JP2016198783A - Rotary die device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a metal mold with high accuracy even during processing at a high speed in a rotary die device.SOLUTION: A rotary die device 1 comprises: chains 17 and 19 on which metal molds 23 and 31 are loaded and which are wound around driving and following sprockets 13 and circularly moved; a cam follower 37 which is so located as to project a front end part and a rear end part of width direction both side faces of mounting plates 21 and 29 for the chains 17 and 19 to the metal molds 23 and 31 in a width direction; and routes 40 which are so located as to respectively face width direction both sides of the chains 17 and 19 and are provided along a movement locus of the cam follower 37. The device further comprises a guide plate 39 which suppresses oscillation of the metal molds 17 and 19 in a direction orthogonal to the chains 17 and 19 by bringing the cam follower 37 into engagement with the routes 40.SELECTED DRAWING: Figure 14D

Description

  The present invention relates to a rotary mold apparatus that performs various forming processes on a metal material by combining a pair of upper and lower mechanisms that are mounted on an endless track and made rotatable so that the metal material is passed between them.

  In recent years, speeding up of processing has been demanded due to a demand for cost reduction, and in the field of plastic processing, a continuous processing molding method using a rotary die apparatus that is not a conventional intermittent processing press method has been proposed.

  For example, in the rotating mold apparatus disclosed in Patent Document 1, only the machining point is obtained by changing the direction of the mold support using a cam mechanism while rotating the swingable mold support around the main axis. In addition, control is performed so that the upper and lower molds are almost horizontal immediately before contacting the workpiece, and the peripheral speed of the mold rotation and the feed speed of the workpiece near the machining point (mold closing point) are controlled. The difference is made as small as possible. This suppresses a decrease in machining accuracy caused by a mismatch between the peripheral speed (linear velocity) of the mold before and after the machining point and the feed speed of the workpiece.

US Pat. No. 6,339,947

  In the rotary mold apparatus described in Patent Document 1, the cam followers disposed at the diagonal positions of the mold support are moved up and down by cam mechanisms that follow the fixed disk cams provided on both side surfaces of the mold support. Control is performed so that the mold is generally horizontal immediately before and after the mold comes into contact with the workpiece. However, since the cam follower is located at the diagonal position of the mold support and positions the mold from the diagonal position, it cannot be said that the balance is good, and the rotational speed is increased to process at high speed. When doing so, there was a problem that the mold posture was not stable.

  The present invention has been made in view of the technical problem, and an object of the present invention is to position a mold with high accuracy even in high-speed machining in a rotary mold apparatus.

  According to an aspect of the present invention, an endless track that circulates and moves around a drive wheel and a driven wheel with a mold mounted thereon, and front end portions on both side surfaces in the width direction of the mounting portion of the mold on the endless track And a cam follower arranged so as to protrude in the width direction from the rear end portion, and a path made of slits or grooves provided along the movement track of the cam follower, respectively, facing the width direction both sides of the endless track. There is provided a rotating mold apparatus comprising: a guide plate that suppresses the deflection of the mold in a direction orthogonal to the endless track by engaging the cam follower with the cam follower.

  According to the above aspect, the vertical vibration of the endless track that circulates around the drive wheel and the driven wheel is suppressed by the engagement between the cam follower and the path provided along the movement track of the cam follower. it can. For this reason, even if a metal mold | die is conveyed at high speed by an endless track | orbit, a metal mold | die can be positioned with high precision and metal materials can be processed with high precision by engaging metal mold | dies with high precision.

