JP5931485B2 - Bending roll - Google Patents

Description

  The present invention relates to a bending roll that performs a bending process in which a plate material is reciprocated between one upper roll and a plurality of lower rolls to give a bending curvature in the pass direction.

  A bending roll that performs bending by passing a plate material back and forth between one upper roll and a plurality of lower rolls and imparting a bending curvature in the pass direction is usually large in bending force of the target plate material. In view of the above, the upper and lower rolls are provided so as not to be bent by the bending forming force. That is, a bending roll for bending a plate material having a large bending thickness such as a thick plate material or a high-strength plate material is provided with upper and lower rolls having a large roll diameter and high bending rigidity.

  In addition, there is a bending roll in which the back side of the upper and lower rolls is supported by a backup roll in order to prevent the bending due to the bending force (see, for example, Patent Document 1). In what is described in Patent Document 1, the back side of each upper and lower roll is supported by a single-stage backup roll divided in the axial direction.

JP 2009-255100 A

  In the conventional bending roll described above, when trying to bend a plate material whose bending forming force is increased by the plate thickness, strength, etc. to a small radius of curvature, the plate material to be formed is bent by the large roll diameter of the upper roll that curves to the outer peripheral side. There is a problem that the minimum radius of curvature that can be formed is limited.

  As described in Patent Document 1, if the upper roll is supported by the backup roll, the diameter of the upper roll can be reduced. However, in such a method of supporting the upper roll by the one-stage backup roll, the diameter is reduced. In order to reduce the diameter of the upper roll significantly, it is necessary to stack a number of backup rolls in a plurality of stages on the back side of the upper roll, as in a multi-stage rolling mill. For this reason, the passing diameter of the upper roll assembly including the backup roll is increased, and the minimum radius of curvature that can be formed is restricted.

  Accordingly, an object of the present invention is to prevent bending of an upper roll having a small roll diameter and to bend a plate material having a large bending forming force to a small curvature radius.

  In order to solve the above-described problems, the present invention provides a bending roll that performs a bending process in which a plate material is reciprocated between one upper roll and a plurality of lower rolls to give a bending curvature in the pass direction. A vertical plate member extending in the axial direction of the upper roll is disposed above the upper roll shaft, and the upper portion of the plate member is allowed to rotate from the upper side while allowing the upper roll to rotate. The structure which provided the roll receiving part and restrained the bending by the bending forming force of the said upper roll with the said plate member via the said upper roll receiving part was employ | adopted.

  That is, a vertical plate member extending in the axial direction of the upper roll is provided above the upper roll shaft, and the upper roll receives the body from above while allowing the upper roll to rotate on the lower end side of the plate member. By providing a receiving portion and restraining the bending due to the bending forming force of the upper roll with a plate member via the upper roll receiving portion, the bending of the upper roll having a small roll diameter is prevented, and a plate material having a large bending forming force is obtained. Bending can be performed with a small radius of curvature.

  The upper roll receiving portion may be a roller that is in rolling contact with a body portion of the upper roll.

  By providing tilt restraining means for restraining the tilt of the plate member that moves forward and backward in the thickness direction of the plate member from both sides of the vertical plate member, the plate member is tilted by the reaction force of the force that the upper roll tries to bend. Can be prevented.

  Protruding portions that protrude to both sides in the thickness direction of the plate member are provided on the lower end side of the plate member, and a hanging portion that suspends the molded product obtained by bending the plate material so as to be movable in the axial direction of the upper roll is provided. Thus, the molded product can be easily carried out along the suspended portion.

  The bending roll according to the present invention is provided with a vertical plate member extending in the axial direction of the upper roll above the upper roll shaft and allowing the upper roll to rotate on the lower end side of the plate member. The upper roll receiving part that receives the upper roll is provided and the bending due to the bending force of the upper roll is restrained by the plate member via the upper roll receiving part, so that the upper roll having a small roll diameter is prevented from being bent. A plate material having a large bending forming force can be bent to a small curvature radius.

