaction force at the time of rolling) which the second holding mechanism 144 receives from the second die member 142 at the time of rolling, at the sliding surface 146A. The support rail 149 also includes an upper rail 147 for holding the upper surface of the second holding mechanism 144. When the second holding mechanism 144 reciprocates in the rolling direction, the second holding mechanism 144 moves in the vertical direction. Regulate not to move.

  The drive unit 150 includes a drive source 152 and a movement mechanism 160 that reciprocates the second holding mechanism 144 in the rolling direction X using the drive source 152. The drive source 152 has a motor (not shown) and a belt 154 and a pulley 156 for transmitting the rotation of the motor to the cycle mechanism 160. Of course, these configurations are not essential and are not particularly limited as long as the movable second holding mechanism 144 is configured to be drivable.

  The cycle mechanism 160 includes a flywheel 162 to which the rotation of the pulley 156 is transmitted, a crankshaft 164 disposed at an eccentric position of the flywheel 162, a crank pin 166 disposed on the second holding mechanism 144 side, and a crank It has a connecting member 168 which connects the shaft 162 and the crank pin 166. As a result, when the crankshaft 164 revolves by the flywheel 162, the second holding mechanism 144 linearly reciprocates in the rolling direction X by the crank mechanism using the connecting member 168. As a result, the first die member 132 and the second die member 142 move relative to each other in the rolling direction X in a state in which the screw shaft B is held, and the screw portion is rolled and formed.

  The position adjustment unit 170 has a controller 172 and a position adjustment mechanism 180. As shown in an enlarged manner in FIG. 3, the position adjustment mechanism 180 is disposed on the slider portion 182 formed on the bottom surface of the first holding mechanism 134 and the base 110 and guides the slider portion 182 in the rolling direction X It has adjustment guide 184 and adjustment drive part 186 which is arranged on base 110 and moves first holding mechanism 134 (slider part 182) in rolling direction X. Here, the adjustment drive unit 186 employs a hydraulic cylinder using a hydraulic servo, and its moving shaft is connected and fixed to the first holding mechanism 134.

  Furthermore, the adjustment drive unit 186 includes a position detection device (not shown). As this position detection device, for example, a digital length measurement sensor or the like built in the adjustment drive unit (hydraulic cylinder) 186 can be used. The resolution is preferably, for example, 100 μm or less, preferably 10 μm or less, and more preferably 2 μm or less. Positioning can be performed with these resolutions.

  The controller 172 incorporates a CPU, a ROM, a RAM, etc., and executes a predetermined program by the CPU to refer to data detected by the position detection device based on an external input signal (not shown). Then, the adjustment drive unit 186 is controlled. As a result, the position of the first holding mechanism 134 is adjusted in the rolling direction X with high resolution. For example, when an input signal for moving 5 μm downstream (or moving upstream) is received, the adjustment drive unit 186 is feedback-controlled with reference to data detected by the position detection device, and the first holding mechanism 134 is 5 μm. Move downstream (or upstream).

  As described above, rolling is performed by adjusting the position of the first holding mechanism 134 in the rolling direction X with high accuracy by the position adjustment unit 170 without disassembling the first die member 132 and the first holding mechanism 134. Even during operation of the apparatus 100, the relative position between the first die member 132 and the second die member 142 in the rolling direction X can be finely adjusted.

  Next, the die structure of the rolled surfaces 132A and 142A of the first and second die members 132 and 142 will be described in detail. In addition, since both die | dye structures are common, only the die | dye structure of the rolling surface 132A of the 1st die member 132 is demonstrated here, and others are abbreviate | omitted. The structure and shape of the die member in the present invention are not particularly limited.

  The rolling die structure of the rolling surface 132A of the present embodiment is for manufacturing both screw bodies as shown in FIG. 4 and is provided with a desired transfer shape (a rolling unevenness corresponding to the shape). It has a rigid surface 20. The rigid surface 20 is relatively displaced while being pressed against the screw material B. Therefore, the rigid surface 20 deforms the surface of the screw material B while being relatively displaced in a direction orthogonal to the axial direction of the screw material B, and both the right screw portion and the left screw portion are on the same region in the axial direction. It is possible to roll the screw body.

  As shown in FIG. 4A, the rigid surface 20 of the first die member 132 is a recess in the virtual surface 22 obtained by connecting the outermost portions of this rigid surface 20 (the portion closest to the screw material B). A plurality of screw portion forming areas U are provided, in which a plurality of 30 are provided independently in alignment. The concave portions 30 in the both screw portion forming area U have a substantially parallelogram in a normal direction view, and are recessed from the virtual surface 22 as shown in FIG. 4 (B). Here, the imaginary surface 22 is planar in the case of the plate-like first die member 132, cylindrical in the case of a circular die, and partially cylindrical (in the case of an arcuate die). It is desirable to set it to the

  Each concave portion 30 is formed in a substantially parallelogram shape in a normal direction view of the virtual plane 22, and preferably in a substantially rhombus shape. In this manner, when it is set to a substantially rhombic shape, it is possible to make the thread pitches of the right screw portion and the left screw portion of the two screw bodies D to be rolled equal to each other.