1 is a perspective view of a rotary mold apparatus according to an embodiment of the present invention. It is a perspective view of the rotation mold mechanism for upper molds. It is a perspective view of the rotary mold mechanism for lower mold | types. It is a perspective view of the upper mold housing. It is a perspective view of the lower mold housing. It is a perspective view of an endless track. It is a perspective view of a state where an upper die punch plate and a material pressing part are mounted on the upper die endless track. It is a perspective view in the state where a lower die plate and a material pressing part are mounted on the lower die endless track. It is sectional drawing which cut | disconnected the upper mold | type endless track and the lower mold | type endless track with the surface orthogonal to those advancing directions, and has shown the state which the material holding | suppressing part and the material guide were meshing. It is VB-VB sectional drawing of FIG. 5A. It is the figure which showed the relative operation | movement of the material guide and the material holding | suppressing part. It is a side view of a metallic mold and shows the state where a metallic mold was opened. The mold is a front view, and shows a state where the mold is opened. It is a side view of a metallic mold and shows the state where a metallic mold was closed. It is a front view of a metal mold | die and has shown the state which the metal mold | die closed. It is a top view of an upper mold punch plate. It is a top view of a lower die plate. It is a figure for demonstrating how the movement of the up-down direction of a metal mold | die is generated. It is XB-XB sectional drawing of FIG. 10A. It is a figure for demonstrating operation | movement of a metal mold | die from a mechanical viewpoint. It is the figure which showed the modification of the fixed cam. It is the figure which showed the example of the combination of a fixed cam. It is the figure which showed another example of the combination of a fixed cam. It is a figure for demonstrating the cam follower attached to a lower mold | type attachment plate. It is the figure which showed the structure of the path | route in which a cam follower is inserted. It is the figure which showed the state by which the cam follower was inserted in the path | route. It is a three-dimensional view showing a state in which the cam follower is inserted into the path. It is a figure for demonstrating the up-and-down amplitude of a chain. It is a figure for demonstrating the play and clearance required for a chain. It is a figure for demonstrating the play and clearance required for a chain. It is the figure which showed the example which applied the rotary die apparatus to production equipment. It is the figure which showed the example of the product shape which can be produced with the production facility of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1A is a perspective view of a rotary mold apparatus 1 according to an embodiment of the present invention. The rotary mold apparatus 1 includes an upper mold rotary mold mechanism 100 and a lower mold rotary mold mechanism 200. FIG. 1B and FIG. 1C show the upper mold rotating mold mechanism 100 and the lower mold rotating mold mechanism 200 separately for the sake of clarity.

  When the metal material 300 is inserted into the rotary mold apparatus 1 from the inlet side guide 9, the metal material 300 is transferred to the upper mold and the lower mold rotary mold mechanism 200 incorporated in the upper mold rotary mold mechanism 100. It is sandwiched between the incorporated lower molds, undergoes a required forming process such as drawing, and is discharged from the outlet side guide 10.

  The upper mold endless track 17 is wound between the drive shaft 2 and the driven shaft 5. The tension adjustment of the upper mold endless track 17 is performed by the tensioner 7. Similarly, the lower mold endless track 19 is wound between the drive shaft 3 and the driven shaft 6. The tension adjustment of the lower mold endless track 19 is performed by the tensioner 8. The lower part of the upper mold endless track 17 and the upper part of the lower mold endless track 19 are arranged in parallel inside the rotary mold apparatus 1.

  The rotating mold apparatus 1 is provided with a gear train 4 for synchronizing the upper mold endless track 17 and the lower mold endless track 19. When the upper mold endless track 17 and the lower mold endless track 19 are driven in directions opposite to each other, the mold is fed and the metal material 300 is fed.

  The front side of the upper and lower drive shafts 2 and 3 is chamfered in a shape that fits into a hole of a crank handle (not shown), and the crank handle can be inserted here to perform mold matching and molding try. It is like.

  The rear sides of the upper and lower drive shafts 2 and 3 are connected to the drive motor 11 via couplings. A reduction gear is attached to the drive motor 11 in order to increase the processing torque. A viewing window 12 for confirming the movement of the mold is formed between the upper mold rotating mold mechanism 100 and the lower mold rotating mold mechanism 200.

  In order to deepen the understanding of the rotary mold apparatus 1, details of the structure will be described using an exploded view of the rotary mold apparatus 1.

  2A shows an upper mold casing 100b of the upper mold rotary mold mechanism 100, and FIG. 2B shows a lower mold casing 200b of the lower mold rotary mold mechanism 200.

  As shown in FIG. 2A, the upper mold housing 100b is configured in a box shape with a front plate 101, a rear plate 102, and shafts 103 connecting them at four corners. A receiving plate 104 for installing an upper mold fixing cam 35a (see FIG. 10A), which will be described later, is incorporated between the front plate 101 and the rear plate 102 by an inlay at the center of the upper mold housing 100b. It plays the role of receiving the molding load of the upper mold. The front plate 101 is formed with a hole 101 a for installing the drive shaft 2 of the upper mold endless track 17 and a hole 101 b for installing the driven shaft 5.

