JP2021175581A - Bending device - Google Patents

Abstract

To improve efficiency of bending work in a bending device including a female die 12 and a male die 11 which sandwich a plate-like workpiece W.SOLUTION: A bending device 10 of the invention includes a female die 12 and a male die 11 which sandwich a plate-like workpiece W. The female die 12 and the male die 11 are formed in vertically long forms. The female die 12 and the male die 11 cooperate to bend the workpiece W into a truncated cone shape or a cylindrical shape so that the workpiece W is wound around the male die 11.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bending apparatus including a female mold and a male mold for sandwiching a plate-shaped work.

For example, as a bending device for bending a fan plate-shaped work into a truncated cone cylinder shape, a roller type is well known. In the roller-type bending apparatus, a fan plate-shaped work sandwiched between the upper and lower rollers is conveyed as the upper and lower rollers rotate, and is bent so as to become a truncated cone-shaped member. As the roller type bending apparatus, there are those in which the upper and lower rollers are columnar, those in which the upper and lower rollers are tapered, and the like (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2000-33426 Japanese Unexamined Patent Publication No. 2012-236207

However, in the conventional roller-type bending apparatus, the fan plate-shaped work sandwiched between the upper and lower rollers is bent while being conveyed along with the rotation of the upper and lower rollers. A wide range of unprocessed parts remains at both ends. Therefore, in order to finally form the truncated cone-shaped member, there is a problem that the unprocessed portion must be pressed and bent by a pressing device separately from the roller-type bending device. That is, conventionally, when forming a truncated cone-shaped member, two operations of bending most of the work piece by a roller type bending machine and bending both ends of the work piece by a press device (end bending) are separated. There is a problem that it is troublesome and troublesome because it has to be performed using an apparatus.

It is a technical subject of the present invention to provide a bending apparatus which has been improved by examining the above-mentioned current situation.

The bending apparatus of the present invention includes a female mold and a male mold for sandwiching a plate-shaped work, and a truncated cone cylinder so that the work is wound around the male mold by the cooperation of the female mold and the male mold. It can be bent into a shape or a cylinder.

In the bending apparatus of the present invention, the female mold or the male mold may be provided with a feed roller that supports the work and intermittently feeds the work at a predetermined pitch. It is desirable that a plurality of the feed rollers are provided in order to stably support the work.

In the bending apparatus of the present invention, the female mold is configured to be movable in contact with and detached from the male mold, while the male mold is configured to be fixed, and the feed roller is fixed. It may be arranged in the male type. It is also possible to configure the female mold to be fixed and to configure the male mold to be movable in contact with and detach from the female mold. In this case, the feed roller is preferably arranged in the female mold, which is a fixed type.

In the bending apparatus of the present invention, the female mold or the male mold may be provided with a damper member that presses and holds the work before and after pinching. In the present invention, the wording "the female type or the male type" also includes an element of a holder that holds each of these types. That is, providing the damper member to the female holder or the male holder is also included in the content of the claims.

In the bending apparatus of the present invention, the female mold or the male mold is detachably supported by the holder support, and the mold attached to and detached from the holder support and the feed roller are unitized. It may be.

In the bending apparatus of the present invention, in addition to the mold attached to and detached from the holder support and the feed roller, a bending sensor for measuring the bending shape of the work may be included in the unitization.

In the bending apparatus of the present invention, in addition to the mold attached to and detached from the holder support and the feed roller, a support arm that supports the bending shape of the work may be included in the unitization.

In the bending apparatus of the present invention, the feed roller may be configured so that the mounting position can be adjusted along the longitudinal direction of the female mold or the male mold.

In the bending apparatus of the present invention, the feed rollers are arranged on both ends in the longitudinal direction of the female mold or the male mold, and the work may be sandwiched and held by both feed rollers. ..

In the bending apparatus of the present invention, the drive source for connecting and separating the female mold or the male mold may be a linear actuator or a rotary actuator. As the linear actuator, various actuators such as a hydraulic cylinder, an air cylinder, an electric cylinder, and a linear motor can be adopted. As the rotary actuator, various motors such as an electric motor and a hydraulic motor can be adopted. When the rotary actuator is adopted, the female mold or the male mold may be connected to the rotary actuator so as to be able to transmit power via a conversion mechanism that converts the rotary motion into a reciprocating motion.

According to the present invention, it is possible to bend a plate-shaped work into a truncated cone shape or a cylindrical shape so as to wind a plate-shaped work around a male mold by the cooperation of a female mold and a male mold with only one bending machine. Therefore, it is possible to eliminate or reduce the trouble of bending using a plurality of devices as in the prior art, and therefore, it is possible to improve the efficiency of the bending work on the work.

It is a front view of the bending processing apparatus in 1st Embodiment. It is a top view of the bending machine. It is an enlarged front view of a bending machine. It is an enlarged plan view of the bending machine in the initial state. It is an enlarged plan view of the bending processing apparatus in the separated state at the beginning of processing. It is an enlarged plan view of the bending processing apparatus which is in a separated state in the process of bending. It is an enlarged plan view of the bending processing apparatus in a pinching state. It is a schematic diagram explaining the bending process of a fan plate-shaped work. It is a functional block diagram of a bending apparatus. It is an enlarged plan view which shows another example of a feed roller. It is an enlarged front view which shows another example of a damper member. It is a perspective view which shows another example which attached the bending sensor to a female holder. It is a perspective view which looked at the bending apparatus in 2nd Embodiment from the front side. It is a perspective view which looked at the bending apparatus from the back side. It is a front view of the bending machine. It is an enlarged perspective view of the lower feed roller. It is an enlarged perspective view of the upper feed roller. It is an enlarged perspective view of a bending sensor. It is a perspective view which looked at the bending apparatus in 3rd Embodiment from the front side. It is a perspective view which looked at the bending processing apparatus in 4th Embodiment from the front side. It is a perspective view of the unitized female mold and its peripheral parts. It is a front view of the unitized female mold and its peripheral parts. It is an enlarged perspective view of a pair of right feed rollers. It is an enlarged perspective view of a pair of left feed rollers. (A) is a side view of the support arm, and (b) is a plan view of the support arm. It is an enlarged perspective view of the movement amount detection sensor. It is explanatory drawing of the screw blade formed by a bending apparatus, (a) is a figure of a right-handed screw blade, and (b) is a figure of a left-handed screw blade.

