JP5989122B2 - Bending member manufacturing method and bending apparatus - Google Patents

Description

  The present invention relates to a bending member manufacturing method and a bending apparatus.

  Patent Documents 1 and 2 disclose a method of manufacturing a bending member using a linear mold and a bending mold. The manufacturing method of the bending member of patent documents 1 and 2 is that all bend the front end portion of the shape material, the straight shape that is arranged along the shape material before bending, the bending shape that is formed into a curved shape. A pressing member that is fixed to a mold and a pair of rolls that sandwich the linear mold and the bending mold are used.

  Patent Document 1 discloses a method of manufacturing a bending member of a method of moving a linear mold and a bending mold with respect to a pair of rolls (hereinafter referred to as “mold moving type”). Discloses a method of manufacturing a bending member of a system in which a pair of rolls are moved relative to a linear mold and a bending mold (hereinafter referred to as “roll moving type”).

JP 2002-66642 A International Publication No. 2008/102430 Pamphlet

  In the bending member manufacturing methods of Patent Documents 1 and 2, since only one shape member can be bent at a time, the same number of bending processes as the number of bending members to be manufactured are required.

  From such a viewpoint, it is an object of the present invention to provide a bending member manufacturing method and a bending apparatus capable of reducing the number of bending operations compared to the number of bending members to be manufactured.

  The bending member manufacturing method according to the present invention includes a shape preparation step of preparing a shape formed by arranging a plurality of long product portions, which are elements of the bending member, in the short direction thereof, and the shape material in a linear shape. A shape arranging step of fixing the front end portion of the shape member to a bending die facing the linear die while being bent, and a bending preparation step of sandwiching the linear die and the front portion of the bending die by a pair of rolls, A bending step of moving the pair of rolls toward the rear of the linear mold, or moving the linear mold and the bending mold forward of the pair of rolls; and the pair of rolls in front of the linear mold A plurality of long product parts that are curved when the return process is performed, and the linear mold and the bending mold are moved to the rear of the pair of rolls. It is characterized by separating.

  According to the bending member manufacturing method according to the present invention, a plurality of long product parts (parts that are elements of the bending member) can be bent in a single bending step. It is possible to reduce the number of times of bending than the number. In addition, since a plurality of long product parts are separated in the process of returning a pair of rolls or box molds (straight line mold and bending mold) to the initial position, the next bending process (bending process performed on a new profile) Can be quickly transferred to.

  As the shape member, a strip-shaped connecting portion is provided between the long product portions, and grooves are formed along both side edges of the connecting portions, or the long product portions are A belt-like connecting portion is provided between the two and the connecting portion is formed thinner than the long product portion. When using such a profile, the return step is performed in a state where a blade is in contact with the connecting portion between the pair of rolls, and the connecting portion is cut off when the returning step is performed. Thus, it is preferable to separate the plurality of curved long product portions. If it does in this way, a connection part can be removed easily.

  A bending apparatus according to the present invention includes a linear mold arranged along a shape before bending, a bending mold formed into a curved shape, and a presser for fixing a front portion of the shape to the bending mold. A member, a pair of rolls sandwiching the linear mold and the bending mold, and a cutting tool for cutting the profile in a longitudinal direction in a state of being disposed between the linear mold and the bending mold. It is characterized by.

  According to the bending apparatus according to the present invention, the pair of rolls are moved toward the rear part of the linear mold, or the profile is bent by moving the linear mold and the bending mold forward of the pair of rolls. be able to. Moreover, since the cutting tool is provided, the shape member arranged between the linear mold and the bending mold can be divided. That is, according to the bending apparatus according to the present invention, since a plurality of bending members can be manufactured from one shape member, the number of bending processes can be made smaller than the number of bending members to be manufactured.

  The linear mold and the bending mold are separated from each other before and after the pair of rolls, but are abutted between the pair of rolls and hold the profile (when the linear mold and the bending mold are abutted) Therefore, the cutting tool may be disposed between the pair of rolls. If the cutting tool is brought into contact with the shape that is held between the straight type and the bending type (that is, the shape is less likely to be misaligned), misalignment is less likely to occur at the cutting position. Can be increased.

  In the case of further comprising a support body for supporting the pair of rolls and a driving means for moving the support body forward or backward along the linear shape, the blade may be supported by the support body. That is, in a roll moving type bending apparatus, the cutting tool may be supported by a roll support. In this way, the cutting tool can be moved forward or backward in conjunction with the pair of rolls without providing a blade-specific drive means for moving the blade forward or backward, thereby simplifying and reducing the cost of the bending apparatus. be able to.

  A slit extending in the longitudinal direction may be provided in the linear mold, and the cutting tool may be brought into contact with the shape member through the slit. In this case, it is preferable that the cutting tool can move relative to the longitudinal direction of the linear type and can advance and retreat in the inner and outer directions of the linear type. If it does in this way, it will become possible to adjust easily the contact condition etc. of the cutting tool to a shape material.

  A concave groove extending in the longitudinal direction may be provided in the bending die, and a tip portion of the cutting tool may be opposed to an opening end of the concave groove. When the concave groove is provided in the bending die, the cutting portion of the shape member (the portion facing the concave groove) is not supported by the bending die, so that the shape member can be cut more reliably.

  When using the cutting tool extending in the longitudinal direction of the linear mold, the tip of the cutting tool is inserted between the linear mold and the bending mold from the end face side of the linear mold, and It is good to position the front-end | tip of the said blade tool between a pair of rolls. If such a cutting tool is used, a straight slit is not necessary, and the straight configuration is simplified.