  Similarly, as shown in FIG. 2B, the lower mold housing 200b is configured in a box shape with a front plate 201, a rear plate 202, and shafts 203 connecting them at four corners. A receiving plate 204 for installing a lower mold fixing cam 35b (see FIG. 10A), which will be described later, is incorporated between the front plate 201 and the rear plate 202 by an inlay at the center of the lower mold housing 200b. It plays the role of receiving the molding load of the lower mold. In the front plate 201, a hole 201a for installing the drive shaft 3 of the lower mold endless track 19 and a hole 201b for installing the driven shaft 6 are formed.

  On the bottom surface of the lower mold housing 200b, a mounting plate 205 for fixing the entire rotary mold apparatus 1 to an apparatus installation base (not shown) is further attached. Also, a parallel key 206 for positioning when combining the upper mold casing 100b and the lower mold casing 200b is embedded in the lower mold casing 200b. The upper mold housing 100b and the lower mold housing 200b are screwed into a tapped hole 201c formed in the lower mold housing 200b with a fastening bolt (not shown) passed through a bolt hole 101c formed in the upper mold housing 100b. Is integrated.

  FIG. 3 is a perspective view of the lower mold endless track 19. Although illustration is omitted, the upper mold endless track 17 has the same structure.

  The upper mold endless track 17 and the lower mold endless track 19 are constituted by a chain 14 and a sprocket 13. An attachment 15 is attached to the chain 14 so that a mold and a material guide can be attached. The chain 14 is selected from commercially available products in consideration of the product pitch required for the products produced by this apparatus, product accuracy, molding processing force, etc., or manufactured as a custom-made product.

  The chain 14 is used as a set of two chains, and is fixed to the drive shaft 3 (or the drive shaft 2) with a gap between the two sprockets 13 and the driven shaft 6 (or the driven shaft 5). Hang between the two sprockets 13 used. A bearing 16 is attached to the drive shaft 3 (or the drive shaft 2) and the driven shaft 6 (or the driven shaft 5), and a lower mold housing 200b (or an upper mold housing 100b) shown in FIG. 2B through a bearing box. Incorporated into. In actual assembly, the chain 14 is wound after the drive shaft 3 (or the drive shaft 2) and the driven shaft 6 (or the driven shaft 5) are assembled to the lower mold housing 200b (or the upper mold housing 100b).

  In this embodiment, the chain 14 is used as an endless track. However, the chain 14 may not be used as long as it is an endless track. For example, an attachment belt for attaching a mold or a timing belt may be used.

  4A is a perspective view of a state in which the upper punch plate 23 and the material pressing portion 18 are mounted on the upper mold endless track 17 as an upper mold, and FIG. FIG. 6 is a perspective view of a state in which a lower die plate 31 and a material guide 20 are mounted.

  The upper die plate 23, the material pressing part 18, the lower die plate 31, and the material guide 20 are placed on the two chains so as to straddle the two chains 14, and are attached to the attachment 15 by bolts and nuts (not shown). Fixed. A positioning pin may be used so that the upper die punch plate 23, the material pressing portion 18, the lower die plate 31, and the material guide 20 are fixed to the attachment 15 at correct positions. The interval between the upper die punch plate 23 and the material pressing portion 18 and the interval between the lower die plate 31 and the material guide 20 are matched to the production pitch of the product to be produced. In some cases, the production pitch of the product is determined conversely from the pitch of the chain 14.

  5A is a cross-sectional view of the upper mold endless track 17 and the lower mold endless track 19 taken along a plane orthogonal to the traveling direction thereof, and FIG. 5B is a VB-VB cross section of FIG. 5A. . Each shows a state where the material pressing portion 18 and the material guide 20 are engaged with each other.

  The material guide 20 mounted on the lower mold endless track 19 regulates the feed height and the position in the width direction of the metal material 300. The hole 20a formed in the material guide 20 is a hole for weight reduction.

  The material pressing part 18 mounted on the upper mold endless track 17 has a pushing piece 18a movable by a suspension bolt 18b and a spring 18c, and the metal material 300 is pushed by the force of the spring 18c and the pushing piece 18a and the material guide. The metal material 300 is fed together with the progress of the upper mold endless track 17 and the lower mold endless track 19. That is, the set of the material pressing portion 18 and the material guide 20 also functions as a material feeding device.