  As shown in FIG. 5 (A), these concave portions 30 are formed so that two or more corner portions 31, 31 of the substantially parallelogram-shaped four-corner corresponding portions in the normal direction look as shown in FIG. Be done. In the present embodiment, all corner portions 31, 31, 32, 32 of the substantially parallelogram-shaped four-corner corresponding portion are formed round. In addition, it is preferable to set these two or more corner parts 31 and 31 in the mutually diagonal position form, and, in particular, the rolling direction of the screw material B in the two or more corner parts 31, 31, ie, relative displacement By setting the diagonal position in the direction of 3, it is possible to suppress the generation of cuttings at the time of rolling, and it is preferable that the generated cuttings easily flow out of the recess 30 at the time of relative displacement.

  Further, the recess 30 is in the form of a virtual substantially quadrangular pyramid-shaped hole having the opening surface as one constituent surface, and the central apex of the substantially quadrangular pyramid shape constitutes the deepest portion 34 of the recess 30. . More preferably, the deepest portion 34 of the recess 30 is shaped so as to have a substantially flat bottom 35. By doing this, the bottom portion 35 becomes wide, and it becomes easy for the generated cuttings to flow out without being clogged, and the highest apex of the thread M of both screw bodies D does not form an acute angle in the direction perpendicular to the axis of both screw bodies D Thus, the stability at the time of screwing the female screw body to both screw bodies D can be improved. In addition, the product accuracy of both screw bodies D obtained by mass production can be significantly improved.

  As shown in FIG. 5A, the arrangement pitches T1, T2, T3... In the direction of relative displacement of the concave portions 30 in the both screw portion forming regions U from the upstream side at the time of relative displacement with the screw material B Set smaller towards the side. That is, T1> T2> T3>. As shown in FIG. 5 (B), when the screw material B is rolled from upstream to downstream on the both screw portion forming regions U, the shaft portion E excluding the screw thread M is gradually formed. The outer peripheral distance of the shaft portion E (diameter x π when assuming a true circle) becomes gradually smaller toward the downstream, and finally becomes a substantially regular circle shape. Therefore, the rolling distance that is traveled by one rotation of the screw material B also gradually decreases toward the downstream, and accordingly, the arrangement pitches T1, T2, T3... If it is set small, it is possible to press the recess 30 in the same phase at all times with respect to the rolling screw material B, and the shape accuracy of the screw thread M can be remarkably enhanced. Here, although the case where the arrangement pitches T1, T2, T3... Gradually decrease over the entire area of both screw portion forming areas U is illustrated, the arrangement is limited to a partial area in the relative displacement direction. The pitches T1, T2, T3... May be gradually reduced.

  As shown in FIG. 5B, during rolling using the rolling die structure, the distances L1, L2, L3 ··· between the axial center E1 of the screw material B and the virtual surface 22 in the double-screw portion forming region U. It is preferable to decrease the size of the screw material B from the upstream side to the downstream side where the screw material B is relatively displaced. That is, L1> L2> L3>. In this way, the screw material B can be compressed so that the diameter of the shaft portion E of the screw material B becomes gradually smaller toward the downstream, so the arrangement pitch T1, T2 in the direction of relative displacement of the recesses 30 The shape accuracy of the thread M can be further enhanced by the synergetic effect of reducing T 3.

  Although FIG. 5A exemplifies the case where the maximum dimension W in the direction of relative displacement is constant with respect to all the recesses 30, for example, as shown in FIG. It is also preferable to set the maximum dimensions W1, W2, W3 ... of the plurality of recesses 30 in the relative displacement direction to be gradually smaller in the order from the upstream side toward the downstream side. That is, W1> W2> W3>. The final shape of the thread M approximates the recess 30 on the most downstream side of the both thread forming regions U. On the other hand, on the upstream side, the arrangement pitches T1, T2, T3... Are larger than the most downstream side, so there is room for space, so the same maximum dimensions W1, W2, W3. It can be set. The larger the same maximum dimensions W1, W2, W3 ... of the recess 30, the plastic deformation amount of the screw material B can be increased. As it progresses to the side, it is possible to perform rolling so as to approach the shape of the final thread M.

  As shown in FIG. 5C, in the cross-sectional shape along the normal direction of the virtual surface 22, these recesses 30 are formed such that their peripheral edge 33 is rounded, for example, as in R processing, so as to have a substantially parallelogram shape Are formed round along the circumference of the peripheral edge 33 which In this manner, by rounding the peripheral edge 33 of the recess 30 over the circumference of the peripheral edge 33, the screw material B is scraped off due to an unreasonable contact between the surface of the first die member 132 and the screw material B during rolling. It becomes possible to prevent the generation of a cutter which is released and generated. The present invention is not limited to this. For example, as shown in FIG. 5D, it may be trapezoidal or V-shaped.

As shown in FIG. 5A, when viewed in the normal direction of the virtual surface 22, the recess 30 having a substantially parallelogram shape has a diagonal distance W of at least one of its diagonals, a radius R of the screw material B, and a circumference When the rate is π, it is set to be 2πR 0 or less. Preferably, when the valley diameter of both screw bodies D obtained by the practice of the present invention is d _R (see FIG. 9), the diagonal distance W of at least one of the diagonals of the substantially parallelogram forming the recess 30 is πd _{It is} less than _R. More preferably, of the diagonal lines of the substantially parallelogram forming the recess 30, the diagonal distance of at least the diagonal line parallel to the relative displacement direction is set to π d _R or less. By setting in this manner, it is possible to set the thread pitches of the right screw portion and the left screw portion equally, and to obtain both screw bodies D with high accuracy.

