JP4211989B2 - Through-hole punching mechanism for roll forming strips - Google Patents

Description

  The present invention relates to a roll punching mechanism for a roll forming strip, and more specifically, punching that cannot be achieved by forming a series of rolls at a predetermined position of a strip that is sequentially rolled into a desired shape while moving a rolling forming line. The present invention relates to a through-hole punching mechanism for a strip material which can be operated before a molded product is sent out from a pass line.

  For example, a deck plate 32 manufactured by sequentially deforming a thin steel plate (strip) 31 from the state of the width Wi as shown in FIG. 12 from the top to the bottom is in a coiled state as shown in FIG. The strip 31 is fed from the uncoiler 33, and the strip is fed to a pass line 34 in which a number of forming rolls are lined up, rolled and formed into a predetermined shape, and then cut to an appropriate length. The deck plate 32 formed in this way has a width Wf of about 2.5 meters, for example, consisting of a ridge portion 32m, a valley portion 32v, and a hypotenuse portion 32s connecting them as shown in the lowermost stage of FIG. However, the depth with the constant cross section is given to about 2 meters, and it is used to construct a ceiling or an upper floor by erection between steel beams.

  As shown in FIG. 14A, the deck plate 32 forms a large surface in sequence by overlapping the left end of the deck plate 32R placed on the right with the right end of the deck plate 32L placed on the left. Concrete is placed on the top surface of such a deck plate, and a composite floor board made of metal and concrete can be formed. However, the deck plate can be used as a roofing material as it is, or it can be screwed directly. In this case, as shown in FIG. 14B, if a screw lower hole 36 is made on the left side of the right deck plate 32R, the right end of the left deck plate 32L shown in FIG. When integrating, the tapping screw 37 can be easily inserted.

  Such screw holes are formed by punching with a combination of punches and dies, both round holes and long holes, and may be formed by a series of forming rolls arranged in a rolling line. Can not. This is because the roll is formed without removing the material, and cannot be formed to remove the material by cutting or punching. Therefore, the pilot holes for screws cannot be provided in the rolling forming line. Eventually, the position predicted at the stage of the strip material before rolling, that is, δ from the side edge of the strip material (the uppermost figure in FIG. 12). (See Fig. 3)), a hole is made at a position close to the inside, or a predetermined position is made after the molded product is formed.

  If it is going to make a hole after it becomes a molded product such as a deck plate, the products are handled one by one, and this operation is time-consuming for the work content. Furthermore, if it is going to process on the extension of a rolling forming line, it will be forced to introduce a large-scale equipment for making a hole in a bulky product by forming, and the length of the line will be inevitably increased.

  On the other hand, when drilling holes in the strip before rolling, if the treatment is for strips that move out of the uncoiler, the punching mechanism must be moved according to the moving speed, and the structure is not complicated. Absent. Further, the speed of the punching operation and the flow in the rolling forming line may not coincide with each other. As a result, as shown in FIG. It is also necessary to loosen the material.

  For example, when the punching device 38 is installed on the upstream side of the rolling forming line, a pit 40 is provided between the punching device and the rolling forming line 39 to loop the band material immediately after the hole 36 is opened. Keep it. In addition, when the uncoiler 33 continuously feeds the strip and reaches the punching device 38 to stop the movement of the strip and make a hole, a material feeding mechanism 41 that requires a large amount of power is introduced into the punching device. Or a pit 42 is required between the uncoiler 33 and the punching device 38. For example, if two pits and a punching device are installed upstream of the rolling forming line, the production line will become longer and longer.

  By the way, if the punching operation can be performed in accordance with the flow of the strip during rolling, the punching device can be simplified and the production line can be shortened. Although not directly related to the rolling forming line, for example, there is a flying shear as an apparatus for sequentially cutting a strip steel into a certain length. In this cutting machine, the cutting blade is moved so as to be synchronized with the movement of the steel strip, so that the shape of the cutting edge is not disturbed. In general, the blade is attached to one peripheral surface of each of a pair of drums rotating in a space above and below the flowing steel strip so as to extend in a direction crossing the steel strip. If speed control is performed to cause the gear train for driving these drums to perform a special motion, a steel strip having an arbitrary length can be obtained. An example of such a rotating-running synchronous shearing device is described in, for example, Japanese Patent Publication No. 63-51806.

By using the principle of synchronous shear between rotating runs, if a punch instead of a cutting blade is attached to the upper drum and a die instead of the cutting blade is attached to the lower drum, there is no need to make a hole in the strip. Control mechanisms and control operations are extremely complex, and it is necessary to introduce equipment that is too expensive to be used for punching holes. In the synchronized shearing operation, the speed control of the drum for cutting is related to the feeding of the steel strip, but in order to be able to change the cutting length in several ways, This is because the actual moving speed is not directly acquired. Therefore, it is necessary to separately supply power for the punching process, and there is a problem that energy saving cannot be promoted.
Japanese Examined Patent Publication No. 63-51806

  The present invention has been made in view of the above problems, and its purpose is to directly acquire the speed at which the strip moves from the strip and punch the hole so as to synchronize with it, and for the punching operation. There is no need to supply new power only, making it easier to save energy in the production facility, and by incorporating the punching operation into the rolling forming line, lengthening the production line and securing the space for the punching mechanism can be suppressed. Another object of the present invention is to provide a roll punching mechanism for a roll forming belt material that realizes continuous punching while maintaining a constant pitch even in punching operation.