  Further, the surfaces of the push piece 18a and the material guide 20 that are in contact with the metal material 300 are each formed of a curved surface having a predetermined radius of curvature R, as shown in FIG. 5B. The radius of curvature R is set to be equal to the distance from the center of the sprocket 13 to the surface of the metal material 300 (see FIG. 6).

  FIG. 6 is a view showing the relative operation of the material pressing portion 18 and the material guide 20. Since the curvature radius R is set as described above, even when the material pressing portion 18 and the material guide 20 approach the metal material 300 while sandwiching the metal material 300 while rotating around the center of the sprocket 13, the mutual corner Does not interfere strongly, and the metal material 300 is prevented from being damaged.

  In this embodiment, the upper mold endless track 17 and the lower mold endless track 19 are mounted on the upper mold endless track 17 and the lower mold endless track 19 by mounting the material pressing portion 18 and the material guide 20 on the upper mold endless track 17 and the lower mold endless track 19. Although the material feeding function is provided, the material feeding function may be realized by a device provided separately from the rotary mold device 1, for example, a feed device disposed on the upstream side and the downstream side of the rotary mold device 1. Good.

  Next, the structure of the mold (upper punch plate 23 and lower die plate 31) will be described.

  FIG. 7A is a side view of the mold opened, and FIG. 7B is a front view thereof. 8A is a side view of the mold closed, and FIG. 8B is a front view thereof. FIG. 9A is a plan view of the upper die plate 23, and FIG. 9B is a plan view of the lower die plate 31.

  In the state where the mold is opened, as shown in FIGS. 7A and 7B, the metal material 300 is placed between the material pressing portion 18, the material guide 20, and the intermediate position between the upper die punch plate 23 and the lower die plate 31. Is held by. The upper die attaching plate 21 is fixed to the chain 14, and the upper die punch plate 23 and the upper die receiving plate 22 are fixed in pairs by a knock pin 33 and a bolt 34. An upper mold driving cam 24 a and an upper mold pull-back bolt 25 a are fixed to the upper mold receiving plate 22.

  A spring 26 is incorporated in the upper mold pull-back bolt 25a with the upper mold attachment plate 21 interposed therebetween, and is fastened with a set 27 of a washer and a nut. The upper mold retracting bolt 25a and the hole of the upper mold mounting plate 21 into which the upper mold retracting bolt 25a is fitted are slidably fitted, and the hole of the upper mold mounting plate 21 through which the upper mold driving cam 24a passes is I have escaped.

  With such a structure, when the upper mold driving cam 24a is pushed by an upper mold fixing cam 35a, which will be described later, the pair of the upper mold punch plate 23 and the upper mold receiving plate 22 moves away from the upper mold mounting plate 21. . When the force that pushes the upper mold drive cam 24 a is released from this state, the pair of the upper mold punch plate 23 and the upper mold receiving plate 22 is pulled back to the upper mold mounting plate 21 by the spring 26. Z1 shown in FIG. 8A corresponds to the movement stroke of the upper punch plate 23.

  Similarly, the lower die attaching plate 29 is fixed to the chain 14, and the lower die plate 31 and the lower die receiving plate 30 are fixed in pairs by a knock pin 33 and a bolt 34. A lower mold driving cam 24b and a lower mold pull-back bolt 25b are fixed to the lower mold receiving plate 30.

  A spring 26 is incorporated in the lower mold pull-back bolt 25b with a lower mold attachment plate 29 interposed therebetween, and is fastened with a set 27 of a washer and a nut. The lower mold pull-back bolt 25b and the hole of the lower mold attachment plate 29 into which the lower mold pull-back bolt 25b is fitted are slidably fitted, and the hole of the lower mold attachment plate 29 through which the lower mold drive cam 24b passes is I have escaped.

  With such a structure, when the lower mold driving cam 24 b is pushed by the lower mold fixing cam 35 b described later, the pair of the lower mold plate 31 and the lower mold receiving plate 30 moves away from the lower mold mounting plate 29. . When the force that pushes the lower mold drive cam 24 b is loosened from this state, the pair of the lower mold plate 31 and the lower mold receiving plate 30 is pulled back to the lower mold mounting plate 29 by the spring 26. Z2 shown in FIG. 8A corresponds to the movement stroke of the lower die plate 31.

  The guide pins 32 fixed to the lower die plate 31 and the guide bushes 28 fixed to the upper die plate 23 are precisely fitted to each other, and the upper die punch plate 23 and the lower die plate 31 are positioned. I do.