  According to the present invention, the number of bending processes can be made smaller than the number of bending members to be manufactured.

  In addition, the material of the billet that is the base material of the profile cannot be completely the same for all billets, and even in one billet, the material is slightly different depending on the first extruded portion and the middle and last extruded portion. In addition, due to the fact that the thermal history, etc. given at the time of manufacturing the shape varies from production rod to production rod, the material of the profile varies slightly from production rod to production rod. However, according to the present invention, there is a possibility that the shape (curvature) varies for each bending member. Therefore, the amount of spring back generated in each long product portion is substantially equal, and consequently, the curvatures of a plurality of bending members obtained from one profile are substantially equal. That is, according to the present invention, it is possible to easily obtain a plurality of bending members having the same curvature from one shape member.

  Moreover, when the curvature of the bending member (curved long product part) obtained through the bending step and the returning step is different from the target curvature, a load is applied to the bending member to correct the curvature of the bending member. In some cases, if the curvature of a plurality of bending members is complete at the time of completion of the return process, it becomes possible to correct a plurality of bending members at the same time in the subsequent correction process, so the curvature of the bending members It is possible to efficiently perform the process of correcting the above.

(A)-(e) is typical sectional drawing which shows the outline | summary of the manufacturing method and bending apparatus of the bending member which concern on embodiment of this invention. It is a perspective view of a profile, a linear type, a bending type, a pressing member, and a roll. (A) is sectional drawing which shows the state which positioned the blade tool in the retracted position, (b) is sectional drawing which shows the state which positioned the blade tool in the cutting position. It is a figure which shows the bending apparatus which concerns on embodiment of this invention, Comprising: (a) is a top view, (b) is a side view. It is a partially broken perspective view which shows the bending apparatus which concerns on embodiment of this invention. It is an enlarged front view of the bending apparatus which concerns on embodiment of this invention. It is an enlarged plan view of the bending apparatus which concerns on embodiment of this invention. (A)-(c) is typical sectional drawing which shows the modification of the manufacturing method of the bending member which concerns on embodiment of this invention. It is typical sectional drawing which shows the other modification of the manufacturing method of the bending member which concerns on embodiment of this invention. (A) is sectional drawing which shows the groove | channel formed in the both sides of the connection part of a profile, (b) is sectional drawing which shows the case where the connection part of a profile is made thin.

  The bending member manufacturing method according to the embodiment of the present invention is carried out using a bending apparatus B as shown in FIG. A shape arranging step of fixing the front end portion of the shape S to the bending die 2 facing the straight die 1 while keeping the shape S along (see FIG. 1A), and a pair of rolls 4 and 5 A bending preparation step for sandwiching the front portions of the linear die 1 and the bending die 2 (see FIG. 1A), a bending step for moving the pair of rolls 4 and 5 toward the rear portion of the linear die 1 (FIG. 1). (B) and (c)), after the cutting tool 6 is protruded toward a predetermined position, the pair of rolls 4 and 5 are attached to the front portion of the linear mold 1 while the cutting tool 6 is in contact with the profile S. And a returning step (see (d) and (e) of FIG. 1). When the returning process is performed, the profile S is separated into two, and two independent bending members are obtained.

  A bending apparatus B according to an embodiment of the present invention includes a linear mold 1 arranged along a shape S before bending, a bending mold 2 formed into a curved shape, and a front end portion of the shape S. A pressing member 3 fixed to the bending die 2, a pair of rolls 4, 5 sandwiching the linear die 1 and the bending die 2, and the profile S arranged between the linear die 1 and the bending die 2 in the longitudinal direction And a cutting tool 6 for cutting. The linear mold 1 and the bending mold 2 are abutted when passing between the pair of rolls 4 and 5.

  The profile S is an extruded shape made of aluminum alloy that is the element of the two bent members, and as shown in FIG. 2, the profile S is juxtaposed in the short direction of the extruded profile (direction perpendicular to the extrusion direction). A pair of long product parts S1, S1 and a strip-shaped connecting part S2 provided between the long product parts S1, S1 are provided. That is, the profile S has a cross-sectional shape in which two long product portions S1 are arranged in parallel in the short direction.

  The long product portion S1 has the same cross-sectional shape as the bent member to be manufactured. The long product portions S1 and S1 are integrated with each other via the connecting portion S2, but are separated after bending (after the returning step) and become two independent bending members.

  Connection part S2 is a site | part cut in a return process. Grooves S3 and S3 are formed along the longitudinal direction of the profile S on both side edges of the connecting portion S2.

  The grooves S3 and S3 are formed when the profile S is extruded. As shown in FIG. 10A, in this embodiment, grooves S3 and S3 having a V-shaped cross section are formed on both the front and back surfaces of the profile S, but the groove S3 is formed only on one surface. , S3 may be formed. Further, like the profile S ′ shown in FIG. 10B, the connecting portion S2 may be formed thinner than the long product portions S1 and S1. That is, the connecting part S2 may be formed thinner than the long product part S1 adjacent thereto, and a step may be formed at the boundary between the long product part S1 and the connecting part S2.

  Although there is no restriction | limiting in the use of a bending member, The bending member of this embodiment is used as a guide rail of the sunroof for motor vehicles. One long product portion S1 serves as a guide rail on the right side of the vehicle, and the other long product portion S1 serves as a guide rail on the left side of the vehicle.