  The present invention is a series of steps before a molded product is sent out from a pass line to a predetermined position of a strip that is passed through a rolling forming line having forming rolls arranged in series and is successively roll-formed into a predetermined shape. The present invention is applied to a through-hole punching mechanism for a roll-forming belt member that performs a punching process that cannot be performed by forming with a roll. The feature is that, referring to FIG. 1, the upper side of the roll pair positioned on the entrance side of the pass line 2 is positioned at substantially the same level and rotated by the sliding contact force with the moving strip 4. The upper frame 7 that moves up and down by an eccentric shaft 6 fixed to the shaft body 5a of the roll 5, and the position below the strip 4 and directly below the vertical movement space of the upper frame 7 and the influence of the movement of the strip 4 The upper frame 10a having the lower frame 8 that is stationary without being subjected to the movement and the die 14 that opens upward is positioned on the lower surface of the strip 4 that flows through the pass line 2, and reciprocates on the lower frame 8 in the pass line direction. A flat pad 12 having a movable die carrier 10 and a lower surface 12a that is separated from and in contact with the upper surface of the band material 4 flowing through the pass line 2 and temporarily holds the band material 4 in cooperation with the upper surface of the die carrier 10. And that hula The elastic body 19 positioned above the pad 12 and suspended between the pad 12 is compressed by the lowering of the upper frame 7 and the flat pad 12 is pushed down or separated from the flat pad by the elastic force released by the rising. And a punch holder 11 having a punch 13 that penetrates the flat pad 12 up and down, enters the die 14 and punches through holes in the strip 4, and can reciprocate the lower surface of the upper frame 7 in the pass line direction. The punch carrier 9 is provided at a position deviated from the side edge of the band member 4, and one end portion in a vertical posture is fixed to the die carrier 10 or the punch carrier 9, and the other end portion is attached to the punch carrier 9 or the die carrier 10. The punch carrier 9 and the die carrier 10 are always inserted in the pass line direction so as to be slidably fitted in the provided hole 10b. It includes a connecting member 20 to the body. Then, when the strip is sandwiched between the flat pad 12 and the die carrier 10, the punch holder 11 can also follow the movement of the die carrier 10 using the propulsive force of the strip 4.

  Two punches 13 arranged in the pass line direction are mounted on the punch holder 11, and the circumferential length of the upper roll 5 is set to twice the punch interval Lp.

  An actuator 21 is provided that returns the die carrier 10 and the punch carrier 9 that have been integrally advanced by the connecting body 20 to the initial position.

  The flat pad 12 is suspended from the punch holder 11 via a suspension pin 18, and one end of the suspension pin is fixed to the punch holder 11 or the flat pad 12. The shaft portion 18a is slidably fitted into the flat hole 12 or punch hole 11a provided in the punch holder 11, and an enlarged diameter portion 18b that prevents the shaft portion 11a from coming out from the hole 11a is provided at the tip of the shaft portion.

  As shown in FIG. 2, the upper frame 7 that moves up and down is supported by an eccentric shaft 6 that is positioned on the entrance side of the pass line 2 and fixed to the shaft body 5 a of the two upper rolls 5 arranged side by side. Good. The diameters of the two upper rolls 5 are the same, and the rotation is held at the same speed by the tuning gear train 22.

  According to the present invention, the upper frame that moves up and down by the eccentric shaft fixed to the shaft body of the upper roll that rotates by the sliding contact force with the moving strip is provided with the punch holder in which the punch for punching the through hole in the strip is mounted. Therefore, the upper frame can be moved up and down in conjunction with the movement of the strip using the rotation of the upper roll. Therefore, the punching speed of the through holes is always synchronized with the speed of the band material, and the drilling to a predetermined position is ensured.

  Since the power for punching is supplied by the upper roll that converts the movement of the strip into rotation, the driving force of the strip flowing in the rolling forming line can be used, and it is newly added for the vertical movement of the punch. No need to apply power. Needless to say, the energy saving of the production equipment is achieved, and the shortening of the production line and the bulk of the apparatus can be suppressed by incorporating the punching mechanism into the rolling forming line.

  A die that can be reciprocated in the direction of the pass line with the upper surface with a die that opens upward located on the lower frame that is positioned just below the space in which the upper frame moves up and down and is stationary. A flat pad having a lower surface that is separated from and in contact with the upper surface of the carrier and the die carrier and temporarily sandwiches the band material in cooperation with the upper surface of the die carrier is provided so as to be able to reciprocate with respect to the upper frame. Therefore, before the punching operation is started by the punch, the flowing strip can be held between the die carrier and the flat pad, and the punch holder that moves together with the flat pad can follow the movement of the strip. Punching takes some time, but the band, punch, and die move at the same speed during that time, so there is no twisting between the punch and the band during drilling, and a perforated hole of the specified shape Is formed.