  In a state where the mold is closed, the metal material 300 is pushed out by the upper mold punch plate 23 and the lower mold plate 31 and is formed into a required shape.

  Next, the movement of the mold (upper punch plate 23 and lower die plate 31) will be described.

  FIG. 10A illustrates how the mold mounted on the chain 14 generates vertical movement. FIG. 10B shows an XB-XB cross section of FIG. 10A. The upper mold fixing cam 35a and the lower mold fixing cam 35b are arranged along the upper mold endless track 17 and the lower mold endless track 19, respectively, from the point (A) to the point (E) in the figure. In the region extending to (2), there are mountain-shaped cam surfaces 36a and 36b each having a point (C) as a vertex.

  The movement will be described in detail. When the upper die punch plate 23, the lower die plate 31, and the metal material 300 are moved in synchronization with the progress of the chain 14, and come to the point (A). The upper mold driving cam 24a and the lower mold driving cam 24b come into contact with the corresponding upper and lower fixed cams 35a and 35b, respectively.

  When the chain 14 further advances from the point (A), the upper die driving cam 24a and the lower die driving cam 24b are pushed by the inclined cam surfaces of the fixed cams 35a and 35b, respectively, and the upper die punch plate 23 and The lower die plate 31 moves in the approaching direction, and the molding surface of the upper punch plate 23 and the molding surface of the lower die plate 31 gradually approach each other.

  When the point (B) is reached, the guide bush 28 and the guide pin 32 start to be fitted, and the upper die punch plate 23 and the lower die plate 31 are accurately positioned.

  When further proceeding, the upper die punch plate 23 and the lower die plate 31 are further pushed out, so that the upper die punch plate 23 and the lower die plate 31 sandwich the metal material 300, and the molding process is started.

  When the point (C) is reached, the upper die driving cam 24a and the lower die driving cam 24b reach the tops of the fixed cams 35a and 35b, respectively, and the upper die punch plate 23 and the lower die plate 31 move. The amount becomes the maximum, and the molding surfaces of each other are pushed and closed with the metal material 300 interposed therebetween, and the “mold closing” state is reached, and the shape imparting to the metal material 300 is completed.

  Thereafter, as the chain 14 further advances, the inclination angles of the fixed cams 35a and 35b become negative, so that the upper die punch plate 23 and the lower die plate 31 are pulled back by the spring 26, respectively. "Starts (point (D)). Thereafter, when the point (E) is reached, the upper die punch plate 23 and the lower die plate 31 are pulled back, and the upper die punch plate 23 and the lower die plate 31 are moved from the metal material 300 subjected to the forming process. Completely separated.

  When the point (E) is reached, the upper die plate 23 and the lower die plate 31 rotate around the sprocket 13 together with the chain 14 to return to the point (A) again, and repeat the molding cycle.

  FIG. 11 explains the operation of the mold from a mechanical viewpoint.

In FIG. 11, the lower die plate 31, the lower die fixing cam 35b, the lower die driving cam 24b, the sprocket 13, and the chain 14 are shown in a simplified manner. If the tension of the chain 14 is F, the slight displacement in the traveling direction of the lower die plate 31 is dx, and the minute displacement in the vertical direction is dy, from the principle of virtual work,
F · dx = W · dy (1)
The relationship is established. If the cam angle of the lower mold fixing cam 35b is θ, dy / dx = tan θ, so the molding force W of the lower mold plate 31 is
W = F · 1 / tanθ (2)
Can be expressed as

Further, the tension F of the chain 14 can be obtained by assuming that the torque of the drive shaft 3 is T and the radius of the sprocket 13 is R.
F = T / R (3)
Can be expressed as

If Expression (3) is substituted for F in Expression (2), the forming force W of the lower die plate 31 is
W = T / (R · tan θ) (4)
It can be expressed as.

  According to equation (4), it can be seen that the molding force W of the lower die plate 31 is proportional to the torque T of the drive shaft 3 and inversely proportional to the radius R of the sprocket 13.

  Further, according to the equation (2), if the frictional force is ignored, the molding force W of the lower die plate 31 becomes equal to the tension F if the cam angle θ of the lower die fixing cam 35b is set to 45 degrees. It can be seen that the molding force W of the lower die plate 31 can be made larger than the tension F if it is set to less than degrees. That is, a large force can be generated with a small force by the wedge increasing effect of the lower mold fixing cam 35b.