  The linear mold 1 is a linear mold and is disposed outside the bend. The outer surface of the linear mold 1 is formed into a flat surface without local unevenness, and the inner surface of the linear mold 1 is formed into a cross-sectional shape corresponding to the concave and convex portions on one side surface of the profile S. ing.

  The linear mold 1 is formed with a linear slit 1a. The slit 1a is a belt-like space extending from the outer surface to the inner surface of the linear mold 1 and is at a height position corresponding to the connecting portion S2 that is the separation position of the profile S (in this embodiment, the height of the linear mold 1). In the central portion of the direction, the linear mold 1 extends in the longitudinal direction.

  The linear mold 1 of the present embodiment includes a lower linear mold 11, an upper linear mold 12 disposed on the upper side of the lower linear mold 11, and a joining member 13 that connects the ends of the lower linear mold 11 and the upper linear mold 12. It has.

  The lower straight mold 11 corresponds to the shape of the lower half of the profile S, and the upper straight mold 12 corresponds to the shape of the upper half of the profile S. The lower straight mold 11 and the upper straight mold 12 are arranged vertically with a gap serving as the slit 1a. Flat plate portions 11 a and 12 a are formed at the ends of the lower straight mold 11 and the upper straight mold 12.

  The joining member 13 is arrange | positioned at the both ends of the linear mold | type 1 (only one end side is shown in FIG. 2). The joining member 13 of the present embodiment is made of a rectangular plate material having a height dimension equal to the height dimension of the linear mold 1, and is overlapped on the inner side surfaces of the flat plate portions 11a and 12a. A spacer 13 a is projected from the joining surface of the joining member 13 (the surface that contacts the flat plate portions 11 a and 12). The joining member 13 is bolted to the flat plate portions 11a and 12a, but may be fixed to the flat plate portions 11a and 12a by a clamp or the like, or may be joined to the flat plate portions 11a and 12a by welding or the like. Also good.

  The spacer 13a holds the width of the slit 1a (the gap width between the lower straight mold 11 and the upper straight mold 12). The spacer 13 a may be integrally formed with the joining member 13, or may be separate from the joining member 13.

  The bending die 2 is an arc-shaped die that is curved in accordance with the finished shape (design shape) of the bending member, and is disposed on the opposite side (bending inner side) of the linear die 1 with the profile S interposed therebetween. The curvature of the bending die 2 is larger than the curvature of the finished shape in consideration of the spring back generated in the profile S. The outer surface of the bending die 2 is formed into a gentle curved surface having no local unevenness. The inner side surface of the bending die 2 is formed in a cross-sectional shape corresponding to the concave portion and the convex portion on the other side surface of the profile S, and faces the inner side surface of the linear die 1. When the linear mold 1 and the bending mold 2 are brought into contact with each other, a gap corresponding to the cross-sectional shape of the profile S (a gap in which the profile S just fits) is formed by the inner surface of the linear mold 1 and the inner surface of the bending mold 2. Is done.

  A concave groove 2 a is formed in the bending die 2. The concave groove 2a extends in the longitudinal direction of the bending die 2 at a height position corresponding to the separation position of the profile S (in this embodiment, the central portion in the height direction of the bending die 2). That is, the concave groove 2a is formed at a position facing the slit 1a (see FIG. 3).

  The pressing member 3 is a block-shaped member that is fixed to the front end portion of the bending die 2. The outer surface of the presser member 3 is formed into a flat surface without unevenness, and the inner surface of the presser member 3 is formed into the same cross-sectional shape as the inner surface of the linear mold 1. A gap formed between the inner side surface of the bending die 2 and the inner side surface of the pressing member 3 is a gap corresponding to the cross-sectional shape of the shape member S (a gap in which the shape member S just fits).

  The pressing member 3 according to the present embodiment includes a lower pressing member 31 that fixes the lower half of the profile S to the bending die 2 and an upper pressing member 32 that fixes the upper half of the profile S to the bending die 2. The lower presser member 31 and the upper presser member 32 are arranged vertically with a gap. The gap width between the lower presser member 31 and the upper presser member 32 is equal to the width of the slit 1a (the gap width between the lower straight mold 11 and the upper straight mold 12).

  As shown in FIG. 1, the rolls 4 and 5 are arranged in parallel in the left-right direction (direction orthogonal to the longitudinal direction of the linear mold 1, see FIG. 4). The rolls 4 and 5 are movable along the longitudinal direction of the linear mold 1 while keeping the distance between them constant. As shown in FIG. 2, one roll 4 has a cylindrical surface in line contact with the outer surface of the linear mold 1, and the other roll 5 has a cylindrical surface in line contact with the outer surface of the bending mold 2. The pair of rolls 4 and 5 can rotate around the central shaft portions 4a and 5a. The central shaft portions 4a and 5a are parallel to the normal line of the plane (the upper surface of the table 7 shown in FIG. 3) on which the linear mold 1 and the bending mold 2 are placed.

  In the following description, the roll 4 in contact with the outer surface of the linear mold 1 may be referred to as “fixed roll 4”, and the roll 5 in contact with the outer surface of the bending mold 2 may be referred to as “movable roll 5”. .