Further, as shown in FIG. 5A, the opening of the recess 30 has a relatively long diagonal distance of one of the substantially parallelograms in the normal direction of the virtual surface 22, preferably a relatively long diagonal distance W in the relative displacement direction. The other diagonal distance, preferably the diagonal distance F in the direction orthogonal to the relative displacement direction, is set relatively short. The concave portion 30 has a volume v of the concave portion 30, a pi of π, a concave pitch of the concave portion 30 in a direction perpendicular to the direction of the relative displacement of the first die member 132, and a valley diameter of both screw bodies D Where d _R (see FIG. 9) and the depth of the deepest part 34 of the recess 30 is h, the setting range of the volume v of each recess 30 is πpd _R h / 7 ≦ v ≦ πpd _R h / 5 Preferably, it is configured as specified. If it is set smaller than this range, the screw thread M becomes too thin, becomes too small, and lacks in strength, or when the female screw body is screwed to both screw bodies D which are male threads obtained by the practice of the present invention The play gets too big and the rattling gets too big. Conversely, if it is set larger than this range, the screw thread M becomes too fat or too large, and the play becomes smaller when the female screw body is screwed to both screw bodies D which are male threads obtained by the practice of the present invention It becomes too difficult to screw or can not be screwed, or it becomes difficult to roll thread M with high accuracy.

  Therefore, when changing the size of the recess 30 as shown in FIG. 6, it is preferable to change within the range satisfying the condition of the volume v.

  By rolling using the first die member 132 of the rolling die structure of both screw bodies D described above, it becomes possible to efficiently mass-produce both screw bodies D with high accuracy.

  The rigid surface of the die member has a precursor processed area in the virtual surface 22 obtained by connecting the outermost portions (the portions closest to the screw material B) of the rigid surface. The precursor processing area is for processing into a precursor cross-sectional shape (hereinafter referred to as a substantially oval shape) such as an oval cross-sectional shape or an oval cross-sectional shape, for example. In the part formation area U, it is for forming the precursor shape for making it easy to form both screw parts. In particular, the rigid surface 20 of the first die member 132 for processing the precursor cross-sectional shape into a substantially elliptical shape has a precursor processed area Q on the virtual surface 22 as shown in FIG. 4 (A).

  As shown in FIG. 8, the precursor machining area Q gradually approaches the axis E1 of the screw material B while maintaining the surface state itself along the direction of relative displacement with the screw material B. An approaching area Q1 and a separating area Q2 gradually separating from the axial center E1 are repeated. Therefore, as shown in FIG. 8 (A), the process in which the screw material B, which is initially in a circular cross-sectional shape, is compressed in the approach area Q1 is repeated in the same phase, finally, FIG. As shown, the cross section is non-circular with a major axis and a minor axis. Although the case where the approach area Q1 and the separation area Q2 are curved is illustrated here, the present invention is not limited to this. For example, as shown in FIG. 8D, it may be a concavo-convex having a trapezoidal cross section, or it may be a saw-tooth like concavo-convex.

  As shown in FIG. 4A, at least a part of the precursor processing region Q in the first die member 132 exists on the upstream side when the screw material B is relatively displaced with respect to the both screw portion forming regions U. . Desirably, the precursor processing area Q and the both thread forming areas U are independently arranged. In this way, it is possible to deform the screw material B into a substantially elliptical shape in the precursor processing region Q in advance before the screw material B enters the both screw portion forming regions U. Of course, a part or all of the precursor processing area Q may overlap with both the screw portion forming areas U. In the case of overlapping, while screw material B is elliptically machined, a thread is also formed at the same time.

  The deformation pitch between the approach area Q1 and the separation area Q2 in the precursor processing area Q with respect to the arrangement pitch PU of the plurality of recesses 30 arranged on a straight line along the direction of relative displacement in both screw forming areas U PQ is set to its integer multiple, here four. In addition, since the parallelogram is arrange | positioned in the diagonal lattice form of the recessed part 30, the grid pitch PX of the several recessed part 30 arrange | positioned in zigzag form is half of arrangement pitch PU of the recessed part 30 arrange | positioned on a straight line Become one. Further, the phase of the deformation pitch PQ and the phase of the arrangement pitch PU coincide with each other between the precursor processing area Q and the two screw portion forming areas U adjacent thereto. In this way, rolling of the screw material B from the precursor processing region Q to the both screw portion forming regions U is smoothly performed.

  As shown in FIGS. 9 (B) and 10 (B), a pair of screws having a phase difference of 180 ° as a feature of both screw regions formed by overlapping a right screw and a left screw in both screw bodies D. The total cross-sectional area S1 (see FIG. 9B) of only the thread M at the top of the peaks M and M and the threads M and M cross each other with a 90 ° offset in the circumferential direction with respect to the top It is mentioned that the total cross-sectional area S2 (see FIG. 10 (B)) of only the thread M of the crossing portion which is being made differs significantly. That is, while rolling of both screw bodies D deforms the screw material B so that the shaft portion E approximates a normal circle, the thread M around it has a volume in the vicinity of the highest peak and 90 It must be rolled in such a way that the volumes in the vicinity of the intersection that is shifted are different. Therefore, if the thread material B is temporarily rolled as it is with the thread material forming area U, the screw material B near the intersection is reduced and the screw material B near the top is thickened. Depending on the material of the screw material B, the flow of such a material may be difficult.