Next, an embodiment embodying the present invention will be described with reference to the drawings. Here, a case where a cone-shaped funnel part is formed by using a fan plate-shaped work W will be described as an example.

Further, in the following description, the words "front and back" and "left and right" are used to specify the direction, but in the following embodiment, the states of FIGS. 1 and 15 facing the bending apparatus are viewed from the front. Based on these, the front-back direction and the left-right direction are defined. However, these terms are for convenience of explanation only and do not limit the technical scope of the present invention.

The bending apparatus 10 of the first embodiment shown in FIGS. 1 to 6 is a so-called press type that bends a fan plate-shaped work W by the cooperation of the female mold 12 and the male mold 11. The bending apparatus 10 includes a female mold 12 and a male mold 11 for sandwiching the work W.

In the first embodiment, a slide plate 14 slidable in the left-right direction is mounted on a base 13 installed in a building such as a factory. The slide plate 14 is slidably fitted to the left and right longitudinal guide poles 16 provided on both the front and rear sides of the upper portion of the base 13, and the slider portions 15 provided on both the front and rear sides of the lower surface of the slide plate 14 are slidably fitted. It is possible to slide left and right along the longitudinal direction of.

The left holder support 17 is erected on the left side of the upper surface of the base 13 with the slide plate 14 in between. On the right side of the left holder support 17 facing the slide plate 14, a male holder 18 for detachably holding the vertically elongated (vertically long) male mold 11 is provided. That is, the male mold 11 of the first embodiment is fixedly arranged on the base 13 by the male mold holder 18 and the left holder support 17 in a vertically longitudinal posture.

A right holder support 19 is erected on the slide plate 14. On the left side of the right holder support 19 facing the left holder support 17, a female holder 20 for detachably holding the vertically elongated (vertically long) female mold 12 is provided. That is, the female mold 12 of the first embodiment is arranged on the slide plate 14 in a vertically longitudinal posture by the female mold holder 20 and the right holder support 19. The female mold 12 is movable to the left and right together with the slide plate 14, the female mold holder 20, and the right holder support 19 so as to be brought into contact with and separated from the male mold 11.

Needless to say, the female mold 12 and the male mold 11 are in opposite postures between the left and right holder supports 17 and 19.

A double-acting hydraulic cylinder 22, which is an example of a linear actuator, is attached to the right side of the upper surface of the base 13 with the slide plate 14 as a driving source for sliding the female mold 12 left and right. The cylinder portion of the hydraulic cylinder 22 is fixed to the upper surface of the base 13. The piston rod 23 of the hydraulic cylinder 22 projects toward the right holder support 19. The right holder support 19 is interlocked and connected to the piston rod 23 (the tip end side of the hydraulic cylinder 22). Due to the expansion and contraction of the piston rod 23 of the hydraulic cylinder 22, the female mold 12 slides left and right together with the slide plate 14 and the right holder holding block 19 so as to come into contact with and separate from the male mold 11.

As shown in FIGS. 1 to 8, a pair of feed rollers 24 that support the work W from below and intermittently feed laterally at a predetermined pitch are arranged side by side on the lower side of the male mold 11. In this case, a gear box 25 accommodating a bevel gear mechanism (not shown) is attached to the lower right side of the left holder support 17. A pair of front and rear feed rollers 24 are rotatably supported on the right side of the gear box 25 in a cantilever shape. An electric motor 26, which is a drive source for 24 pairs of feed rollers, is provided on the rear surface side of the gear box 25.

The electric motor 26 is configured to transmit rotational power to 24 pairs of feed rollers via a bevel gear mechanism in the gear box 25. The 24 pairs of feed rollers are configured to intermittently rotate in the same direction at a predetermined pitch in conjunction with each other by rotational power from the electric motor 26 via the bevel gear mechanism in the gear box 25.

In the first embodiment, the lower arc WL1 of the fan plate-shaped work W is placed on the 24 pairs of feed rollers from above. Then, the work W is intermittently fed (transversely fed) from the back to the front side at a predetermined pitch by the 24 pairs of feed rollers.

In the bending apparatus 10 of the first embodiment, the fan plate-shaped work W is placed on 24 pairs of feed rollers, and then the female mold 12 is slid to move closer to the male mold 11 to bring the female mold 12 and the male mold 12 closer to each other. The work W is sandwiched between the mold 11 and the work W to perform a three-point bending process. Next, the female mold 12 is slid and separated from the male mold 11, and then the work W is fed by one pitch with 24 pairs of feed rollers. Then, the female mold 12 is slid and moved closer to the male mold 11 again, the work W is sandwiched between the female mold 12 and the male mold 11, and the transfer and the sandwiching pressure for one pitch are alternately repeated. By repeating such a procedure, a cone-shaped funnel component is formed from the fan plate-shaped work W.

As shown in FIG. 8, the pair of front and rear feed rollers 24 are arranged apart from each other by an equidistant D before and after sandwiching the vertically long center line L of the male type 11. Therefore, if the lower arc WL1 of the work W having a fan plate shape is placed on the 24 pairs of feed rollers from above, the radius line passing through the center O of the inner and outer circumference arcs WL1 and WL2 in the work W is vertically long in the male type 11. It can be easily overlapped with the center line L, and has high bending accuracy for forming a cone-shaped funnel part from a fan plate-shaped work W.