  The blade 6 is disposed between the pair of rolls 4 and 5 (see FIG. 1). The cutting tool 6 of the present embodiment is made of a steel material having an arc shape in a plan view and having a thickness that can be inserted into the slit 1a (see FIG. 2), and moves along the longitudinal direction of the linear mold 1 while being inserted into the slit 1a. Is possible. As shown in FIG. 3A, the cutting tool 6 is inserted into the slit 1 a of the linear mold 1, and the distal end portion 6 a of the cutting tool 6 faces the concave groove 2 a of the bending mold 2.

  The cutting tool 6 of the present embodiment has a retracted position that does not protrude from the inner surface of the linear mold 1 (see FIG. 3A) and a cutting position that protrudes from the inner surface of the linear mold 1 (see FIG. 3B). In order to be able to select two positions, the linear mold 1 can be advanced and retracted in the inner and outer directions (horizontal direction perpendicular to the longitudinal direction of the linear mold 1). As shown in FIG. 3B, when the cutting tool 6 is advanced toward the bending mold 2, the tip end portion 6 a of the cutting tool 6 is in a shape accommodating space (when the linear mold 1 and the bending mold 2 are abutted with each other). 2) across a gap (V) formed between the inner surface of the linear mold 1 and the inner surface of the bending mold 2, and reaches the open end of the groove 2a (see FIG. 2). In FIG. 3B, the tip 6a of the blade 6 is located at the open end of the groove 2a, but the tip 6a may be inserted into the groove 2a.

With reference to FIGS. 4-7, the structure of the bending apparatus B is demonstrated in detail.
In addition to the linear mold 1, the bending mold 2, the holding member 3, the pair of rolls 4, 5 and the cutting tool 6, the bending apparatus B includes the linear mold 1 and the bending tool as shown in FIGS. A table 7 on which the mold 2 is placed, a support 8 that supports the rolls 4, 5 and the cutting tool 6, and a geared motor (drive means) 9 that moves the support 8 forward or backward along the linear mold 1. ing.

  The table 7 includes a pedestal 71 (see FIG. 4B), a base 72, guide rails 73 and 73, support legs 74 and 74, a top plate 75, a rack rail (tooth rail) 76, and a restraint. And a member 77.

  As shown in FIG. 5, the gantry 71 includes a skeleton structure formed by combining steel materials. A space capable of accommodating the geared motor 9 is secured in the gantry 71. Note that the configuration of the gantry 71 is not limited to the illustrated one, and may be changed as appropriate.

  The base 72 is installed on the pedestal 71. The base 72 of the present embodiment is composed of a pair of plate members arranged in parallel in the left-right direction. An opening 72a formed between the plate members is a movement path of the geared motor 9, and extends in the front-rear direction.

  The guide rails 73 are installed on the upper surface of the base 72. The guide rails 73 of the present embodiment are disposed on both sides of the opening 72a of the base 72, and each extend in the front-rear direction.

  As shown in FIG. 4B, the support legs 74 and 74 are erected at both ends in the longitudinal direction of the base 72 and support the top plate 75. A stay 74 a is installed on the upper surface of the rear support leg 74.

  The top plate 75 is disposed above the base 72. As shown to (a) of FIG. 4, the top plate 75 of this embodiment consists of a board | plate material of a planar view rectangle. On the top surface of the top plate 75, the linear mold 1 and the bending mold 2 are placed.

  As shown in FIG. 4B, the rack rail 76 is installed below the top plate 75 and extends in the longitudinal direction (front-rear direction) of the linear mold 1. The rack rail 76 is fixed to the lower surface of the left side edge of the top plate 75 (see FIG. 6).

  The constraining member 77 constrains the linear mold 1 and is disposed along one side edge of the top plate 75 as shown in FIG. The restraining member 77 of the present embodiment is made of a strip-shaped plate material, and extends from the longitudinal end of the top plate 75 toward the linear mold 1. One end side of the restraining member 77 is fixed to the stay 74 a, and the other end side of the restraining member 77 is fixed to the front end portion of the linear mold 1.

  The support 8 supports the fixed roll 4, the movable roll 5, and the cutting tool 6. As shown in FIG. 5, a rectangular frame-shaped housing (first side plate 81, second side plate 82, lower plate 83 and An upper plate 84), an overhanging plate 85, an engaging groove member 86, a roll holder 87, a clamping means 88, and a cutting tool moving means 89. The support 8 can slide back and forth along the guide rails 73 and 73.

  As shown in FIG. 6, the first side plate 81 and the second side plate 82 are disposed on the left and right sides of the top plate 75 and face each other with the top plate 75 interposed therebetween. The first side plate 81 is disposed on the left side (the linear mold 1 side) of the top plate 75 in FIG. 6, and the second side plate 82 is disposed on the right side (the bending mold 2 side) of the top plate 75.

  The lower plate 83 is disposed below the top plate 75 and connects the lower ends of the first side plate 81 and the second side plate 82 to each other. Sliding members 83 a and 83 a are fixed to the lower surface of the lower plate 83. The sliding member 83a is slidably engaged with the guide rail 73.

  The upper plate 84 is disposed above the top plate 75 and connects the upper ends of the first side plate 81 and the second side plate 82 to each other. Further, the upper plate 84 rotatably supports the upper end portion of the central shaft portion 4 a of the fixed roll 4. The upper plate 84 is formed with a guide opening 84a having a rectangular shape in plan view (see FIG. 7).

  The projecting plate 85 is fixed to the first side plate 81 and projects from the inner surface of the first side plate 81 toward the top plate 75. The overhanging plate 85 rotatably supports the lower end portion of the central shaft portion 4 a of the fixed roll 4. An engaging groove 85 a is formed on the distal end surface of the overhanging plate 85. The engaging groove 85a is slidably engaged with the side edge of the top plate 75.