  Therefore, as in the present embodiment, in the precursor processing region Q upstream of the both screw portion forming regions U, the screw material B has a long axis where a possible top of the thread M in the future is By deforming into a substantially elliptical shape whose minor axis is a place where the thread M can cross, the amount of plastic deformation of the screw material B can be reduced in the both screw portion forming regions U. Moreover, the precursor processing area Q and the both screw portion forming area U are integrally disposed in the first die member 132, and the deformation pitch PQ (the pitch of the short axis and the long axis) of the precursor processing area Q, The phases of the pitches (quarter of the arrangement pitch PU) of the highest crests and the intersections of the thread in the both-screw formation regions U are made to coincide. As a result, it is possible to roll with extremely high accuracy both thread areas with extremely high work efficiency by collectively performing the oval or oval processing and thread machining in a series of rolling operations. .

  As shown to FIG. 4 (A), the rigid surface 20 of the 1st die member 132 is the single screw part formation area | region adjacently arranged in the state shifted to the axial direction of the thread material B with respect to both screw part formation area U. It has J. A valley portion 50 extending in a band shape with respect to the virtual surface 22 is recessed in the one-side screw portion forming region J, and the valley portion 50 makes a single-screw region of both screw bodies D in FIGS. Roll thread. The valleys 50 may be inclined as much as the lead angle with respect to the direction in which the screw material B is relatively displaced. If the screw material B is disposed and rolled so as to straddle both the screw part forming area U and the one-piece screw part forming area J, one piece is formed by the one-piece screw part forming area J as shown in FIGS. It is possible to obtain a double-threaded body D in which the threaded region is formed and both threaded regions are formed by the double-threaded region U.

  As shown in FIG. 4C, the first die member 132 can be divided as a component at the boundary between the both screw portion forming region U and the one-side screw portion forming region J. Both screw bodies D need to change the length of the single screw region according to the specification. If the first die member 132 is made dividable, the length of the single screw region of both screw bodies D can be easily changed by replacing the part corresponding to the single screw portion forming region J with one having a different axial width. You can change Further, since both screw portion forming regions U can be easily replaced as parts, the shape of the thread M in both screw portion forming regions U can be changed, or both screw portion forming regions U and one screw portion forming region J can be changed. It is possible to flexibly cope with various variations, such as exchanging the axial arrangement, and further arranging both screw portion forming regions U on both sides of the single screw portion forming region J. In general, if the axial dimension of both screw portion forming regions U is set to be large with a margin, it can correspond to both screw regions of any length.

  Here, the first die member 132 can be divided into three component pieces J1, J2, and J3 at the boundary in the axial direction in the single screw portion forming region J. In this case, a large number of component pieces each having an axial width of 5 mm, for example, are prepared, and the axial width of the single screw portion forming area J can be freely adjusted in 5 mm units depending on the number of connected component pieces. It is also possible to apply this concept to both screw formation regions U.

  As shown to FIG. 4 (A), the rigid surface 20 of the 1st die member 132 is a planar cylinder adjacently arranged in the state shifted to the axial direction of the screw material B with respect to the single-screw part formation area J. A portion forming region K (which may be a cylinder) is provided. The cylindrical portion forming region K may be formed by rolling the cylindrical regions of both screw bodies D in FIGS. 9 and 10, and the flat cylindrical portion forming region K is configured not to touch the screw material B. It is good also as a cylindrical part by leaving an appropriate cylindrical field of original screw material B by leaving. As shown in FIG. 4C, the boundary between the cylindrical portion forming region K and the one-side screw portion forming region J can be divided. In the both screw bodies D, it is necessary to change the length of the cylindrical region according to the specification. If division is possible in this way, the length of the cylindrical region of both screw bodies D can be easily changed by replacing the first die member 132 with one having a different axial width by the part corresponding to the cylindrical portion forming region K. Can be changed.

  Although not particularly illustrated here, the first die member 132 may be further divided as a component piece at the boundary in the axial direction in the cylindrical portion formation region K. In this case, for example, a large number of component pieces in the cylindrical portion forming region K having an axial width of 5 mm are prepared, and the axial width of the cylindrical portion forming region K can be freely adjusted in 5 mm units depending on the number of connected pieces. Can be adjusted.

  In the rolling method of both screw bodies D using the rolling device 100 of the present embodiment, while pressing against the cylindrical screw material B, while relatively displacing in the direction orthogonal to the axial direction of the screw material B. The screw material B surface is deformed to roll the two screw bodies D having the right screw portion and the left screw portion on the same region in the axial direction.

  When rolling using the plate-like first die member 132 and the second die member 142 as in this embodiment, one of the first die members 132 is fixed as shown in FIG. On the other hand, the other second die member 142 is disposed such that the distance between the outermost surfaces is a predetermined distance d, and the other second die member 122 is relatively displaced while maintaining this distance d. Of course, these first and second die members 132 and 142 need only be relatively displaced, and both may be configured to be displaced in alternate directions, the distance d is not constant, and The first and second die members 132 and 142 may be arranged to be inclined.

  The rolling apparatus 100 of the present embodiment includes a position adjusting mechanism 180 that adjusts the relative position of the first die member 132 and the second die member 142 in the rolling direction X. Therefore, even if the relative positions of the first die member 132 and the second die member 142 change due to thermal expansion due to temperature change around the rolling apparatus 100 or temperature change of the rolling apparatus 100 itself, the first The relative position of the die member 132 and the second die member 142 can be finely adjusted. Therefore, the relative positions of the first die member 132 and the second die member 142 can be finely adjusted without stopping the operation of the rolling apparatus 100 while confirming the state of the mass-produced screw bodies D. As a result, it is possible to mass-produce both screw bodies D with high precision at high yield.