As shown in FIG. 3, the lower end of the female mold 12 protrudes below the lower end of the male mold 11, and the female mold 12 is slid and moved so as to be close to the male mold 11 in a pinched state. It is set to be located directly above 24 pairs of rollers. That is, in the pinched state of the female mold 12 and the male mold 11, the lower end of the female mold 12 is closer to the 24 pairs of feed rollers than the lower end of the male mold 11. Therefore, even if the lower end of the male mold 11 and the 24 pairs of feed rollers are separated, the lower end side of the female mold 12 can press the vicinity of the lower arc WL1 of the work W, and the bending process near the lower arc WL1 of the work W can be performed. Accuracy is ensured.

A plurality of damper members 27 protruding toward the male mold 11 (to the left) are formed in the central vertical groove 21 at a position facing the male mold 11 in the female mold 12 (which may be referred to as a female mold holder 20). They are provided side by side in the vertical direction at appropriate intervals. These damper members 27 are for holding and holding the work W before and after pinching, and are configured to be able to move forward and backward using the elasticity of a spring (not shown) with respect to the female holder 20.

Before and after pressing the work W between the female mold 12 and the male mold 11, even if the female mold 12 is separated from the male mold 11, the damper member 27 group maintains the contact state with the work W. The work W can be continuously sandwiched between the male mold 11 and the damper member 27 group in the thickness direction. That is, when the work W is repeatedly pressed between the female type 12 and the male type 11, the male type 11 and the damper member 27 group regardless of whether the female type 12 and the male type 11 are in the sandwiched state or the separated state. The posture of the work W is maintained by.

As shown in FIGS. 1 and 3, the upper part of the female mold 12 abuts on the upper arc WL2 of the work W from above to assist the lateral feed of the work W by the 24 pairs of feed rollers 28. Is arranged so that the height position can be adjusted. In this case, mounting holes 31 are formed in the female mold 12 on the front and rear outer sides of the female mold 12 with the central vertical groove portion 21 sandwiched therein, while mounting holes 31 are vertically arranged vertically at appropriate intervals, while the support piece portion 29 supporting each driven roller 28 has a vertically long length. The hole 30 is formed.

The driven roller 28 is fixed to the female mold 12 by superimposing the elongated hole 30 of the support piece 29 on the mounting hole 31 at a predetermined height position and screwing the fixing screw 32 into the mounting hole 31 through the elongated hole 30. NS. By superimposing the elongated hole 30 of the support piece 29 on the mounting hole 31 at the predetermined height position, the approximate height position of the driven roller 28 is set. Then, by sliding the support piece portion 29 up and down along the elongated hole 21 with the fixing screw 32 slightly loosened, the height position of the support piece portion 29 and the driven roller 28 is finely adjusted.

Before and after sandwiching the work W between the female mold 12 and the male mold 11, 28 pairs of driven rollers are in contact with the upper arc WL2 of the work W even when the female mold 12 is separated from the male mold 11. The 24 pairs of feed rollers maintain the contact state with the lower arc WL1 of the work W. It is possible to continue to hold the work W in the radial direction (height direction) between the 28 pairs of driven rollers and the 24 pairs of feed rollers. That is, when the work W is repeatedly pressed between the female type 12 and the male type 11, the male type 11 and the damper member 27 group regardless of whether the female type 12 and the male type 11 are in the sandwiched state or the separated state. In addition to the combination with, the posture of the work W is maintained by 28 pairs of driven rollers and 24 pairs of feed rollers.

As shown in FIGS. 1 to 3, a plurality of support arms 33 that support the lower arc WL1 of the work W from below are arranged around the female mold 12 and the male mold 11. Each support arm 33 includes a vertical strut 34 erected around the female and male molds, and a horizontal arm portion 35 attached to the vertical strut 34 so that the height position can be adjusted. At the time of bending, the lateral arm portion 35 of each support arm 33 supports the lower arc WL1 of the work W laterally fed by the feed roller pair 24 from below, thereby contributing to the stable transport of the work W. ..

In the first embodiment, support arms 33 are erected on both front and rear sides of the slide plate 14 sandwiching the female mold 12 and on the left side of the left holder support 17 on the upper surface of the base 13. There is.

Next, the hydraulic circuit 36 and the control structure of the bending apparatus 10 will be described with reference to FIG.

The hydraulic circuit 36 of the bending apparatus 10 includes a hydraulic cylinder 22 and a hydraulic pump 38 that supplies hydraulic oil in the hydraulic oil tank 37 to the hydraulic cylinder 22. The hydraulic pump 38 of the first embodiment is configured to be driven by the rotational power of an electric motor 39 for a pump electrically connected to a controller 42 which is a control means. The hydraulic cylinder 22 is connected to the hydraulic pump 38 via a 5-port 3-position switching type switching solenoid valve 40. The switching solenoid valve 40 has a pair of solenoid solenoids 41 electrically connected to the controller 42.

The switching solenoid valve 40 has an extension position for extending and moving the piston rod 23 of the hydraulic cylinder 22 by excitation of each solenoid solenoid 41 based on a command from the controller 42, a stop position for stopping the operation of the piston rod 23, and a piston rod. It is configured to switch and drive to a shortened position that shortens the movement of 23.

The controller 42 includes an electric motor 39 for a pump, an electric motor 26 for rotating and driving 24 pairs of feed rollers, a pair of electromagnetic solenoids 41 in a switching electromagnetic valve 40, a power switch 43 for turning on and off the power of the entire bending apparatus 10, and bending. The initial state is the start switch 44 for starting the machining work, the stop switch 45 for stopping the bending work, the emergency stop switch 46 for forcibly stopping the operation of each part of the bending device 10, the slider plate 14 and the female mold 12 (FIG. 3). The initial position sensor 47 that detects whether or not it is in (see), the movement amount detection sensor 48 that detects the movement amount (including the left and right movement limit position) of the slider plate 14 and the female mold 12, and the like are electrically connected. ..