  The engagement groove member 86 is fixed to the second side plate 82. The engagement groove member 86 is formed with an engagement groove 86a. The engaging groove 86a is slidably engaged with the side edge of the top plate 75.

  The roll holder 87 holds the movable roll 5 and can move in the left-right direction. The roll holder 87 according to the present embodiment is a lower support portion 87a that rotatably supports the lower end portion of the central shaft portion 5a of the movable roll 5, and an upper portion that rotatably supports the upper end portion of the central shaft portion 5a of the movable roll 5. A support portion 87b, a wall portion 87c connecting the lower support portion 87a and the upper support portion 87b, a first connecting rod 87d interposed between the lower support portion 87a and the upper support portion 87b, and the upper support portion 87b. And an engaging portion 87e provided at the upper end portion. The upper support portion 87 b is inserted into the guide opening 84 a of the upper plate 84. The engaging portion 87e projects from the front and back of the upper support portion 87b and is placed on the opening edge of the guide opening 84a (see FIGS. 5 and 7). That is, the roll holder 87 is supported by the upper plate 84 so as to be movable in the left-right direction.

  The clamp means 88 includes a base portion 88a, an engaging portion 88b disposed above the base portion 88a, a connecting bolt 88c connecting the base portion 88a and the engaging portion 88b, and a second connecting rod 88d supported by the base portion 88a. , A toggle link mechanism 88e that connects the first connecting rod 87d and the second connecting rod 88d, a bracket 88f (see FIG. 7) attached to the rear surface of the base 88a, and a clamping cylinder 88g supported by the bracket 88f (see FIG. 7) and an adjustment bolt 88h protruding from the side surface of the base 88a. In FIG. 5, the bracket 88f and the clamping cylinder 88g are not shown.

  The base 88a has a recess that opens laterally. The engaging portion 88b is placed on the opening edge portion of the guide opening 84a, and suspends the base portion 88a via a connecting bolt 88c.

  The second connecting rod 88d is disposed so as to straddle the concave portion of the base portion 88a. The bracket 88f shown in FIG. 7 extends forward from the front surface of the base 88a shown in FIG. A clamping cylinder 88g shown in FIG. 7 is an air cylinder. The clamping cylinder 88g is pin-joined to the rear end portion of the bracket 88f, and is rotatable about a vertical axis. The rod of the clamping cylinder 88g is connected to the central node (joint part of the two links) of the toggle link mechanism 88e.

  When the rod of the clamping cylinder 88g is advanced, the crossing angle of the two links of the toggle link mechanism 88e increases, and the roll holder 87 moves to the fixed roll 4 side. That is, when the rod of the clamping cylinder 88g is advanced, the outer peripheral surface of the movable roll 5 comes into contact with the outer surface of the bending die 2. On the other hand, when the rod of the clamping cylinder 88g is retracted, the crossing angle of the two links of the toggle link mechanism 88e becomes small, and the roll holder 87 moves to the second side plate 82 side. That is, when the rod of the clamping cylinder 88g is retracted, the outer peripheral surface of the movable roll 5 is separated from the outer surface of the bending die 2.

  The adjustment bolt 88h adjusts the separation distance between the second side wall 82 and the base portion 88a, and is screwed into the screw hole of the second side wall 82.

  The cutting tool moving means 89 is disposed before and after the fixed roll 4. The front cutting tool moving means 89 supports the front end of the cutting tool 6, and the rear cutting tool moving means 89 supports the rear end of the cutting tool 6.

  As shown in FIG. 6, the cutting tool moving means 89 of the present embodiment is fixed to the cutting tool cylinder 89a fixed to the first side plate 81, the pedestal 89b fixed to the rod of the cutting tool cylinder 89a, and the pedestal 89b. And a pair of fixing portions 89c and 89c. The cutting tool cylinder 89a is an air cylinder and includes a rod with a guide. The rod of the cutter cylinder 89a advances and retreats in the horizontal direction (left-right direction) intersecting the longitudinal direction of the linear mold 1. The fixing portions 89c and 89c are opposed to each other with an interval where the end portion of the blade 6 can be inserted. The blade 6 and the fixing portions 89c and 89c are connected to each other via a bolt (not shown) penetrating them.

  When the rods of the blade tool cylinders 89a and 89a are advanced, the blade tool 6 moves to the movable roll 5 side, and when the rods of the blade tool cylinders 89a and 89a are retracted, the blade tool 6 moves to the fixed roll 4 side.

  The geared motor 9 is fixed to the lower plate 83 of the support 8. The gear (pinion) of the geared motor 9 meshes with the rack rail 76, and when the geared motor 9 is driven, the support 8 moves forward or backward.

Next, each process of the manufacturing method of the bending member which concerns on this embodiment is demonstrated in detail.
The manufacturing method of the bending member which concerns on this embodiment is implemented using the bending apparatus B, as shown to (a)-(e) of FIG. An arrangement process, a bending preparation process, a bending process, and a returning process are provided.

  The profile preparation step is a step of preparing the profile S (see FIG. 2). Although illustration is omitted, the holes and notches to be formed in the bending member may be formed in advance in the shape material S before bending.