  The punch holder is located above the flat pad, and an elastic body is suspended between the punch pad and the elastic body compressed while the flat pad is pushed down by the lowering of the upper frame. When released, the punch holder is separated from the flat pad using the elastic force. Accordingly, the punch can penetrate the flat pad up and down, enter the die opened at the upper surface of the die carrier, punch the through hole in the band member, and then retract the punch holder earlier than the flat pad. Therefore, the punch is released from the strip before the flat pad unrolls with the die carrier, and the punch after punching does not interfere with the continuously moving strip. It won't be damaged or damaged by force.

  The punch holder, flat pad, and die carrier can be moved together in the pass line direction in a state in which they can be separated from each other by a connecting body provided at a position off the side edge of the band material. They will always move at the same speed and at the same time. Therefore, when the strip is sandwiched between the flat pad and the die carrier, the punch holder also moves together with the strip, and the punching operation by the punch is not hindered during advance. Moreover, since it can be moved integrally when returning to the initial position after making the hole, the posture is adjusted before the next punching cycle is entered, and thereafter the same operation is smoothly repeated.

  The above-mentioned connecting body is for moving the punch holder, the flat pad, and the die carrier integrally, one end of the vertical posture is fixed to the die carrier or the punch carrier, and the other end is attached to the punch carrier or the die carrier. Since the punch carrier is inserted into the provided hole so as to be slidable, the punch carrier is allowed to move in an integrated manner in the pass line direction while allowing the punch carrier to move up and down with respect to the die carrier. Not only that, the flat pad descends in advance of the punch holder, the punch holder approaches the descending flat pad to enter the punching operation, or the punch carrier is moved away from the die carrier to finish the punching operation. The operation of waiting for the next punching can be realized with a very simple configuration.

  If two punches lined up in the pass line direction are mounted on the punch holder and the circumference of the upper roll is set to be twice the punch mounting interval, the rear through hole and the next of the punched pair The distance between the pair of punched holes and the front through hole can be made equal to the punch attachment distance in the punch holder, and as a result, the through holes having the same distance can be obtained.

  If the die carrier and punch carrier integrated by the coupling body are returned to the initial position by providing an actuator, the punching processing cycle is completed immediately after the band material is unpinned by the flat pad and the die carrier. It can be quickly returned. It is possible to wait at the initial position until the next punching process cycle starts and to smoothly repeat the punching operation.

  If the flat pad is suspended from the punch holder via the suspension pin with the enlarged diameter portion, the flat pad is not dropped or dropped from the punch holder by the expanded diameter portion. The maximum distance between the two can be defined by the length of the shaft portion, and the punch holder can be allowed to approach the flat pad. There is no variation in the amount of separation of the flat pad from the punch holder, and the time required for the flat pad to work together with the die carrier to hold the belt and the time until the punch enters the punching operation is always the same. The sequence of the punching cycle is stabilized.

  If the upper frame that moves up and down is supported by an eccentric shaft fixed to the shaft of two upper rolls that are lined up one after the other, the posture of the upper frame is maintained horizontally by using the forming roll in the rolling line. Therefore, it is not necessary to bring a separate horizontal holding mechanism to the rolling forming line. If the two upper rolls have the same diameter and the rotation is kept at the same speed by the tuning gear train, the two eccentric shafts always rotate in phase, and the upper frame moves horizontally. Can always be reproduced reliably.

  Below, the through-hole punching mechanism of the strip for roll forming concerning the present invention is explained in detail, referring to drawings showing an embodiment. FIG. 1 is a structural diagram of a principal part of a mechanism for performing a punching process that cannot be performed by forming with a series of rolls in a rolling forming line. This is because a part of the forming rolls 1 arranged in a series as shown in FIG. 13B is used before the molded product is sent out from the pass line 2, and the through hole 3 (FIG. 11E). Can be sequentially given at regular intervals. As a result, the holes can be punched in synchronism with the flow of the strip 4, but it is not necessary to supply new power for that purpose, and energy saving in production, shortening of the line, simplification of the apparatus, etc. are achieved. .

  The mechanism for realizing it mainly consists of the elements listed below. Details of the individual elements will be described later. In order to grasp the outline of the configuration, reference is made to FIG. First, there is an upper frame 7 that moves up and down by a swinging motion of an eccentric shaft 6 fixed so as to surround the shaft body 5 a of the upper roll 5, and a lower frame 8 is disposed below the upper frame 7.

  A punch carrier 9 and a die carrier 10 are provided between the upper frame 7 and the lower frame 8. The punch carrier 9 includes a punch holder 11 and a flat pad 12, and the former includes a punch 13 for punching the through hole 3 (see FIG. 11 (e) and the lowermost stage in FIG. 12) as shown in FIG. The latter functions in cooperation with the die carrier 10 so as to sandwich the strip 4. The die carrier 10 is provided with two dies 14 as receiving metal fittings that are perforated by punch 13.