The controller 42 is housed in an operation box (not shown) of the bending apparatus 10, and a power switch 43, a start switch 44, a stop switch 45, an emergency stop switch 46, and the like are arranged in the operation box. The initial position sensor 47 and the movement amount detection sensor 48 are arranged on the base 13 (see FIGS. 1 and 3). The hydraulic oil tank 37, the hydraulic pump 38, and the electric motor 39 for the pump are arranged at the lower part of the base 13 (see FIG. 1). In FIG. 1, the electric motor 39 for a pump is not shown.

In the first embodiment, the work of forming a truncated cone-shaped funnel component from the fan plate-shaped work W is performed by, for example, the following procedure. That is, when one end side of the fan plate-shaped work W is placed on the feed roller 24 pairs and the start switch 44 is turned on after the setting of the work W is completed, the hydraulic cylinder 22 is extended and moved to female. The mold 12 slides from the initial state (see FIG. 4) to the detached state (see FIGS. 5 and 6).

When the female mold 12 slides to the separated state, the thickness direction of the work W is sandwiched between the male mold 11 and the damper member 27 group, and the radial direction (height direction) of the work is held by 28 pairs of driven rollers and 24 pairs of feed rollers. Is pinched. That is, the posture of the work W is maintained by the male type 11, the damper member 27 group, and 28 pairs of driven rollers and 24 pairs of feed rollers.

Next, the hydraulic cylinder 22 is further extended and the female mold 12 is slid to the pinched state (see FIG. 7), and the work W is pinched between the female mold 12 and the male mold 11 in a three-point bending process. Will be executed.

Then, when the hydraulic cylinder 22 shortens and the female mold 12 slides back to the separated state (see FIGS. 5 and 6), the rotary drive of the electric motor 26 causes the feed rollers 24 pairs to interlock with each other and become the same. The work W is rotated by one pitch in the direction, and the work W is fed from the back to the front by one pitch by the rotation of 24 pairs of feed rollers.

Then, the female mold 12 is slid and moved closer to the male mold 11 again, the work W is sandwiched between the female mold 12 and the male mold 11 (three-point bending process is executed), and thereafter, the fan plate-shaped work W The transfer for one pitch and the pinching pressure are alternately repeated until the other end side of the. As a result, the fan plate-shaped work W is bent into a truncated cone cylinder shape so as to be wound around the male mold 11, and a truncated cone cylinder shape funnel component is formed from the fan plate shape work W.

As can be seen from the above description, when the bending operation is executed by the bending device 10 of the first embodiment, the work W is formed into a truncated cone shape so as to be wound around the male mold 11 with only one bending device 10. Since the bending process can be performed, it is possible to eliminate or reduce the time and effort required for the bending process using a plurality of devices as in the prior art, and therefore, the efficiency of the bending process for the work W can be improved.

Further, since the work W is wound around the male mold 11 during bending, the work W can be easily supported by the bending apparatus 10 (base 13) itself. Therefore, it is possible to easily prevent the work W from bending and deforming due to its own weight, and it is highly effective in maintaining and improving the bending accuracy.

In the first embodiment, since the feed roller 24 that supports the work W from below and intermittently feeds laterally at a predetermined pitch is provided on the lower side of the male mold 11, the work W is conveyed by one pitch. And pinching pressure can be repeated alternately, and the efficiency of bending work on the work W can be further improved.

Further, in the first embodiment, the female mold 12 is configured to be movable in contact with and detached from the male mold 11, while the male mold 11 is configured to be a fixed type, and the feed roller 24 is a fixed type. Since it is arranged on the lower side of the male mold 11, the work W can be stably placed on the feed roller 24, and the posture of the work W intermittently conveyed by the feed roller at predetermined pitches is maintained properly. , Further maintenance and improvement of bending accuracy can be achieved.

Moreover, since the male mold 11 is provided with a damper member 27 that holds and holds the work W before and after the pinching pressure, it is also highly effective in maintaining the posture of the work W during bending.

By the way, FIG. 10 shows another example of the feed roller. Similar to the first embodiment, there are a pair of front and rear feed rollers 49 of the other example, each of which is rotatably supported on the right side of the gear box 25 in a cantilever shape. Each feed roller 49 is formed in a halved shape, and is attached to a roller shaft 50 projecting outward from the right side portion of the gear box 25. Of the feed rollers 49, the roller portion 49b on the distal end side is urged by the spring 51 toward the roller portion 49a on the proximal end side. Other configurations are the same as those of the first embodiment.

In another example, the lower arc WL1 of the fan plate-shaped work W is sandwiched between both roller portions 49a and 49b of each feed roller 49. Therefore, the work W can be laterally fed more smoothly (efficiently) by the 49 pairs of feed rollers.

FIG. 11 shows another example of the damper member. The damper member 27 group in the first embodiment is configured to be able to move forward and backward with respect to the female holder 20 by using the elasticity of a spring (not shown), but the present invention is not limited to this, and some damper members 52 are not limited to this. May be fixed, or the damper member 52 may be arranged on the front, rear, outer sides of the female mold. In another example shown in FIG. 11, the damper member 52 is arranged on the front and rear outer sides of the female mold 12, and the damper member 52 at the upper and lower intermediate positions is fixedly configured. The fixed damper member 52 is arranged so that its tip position is flush with the tip of the female mold 12. Other configurations are the same as those of the first embodiment.

FIG. 12 shows another example in which the bending sensor 53 for measuring the bending shape of the work W is attached to the female holder 20. In this case, bending sensors 53 are attached to both front and rear portions of the female holder 20. The bending sensor 53 of the other example is a contact type distance measuring sensor. The sensor unit 54 of the bending sensor 53 is configured to move forward and backward by a rack and pinion mechanism. The rotation of the pinion gear (not shown) by the advancing / retreating motor 55 causes the sensor unit 54 to advance / retreat and come into contact with the work W, and the bending shape of the work W is measured from the advancing / retreating amount.