  The profile arrangement step is a step of fixing the front end portion of the profile S to the inner surface of the bending die 2 while keeping the profile S along the inner surface of the linear mold 1. The specific procedure in the profile arrangement process is as follows. First, an operation for retracting the rod of the clamping cylinder 88g (see FIG. 7) is performed to separate the movable roll 5 from the bending mold 2, and then the linear mold 1 and the bending mold 2 are manually separated. When the linear mold 1 and the bending mold 2 are separated from each other, the profile S can be easily put in and out. The manual separation operation is an operation for facilitating the operation of inserting and removing the profile S and the operation of inserting the front end portion of the profile S between the bending die 2 and the presser member 3. If there is an appropriate gap between the linear mold 1 and the bending mold 2, it may be omitted. Next, while the shape material S is disposed between the linear die 1 and the bending die 2 by manual work, the shape material S is advanced toward the presser member 3, and between the bending die 2 and the presser member 3. The front end portion of the shape member S is inserted into the gap formed in. When the front end portion of the profile S is inserted into the gap, the profile S is fixed to the bending die 2. When the shape S is fixed to the bending die 2, the shape 3 is held on the inner surface of the linear die 1 while the linear die 1 and the bending die 2 are abutted between the rolls 4 and 5.

  The bending preparation step is a step of sandwiching the front portions of the linear die 1 and the bending die 2 with the rolls 4 and 5. In the bending preparation step, an operation for advancing the rod of the clamping cylinder 88g (see FIG. 7) may be performed. When the rod of the clamping cylinder 88g (see FIG. 7) is advanced, the movable roll 5 moves toward the bending die 2 in conjunction with the operation of the toggle link mechanism 88e, and the movable roll 5 moves on the outer surface of the bending die 2. The pressed state (the state where the rolls 4 and 5 hold the linear die 1 and the bending die 2) is obtained. The bending preparation step is performed in a state in which the rod of the blade tool cylinder 89a is retracted (a state in which the blade 6 is positioned at the retracted position).

  The bending process is a process of moving the rolls 4 and 5 toward the rear part of the linear mold 1 without bringing the cutting tool 6 into contact with the profile S as shown in FIGS. When executing the bending process, the geared motor 9 may be operated. That is, when the operator operates a switch (not shown) of the bending apparatus B, a control program for sequence control is activated, and control for causing the geared motor 9 to rotate forward is executed. When the geared motor 9 is rotated forward, the support 8 on which the rolls 4 and 5 are mounted moves toward the rear portion of the linear mold 1.

  The linear mold 1 and the bending mold 2 are separated from each other behind the rolls 4 and 5, but are abutted between the rolls 4 and 5. In front of the rolls 4 and 5, the linear mold 1 and the bending mold 2 are separated from each other again. However, since the front end portion of the profile S is sandwiched between the bending mold 2 and the pressing member 3, The profile S located in front of 5 is curved along the bending die 2. As the bending of the profile S progresses, a force to leave the bending die 2 acts on the unprocessed portion of the profile S (the straight portion located behind the rolls 4 and 5). It is received by the linear mold 1. In the bending process, since the cutting tool 6 is positioned at the retracted position, the profile S is not cut.

  When it is detected by a sensor (not shown) that the rolls 4 and 5 have reached a position beyond the rear end of the profile S, control for stopping the geared motor 9 is executed according to the control program, and further, the cutter cylinder 89a. , 89a is controlled to supply air. When air is supplied to the blade cylinders 89a and 89a, the rods of the blade cylinders 89a and 89a advance, and the blade 6 moves (protrudes) toward the bending die 2. When it is detected by a sensor (not shown) that the rod advance amount of the blade cylinders 89a and 89a has reached a specified value, control for stopping the rod advance is executed according to the control program, and the process proceeds to the return step.

  The returning step is a step of moving the rolls 4 and 5 toward the front portion of the linear mold 1 in a state where the cutting tool 6 is in contact with the profile S (see (d) and (e) of FIG. 1). In the returning step, control for reversely rotating the geared motor 9 based on the control program is executed. When the geared motor 9 is rotated in the reverse direction, the support 8 on which the rolls 4 and 5 are mounted moves toward the front portion (initial position) of the linear mold 1. When it is detected by a sensor (not shown) that the rolls 4 and 5 have reached the initial position, control for stopping the geared motor 9 is executed according to the control program.

  The returning process is performed in a state where the cutting tool 6 protrudes from the inner surface of the linear mold 1 (a state where the cutting tool housing space V is crossed). It will contact | abut to connection part S2 from the rear end side, and will press connection part S2 to the bending die 2 side. In this embodiment, since the concave groove 2a is located on the side of the connecting portion S2, and the connecting portion S2 is not in contact with the inner surface of the bending die 2, when the blade 6 comes into contact with the connecting portion S2, Shear force concentrates on the grooves S3 and S3 on both sides, and the profile S is cut along the grooves S3 and S3.

  Thus, when the support body 8 is returned to the initial position, the connecting portion S2 is cut off, so that the profile S is separated into two, and two independent bending members are obtained.

  In addition, the billet used as the base material of the profile S cannot be completely the same for all billets, and even in one billet, the material is slightly different depending on the first extruded portion and the middle and last extruded portions. Because the material of the profile varies slightly from production rod to production rod due to differences, the heat history given during extrusion molding, etc., varies slightly from production rod to production rod, the two bent members are separated from the two profiles. However, according to the manufacturing method according to the present embodiment, one shape S can be obtained, although the amount of springback generated in each shape is not equal and the shape (curvature) may vary for each bending member. Since the two long product portions S1 and S1 are included, the amount of spring back generated in each long product portion S1 is substantially equal, and consequently, the bending of two bending members obtained from one profile S is obtained. But it becomes substantially equal.