Front view showing an embodiment of a bending roll The side view except the inclination restraining means of the plate member of FIG. FIG. 2 is an enlarged sectional view showing the vicinity of the upper roll. Arrow view along line IV-IV in Fig. 1 (A), (b) is sectional drawing which shows the procedure which performs bending molding with a small curvature radius with the up-and-down roll of FIG. Sectional drawing which shows the state which suspended the molded product bent-formed in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the bending roll includes one extremely small diameter upper roll 1 and two large diameter lower rolls 2, and a plate material is interposed between the upper roll 1 and the lower roll 2. This is a three-roll type that performs reciprocating passes and performs bending to give a bending curvature in the pass direction. Each of the lower rolls 2 is rotatably supported by bearings 4a erected on both sides of the lower frame 4 between the left and right frames 3a and 3b, and each of the lower rolls 2 is centered on the back side by a pair of short backup rolls 5 And is driven to rotate in forward and reverse directions. Each of the short backup rolls 5 is rotatably supported by bearing portions 4b provided upright on both sides of the central portion of the lower frame 4. The left frame 3a can be turned outward by a cylinder 6 as shown by an arrow in FIG. 1, and a bent product can be pulled out to the side.

  A vertical plate member 7 extending in the axial direction of the upper roll 1 is disposed above the shaft of the upper roll 1, and a plurality of two pairs of rollers as upper roll receiving portions are provided on the lower end side of the plate member 7. 8 are attached at intervals in the axial direction. Therefore, the bending due to the bending forming force of the upper roll 1 having a very small diameter and low bending rigidity is constrained by the plate member 7 having high rigidity in the vertical direction via each roller 8, so that the bending forming force depends on the plate thickness, strength, and the like. It is possible to suitably bend and form a plate material having a large thickness.

  The plate member 7 is provided with projecting portions 7a projecting downward at both left and right end portions, and the upper roll 1 is rotatably supported by the left and right projecting portions 7a. The plate member 7 is also provided with arm portions 7b having a circular cross section projecting left and right, and these left and right arm portions 7b are slidable in the vertical direction supported by the left and right frames 3a and 3b. 9 is supported. Each support box 9 is lifted and lowered by a cylinder 10 incorporated in the upper part of the left and right frames 3 a and 3 b, and the upper roll 1 is lifted and lowered together with the plate member 7 by this lifting and lowering.

  As shown in an enlarged view in FIG. 3, the pair of rollers 8 is rotatably supported by a roller case 11 attached to the lower end of the plate member 7 and is brought into rolling contact with the body portion of the upper roll 1 from above. It has become. Therefore, the upper roll 1 is allowed to rotate and the bending due to the bending force of the upper roll 1 can be restrained by the plate member 7 via each roller 8. Further, as will be described later, the bent product S is suspended from the front and rear shoulders of the plate member 7 projecting on both sides in the thickness direction so as to be movable in the axial direction of the upper roll 1. The rolling bearing 12 which becomes a part is attached.

  As shown in FIG. 4, tilt restraining means 13 for restraining the tilt of the vertical plate member 7 is provided inside the left and right frames 3a and 3b. This tilt restraining means 13 is provided with left and right portal frames 14a, 14b provided with tilt restraining members 16 which are advanced and retracted by cylinders 15 from both sides of the plate member 7 at two locations in the vertical direction. As indicated by the alternate long and short dash line in the figure, when the upper roll 1 and the plate member 7 are lowered to bend and form the plate material W, each tilt restraining member 16 moves forward so as to sandwich the plate member 7 from both sides. To be restrained. A roller 16 a that allows the sandwiched plate member 7 to move in the vertical direction is attached to the tip of each tilt restraining member 16. Further, a fixing pin 18 to be inserted by a cylinder 17 is attached to an upper portion of the plate member 7 raised to the standby position on the ceiling portion of the left portal frame 14a. The fixing pin 18 fixes the left side of the plate member 7 so that the left side of the plate member 7 is not inclined downward when the left frame 3a is overturned.