Further, although detailed illustration is omitted, the vertically elongated female mold 12 can be set in a slightly inclined posture with respect to the female mold holder 20 so that the upper side approaches the male mold 11. By adjusting the left-right tilted posture of the female mold 12 in this way, the bending dimension (bending angle) of the work W can be adjusted and set according to the size of the work W and the like.

If the bending sensor 53 is provided as in another example shown in FIG. 12, the bending dimension (bending angle) of the work W can be easily grasped. Therefore, for example, at the time of initial setting, while referring to the detection result of the bending sensor 53, It is possible to adjust and set the pushing amount of the female mold 12, the inclination angle of the female mold 12, and the like, which can contribute to the improvement of the efficiency of the bending work for the work W.

At least one bending sensor 53 may be used. The bending sensor 53 of another example shown in FIG. 12 is a contact type, but may be a non-contact type such as a laser type or an infrared type.

13 to 18 show a second embodiment of the bending apparatus according to the present invention. Here, in the second and subsequent embodiments, those having the same configuration and operation as those of the first embodiment are designated by the same reference numerals as those of the first embodiment, and detailed description thereof will be omitted.

The bending apparatus 100 of the second embodiment is basically larger than that of the first embodiment as a whole, and is a double-acting type that slides the female mold 12 left and right due to the enlargement of the apparatus. It differs from that of the first embodiment in that a pair of upper and lower hydraulic cylinders 22 is provided.

In the second embodiment, the slide plate 14 is arranged so as to straddle a pair of front and rear guide rails 101 provided on the base 13. Slider portions 15 provided on both front and rear sides of the lower surface of the slide plate 14 are fitted into a pair of front and rear guide rails 101 so as to be slidable to the left and right. That is, the slide plate 14 of the second embodiment can slide left and right along the pair of front and rear guide rails 101.

In the second embodiment, the male mold 11 is fixedly arranged on the base 13 by the male mold holder 18 in a vertically longitudinal posture. The female mold 12 is supported by the slide plate 14 in a vertically longitudinal posture by the female mold holder 20 and the right holder support 19. The female mold 12 is movable to the left and right together with the slide plate 14, the female mold holder 20, and the right holder support 19 so as to be brought into contact with and separated from the male mold 11.

As described above, the bending apparatus 100 of the second embodiment includes a pair of upper and lower double-acting hydraulic cylinders 22. In this case, a pair of front and rear support walls 99 are erected on the right side of the upper surface of the base 13 with the slide plate 14 in between. The cylinder portions of each hydraulic cylinder 22 are vertically arranged and fixed between the two support walls 99. The piston rod 23 of each hydraulic cylinder 22 projects toward the right holder support 19. The upper piston rod 23 (the tip end side of the upper hydraulic cylinder 22) is interlocked and connected to the upper part of the right holder support 19. The lower piston rod 23 (the tip end side of the lower hydraulic cylinder 22) is interlocked and connected to the lower part of the right holder support 19.

The pair of upper and lower hydraulic cylinders 22 are configured to expand and contract in conjunction with each other. By the expansion and contraction of the piston rod 23 of both the upper and lower hydraulic cylinders 22, the female mold 12 slides left and right together with the slide plate 14, the female mold holder 20 and the right holder support 19 so as to come into contact with and separate from the male mold 11.

The right holder support 19 of the second embodiment is configured to be tiltable to the left and right with the lower end side as a fulcrum. By adjusting the left-right tilted posture of the right holder support 19 and the female mold 12 in this way, it is possible to adjust and set the bending dimension (bending angle) of the work W according to the size of the work W and the like. ..

As shown in FIGS. 13 to 15, in the second embodiment, the work W is supported from below on the lower side of the female mold 12 instead of the male mold 11, and the work W is intermittently laterally fed at a predetermined pitch. The feed roller 108 is arranged so that the height position can be adjusted. In the first embodiment, one electric motor 26 rotates two feed rollers 24, but in the second embodiment, one lower rotation motor 109 rotates one lower feed roller 108. ..

The pair of front and rear feed rollers 108 and their drive mechanism have a front-rear symmetrical structure. In this case, the vertically elongated rack bars 102 and 103 pairs of fixed rails are fixed to both front and rear sides of the right holder support 19. Vertically elongated fixed rails 103 extending in parallel with the rack bar 102 are located on both left and right sides of the rack bar 102.

The fixed rail 103 pairs are equipped with a lower guide plate 104 that can move up and down along the fixed rail 103 pairs. A lower elevating motor 105 is attached to the front and rear outer surfaces of the lower guide plate 104. The rotating shaft of the lower elevating motor 105 penetrates the lower guide plate 104, and a pinion gear 106 that meshes with the rack teeth of the rack bar 102 is fixed to a protruding portion of the rotating shaft of the lower elevating motor 105. The lower guide plate 104 is configured to move up and down along the fixed rail 103 pairs by the rotation of the pinion gear 106 by the lower lift motor 105.

On the left end side of the lower guide plate 104, for example, a lower transmission case 107 having a power transmission unit such as a timing belt or a gear mechanism is attached. A lower feed roller 108 is rotatably supported on the left side of the lower transmission case 107 in a cantilever shape. A lower rotation motor 109, which is a drive source for the lower feed roller 108, is provided on the right side of the lower transmission case 107. The lower rotary motor 109 is configured to transmit rotational power to the lower feed roller 108 via a power transmission unit in the lower transmission case 107.