  More specifically, the upper frame 7 is positioned at substantially the same level as the upper roll 5 of the roll pair positioned on the entrance side of the pass line 2 as shown in FIG. 2, and as described later with reference to FIGS. By moving up and down in conjunction with the rotation of the upper roll 5 that rotates by the sliding contact force with the moving strip 4, it moves away from the lower frame 8. Note that the upper roll 5 here refers to two of the forming rolls 1 arranged side by side on the most upstream side, and may be rolls newly added to the pass line, or originally lower each. You may utilize what is provided for taking the curvature of the strip | belt material 4 drawn | fed out with the side roll 15 from the uncoiler 33 (refer FIG. 13).

  As described above, two upper rolls 5 are used to move the upper frame 7 up and down (see FIG. 2), but a mechanism (not shown) that keeps the posture of the upper frame 7 horizontal. If it is provided separately, it is not impossible to use only one of the upper rolls 5. However, if the eccentric shaft 6 fixed to the shaft body 5a of the two upper rolls 5 is supported in phase, the upper frame 7 is kept horizontal by using the forming roll in the rolling forming line. It is possible to move up and down as it is, and it becomes unnecessary to equip the rolling forming line with a horizontal holding mechanism. As a matter of course, the same diameter is adopted for the two upper rolls, and if the rotation is kept at the same speed by the tuning gear train 22 composed of the three gears 22A, 22B, 22C, the two eccentric shafts 6 are always The upper frame 7 always reproduces the up-and-down movement while maintaining the level.

  The lower frame 8 is located immediately below the vertical movement space of the upper frame 7 and is in an immobile state without being affected by the movement of the strip 4. That is, although it is located at substantially the same level as the lower roll 15, it is not affected by the rotation of the lower roll that is rotated by the sliding contact force with the moving strip 4. The upper frame 7 is integrated with the shaft body 5a of the upper roll through a key 16 for fixing the eccentric shaft 6. However, as clearly shown in FIG. Since it is installed between the roll 1 and one roll chock 17A, the shaft body 15a of the lower roll 15 passes therethrough, but has no relation to the operation of the lower roll 15.

  As described above, the upper frame 7 is interlocked with the rotation of the upper roll 5 while the lower frame 8 is in a stationary state because the punch carrier 9 provided between the upper frame 7 and the lower frame 8 is This is because it is sufficient to support the latter of the die carriers 10. That is, as shown in FIG. 1, the die carrier 10 has an upper surface 10 a having a die 14 that is open upward and is positioned on the lower surface of the strip 4 that flows through the pass line 2, and can reciprocate in the pass line direction. This is because the lower frame 8 only needs to be able to move the die carrier 10 on the upper surface 8a by providing a lower guide rail 8r (see FIG. 2 and FIG. 3A). .

  The flat pad 12 which is an element of the punch carrier 9 is separated from and in contact with the upper surface of the strip material 4 flowing through the pass line 2, and temporarily cooperates with the upper surface 10a of the die carrier 10 shown in FIG. The lower surface 12a is sandwiched between the two. The punch holder 11, which is another element, is provided with a punch 13 and is located above the flat pad 12. After the punch 13 has penetrated the hole 12 b of the flat pad 12, the punch holder 11 enters the die 14 of the die carrier 10, and A through hole such as a round hole or a long hole is formed in 4.

  A suspension pin 18 and an elastic body 19 are interposed between the punch holder 11 and the flat pad 12. The flat pad 12 is kept suspended from the punch holder 11 by the suspension pins 18 and is placed in a state in which the flat pads 12 can be separated from each other by an elastic body 19 such as a coil spring. That is, the coil spring 19 is compressed by lowering the upper frame 7 and the flat pad 12 is pushed down, or the punch holder 11 can be separated from the flat pad 12 by the elastic force generated when the compression is released by raising. ing.

  Although the flat pad 12 can be suspended from the punch holder 11 by using the coil spring 19, as shown in FIG. 1, the lower end portion of the suspension pin 18 in the vertical posture is screwed to the flat pad 12, for example. Then, if the shaft portion 18a is slidably fitted into the bore hole 11a provided in the punch holder 11 and the enlarged diameter portion 18b is formed at the distal end of the shaft portion to prevent the shaft portion 18a from falling off, the expanded diameter portion As a result, the flat pad 12 does not fall or fall off from the punch holder 11.

  The maximum amount of separation between the flat pad 12 and the punch holder 11 can also be defined by the length of the shaft portion, and the punch holder 11 is allowed to approach the flat pad 12. Since there is no variation in the amount of separation of the flat pad 12 from the punch holder 11, the time required for the flat pad 12 to hold the strip 4 in cooperation with the die carrier 10, and thereafter the punch 13 enters a punching operation. The time until can be made unchanged. Reproduction of individual operations in the punching cycle and the accuracy of the timing are maintained.

