WO2008102477A1 - 管材のプレス曲げ加工装置及び方法 - Google Patents
管材のプレス曲げ加工装置及び方法 Download PDFInfo
- Publication number
- WO2008102477A1 WO2008102477A1 PCT/JP2007/070505 JP2007070505W WO2008102477A1 WO 2008102477 A1 WO2008102477 A1 WO 2008102477A1 JP 2007070505 W JP2007070505 W JP 2007070505W WO 2008102477 A1 WO2008102477 A1 WO 2008102477A1
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- WO
- WIPO (PCT)
- Prior art keywords
- punch
- roll
- bending
- pipe
- pipe material
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
- B21D7/066—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies combined with oscillating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/04—Bending tubes using mandrels or the like the mandrel being rigid
Definitions
- the present invention relates to a pipe bending apparatus and a bending method for manufacturing automobile parts, building material parts, furniture parts, and the like.
- bending is the most widely used method.
- the advantage is that the pipe material is constrained by a wiper die, mandrel, pressure die, etc., so that wrinkles and buckling hardly occur inside the bend, and bending with a small bending radius is possible.
- many molds are required when performing a kind of bending process.
- a large rotary bending die is required when bending with a large bending radius, and the device itself must also be enlarged.
- the entire bend with a large bend radius is performed by bending a small bend radius and repeating a linear shape. Approximate is sometimes done, but because it is bent multiple times, the cycle time becomes longer and the productivity is not good.
- the curved shape is only a circular arc, and there is also a drawback that only one bending radius can be processed in principle.
- press bending is not limited to the method using a bending die and a support roller, as shown in Fig. 4 ("Plasticity and processing" Vol. 4 4, No. 5 0 8 (2 0 0 3), In some cases, the fulcrum does not rotate.
- press bending requires fewer dies and has the advantage of high productivity because bending can be performed only by moving the punch (bending die in Fig. 2).
- wrinkles and buckling are likely to occur inside the bend, and especially when the distance between the fulcrums is large, buckling is likely to bend at the point where the punch is pressed. .
- Press bending is a method of bending the pipe material while the pressing mold rotates around the bending mold as shown in Fig. 3. It is relatively similar to the above-mentioned pulling bend, and the difference is whether the bending mold rotates or the pressing mold rotates.
- a) to (d) respectively show FIGS.
- an object of the present invention is to provide a new pipe bending apparatus and bending method capable of satisfying these three characteristics.
- the gist of the present invention is as follows.
- a press bending apparatus that performs three-point bending of a tube material with a punch and a set of rolls.
- the punch has a groove on the outer periphery that is wider than the width of the tube material, and the set of nozzles is a frame And is movable on the gantry in a direction away from each other in contact with the punch, and the gantry allows the punch and the tube material to move during bending of the tube material.
- a press bending apparatus for a pipe material characterized by having a hollow portion for the purpose.
- a press bending apparatus for pipe materials characterized by comprising:
- a part or all of the cross-sectional shape of the central portion of the roll and the groove of the punch is a semicircular shape, an elliptical shape, a rectangular shape, a polygonal shape, or a shape combining curves.
- the press bending apparatus for pipe materials described in (2) is a part of the pipe material.
- a part of the pipe material is bulged, and a hollow portion in which the bulged portion can be attached is provided in the punch.
- the press bending apparatus for pipe material according to (6) further comprising a driving unit that rotationally drives the roll in a direction in which the pipe material is advanced toward the pipe end.
- the press bending apparatus for a pipe material according to (6) further comprising a driving unit that rotationally drives the roll in a direction in which the pipe material is advanced in a direction opposite to the pipe end.
- a method of bending a pipe material by bending the pipe material along the groove shape of the punch is a method of bending a pipe material by bending the pipe material along the groove shape of the punch.
- FIG. 1 is a diagram for explaining a conventional rotary pull bending method.
- FIG. 2 is a diagram for explaining a conventional press bending method.
- Fig. 3 is a diagram for explaining the conventional pressing and bending method.
- Fig. 4 illustrates the conventional press bending method in which the fulcrum does not rotate.
- FIG. 5 is a diagram for explaining a conventional pressing and bending method.