Each of the lower feed rollers 108 is moved up and down along a pair of fixed rails 103 by the rotational power of the corresponding lower elevating motor 105 to adjust the height position. Further, each of the lower feed rollers 108 is intermittently rotated in the same direction at a predetermined pitch by basically interlocking with each other by the rotational power of the corresponding lower rotation motor 109. When each of the lower feed rollers 108 is configured to be able to move up and down and rotate independently in this way, the feed pitch of the work W can be adjusted to a predetermined value, for example, in case the work W is slippery on the lower feed roller 108. It can be set, and even when bending a large work W, the bending accuracy can be maintained high.

A pair of front and rear feed rollers 114 are arranged on the upper side of the female mold 12 so that the height position can be adjusted. The 114 pairs of top feed rollers of the second embodiment replace the driven rollers 28 of the first embodiment. In this case, an L-shaped upper guide plate 110 in a plan view that can move up and down along the fixed rail 103 pairs is mounted on the upper part of either the front or rear fixed rail 103 pairs. The elevating structure of the upper guide plate 110 is a rack and pinion mechanism similar to the lower guide plate 104, and the upper guide plate 110 is moved up and down along the fixed rail 103 pairs by the rotation of the pinion gear 112 by the upper elevating motor 111. It is configured.

An upper transmission case 113 having a power transmission unit is attached to the left end side of the upper guide plate 110. A pair of front and rear upper feed rollers 114 are rotatably supported on the left side of the upper transmission case 113 in a cantilever shape. The upper transmission case 113 is provided with an upper rotary motor 115 which is a drive source for 114 pairs of upper feed rollers. The upper rotary motor 115 is configured to transmit rotational power to 114 pairs of upper feed rollers via a power transmission unit in the upper transmission case 113.

The upper feed roller 114 pairs are moved up and down along the fixed rail 103 pairs by the rotational power of the upper elevating motor 111 to adjust the height position. Further, the upper feed roller 115 pairs are intermittently rotated in the same direction at a predetermined pitch by interlocking with each other by the rotational power of the upper rotation motor 1115.

When the upper feed roller 114 and the lower feed roller 108 are configured to be movable, the upper feed roller 114 and the lower feed roller 108 can be moved according to the size of the work W, and can be used for bending work on the work W of various sizes. , The bending apparatus 100 can be easily adapted.

A bending sensor 119 for measuring the bending shape of the work W is arranged in the upper and lower half of the female mold 12 so that the height position can be adjusted. As the bending sensor 119, for example, a laser type or infrared type ranging sensor can be adopted. In the second embodiment, a sensor guide plate 116 capable of moving up and down along the fixed rail 103 pairs is mounted on the upper part of either the front or rear fixed rail 103 pairs. The elevating structure of the sensor guide plate 116 is a rack and pinion mechanism similar to the vertical guide plates 104 and 110, and the sensor guide plate 116 is moved up and down along the fixed rail 103 pairs by the rotation of the pinion gear 118 by the sensor elevating motor 117. It is configured as follows. A bending sensor 119 is attached to the left end side of the sensor guide plate 116.

When the bending sensor 119 is provided in this way, the bending dimension (bending angle) of the work W can be easily grasped. Therefore, for example, at the time of initial setting, the pushing amount of the female mold 12 is referred to while referring to the detection result of the bending sensor 119. And the tilt angle of the female mold 12 (right holder support 19) can be adjusted and set, which can contribute to improving the efficiency of bending work for the work W.

There may be a plurality of bending sensors 119. The number of bending sensors 119 may be set according to the size of the work W. It is also possible to arrange bending sensors 119 on both front and rear sides of the right holder support 19. In this case, the bending sensor 119 and its drive structure may be symmetrical in the front-rear direction. Further, although the bending sensor 119 of the second embodiment is a non-contact type, it may be a contact type.

Needless to say, the bending apparatus 100 of the second embodiment as described above also has the same effect as that of the bending apparatus 10 of the first embodiment.

FIG. 19 shows a third embodiment of the bending apparatus according to the present invention. While the bending apparatus 100 of the second embodiment is a vertically installed type in which the female mold 12 and the male mold 11 are vertically elongated, the bending apparatus 200 of the third embodiment is the same as that of the second embodiment. By diverting the same configuration, the female type 12 and the male type 11 are horizontally arranged. That is, the bending apparatus 1, 100, 200 of the present invention basically follows the same configuration and can be installed vertically or horizontally.

In the third embodiment, the hydraulic cylinder 22 group is erected on the base portion 202 of the hollow box-shaped housing 201, and the horizontally long lower holder support 203 and the female holder 20 are on the tip side of the hydraulic cylinder 22 group. And female type 12 are arranged. A horizontally long male holder 19 is attached to the right inner side wall of the housing 201 in a cantilever shape. The male mold 11 is attached to the lower surface side of the male mold holder 19. Therefore, even in the third embodiment, the female mold 12 is movable. The left and right feed rollers 204, 205 and their drive structures with respect to the lower holder support 203 are the same as the upper and lower feed rollers 108, 114 and their drive structures of the second embodiment.

Needless to say, the bending apparatus 200 of the third embodiment as described above also has the same effects as those of the bending apparatus 10, 100 of the first and second embodiments.

20 to 26 show a fourth embodiment of the bending apparatus according to the present invention. Like the bending apparatus 200 of the third embodiment, the bending apparatus 300 of the fourth embodiment is a horizontally placed type in which the female mold 12 and the male mold 11 are horizontally elongated. Also in the fourth embodiment, a pair of left and right hydraulic cylinders 22 are erected on the base portion 302 of the housing 301, and the lower front wall of the housing 301 is configured on the tip side (upper end side) of the pair of hydraulic cylinders 22. The lower holder support 303, the female holder 20, and the female 12 are attached. A horizontally long male holder 19 and a male 11 are attached to the lower end side of the upper front wall of the housing 301. Therefore, the female mold 12 is also movable in the fourth embodiment.