  As described above, the punch holder 11 is provided with the two punches 13 arranged in the direction of the pass line 2, but the circumferential length of the upper roll 5 is given a double length of the punch interval Lp. Thus, if the distance between two punches arranged in the pass line direction is half the circumference of the upper roll, that is, if the diameter of the upper roll is D and Lp is πD / 2, a pair punched at a pitch of πD / 2 The distance Lb between the rear through-hole 3M (see FIG. 11 (e)) and the position where the front through-hole 3N of the pair punched next is opened can also be πD / 2, As a result, all the intervals between the through holes can be kept the same.

  A coupling body 20 for integrating the punch carrier 9 and the die carrier 10 so as to move along the pass line 2 is provided at a position deviated from the side edge of the strip 4 as shown in FIG. It is done. The punch carrier 9 and the die carrier 10 are integrally moved forward together with the band material 4 at the same speed at the same time, and an actuator 21 for returning them to the initial position is also provided. The entire through hole punching mechanism 23 including these elements is installed between the molding roll 1 and the roll chock 17, for example, the left chock 17 </ b> A.

  The punch carrier 9 is always integrated with the die carrier 10 and can reciprocate in the pass line direction along an upper guide rail 7r (see FIG. 2) formed on the lower surface of the upper frame 7. Although various means and structures can be given as the connecting body 20 that realizes the forward movement, as shown in FIG. 1, the upper end portion of the vertical posture is fitted to the punch holder 11 and fixed by a destructive or screw structure or the like. The shaft portion 20a may be a rod or pin that is slidably inserted into the flat pad 12 and the bores 12c and 10b provided in the die carrier 10.

  When the strip is sandwiched between the flat pad and the die carrier, the punch holder is also moved together with the strip, and the punching operation by the punch is not hindered during advancement. In addition, since it can be moved together when returning to the initial position after making a hole, it becomes easy to prepare the posture before entering the next punching cycle, and the same operation is repeated smoothly thereafter. Will be.

  That is, not only the integral movement of the punch carrier 9 and the die carrier 10 in the direction of the pass line is always guaranteed, but the vertical separation of the punch carrier 9 from the die carrier 10 is allowed. The flat pad 12 is lowered together with the punch holder 11, the punch holder 11 is brought close to the flat pad 12 that is in close contact with the band material 4, and a punching operation is started, or the punch carrier 9 is separated from the die carrier 10 to make a hole. The operation of finishing and retracting together with the flat pad 12 for the next punching can be realized with a very simple configuration.

  An actuator 21 for returning the punch carrier 9 and the die carrier 10 that are integrally advanced by the connecting body 20 to the initial position is attached to the lower frame 8 (see FIG. 1). An expression pulling mechanism (not shown) or the like may be used instead. However, if the pull-back operation is performed by the actuator, it can be quickly returned by the actuator 21 immediately after the band material 4 is nipped by the flat pad 12 and the die carrier 10 until the punching processing cycle is completed. . By waiting at the initial position until the next punching processing cycle starts, the punching operation can be smoothly repeated without losing the timing.

  Such an actuator 21 may be a light-powered drive device such as an air cylinder as well as hydraulic power. Compared to a roll driven by an electric motor, such as a material feed mechanism denoted by reference numeral 41 in FIG. 13A, the cost can be reduced significantly. A single-acting type is sufficient from the viewpoints of equipment installation and operation. The forward movement of the punch carrier 9 and the die carrier 10 does not have to rely on the cylinder because the propulsive force of the strip 4 is used, and it only needs to be operated for pulling back during the backward movement. The upper frame 7 not only moves up and down due to the swinging of the eccentric shaft 6 but also moves back and forth, so that it is convenient in the sense that the upper frame 7 is left unloaded while the punch carrier 9 and the die carrier 10 are moving forward.

  In such a through-hole punching mechanism, a forming process is applied to the strip material flowing through the rolling forming line. Several are used to utilize the moving propulsion force of the strip. The present invention has been completed on the basis of the knowledge that, if synchronized with the speed, it is possible to perform synchronous drilling without running complicated controls and mechanisms.

  Although the structure of the mechanism has been described in detail above, the operation of the through-hole punching mechanism will be sequentially described next. Referring to FIG. 4, (a) shows the state at the start of the punching cycle, and punch carrier 9 and dice carrier 10 are in the initial positions. Two of the upper rolls 5 of the forming rolls 1 have the center 6 a of the eccentric shaft 6 at the highest position, and the upper frame 7 is in the state farthest from the lower frame 8.

  FIG. 4B shows a state in which the upper roll 5 is rotated 120 degrees counterclockwise as the strip 4 advances. As a result of the swinging movement of the center 6a of the eccentric shaft 6, the upper frame 7 takes a position slightly shifted to the lower left from the initial position of the two-dot chain line. Incidentally, the lower roll 15 (see (a) of FIG. 4) also rotates due to the movement of the band material 4, but does not affect the upper frame 7 or the lower frame 8, so the lower frame 8 remains in the initial position. It will not move after that. As the upper frame 7 is slightly retracted, the punch carrier 9 and the die carrier 10 integrated in the pass line direction by the connecting body 20 are also slightly retracted. The inside of the single-acting cylinder 21 is open to the atmosphere, and the cylinder pressure does not act so that the backward movement is not disturbed.