  In particular, as shown in the present embodiment, when the first and second die members 132 and 134 adopt a die structure for manufacturing both screw bodies D, the recessed portions 30 are periodically formed in the rolling direction on the rolling surface. Be placed. Therefore, when the relative position of the first die member 132 and the second die member 142 is slightly deviated, the rolling timing (rolling cycle) with respect to the screw material B by the concave portion 30 is the first die member 132 and the second die. The member 142 shifts. As a result, the shape of the screw thread M collapses, which greatly affects the completion accuracy of both screw bodies D. Therefore, as in the rolling apparatus 100 according to the present embodiment, the adjustment driving unit 186 is used to enable real-time fine adjustment of 100 μm or less, while constantly monitoring the completion degree of the thread M. The relative position of the first die member 132 and the second die member 142 can be adjusted and optimized. Therefore, the setting time before mass production performed while repeating trial production can be shortened significantly, and fine adjustment during mass production can be freely made.

  Further, in the full-rolling apparatus 100, the position adjustment mechanism 180 moves the first die member 132 along the adjustment guide 184 for guiding the fixed first die member 132 in the rolling direction X, and the adjustment guide 184. And an adjusting drive unit 186 for adjusting the voltage. Therefore, by positively adjusting the first die member 132 on the fixed side, the relative position of the first die member 132 and the second die member 142 can be adjusted without complicating the rolling apparatus 100 itself. Furthermore, in the rolling apparatus 100, the relative position can be automatically controlled by the control device 172 based on the detection result of the position detection device incorporated in the adjustment drive unit 186. Therefore, if the user inputs a control target value (movement amount) to the control device 172, the relative positions of the first die member 132 and the second die member 142 can be obtained even while the rolling apparatus 100 is in operation. You can change it.・

  In the rolling apparatus 100 of this embodiment, as shown in FIGS. 4A and 5A, the arrangement pitches T1, T2, T3,... · · · · · · · From the upstream side to the downstream side when relative displacement with the screw material B. That is, T1> T2> T3>. As shown in FIG. 5B, when the screw material B is rolled from the upstream to the downstream on the both screw portion forming area U, the shaft portion E excluding the screw thread M is gradually formed. The outer peripheral distance of the shaft portion E (diameter x π when assuming a true circle) becomes gradually smaller toward the downstream, and finally becomes a substantially regular circle shape. Therefore, the rolling distance that is traveled by one rotation of the screw material B also gradually decreases toward the downstream, and accordingly, the arrangement pitches T1, T2, T3... If it is set so as to become smaller toward the downstream, it becomes possible to press the recess 30 with almost the same phase against the screw material B during rolling, and the shape accuracy of the screw thread M is significantly enhanced. I can do it.

  As shown in FIG. 5 (B), in the both screw portion forming area U, the screw material B relatively displaces the distance L1, L2, L3... Between the central axis E1 of the screw material B and the imaginary surface 22 It can also be smaller from the side to the downstream side. In that case, the virtual surfaces 22 of the pair of opposing first die members 132 may be made non-parallel and the distance between them may be set so as to gradually decrease in the advancing direction of rolling of the screw material B.

  Furthermore, as shown in FIG. 6, the maximum dimensions W1, W2, W3... In the direction of relative displacement of the plurality of recesses 30 in both screw portion forming regions U gradually decrease in the order of arrangement from upstream to downstream It can also be set as That is, W1> W2> W3>. The final shape of the thread M approximates the recess 30 on the most downstream side of the both thread forming regions U. On the other hand, on the upstream side, the arrangement pitches T1, T2, T3... Are larger than the most downstream side, so there is room for space, so the same maximum dimensions W1, W2, W3. it can. The larger the same maximum dimensions W1, W2, W3 ... of the recess 30, the plastic deformation amount of the screw material B can be increased. As it progresses to the side, it is possible to perform rolling so as to approach the shape of the final thread M.

  As shown in FIG. 1 (B), in the case of so-called rolling rolling using two or more round die members 12, 12 of cylindrical or cylindrical shape, the two round die members 12, 12 are The rotation axes are parallel to each other, and the distance between the outermost surfaces is maintained at a predetermined distance d. And while holding this interval d, it is made rotatable. At this time, the respective round die members 12 and 12 may rotate in the opposite direction or in the same direction.

  Even in the case of using this round die member 12, in the both screw portion forming area U, the distance L1, L2, L3... Between the central axis E1 of the screw material B and the virtual surface 22 It can be made smaller from the side to the downstream side. In that case, as shown in FIG. 7A, the distance X1, X2, X3... From the central axis E1 of at least one of the round die members 12 to the virtual surface 22 gradually increases as it proceeds in the circumferential direction So as to displace. As a result, the distance between the pair of opposing virtual surfaces 22 gradually decreases in the rolling direction of the screw material B.

  Further, as shown in FIG. 1C, in the case of rolling of a so-called planetary type in which one is an arc-shaped die member 132 and the other is rolling using a cylindrical or cylindrical round die member 142. The circular die member 132 is fixed, and the other round die member 142 is rotatably held so that the distance between the outermost portions is a predetermined distance d. Then, while maintaining the distance d, the rigid surfaces 20 are disposed so as to be relatively displaceable.