  For example, if the cam angle θ of the lower mold fixed cam 35b is set to 5 degrees, the output is 11.4 times, and if it is set to 2 degrees, the output is 28.6 times. Thereby, even if the torque of the drive motor 11 is small, a sufficient molding force W of the lower die plate 31 can be obtained, and the torque required for the drive motor 11 can be reduced.

  FIG. 12 shows a modification of the lower mold fixing cam 35b. In the modified example, the lower die plate 31 is first fast-forwarded with a large gradient θa and fast forwarded, and the lower die plate 31 is slowly moved upward while the gradient is reduced to θb midway. Make up surface.

  That is, FIG. 12 shows that the vertical feed speed of the lower die plate 31 can be controlled by changing the gradient of the cam surface of the lower die fixed cam 35b. It can be seen that the processing speed can be set accordingly.

  Similarly, the vertical feed speed of the upper die punch plate 23 can also be controlled by changing the gradient of the cam surface of the upper die fixing cam 35a.

  13A and 13B show examples of combinations of the upper mold fixing cam 35a and the lower mold fixing cam 35b.

  FIG. 13A shows an example in which a movement in which the upper die punch plate 23 gradually descends is realized while the lower die plate 31 rises and waits at a certain height. FIG. 13B shows an example in which the upper die punch plate 23 is lowered twice to form, that is, a wrist-like process can be realized.

  Thus, according to the rotary mold apparatus 1 according to the present embodiment, the upper die punch plate 23 is set by separately setting the shape of the upper die fixing cam 35a and the shape of the lower die fixing cam 35b. The vertical feed timing of the lower die plate 31 and the vertical feed timing of the lower die plate 31 can be controlled separately according to the processing purpose.

  Further, the feeding speed of the upper die plate 23 and the lower die plate 31 and the feeding speed of the metal material 300 are matched in a wide range, and the upper die punch plate 23 is spread over a wide range before and after the processing point (die closing point). In addition, since the lower die plate 31 can be processed while being kept horizontal, it is possible to cope with various forming processes including a process with a precise clearance and a deep forming process.

  Further, the molding force acts on the upper mold fixing cam 35 a and the lower mold fixing cam 35 b, and does not act on the drive shafts 2 and 3 and the driven shafts 5 and 6. Thereby, in order to maintain the intensity | strength of these rotating shafts, it becomes unnecessary to make these rotating shafts thick, and it can suppress that the rotary die apparatus 1 enlarges.

  Here, the configuration in which both the upper mold fixing cam 35a and the lower mold fixing cam 35b have inclined surfaces has been described, but either of them is formed only by a flat surface, and the molding that acts on the corresponding mold. You may make it have only the function to receive a load. In this case, only one mold moves up and down.

  Also, as shown in FIGS. 16A and 16B, the chain 14 is constructed by connecting a large number of links 14l composed of rollers 14r and joint plates 14j, and when this rotates through the sprocket 13, the number of teeth of the sprocket 13 and Rotate in the same polygon. For this reason, the rotating chain 14 rotates with a runout width that minimizes the distance from the center of the sprocket 13 to the polygon side and maximizes the distance from the center of the sprocket 13 to the vertex of the polygon (see FIG. 15).

  Further, in practice, the chain 14 needs to play (slack) in the direction between the axes of the sprocket 13 and also needs clearance in the width direction of the engagement between the sprocket 13 and the chain 14 (see FIG. 16B).

  For this reason, the upper die punch plate 23 and the lower die plate 31 try to vibrate up and down, left and right, but the rotary mold apparatus 1 according to the present embodiment suppresses the vibration by the structure described below, and the upper die The postures of the punch plate 23 and the lower die plate 31 are stabilized.

  Specifically, as shown in FIG. 14A, cam followers 37 for restricting vertical deflection are attached to the four corners of the lower die attachment plate 29 to which the lower die plate 31 is attached. A cam follower 38 that restricts the deflection of the direction is attached.