  At that position, the upper frame 7 is lowered as described above, but the amount of the lower frame 7 is determined so that the flat pad 12 starts to come into close contact with the upper surface of the strip 4 as shown in FIG. At this time, the lower surface 12 a of the flat pad 12 comes into contact with the strip 4 placed on the upper surface 10 a of the die carrier 10. When the upper roll is further rotated from this state thereafter, the punch holder 11 starts to compress the coil spring 19, so that the adhesive force is enhanced, and the punch carrier 9 and the die carrier 10 strongly hold the belt material 4, and each is shown in FIG. It moves in the direction of the pass line along the upper guide rail 7r and the lower guide rail 8r shown.

  When the upper roll shaft 5a rotates up to 135 degrees as shown in FIG. 4C, the upper frame 7 advances slightly. On the other hand, the punch carrier 9 and the die carrier 10 move forward while being dragged by the strip 4. As shown in FIG. 7 in which (c) is enlarged, the punch holder 11 is lowered by an amount equal to the amount of descent at the center of the eccentric shaft 6 corresponding to 15 degrees rotation of the shaft body 5a and approaches the flat pad 12. At this point, the punch 13 reaches the lower end of the hole 12 b of the flat pad 12, and eventually touches the upper surface of the strip 4. Needless to say, since the punch holder 11 is also moved at the speed of the strip 4 together with the flat pad 12, the tip of the punch 13 does not move relative to the strip 4. There is no wrinkle on the surface.

  When the shaft body 5a rotates 180 degrees, the upper frame 7 that has been retracted to the maximum at 90 degrees returns to the initial position in the pass line direction as shown in FIG. At this time, the upper frame 7 takes the lowest position, and as shown in FIG. 8, the punch 13 punches the strip 4 and then enters the die 14 most deeply. In the meantime, the punch 13 is moving at the same speed as the strip 4 and there is no change in the relative position of the punch and the strip in the pass line direction. The punched piece is discharged through the chute 24 and the like.

  When the shaft 5a rotates 225 degrees, the upper frame 7 slightly moves forward, but the punch carrier 9 and the die carrier 10 are still accompanied by the belt material 4 regardless of this. However, since the upper frame 7 is slightly raised, the punch holder 11 returns to the same position as when it is 135 degrees, and the tip of the punch 13 is raised by the restoring force of the coil spring 19 to the position where it is pulled out from the strip 4 as shown in FIG. Eventually, the punching operation is performed by the punch during the rotation of 45 degrees before the 180 degrees, and the punch is pulled out during the subsequent 45 degrees.

  In this way, the punch holder 11 retracts earlier than the flat pad 12 after penetrating the flat pad 12 up and down and entering the die 14 opened at the upper surface of the die carrier 10 to punch the through hole 3 in the band material 4. Therefore, the punch 13 is separated from the band material 4 before the flat pad 12 is unfastened with the die carrier 10, and the punch that has finished drilling interferes with the band material that continues to move. Thus, there is no useless force on each other and no damage or damage.

  When the shaft body 5a rotates 240 degrees, it becomes as shown in FIG. That is, the upper frame 7 still advances slightly, but the punch holder 9 and the die carrier 10 advance greatly. By further raising the upper frame 7, the punch holder 11 is separated from the flat pad 12 as shown in FIG. 10. Since the punch 13 is also raised, the coil spring 19 is restored to the maximum allowable extent and extended away from the strip 4. When the lower surface of the enlarged diameter portion 18a of the suspension pin 18 is seated on the top edge of the hole 11a, the punch holder 11 stops being separated from the flat pad 12. That is, if the shaft 5a further rotates, the flat pad 12 rises together with the upper frame 7, and the flat pad 12 leaves the strip 4 at that time.

  Although the belt material 4 still moves, the punch carrier 9 and the die carrier 10 that are constrained in the pass line direction by the connecting body 20 finish the clamping of the belt material 4, so that the punch carrier 9 and the die carrier 10 are 240 Left in the position of the degree. Although the single-acting air cylinder 21 shown in FIG. 5B is in a fully extended state, compressed air is supplied and the backward stroke starts. The shaft body 5a remains to rotate 120 degrees, but the air cylinder 21 pulls back the punch carrier 9 and the die carrier 10 in a shorter time than that required. The time point at which the upper roll has completed one rotation is shown in FIG. 5C. At this point, the air cylinder 21 is brought into an unloaded state. It can be seen that the strip 4 is still progressing and two of the through holes 3 are further advanced.

  Incidentally, since the upper roll 5 and the lower roll 15 hold down the band material 4 strongly by the reduction device 25 (see FIG. 2) attached to each roll chock 17, between each roll and the band material. Unexpected slip does not occur. Furthermore, since the synchronization of the rotation is achieved by the tuning gear train 22, the vertical movement of the upper frame 7 is also caused by the movement of the belt material when the shaft 5a rotates at 120 °, 135 °, 225 °, and 240 °. Interlocks without shifting. In any cycle, the punching operation is accurately reproduced at the same timing.