  Even in the case of using this arc-shaped die member 132, the screw material B relatively displaces the distances L1, L2, L3, ... between the central axis E1 of the screw material B and the imaginary surface 22 in both screw portion forming regions U. It can be made smaller from the upstream side to the downstream side. In that case, as shown in FIG. 7B, the distances Y1 and Y2 between the virtual surface 22 on the inner circumferential side of the arc-shaped die member 132 and the central axis E1 of the cylindrical die member 142 on the opposite side. , Y3... So that they gradually become smaller as they move in the circumferential direction. As a result, the distance to the virtual surface 22 of the opposing cylindrical die member 142 gradually decreases in the rolling direction of the screw material B.

  Further, according to the present embodiment, as shown in FIG. 4A, the screw material B can be processed into an elliptical shape or an oval shape by using the precursor processing region Q of the first die member 132.

  More specifically, before the screw material B is made to enter the both screw portion forming areas U, the screw material B is deformed in advance into a substantially elliptical shape.

  At that time, in the precursor processing area Q on the upstream side of both screw part forming areas U, the screw material B is taken as a major top of the future thread M as a long axis, and the intersection of the future threads M It deforms into a substantially elliptical shape so that the place where it can become is a short axis. As a result, the plastic deformation amount of the screw material B can be reduced in the both screw portion forming regions U. Moreover, the precursor processing area Q and the both screw portion forming area U are integrally disposed on the first die member 132 and / or the second die member 142, and the deformation pitch PQ of the precursor processing area Q (short axis And a long axis) and a series of rolling operations while making the phases of the pitch (a quarter of the array pitch PU) of the highest crest and intersection of the screw threads in both screw part forming regions U coincide with each other Perform shaping or oval machining and thread machining together. As a result, it is possible to roll both screw areas with extremely high accuracy with extremely high work efficiency.

  As shown to FIG. 4 (A), the rigid surface 20 of the 1st die member 132 and / or the 2nd die member 142 adjoins in the state shifted to the axial direction of the thread material B with respect to both screw part formation area U It is possible to provide a one-piece thread forming area J to be disposed. A valley portion 50 extending in a band shape with respect to the virtual surface 22 is recessed in the one-side screw portion forming region J, and the valley portion 50 makes a single-screw region of both screw bodies D in FIGS. Roll thread. The valleys 50 may be inclined as much as the lead angle with respect to the direction in which the screw material B is relatively displaced. If the screw material B is disposed and rolled so as to straddle both the screw part forming area U and the one-piece screw part forming area J, one piece is formed by the one-piece screw part forming area J as shown in FIGS. It is possible to obtain a double-threaded body D in which the threaded region is formed and both threaded regions are formed by the double-threaded region U.

  Furthermore, in the rolling apparatus 100 according to the present embodiment, as shown in FIG. 4C, the first die member 132 and / or the second die member 142 has the both-screw portion forming region U and the one-screw portion forming region It is possible to divide as a part at the boundary of J. If the first die member 132 or the second die member 142 is made dividable, replacement of the parts corresponding to the single screw portion forming area J with parts having different axial widths can be easily achieved. The length of the single screw region can be changed.

  The first die member 132 and / or the second die member 142 can be divided into three pieces J1, J2, and J3 at the boundary in the axial direction in the one-screw portion forming region J, so that The axial direction width of the one-side screw portion forming region J can be freely adjusted by the number of connections of these component pieces. It is also possible to apply this concept to both screw formation regions U.

  In the rolling apparatus 100 of the present embodiment, as shown in FIG. 4C, the boundary between the cylindrical portion forming region K and the one-side screw portion forming region J can be divided. In the double screw body D, it is necessary to change the length of the cylinder (or cylinder) area according to the specification. If division is possible in this way, both of the first die member 132 and / or the second die member 142 can be easily replaced by replacing the parts corresponding to the cylindrical portion forming area K with different axial widths. The length of the cylindrical region of the screw body D can be changed.

  As a modification of the above embodiment, for example, a rolling die structure shown in FIG. In this rolling die structure, the spacer area SP is disposed between the both screw forming area U and the one-screw forming area J on the rigid surface 20 of the first die member 132 and / or the second die member 142. . The spacer region SP is set to a protrusion amount corresponding to the valley diameter of the two screw bodies D to be rolled, so that some of the boundary portion between the two screw portion forming region U and the one screw portion forming region J is It plays a role of forming a play space. Thus, as shown in FIG. 11B, a narrow portion V having a minute width as a valley diameter is formed between both screw areas and one screw area of both screw bodies D after rolling. Since the pitches of both screws and one screw are matched, the thread transition between the one screw region and both screw regions can be smoothly performed.

  In addition, although the case where spacer area | region SP is arrange | positioned between the both screw part formation area U and the one-piece | screw part formation area J was illustrated here, the precursor processing area Q of the 1st die member 132 and / or the 2nd die member 142 is illustrated. In (see FIG. 4), it is also preferable to dispose the spacer area SP at the boundary corresponding to the both screw part forming area U and the one-screw part forming area J. Thus, as shown in FIG. 11C, the neck portion V is formed on a so-called precursor (this precursor can also be defined as a part of the screw material) in a state in which the screw material B passes through the precursor processing region Q. Can be formed. As a result, even if there is no spacer area at the boundary between both the screw part forming area U and the one screw part forming area J after that, rolling is smoothed by the presence of the constricted part V. In addition to forming the constriction V by the spacer region SP of the first die member 132 and the second die member 142, the screw material B itself supplied to the first die member 132 and the second die member 142 is preprocessed. It is also possible to form the constriction V in advance.