  When the bending member is taken out from the linear mold 1 and the bending mold 2, the operation of retracting the rod of the clamping cylinder 88g (see FIG. 7) is performed to move the movable roll 5 away from the bending mold 2, and the linear mold is performed manually. After separating 1 and the bending die 2, the bending members (curved long product portions S1, S1) may be taken out. The manual separation of the linear mold 1 and the bending mold 2 is an operation performed to facilitate the work of taking out the bending member, and may be omitted as appropriate.

  When the curvature of the bending member (curved long product portion S1, S1) obtained through the bending step and the returning step is different from the target curvature, an operation for correcting the curvature of the bending member is performed. In order to correct the curvature, for example, a concentrated load may be applied to an appropriate position of the bending member. In addition, since the curvature (curvature of long product part S1, S1 at the time of finishing a return process) of two bending members shape | molded from one profile S becomes substantially equal, the position where a concentrated load is applied, The magnitude of the concentrated load and the like are also substantially equal, and therefore it is possible to correct two bending members simultaneously.

  According to the bending apparatus B and the bending member manufacturing method using the bending apparatus B according to the present embodiment described above, the two long product portions S1 and S1 can be bent together in a single bending step. Thus, the number of bending processes can be reduced as compared with the number of bending members to be manufactured. In addition, since the plurality of long product parts S1 and S1 are separated in the process of returning the pair of rolls 4 and 5 to the initial position, the next bending process (bending process performed on a new profile) is quickly shifted to. it can.

  Furthermore, according to the bending apparatus B and the bending member manufacturing method according to the present embodiment, since a plurality of long product parts S1, S1 are included in one profile S, the long product parts S1, S1 are included. The springback amounts generated in the two are substantially equal, and as a result, the curvatures of the two bent members (curved long product portions S1, S1) are substantially equal. That is, according to the bending apparatus B and the bending member manufacturing method according to the present embodiment, it is possible to easily obtain two bending members having the same curvature from one shape member S. Further, when correcting the curvature of the bending member, the curvatures of the two bending members can be corrected at the same time, so that this can be performed efficiently.

  Further, in the present embodiment, since the shape S is formed with the grooves S3 and S3, the connecting portion S2 can be easily and cleanly removed.

  In this embodiment, since the cutting tool 6 is disposed between the pair of rolls 4 and 5 between which the profile S is sandwiched between the linear mold 1 and the bending mold 2, the cutting position is difficult to shift, and as a result, the processing accuracy is increased. Is expensive.

  In the present embodiment, since the blade 6 is mounted on the support 8 that supports the rolls 4 and 5, it is not necessary to provide a drive means dedicated to the blade for moving the blade 6 forward or backward along the linear mold 1. That is, according to the bending apparatus B, the cutting tool 6 moves forward or backward in conjunction with the forward or backward movement of the rolls 4 and 5, so that the driving means dedicated to the cutting tool can be omitted. Simplification and cost reduction can be achieved.

  Further, since the cutting tool 6 can advance and retreat in and out of the linear mold 1, it is possible to easily adjust the degree of contact of the cutting tool 6 with the profile S and the like.

  Furthermore, according to this embodiment, since the cutting part of the profile S (the part facing the concave groove 2a) is not supported by the bending die 2, the profile S can be more reliably cut. .

  In the present embodiment, the roll moving type bending apparatus B that moves the rolls 4 and 5 with respect to the linear mold 1 and the bending mold 2 and the manufacturing method of the bending member are exemplified, but FIGS. 8A to 8C. As shown, the present invention can be applied to a mold moving type in which the linear mold 1 and the bending mold 2 are moved with respect to the rolls 4 and 5.

  The bending apparatus B1 shown in FIGS. 8 (a) to 8 (c) also includes a support (similar to the support 8 shown in FIG. 5 and the like) that supports the rolls 4 and 5. Is fixed to the table and cannot be moved in the front-rear direction. That is, the rolls 4 and 5 of the bending apparatus B1 do not move in the front-rear direction. At least one of the rolls 4 and 5 is a drive roll connected to a drive means, and when the drive roll is rotated, the linear mold 1 and the bending mold 2 are sent out forward or rearward of the rolls 4 and 5. become. The linear mold 1 moves back and forth along a guide roller (not shown) disposed on the side thereof.

  The bending member manufacturing method using the mold movement type bending apparatus B1 also includes a profile preparation process, a profile arrangement process, a bending preparation process, a bending process, and a return process, as in the above-described embodiment. As shown in FIG. 8B, the bending process is a process of moving the linear mold 1 and the bending mold 2 to the front of the rolls 4 and 5, and the returning process is a process of moving the linear mold 1 and the bending mold 2 to the roll 4. , 5 to the rear.

  The bending process is performed with the cutting tool 6 positioned at the retracted position, and the returning process is performed with the cutting tool positioned at the cutting position.

  Also in the mold movement type bending apparatus B1 and the bending member manufacturing method using the same, a plurality of long product portions can be bent in a single bending step, so the number of bending members to be manufactured It is possible to reduce the number of bending processes. Further, since the plurality of long product parts are separated in the process of returning the pair of rolls 4 and 5 to the initial position, it is possible to quickly move to the next bending process (bending process performed on a new profile).