  FIG. 11 summarizes the above operations, and 480 degrees, that is, 120 degrees in the next cycle is shown in (d), and 495 degrees, which is 135 degrees at the start of punching in that cycle, is shown in (e). . The position where the punch 13 is in contact with the strip 4 at 495 degrees is the position of the through hole in the next cycle. As described above, if the interval Lp where two punches are arranged is set to be half the circumference of the upper roll, the rear through-hole 3M of the pair punched at a pitch of πD / 2 is punched next. The distance Lb between the pair of front through holes 3N is also πD / 2, and all the distances between the through holes 3 are the same. This is because the time from the start of punching in the previous cycle to the start of punching in the next cycle matches the time required for one rotation of the upper roll.

  If the molded deck plate is cut so as to have a length of πD, a through hole is provided at the same position on any deck plate. By the way, if the rotation of the upper roll is doubled or it is transmitted to the upper frame by adopting a 1/2 diameter roll, etc., if Lp is πD / 4, the through hole is made by one rotation of the upper roll. Four can be opened, and the distance between any through holes is the same. In other words, the punching operation without this rule does not determine the position of the through hole as long as the deck plate is cut to the same length.

  The single-acting cylinder 21 (see (a) of FIG. 3), which is the above-mentioned actuator, may be attached to the upper frame 7 instead of the lower frame 8. However, the air hose is connected to the stationary lower frame 8 because of the air hose. It is preferable to wear it (see FIG. 1). There is no particular problem in reversing the posture, and the air drive may be changed to a pushing operation instead of the pulling operation for returning the punch carrier or the like. In FIG. 3 (a), since the punch carrier 9 is supported by the upper frame 7, support sliders are formed on the upper left and right sides of the punch holder 11. However, as shown in FIG. May be suspended. In any case, it is sufficient that smooth movement is ensured by lubrication or the like.

  As can be seen from the above description, the upper frame can be moved up and down in conjunction with the movement of the strip using the rotation of the upper roll. The punching speed of the through hole is always synchronized with the speed of the band material, so that the punching at a predetermined position is ensured. Since the punching process depends on the rotation of the upper roll which converts the movement of the strip into rotation, the driving force of the strip flowing through the rolling forming line is used, and there is no need to supply new power for punching. . This greatly contributes to energy saving in production facilities, and by incorporating a punching mechanism in the rolling forming line, shortening of the production line and bulkiness of the apparatus can be suppressed.

  In addition, in the example of FIG. 1 etc., one end part of the perpendicular | vertical attitude | position is fixed to the punch carrier 9, and the other end part was inserted in the hole 10b provided in the die | dye carrier so that sliding connection was possible. It was a rod. However, although not shown, it is possible to adopt an inverted structure in which one end portion in a vertical posture is fixed to the die carrier and the other end portion is slidably fitted into a hole provided in the punch carrier.

  The same can be said about the suspension pin. That is, one end portion of the vertical posture is fixed to the flat pad 12, the shaft portion is slidably fitted into the hole 11a provided in the punch holder 11, and the shaft end is prevented from falling out of the hole. It has been described that the expanded diameter portion 18b is formed. However, although not shown in the figure, one end portion in a vertical posture is fixed to the punch holder, and the shaft portion is slidably fitted into a fistula provided in the flat pad, and the end of the shaft portion from the fistula is inserted. It can also be set as the structure by which the enlarged diameter part which prevents a slip-off is formed.

  As can be understood from the above description, according to the through-hole punching mechanism according to the present invention, the through-hole can be formed by directly acquiring the speed at which the strip moves from the strip and synchronizing it. There is no need to supply new power for the punching operation, which makes it easier to save energy in production facilities. By incorporating the punching operation into the rolling forming line, the length of the production line and the large space occupied by the punching mechanism are suppressed, and it is possible to obtain continuous through holes that maintain a constant pitch even in the punching operation. .