  Moreover, although the case where the screw material B becomes the same cross-sectional area over both the screw part formation area U and the single screw part formation area J in the die structure is illustrated in the above embodiment, the present invention is not limited thereto. It is not limited to. For example, as shown in FIG. 11C, in comparison with the cross-sectional area of the screw thread corresponding region BU of the screw material B corresponding to the double screw portion forming region U, the screw material B corresponding to the single screw portion forming region J It is preferable to set the cross-sectional area of the single screw corresponding region BJ large. As can be seen from the both screw bodies D in FIG. 11 (B), although the two screw areas and the single screw area have the same valley diameter, the height of the thread is partial in the two screw sections. Small. That is, the unit thread volume of both screw areas in both screw bodies D and the unit thread volume of the single screw area are larger in the single screw area. Therefore, it is preferable to provide a volume difference between the double-screw corresponding area BU of the screw material B and the single-screw corresponding area BJ by an amount corresponding to the volume difference between the screw threads of the double screw and the single screw.

  Furthermore, it is also preferable to form a tapered surface at the boundary, in addition to forming a constriction V at the boundary between the both screw corresponding area BU of the screw material B and the single screw corresponding area BJ. Thus, the screw material B can be formed in advance when it is formed by pressing.

  As mentioned above, although the case where the 1st die member 132 by the side of fixation was adjusted with position adjustment part 170 was illustrated in rolling equipment 100 of this embodiment, the present invention is not limited to this. For example, as shown in FIG. 12, the second die member 142 may be moved in the rolling direction X by the position adjustment unit 170. For example, the position adjustment mechanism 180 of the position adjustment unit 170 may move the second holding mechanism 144, the support rail 149, the cycle mechanism 160, and the like together in the rolling direction X. Further, although not particularly shown, the second holding mechanism 144 can be moved in the rolling direction X by variably controlling the length of the connecting member 168 of the cycle mechanism 160.

  Moreover, although the case where the adjustment drive part 186 in the position adjustment part 170 turns into a hydraulic cylinder using a hydraulic servo was illustrated in this rolling apparatus 100, the drive source is not specifically limited. For example, a mechanical actuator such as a ball screw or a worm gear, an electromagnetic actuator, a piezoelectric actuator using a piezoelectric element, or a thermal expansion actuator (thermoactuator) utilizing thermal expansion of metal or resin can be used. However, when using an actuator that uses hydraulic servo or thermal expansion, it is possible to finely adjust the position with high accuracy, but in the case of a mechanical device, be aware that the accuracy is likely to be inferior to these. It takes

  Furthermore, although the case of the flat die rolling apparatus shown in FIG. 1A is illustrated in the present rolling apparatus 100, the present invention is not limited to this. For example, in the case of the rolling and rolling apparatus shown in FIG. 1 (B), the position adjustment mechanism allows the relative phase of one round die 132 and the other round die 142 to be adjusted. Further, for example, in the case of the planetary rolling device shown in FIG. 1C, as shown in FIG. 13, the position adjusting mechanism 180 in the position adjusting unit 170 uses the adjustment guide 184 to use an arc-shaped die member 132. Can be guided so as to be movable about the axis of the arc.

  Although the amount of position adjustment by the position adjustment unit 170 is not particularly limited, it is preferable to have an adjustment stroke of 0.5 mm or more. In addition, the position detection device in the position adjustment unit 170 is not limited to being incorporated in the adjustment drive unit 186, and the position of the die member may be directly measured, and the position detection is performed using other portions. Also good.

  Furthermore, in the above embodiment, the case where the position of the first die member 132 is fixed by the first holding mechanism 134 and the position in the rolling direction X of the first holding mechanism 134 is adjusted with high accuracy by the position adjusting unit 170 is described. Although illustrated, the present invention is not limited thereto.

  For example, as shown in FIG. 14, it is preferable to move the adjustment drive portion 186 of the position adjustment portion 170 directly to the rolling direction X with respect to the first die member 132. By the way, in this application example, the first die member 132 is divided into the die portion 132B and the holder 132C, and the clamping portion 136 installed on the holder 132C utilizes the die portion 132B from the upper surface side and the fixing bolt 136A It clamps and fixes to holder 132C.

  The first die member 132 is accommodated in the accommodation recess 135 of the first holding mechanism 134. In the first holding mechanism 134, four projection amount adjustment bolts 137A for supporting the opposite surface (rear surface) of the rolling surface 132A of the first die member 132 at its tip end, and the projection amount adjustment bolts 137A A tension bolt 137B fastened to one die member 132 is provided. The tension bolt 137B draws the first die member 132 toward the accommodation recess 135 to apply high pressure between the tip surface of the projection amount adjustment bolt 137A and the first die member 132. Thereby, highly accurate positioning of the first die member 123 can be realized.

  Further, the through holes 134A for the tension bolts 137B in the first holding mechanism 134 are long holes along the rolling direction X. Between the head of the tension bolt 137B and the first holding mechanism 134, a first deformation plate 139A which can be largely deformed in the surface direction is inserted with a small change in thickness in the axial direction. A second deformation plate 139B is also inserted between the holder 132C of the first die member 132 and the projecting end of the protrusion adjustment bolt 137A. As the first and second deformation plates 139A and 139B, as shown in the enlarged portion of FIG. 14A, a so-called laminated rubber in which a rubber G1 and a steel plate G2 are alternately laminated and bonded by vulcanization is used. Therefore, when the tension bolt 137B and the first die member 132 fastened thereto are moved relative to the first holding mechanism 134 in the rolling direction X, the first deformation plate 139A and the second deformation plate 139B move as shown in FIG. As shown by the dotted line in the enlarged part of (A), the thickness of the laminate hardly changes, and deformation in a direction perpendicular to the laminating direction, ie, shear deformation occurs.