As shown in FIGS. 20 to 23, in the fourth embodiment, a pair of front and rear right feed rollers 306 that intermittently convey the work W in the front-rear direction at a predetermined pitch can adjust the left and right mounting positions on the right side of the female mold 12. Is located in. A right-handed rotary motor 307, which is a drive source, is connected to the base 306a of each right-hand feed roller 306. The right feed roller 306 pair and its drive mechanism have a front-rear symmetrical structure. In the fourth embodiment, one right-handed rotation motor 307 is configured to rotate one right-hand feed roller 306. That is, the right-handed rotary motor 307 and the right-hand feed roller 306 have a one-to-one relationship. Each right feed roller 306 is the rotational power of the corresponding right rotation motor 307, and basically interlocks with each other to intermittently rotate in the same direction at a predetermined pitch.

A pair of front and rear right feed rollers 306 are arranged on both front and rear sides of the female mold 12 with appropriate intervals in the front and rear. In this case, the left and right longitudinal holding rails 308 are screwed to the front and rear side surfaces of the female holder 20. The base insertion plate 309 of the right feed roller 306 is sandwiched between the female holder 20 and the holding rail 308. With the screws slightly loosened, the base insertion plate 309 and the right feed roller 306 can be manually slid left and right along the holding rail 308 to adjust the left and right mounting positions. If the screw is tightened with the base insertion plate 309 of the right feed roller 306 sandwiched between the female holder 20 and the holding rail 308, the left and right mounting positions of the right feed roller 306 are fixed.

On the left side of the female mold 12, a pair of front and rear left feed rollers 304 that intermittently convey the work W in the front-rear direction at a predetermined pitch are arranged in a fixed position. In this case, as shown in FIGS. 20 to 22 and 24, the base 304a of the left feed roller 304 pair is screwed to the right end side of the female holder 20. A left-handed rotary motor 305, which is a drive source, is connected to a base 304a of a pair of left-feed rollers 304. In the fourth embodiment, one left rotation motor 305 is configured to rotate two left feed rollers 304. The left-hand feed roller 304 pair is intermittently rotated in the same direction at a predetermined pitch by interlocking with each other by the rotational power of the left-hand rotation motor 305.

In the fourth embodiment, the right feed roller 306 pair is movablely configured, and the right feed roller 306 is slid left and right according to the size of the work W to bend the work W of various sizes. The processing device 300 is adapted. The left feed roller 304 pair may be configured as a mobile type, the right feed roller 306 pair may be configured as a fixed type, or both may be configured as a mobile type. The front-rear arrangement interval of 304 pairs of left feed rollers is set narrower than that of 306 pairs of right feed rollers. When forming a truncated cone-shaped funnel part from a fan plate-shaped work W, the left arc with a short arc length of the work W abuts on 304 pairs of left feed rollers, and the right arc with a long arc length is on the right. It comes into contact with 306 pairs of feed rollers. During bending, the work W is sandwiched and held by the left and right feed rollers 304 and 306 pairs. Therefore, the posture of the work W can be stably maintained even during the bending process.

In the fourth embodiment, the feed amount (pitch) of 304 pairs of left feed rollers and the feed amount (pitch) of 306 pairs of right feed rollers are independently corresponding to each arc length of the work W and the distance between both arcs. By setting, the feed pitch of the work W as a whole can be appropriately adjusted and set. Therefore, even when the large work W is bent, the bending accuracy is maintained high. Needless to say, the feed amount (pitch) of 304 pairs of left feed rollers corresponding to the shorter arc length is smaller than the feed amount (pitch) of 306 pairs of right feed rollers.

As shown in FIGS. 21 and 24, a bending sensor 310 for measuring the bending shape of the work W is arranged in the female holder 20 so that the left and right mounting positions can be adjusted. In the fourth embodiment, non-contact bending sensors 310 (distance measuring, for example, laser type or infrared type) are located on the rear surface side of the female holder 20 at two locations, one closer to the left feed roller 304 and the other closer to the right feed roller 306. Sensor) is attached. The bending sensor 310 may be a contact type.

The mounting configuration of the bending sensor 310 to the female holder 20 is the same as that of the right feed roller 306 pair. That is, by sandwiching the base insertion plate protruding downward from the bending sensor 310 between the female holder 20 and the holding rail 308 on the rear surface side and tightening the screws, the left and right mounting positions of the bending sensor 310 can be adjusted. It is fixed.

The bending sensors 310 may be arranged on the front side of the female holder 20 or may be arranged alternately on the front side and the rear surface side. The number of bending sensors 310 may be plural or one. The number of bending sensors 310 may be set according to the size of the work W. This point is the same as each of the above-described embodiments.

As shown in FIGS. 20 to 22 and 25 (a) and 25 (b), a pair of front and rear support arms 311 for supporting the work W from below are arranged at the right side of the female mold 12 so that the left and right mounting positions can be adjusted. ing. The support arm 311 of the fourth embodiment is configured as an articulated arm that can be supported from below along the bending shape of the work W, and contributes to stable transportation of the work W.

An arm drive motor 312, which is a drive source, is connected to the base 311a of each support arm 311. Each support arm 311 (articulated arm) is configured to flex upward along the curved shape of the work W by the rotational power of the corresponding arm drive motor 312. The mounting configuration of each support arm 311 to the female holder 20 is the same as that of the right feed roller 306 pair and the bending sensor 310 pair. That is, by sandwiching the base insertion plate protruding downward from the base 311a of the support arm 311 between the female holder 20 and the holding rail 308 and tightening the screws, the left and right mounting positions of the support arm 311 Is fixed.