  In the above-described embodiment, the cutting tool 6 capable of moving back and forth in the inward / outward direction of the linear mold 1 is illustrated, but the linear mold 1 as in the mold moving type bending apparatus B2 shown in FIGS. 9B and 9C. It is also possible to use a cutting tool 6 ′ that extends in the longitudinal direction and is movable relative to the linear mold 1.

  The cutting tool 6 'has a strip shape. The front end of the blade 6 ′ is inserted between the linear mold 1 and the bending mold 2 from the rear end side of the linear mold 1, and is positioned between the rolls 4 and 5. The rear end of the cutting tool 6 'is fixed to a jig (not shown). In addition, although illustration is abbreviate | omitted, the blade 6 'is arrange | positioned according to the height position of the connection part S2 (refer FIG. 10) of the profile S. FIG.

  The blade 6 'is disposed at the position shown in FIG. 9B after the bending process is completed. Thus, when the returning process is performed with the cutting tool 6 ′ attached, the linear die 1 moves rearward along the cutting tool 6 ′ in a state where the tip of the cutting tool 6 ′ is in contact with the shape member S. The shape S is cut by the tip of '.

  Even in the bending apparatus B2 and the bending member manufacturing method using the bending apparatus B2, since two long product parts can be bent together in a single bending process, the bending process is performed more than the number of bending members to be manufactured. The number of times can be reduced. Further, since two long product portions are included in one shape member S, the amount of spring back generated in each long product portion becomes substantially equal, and as a result, two bent members obtained from one shape member S. The curvature of is almost the same. Furthermore, since a plurality of long product parts are separated in the process of returning the pair of rolls 4 and 5 to the initial position, it is possible to quickly shift to the next bending process (bending process performed on a new profile).

  Furthermore, if the cutting tool 6 'is used, the slit of the linear mold 1 becomes unnecessary, and the configuration of the linear mold 1 becomes simple.

  In the present embodiment, the case where two bending members are formed from one shape member S is illustrated, but three or more bending members can be formed from one shape member. In this case, the number of cutting tools corresponding to the number of cutting points may be arranged.

  Moreover, although the case where the shape of the long product portions S1 and S1 is vertically symmetric is illustrated in the present embodiment, it may be asymmetrical vertically.

B, B1, B2 Bending device 1 Linear die 2 Bending die 3 Presser member 4 Fixed roll 5 Movable roll 6 Cutting tool 7 Table 8 Support body 9 Geared motor (drive means)
S Profile S1 Long product part S2 Connecting part S3 Groove

Claims (8)

A shape preparation step for preparing a shape formed by arranging a plurality of long product portions that are the elements of a bending member in the short direction, and
A profile arrangement step of fixing the front end of the profile to a bending mold facing the linear mold while keeping the profile along a linear mold;
A bending preparation step of sandwiching the linear mold and the front part of the bending mold with a pair of rolls;
A bending step of moving the pair of rolls toward the rear of the linear mold, or moving the linear mold and the bending mold forward of the pair of rolls;
A step of moving the pair of rolls toward the front part of the linear mold, or returning the linear mold and the bending mold to the rear of the pair of rolls,
A bending member manufacturing method characterized by separating the plurality of curved long product portions when performing the returning step. In the profile preparation step, as the profile, a strip-shaped connecting portion is provided between the long product portions, and a groove is formed along both side edges of the connecting portion,
A plurality of the long product parts curved by performing the returning step in a state in which a cutting tool is in contact with the connecting portion between the pair of rolls, and cutting the connecting portion when performing the returning step. The manufacturing method of the bending member of Claim 1 characterized by the above-mentioned. In the profile preparation step, as the profile, a strip-shaped connecting portion is provided between the long product portions, and the connecting portion is formed thinner than the long product portion. And
A plurality of the long product parts curved by performing the returning step in a state in which a cutting tool is in contact with the connecting portion between the pair of rolls, and cutting the connecting portion when performing the returning step. The manufacturing method of the bending member of Claim 1 characterized by the above-mentioned. A linear mold arranged along the shape before bending,
A bending mold formed into a curved shape;
A pressing member for fixing the front end of the profile to the bending die;
A pair of rolls holding the linear mold and the bending mold;
E Bei and a cutting tool for cutting the profile of the deployed state between the linear and the bending tool in the longitudinal direction,
The cutting tool is bending processing apparatus you characterized in that it is disposed between the pair of rolls. A support for supporting the pair of rolls;
Drive means for advancing or reversing the support along the linear shape;
The bending apparatus according to claim 4 , wherein the blade is supported by the support. The linear type has a slit extending in its longitudinal direction,
The cutting tool can move relative to the longitudinal direction of the linear mold, can move forward and backward in the linear mold, and abuts against the profile through the slit. The bending apparatus according to claim 4 or 5 . The bending die has a concave groove extending in a longitudinal direction thereof,
The bending apparatus according to claim 6 , wherein a tip end portion of the cutting tool is opposed to an opening end of the concave groove. A linear mold arranged along the shape before bending,
A bending mold formed into a curved shape;
A pressing member for fixing the front end of the profile to the bending die;
A pair of rolls holding the linear mold and the bending mold;
E Bei and a cutting tool for cutting the profile of the deployed state between the linear and the bending tool in the longitudinal direction,
The cutting tool extends in the longitudinal direction of the linear mold and is movable relative to the linear mold,
The tip of the cutting tool is inserted between the end face of the linear of the linear and the bending tool, and bending processing apparatus you being located between the pair of rolls.

Images