  In the illustrated example, the cam follower 37 is formed by a roller that rotates around an axis provided so as to protrude in the width direction from the four corners of the front end portion and the rear end portion of both sides in the width direction of the lower mold attachment plate 29. The cam follower 37 is not limited to that shown in the figure. For example, the cam follower 37 protrudes in the width direction from the four corners of the front end portion and the rear end portion on both sides in the width direction of the lower mold mounting plate 29 with the upper and lower surfaces as sliding surfaces. It may be a block-shaped slider attached. In the illustrated example, the cam follower 38 is formed by a roller that rotates about an axis orthogonal to the axis of the cam follower 37 on both sides in the width direction of the lower mold attachment plate 29. The cam follower 38 is not limited to the illustrated one, and may be, for example, a block-like slider that protrudes from both sides in the width direction of the lower mold attachment plate 29 with the front end surface protruding as a sliding surface.

  FIG. 14B shows the configuration of the path 40 into which the cam follower 37 is inserted. The path 40 is formed by a guide plate 39 attached to the inner wall of the rear plate 202 of the lower mold rotating mold mechanism 200. In the illustrated example, the guide plate 39 is formed by an inner guide plate 39b that constitutes the inner wall surface of the path 40 and an outer guide plate 39c that constitutes the outer wall surface of the path 40, and the path 40 is an outer periphery of the inner guide plate 39b. Is formed by a slit formed by the inner wall surface of the outer guide plate 39c and the outer wall surface of the inner periphery of the outer guide plate 39c.

  The cam follower 37 moves along a path 40 formed by a slit formed between the inner guide plate 39b and the outer guide plate 39c. The path 40 may be formed by a groove provided in the guide plate 39 instead of the slit.

  The path 40 includes a straight region 40 a between the paired sprockets 13 and a winding region 40 b that goes around the sprocket 13. The width dimension of the linear area 40a is formed to be narrower than the width dimension of the winding area 40b, which is another part, and thereby the vibration of the lower die plate 31 in the vertical direction is suppressed.

  That is, the vertical vibration caused by the winding on the sprocket 13 is suppressed by the engagement of the linear region 40a and the cam follower 37 in the narrower path 40, so that the lower die plate 31 is moved by the chain 14. Even when transported at a high speed, the lower die plate 31 can be positioned with high accuracy, and can be stably processed with high accuracy by high-precision engagement with the upper die punch plate.

  In addition, the width dimension of the winding area 40b in the path 40 is larger than the width dimension of the linear area 40a in the path 40 so as to extend toward the outer diameter side. As a result, the cam follower 37 that is disposed at the four corners of the front end portion and the rear end portion on both sides in the width direction of the lower die attachment plate 29 is offset from the front and rear center of the lower die attachment plate 29 in the winding region 40b. In addition, the cam follower 37 is allowed to move in the radial direction due to the swing of the chain 14 while it is wound around the polygonal sprocket 13. As a result, it is possible to prevent the locking phenomenon due to the interference between the cam follower 37 and the path 40 during the turning of the lower die plate 31 around the sprocket 13, and the lower die plate 31 can be smoothly U-turned. 31 can be rotated at high speed.

  Further, since the path 40 is closed by the outer guide plate 39c, even if the connecting portion between the lower die plate 31 and the lower die endless track 19 is damaged, the lower die plate 31 is rotated by the rotating die. It does not jump out of the device 1.

  The cam follower 38 is substantially in close contact with the surface of the guide plate 39 (in the illustrated example, the outer guide plate 39c). Thereby, the movement of the lower die plate 31 in the left-right direction is restricted, and the vibration in the left-right direction is suppressed.

  14C and 14D show a state where the cam follower 37 is inserted into the path 40. FIG. As shown in FIG. 15, the cam follower 38 is installed so as to be in close contact with the guide plate 39, whereas the cam follower 37 is incorporated in the path 40 with a certain large gap as shown in FIG. This is because a certain amount of vertical amplitude of the chain 14 is unavoidable, and in order to smoothly move the cam follower 37 along the path 40, it is necessary to allow some vertical vibration of the cam follower 37.

  A part 39a of the guide plate 39 has a structure that can be easily removed after assembly of the apparatus, and the lower die plate 31 can be taken in and out from here.

  Although only the lower mold rotating mold mechanism 200 is shown here, the upper mold rotating mold mechanism 100 has the same structure. That is, the upper die mounting plate 21 to which the upper die punch plate 23 is attached is similarly provided with cam followers 37 and 38, and vibrations of the upper die punch plate 23 in the vertical and horizontal directions are suppressed. Needless to say, the guide plate 39 is mounted symmetrically inside the front plates 101 and 201 and the rear plates 102 and 202, respectively.