It is a through-hole punching mechanism of the strip for roll forming which concerns on this invention, Comprising: The structural diagram showing the principal part. The perspective view of the whole mechanism showing the state currently supported by the two upper side rolls located in the pass line entrance side where this mechanism was introduced. The structure figure showing the location where this mechanism is installed, and the front view of the mechanism. Operation | movement explanatory drawing of the through-hole punching mechanism accompanying the up-and-down movement of an upper frame. Operation | movement explanatory drawing following FIG. FIG. 3 is an operation explanation following FIG. 1, and is a structural diagram when the flat pad sandwiches the belt material together with the die carrier in a state where the shaft body of the molding roll is rotated 120 degrees. FIG. 7 is an operation explanation subsequent to FIG. 6, and is a structural diagram at the time when the punch starts punching through-holes in the band material with the shaft body of the forming roll rotated 135 degrees. FIG. 8 is an operation explanation following FIG. 7, and is a structural diagram when the punch completely punches the strip material in a state where the shaft body of the forming roll is rotated 180 degrees. FIG. 9 is an operation explanation subsequent to FIG. 8, and is a structural diagram when the punch is completely extracted from the strip in a state where the shaft body of the forming roll is rotated by 225 degrees. FIG. 10 is a diagram illustrating the operation following FIG. 9, and is a structural diagram at the time when the flat pad starts to move away from the strip in a state where the shaft body of the molding roll is rotated by 240 degrees. Explanatory drawing of the punching process of the through-hole given to a strip | belt material when the diameter of an upper side roll is set to D and the pitch of a punch is set to (pi) D / 2. FIG. 5 is a diagram illustrating a forming process step that represents a deformation state of the band material at each time point when the band material is sequentially deformed and passes through a series of forming rolls. (A) is a schematic diagram of the rolling forming line provided with the through-hole punching apparatus employ | adopted conventionally, (b) is a schematic diagram of the rolling forming line in case this invention is applied. (A) is a connection explanatory drawing of adjacent deck plates, (b) is a left half view of a deck plate in which a through hole is formed.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Forming roll, 2 ... Pass line, 3, 3M, 3N ... Through-hole, 4 ... Band material, 5 ... Upper roll, 5a ... Shaft body, 6 ... Eccentric shaft, 7 ... Upper frame, 8 ... Lower frame, 9 ... punch carrier, 10 ... die carrier, 10a ... upper surface, 10b ... fist hole, 11 ... punch holder, 11a ... fist hole, 12 ... flat pad, 12a ... lower surface, 13 ... punch, 14 ... dice, 18 ... suspension pin, 18a ... shaft portion, 18b ... expanded diameter portion, 19 ... elastic body (coil spring), 20 ... connecting body, 21 ... actuator (single-acting air cylinder), 22 ... tuning gear train, 22A, 22B, 22C ... gear, Lb ... the distance between the rear through hole in the pair and the front through hole in the next punched pair (the distance between the through hole pair in the previous cycle and the through hole pair in the subsequent cycle), Lp ... interval.

Claims (6)

Forming with a series of rolls at the stage before the molded product is sent out from the pass line to the predetermined position of the strip that is passed through the rolling forming line with the forming rolls arranged in the series and sequentially rolled into a predetermined shape. In the through-hole punching mechanism of the roll forming band material that is designed to perform a punching process that cannot be performed,
An upper frame that moves up and down by an eccentric shaft that is positioned at substantially the same level as the upper roll of the pair of rolls positioned on the entry side of the pass line and that is fixed to the shaft body of the upper roll that rotates by the sliding contact force with the moving strip;
A lower frame that is located below the strip and is directly below the vertical movement space of the upper frame, and is in an immobile state without being affected by the movement of the strip;
An upper surface having a die that is open upward is positioned immediately below the band material flowing through the pass line, and a die carrier capable of reciprocating in the pass line direction on the lower frame;
A flat pad having a lower surface that is separated from and in contact with the upper surface of the band material flowing through the pass line and temporarily holds the band material in cooperation with the upper surface of the die carrier, and the flat pad located above the flat pad The elastic body suspended between the flat pad is compressed by the lowering of the upper frame and the flat pad is pushed down or separated from the flat pad by the elastic force released from the compression by the rising, thereby penetrating the flat pad up and down. A punch holder having a punch that enters the die and punches through holes in the strip, and a punch carrier capable of reciprocating in the pass line direction on the lower surface of the upper frame;
Provided at a position deviated from the side edge of the strip, one end in a vertical posture is fixed to the die carrier or punch carrier, and the other end is fitted so as to be slidable in a punch hole provided in the punch carrier or die carrier. A connected body that is inserted and always integrated with the punch carrier and the die carrier in the pass line direction;
Comprising
A roll forming band material characterized in that when the band material is sandwiched between the flat pad and the die carrier, the punch holder can also follow the movement of the die carrier using the propulsive force of the band material. Through hole punching mechanism.   2. The roll forming belt according to claim 1, wherein two punches arranged in a pass line direction are attached to the punch holder, and a circumferential length of the upper roll is twice a punch interval. Through hole punching mechanism.   3. A punch hole for punching a roll forming belt material according to claim 1, further comprising an actuator for returning the die carrier and the punch carrier integrally advanced by the connecting body to an initial position. mechanism.   The flat pad is suspended from the punch holder via a suspension pin, and the suspension pin is fixed to the punch holder or the flat pad at one end in a vertical posture, and the shaft portion is formed in a fistula provided in the flat pad or the punch holder. The swellable fitting is inserted, and an enlarged diameter portion that prevents the shaft from coming out from the hole is formed at the tip of the shaft portion. Punching mechanism for roll forming strips.   5. The upper frame that moves up and down is supported by an eccentric shaft that is fixed to a shaft body of two upper rolls positioned on the pass line entry side and arranged side by side. A through-hole punching mechanism for a roll forming belt member according to any one of the above.   6. The roll punching mechanism for a roll forming belt member according to claim 5, wherein the diameters of the two upper rolls are the same, and the rotation thereof is held at the same speed by a tuning gear train.

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