As shown in FIG. 20, a movement amount detection sensor 313 that detects the movement amount (including the upper and lower limit positions) of the female mold 12 is arranged on the right side portion of the housing 301. As shown in detail in FIG. 25, the movement amount detection sensor 313 of the fourth embodiment includes a vertically longitudinal screw shaft 314, a ball nut 315, a bearing body 316, and a rotary encoder 317. On the right side of the housing 301, vertically elongated screw shafts 314 are arranged so as to straddle the upper and lower front walls. A ball nut 315 is screwed into the upper and lower half of the screw shaft 314. The lower side of the screw shaft 314 is rotatably fitted to the bearing body 316 so as not to slide, and a rotary encoder 317 for detecting the rotation of the screw shaft 314 is attached to the lower end side of the screw shaft 314. The ball nut 315 is detachably attached to the upper front wall of the housing 301, and the bearing body 316 is detachably attached to the lower holder support 303 constituting the lower front wall of the housing 301.

When the lower holder support 303 moves up and down due to the expansion and contraction of the hydraulic cylinder 22, the screw shaft 314 rotates about the axis by the action of the ball nut 315 fixed to the upper front wall of the housing 301. By detecting the rotation amount with the rotary encoder 317, the movement amount (including the upper and lower limit positions) of the female mold 12 can be known. The ball nut 315 and the bearing body 316 are removable from the housing 301. Therefore, it is easy to attach it to the existing bending apparatus 300 (it can be easily retrofitted) in accordance with the unitization of the female mold 12 or the male mold 11 described later and its peripheral parts.

The female holder 20 of the fourth embodiment is detachably attached to the upper end portion of the lower holder support 303 (see FIGS. 20 to 22). Then, as shown in detail in FIGS. 21 and 22, a female mold 12, a pair of left and right feed rollers 304 and 306, a pair of bending sensors 310, and a pair of support arms 311 are attached to the female mold holder 20. That is, in the fourth embodiment, the female mold 12, the left and right feed rollers 304 and 306 pairs, the bending sensor 310 pairs, and the support arm 311 pairs are unitized (attached) around the female mold holder 20. .. Therefore, the assembling work to the lower holder support 303 (lower front wall of the housing 301) of the female mold 12 can be efficiently performed. Further, by unitizing the female mold 12 and its peripheral parts, there is an advantage that it is easy to handle such as transportation and storage, and it is also easy to replace it with the existing bending apparatus 300.

It goes without saying that the female mold 12 is unitized around the female mold holder 20, but other than that, at least a pair of left and right feed rollers 304 and 306 may be included. Of course, the male type 11 and its peripheral parts may be unitized. In the case of the horizontal bending device 300, the male mold 11 and its peripheral parts are arranged on the lower holder support 303 side in consideration of the action of gravity on the work W, and the female mold 12 and the female mold holder 20 are arranged. It will be arranged on the lower end side of the upper front wall of the housing 301. It suffices if the male type 11 and at least the left and right feed rollers 304 and 306 are unitized around the male type holder 18. If it is a vertical bending apparatus, either male or female side may be unitized, or both may be unitized.

By the way, in the fourth embodiment, since the upper front wall of the housing 301 that supports the male mold 11 and the male mold holder 18 partitions the space above the male mold 11 back and forth, the fan plate-shaped work W is divided by half. Bending to form a truncated cone-shaped part, or bending a rectangular plate-shaped workpiece in half to shape a cylindrical part. The bending apparatus 300 of the fourth embodiment also has the same effects as those of the previous embodiment.

The configuration of each part in the present invention is not limited to the illustrated embodiment, and various changes can be made without departing from the spirit of the present invention. For example, with respect to the bending machines 10, 100, 200, and 300, it goes without saying that if a rectangular plate-shaped work is used instead of the fan plate-shaped work W, the bending process can be performed in a cylindrical shape to form a cylindrical part. .. Further, the bending apparatus 10, 100, 200, 300 can also form screw blades (spiral, see FIGS. 27 (a) and 27 (b)) by changing the shapes of the female mold 12 and the male mold 11.

W Work WL2 Upper arc 10,100,200,300 Bending device 11 Male 12 Female 13 Base 14 Slide plate 17 Left holder support 18 Male holder 19 Right holder support 20 Female holder 22 Hydraulic cylinder 24 feed Roller 27 damper member

The bending apparatus of the present invention includes a female mold and a male mold for sandwiching a plate-shaped work, and a conical base cylinder so that the work is wound around the male mold by the cooperation of the female mold and the male mold. It can be bent into a shape or a cylinder, and the female mold or the male mold is provided with a feed roller that feeds while supporting the work .

In the bending apparatus of the present invention, the feed roller may be configured to intermittently feed the work at a predetermined pitch . It is desirable that a plurality of the feed rollers are provided in order to stably support the work.

Claims (9)

It has a female type and a male type that sandwich the plate-shaped work.
By the cooperation of the female mold and the male mold, it is possible to bend the workpiece into a truncated cone shape or a cylindrical shape so as to wrap around the male mold.
Bending machine. The female mold or the male mold is provided with a feed roller that supports the work and intermittently feeds the work at a predetermined pitch.
The bending apparatus according to claim 1. The female mold is configured to be movable in contact with and detached from the male mold, while the male mold is configured to be fixed.
The feed roller is arranged in the male shape,
The bending apparatus according to claim 2. The female mold or the male mold is provided with a damper member that presses and holds the work before and after pinching.
The bending apparatus according to any one of claims 1 to 3. The female mold or the male mold is detachably supported by the holder support, and the mold attached to and detached from the holder support and the feed roller are unitized.
The bending apparatus according to claim 2. In addition to the mold attached to and detached from the holder support and the feed roller, a bending sensor for measuring the bending shape of the work is included in the unitization.
The bending apparatus according to claim 5. In addition to the mold attached to and detached from the holder support and the feed roller, a support arm that supports the bent shape of the work is included in the unitization.
The bending apparatus according to claim 5. The feed roller is configured to be adjustable in mounting position along the longitudinal direction of the female or male mold.
The bending apparatus according to claim 2. The feed rollers are arranged on both ends in the longitudinal direction of the female mold or the male mold, and the work is sandwiched and held by both feed rollers.
The bending apparatus according to any one of claims 2, 5 to 8.

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