  By further providing the above structure, the upper die punch plate 23 and the lower die plate 31 can run in a substantially stable posture relative to each other, and are finally positioned by the guide pins 32 and the guide bushes 28. Thus, the molding process can be performed more stably.

  Then, the example which applied the rotary die apparatus 1 which concerns on this embodiment to production equipment is demonstrated.

  FIG. 17 is a schematic diagram of an example in which the rotary mold apparatus 1 is directly connected to a roll forming apparatus that processes with the rolls 1 to 3 while continuously feeding the material, and processing is performed while continuously feeding the material. According to this example, it is possible to continuously produce a product having a composite shape obtained by additionally processing a drawn shape or a drawn shape by press working on a roll molded product having a constant cross section without stopping the material.

  FIG. 18 is an example of a product shape that can be produced by the production facility of FIG. In this example, the cutting process is not shown.

  FIG. 17 and FIG. 18 are examples of processing by the rotary mold apparatus 1 following roll forming, but conversely, the rotary mold apparatus 1 is first drawn into a blank material and is performed by normal pressing such as drawing or engraving. After processing, it is possible to continuously add a shape of a constant cross section through a roll forming device. Eventually, both the rotating mold apparatus 1 and roll forming can be formed while continuously feeding the material without stopping, so the order of the steps of forming the material by arranging them can be arbitrarily set. In addition, a combination of a plurality of units is possible, and it is possible to handle production of products of various shapes.

  The embodiment of the present invention has been described above, but the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

1 Rotating mold device 13 Sprocket (drive wheel, driven wheel)
17 Endless track for upper mold (1st track)
18 Material pressing part (first pressing part)
19 Endless track for lower mold (second endless track)
20 Material guide (second holding part)
21 Upper mold mounting plate (Mounting part)
23 Upper punch plate (first mold)
24a Upper mold drive cam (first drive cam)
24b Lower mold drive cam (second drive cam)
29 Lower mold mounting plate (mounting part)
31 Lower die plate (second mold)
35a Upper mold fixed cam (first fixed cam)
35b Fixed mold for lower mold (second fixed cam)
36a, 36b Cam surface 37 Cam follower 38 Cam follower (second cam follower)
39 Guide plate 39a Part of guide plate 39b Inner guide plate 39c Outer guide plate 40 Path 40a Straight line area (route provided in straight line area)
40b Winding area (path provided in the area to be wound)

Claims (6)

An endless track that circulates around a drive wheel and driven wheel with a mold mounted,
A cam follower arranged to protrude in the width direction from the front end portion and the rear end portion of both side surfaces in the width direction of the mounting portion of the mold to the endless track;
The endless track is disposed on both sides of the endless track in the width direction and includes a path formed by slits or grooves provided along the movement path of the cam follower. A guide plate that suppresses the deflection of the mold in the orthogonal direction;
A rotating mold apparatus comprising: The rotary mold apparatus according to claim 1,
The mounting portion engages with the surface of the guide plate facing the endless track on both sides in the width direction of the mounting portion, and suppresses the mold from swinging in the width direction of the endless track. A rotary mold apparatus comprising a cam follower. The rotary mold apparatus according to claim 1 or 2,
In the guide plate, the width dimension of the path provided in the region where the endless track is wound around the driving wheel and the driven wheel is more radially outward than the width dimension of the path provided in the linear region between the driving wheel and the driven wheel. A rotary mold apparatus characterized by being formed large. A rotary mold apparatus according to any one of claims 1 to 3,
A part of the guide plate located on the outer peripheral side of the path is formed separately from other guide plates and can be attached and detached independently. The rotary mold apparatus according to any one of claims 1 to 4,
The endless track is
A first endless track mounted with a first mold to which a first drive cam is fixed;
A portion of the first endless track disposed parallel to the first endless track, and a second endless track mounted with a second mold.
A chevron that is disposed along the first endless track and that contacts the first driving cam and displaces the first mold in a direction approaching the second mold and then displaces in a direction away from the second mold. A rotary mold apparatus comprising a first fixed cam having a cam surface. The rotary mold apparatus according to claim 5,
A second driving cam is fixed to the second mold,
A chevron that is disposed along the second endless track and that contacts the second driving cam and displaces the second mold in a direction approaching the first mold and then displaces in a direction away from the first mold. A rotary mold apparatus comprising a second fixed cam having a cam surface.