  As shown in FIG. 14E, the holder 132C of the first die member 132 is formed with a through hole 132D extending in the vertical direction. The first die member 132 is fixed to the bottom surface side of the housing recess 135 by using the bottom surface fixing bolt 132E inserted into the through hole 132D. The through hole 132D is set to be larger than the screw axis of the fixing bolt 132E. This is because the first die member 132 needs to be adjusted in position relative to the accommodation recess 135 in both the rolling direction X and the normal direction of the rolling surface 132A.

  The recess-side sliding plate 135F is installed on the bottom surface of the housing recess 135, and the die-side sliding plate 132F is also installed on the bottom surface of the first die member 132 (the holder 132C). The recess-side sliding plate 135F and the die-side sliding plate 132F are stainless steel plates, and their sliding surfaces are coated with a fluorine resin (for example, Teflon (registered trademark) processing). Therefore, the first die member 132 can move relative to the housing recess 135.

  With the above configuration, even after the first die member 132 is firmly fixed to the first holding mechanism 134 by using the protrusion adjustment bolt 137A, the tension bolt 137B, the bottom surface fixing bolt 132E, etc., at the time of initial setting, Only the first die member 132 can be moved in the rolling direction X by the adjustment drive unit 186 of the adjustment unit 170. At this time, the die-side sliding plate 132F and the concave-side sliding plate 135F function as the "adjustment guides" in the present invention, with the sliding portions and the surface direction deformation of the first deformation plate 139A and the second deformation plate 139B. Do. As a result, without disassembling the first die member 132 or the first holding mechanism 134, the position adjusting unit 170 adjusts the position of the first die member 132 in the rolling direction X with high accuracy, thereby the rolling apparatus 100. The relative position of the rolling direction X of the first die member 132 and the second die member 142 can be finely adjusted even during the operation of the above.

  Although FIG. 14 illustrates the case where the positioning in the normal direction of the rolling surface 132A of the die member 132 is performed manually by the combination of the four projection amount adjustment bolts 137A and the tension bolts 137B, the present invention The invention is not limited to this, and these can also be configured by an actuator.

  The rolling apparatus described above is, of course, not limited to these, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 20 Rigid surface 22 Virtual surface 30 Concave part 31 Corner part 35 Bottom part 50 Valley part 100 Roll forming apparatus 120 Material supply part 130 Roll forming part 132 1st die member 134 1st holding mechanism 142 2nd die member 144 2nd holding mechanism 149 Support Rail 150 Drive part 152 Drive source 160 Movement mechanism 170 Position adjustment part 172 Control device 180 Position adjustment mechanism 182 Slider part 184 Adjustment guide 186 Adjustment drive part B Screw material D Double screw body E Shaft part J Single screw part formation area K Cylindrical part formation area M thread Q precursor processing area U double screw part formation area

Claims (6)

A first holding mechanism for holding a first die member having a first surface provided with a desired rolling shape;
A second holding mechanism for holding a second die member having a second surface provided with a rolling shape corresponding to the first surface;
Equipped with
The rolled and rolled body is held between the first surface and the second surface, and is moved relative to each other while facing each other while the rolled structure is held between the first surface and the second surface. It is configured to allow shaping of the desired rolled shape while rolling the body,
In the direction of the relative movement, possess the resulting finely adjust the relative position of the first die member and the second die member, the position adjusting mechanism capable of holding a set position by the fine adjustment,
The above position adjustment mechanism
An adjustment guide for guiding the first die member or the second die member in the rolling direction;
An adjustment drive unit for moving the first die member or the second die member along the adjustment guide;
Rolling apparatus comprising: a. A position detection device that detects the relative position;
A control device that controls the amount of movement of the adjustment drive mechanism by the adjustment drive unit based on the detection result of the position detection device;
Characterized in that,
Rolling device according to claim 1. The first die member is on the fixed side, and the second die member is on the moving side, which is moved by a moving mechanism that moves the first holding mechanism and the second holding mechanism relative to each other.
The position adjustment guide guides the first holding mechanism holding the first die member in the rolling direction.
Rolling device according to claim 1 or 2. The first die member is on the fixed side, and the second die member is on the moving side, which is moved by a moving mechanism that moves the first holding mechanism and the second holding mechanism relative to each other.
The first holding mechanism holds the first die member so as to be adjustable in the direction of the normal to the first surface,
The position adjustment guide guides the first die member in the rolling direction with respect to the first holding mechanism.
Rolling device according to claim 1 or 2. The first die member and the second die member form a substantially parallelogram in a direction normal to a virtual surface obtained by connecting the outermost portions of the surfaces to be rolled, and are recessed from the virtual surface And a plurality of recessed portions each including a plurality of threaded portion forming regions arranged in a plurality along the direction of relative displacement,
Rolling device according to any one of claims 1 to 4. In the first die member and the second die member, the arrangement pitch in the relative displacement direction of the recesses in the both screw portion forming regions is from the upstream side to the downstream side when the relative displacement with the screw material is made Characterized by having a region set small,
Rolling device according to claim 5.

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