  5A and 5B show a procedure for performing bending with a small radius of curvature. In this bending, first, as shown in FIG. 5A, the front and rear ends of the plate W are reciprocated between the upper and lower rolls 1 and 2, and the front and rear ends are bent first. After that, the bending forming region is shifted to the center portion side of the plate material W, and finally the center portion of the plate material W is bent and formed as shown in FIG. Is done. Although illustration is omitted, when bending with a large curvature radius is performed, the plate material is reciprocated over the entire length, and bending is performed so that the entire length approaches the desired radius of curvature at the same time as in normal bending. To do.

  FIG. 6 shows a state in which the molded product S having a small curvature radius is suspended for unloading. The plate member 7 is lifted to the standby position, and the molded product S is hung at both ends of the bend formed by rolling bearings 12 at the front and rear shoulders of each roller case 11. As described above, each roller case 11 is attached to the lower end of the plate member 7 with an interval in the axial direction of the upper roll 1. In this state, after the left side of the plate member 7 is fixed by the fixing pin 18, the left frame 3 a is overturned, and the molded product S that is in rolling contact with each rolling bearing 12 is smoothly pulled out to the left side. Although illustration is omitted, a molded product having a large radius of curvature is also drawn out to the left side by being suspended from the rolling bearings 12 at both ends which are similarly bent.

  In the above-described embodiment, the upper roll receiving portion that allows the upper roll to rotate and receives the body portion from above is a roller that is in rolling contact with the upper roll body portion. It can also be formed of a concave seat surface that receives the body of the roll by sliding contact.

  In the above-described embodiment, the suspended portion that suspends the molded product so as to be movable in the axial direction is a rolling bearing. It can also be a bearing or the like.

  In the embodiment described above, the tilt restraining member of the plate member is attached to the gate frame provided separately. However, the tilt restraining member can be directly attached to the left and right frames without the gate frame. In this case, if the upper roll is cantilever-supported on the side opposite to the side from which the molded product is drawn, a molded product having a very large diameter can be drawn.

  In the above-described embodiment, a three-roll type bending roll having one upper roll and two lower rolls is used, but the bending roll according to the present invention is another lower roll immediately below the upper roll. It can also be made into the thing of the 4 roll form provided with.

DESCRIPTION OF SYMBOLS 1 Upper roll 2 Lower roll 3a, 3b Frame 4 Lower frame 4a, 4b Bearing part 5 Backup roll 6 Cylinder 7 Plate member 7a Projection part 7b Arm part 8 Roller 9 Support box 10 Cylinder 11 Roller case 12 Rolling bearing 13 Inclination restraint means 14a 14b Portal frame 15 Cylinder 16 Restraint member 16a Roller 17 Cylinder 18 Fixing pin

Claims (3)

In a bending roll that performs a bending process in which a plate material is reciprocated between one upper roll and a plurality of lower rolls to give a bending curvature in the pass direction,
A vertical plate member extending in the axial direction of the upper roll is disposed above the upper roll shaft, and the upper roll receives the body from above while allowing the upper roll to rotate at the lower end side of the plate member. A receiving portion is provided, and the bending due to the bending force of the upper roll is constrained by the plate member via the upper roll receiving portion, and advances and retreats in the thickness direction of the plate member from both sides of the vertical plate member. A bending roll provided with a tilt restraining means for restraining the tilt of the plate member . In a bending roll in which bending is performed by reciprocating a plate material between one upper roll and a plurality of lower rolls to give a bending curvature in the pass direction, the axis of the upper roll is above the axis of the upper roll. A vertical plate member extending in the direction is disposed, and an upper roll receiving portion is provided on the lower end side of the plate member to allow the upper roll to rotate and receive the body portion from above, and the bending force of the upper roll The plate member is bent by the plate member via the upper roll receiving portion, and a protruding portion that protrudes on both sides in the thickness direction of the plate member is provided on the lower end side of the plate member. A bending roll provided with a suspending section for suspending a molded product so as to be movable in the axial direction of the upper roll. The bending roll according to claim 1 or 2 , wherein the upper roll receiving portion is a roller that is in rolling contact with a body portion of the upper roll.

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