- FIG. 6 is a front view and a side view including a partial cross-sectional view illustrating the bending method in the case of using one set of rolls of the present invention in order ((a) ⁇ (b) ⁇ (c)). .
- Fig. 7 is a diagram for explaining the bending method when one roll of the present invention is used.
- '(A) is a cross-sectional view
- (b) is a cross-sectional view taken along line AA in (a). .
- FIG. 8 is a diagram showing the bending method of the present invention and the cross-sectional shape of the pipe material used in the present invention.
- (A) is a part of the bending method when using one set of the roll of the present invention.
- Front view including cross-sectional view, (b) to (e) 7070505 is a diagram showing an example of the shape of the AA cross section in (a) of the pipe material used in the present invention.
- FIG. 9 is a front view including a partial cross-sectional view for explaining the order in the case of bending using a high-end foam processed product in the present invention, and (a) is a high-end foam processed product on the roll side. (B) shows the case where there is an expanded portion of a processed product on the side where the punch exists.
- FIG. 10 is a diagram showing an example of a bending shape to which the present invention can be applied.
- A is a parabolic shape
- (b) is a shape combining a curve and a straight line.
- FIG. It is a figure explaining the case where it bends, transforming the pipe material of a circular section into a rectangular section
- (a)-(c) is the front view and side view including the partial sectional view showing the order of the bending method
- ( d) is a cross-sectional view taken along line AA in (a)
- (e) is a cross-sectional view taken along line BB in (b).
- FIG. 12 is a diagram illustrating an example of a groove shape of a punch and a roll when the cross-sectional shape is changed together with the bending process in the present invention, and a diagram illustrating a change in the cross-sectional shape due to the bending process, and (a) is a bending process.
- FIG. 13 is a view showing an example in which the groove cross-sectional shape of the punch and the roll is changed in the present invention
- (a) is a front view showing an example in which the groove shape cross-section of the punch is changed in the longitudinal direction.
- B) is an AA cross section of (a)
- (c) is a BB cross section of (a)
- (d) is a roll groove cross section that changes in the circumferential direction.
- (f) is BB cross section of (d).
- FIG. 14 is a diagram for explaining a case in which the roll slides with respect to the punch and the gantry in the present invention, and (a) is a front view including a partial cross-sectional view showing a bending state. (B) is a side view showing the state of bending, and (c) is an enlarged view of the G part of (a).
- FIG. 15 is a view for explaining a case where the roll rotates with respect to the punch and slides with respect to the gantry in the present invention
- (a) is a front view including a partial cross-sectional view showing a state of bending.
- Figure, (b) is a side view showing the state of bending
- (c) is an enlarged view of part G in (a)
- (d) is in (a)
- the rolls are out of rotation
- (e) is (A) shows the case where the rolls are inside each other.
- FIG. 16 is a diagram for explaining a case in which the roll slides with respect to the punch and rotates with respect to the gantry in the present invention.
- (A) to (c) indicate the order of the bending method.
- (d) is an enlarged view of the G part of (a).
- FIG. 17 is a view for explaining a case where the roll rotates with respect to the punch and the gantry in the present invention, and (a) includes a partial cross-sectional view showing a state of bending.
- FIG. 18 is a diagram for explaining a combination of a roll and a punch that can be bent in a three-dimensional shape and has a structure in which the roll can move in the axial direction of the roll in the present invention.
- FIG. 19 is a diagram for explaining the case where the upper surface of the gantry is acute with respect to the direction of punch movement in the present invention, and (a) to (c) are partial cross-sections showing the order of bending methods.
- (D) is an AA cross section of (a)
- (e) is an BB cross section of (b).
- FIG. 20 is a diagram for explaining Example 1 of the present invention, and (a) to (c 7070505
- (D) is an enlarged view of part G of (b).
- FIG. 21 is a view for explaining Example 2 of the present invention.
- (A) is a front view including a partial cross-sectional view showing a state of bending, and (b) is a side view showing a state of bending.
- Figure (c) is an enlarged view of part G of (a).
- FIG. 22 is a view for explaining Example 3 of the present invention.
- (A) is a front view including a partial cross-sectional view showing a state of bending
- (b) is a side view showing a state of bending.
- FIG. 23 is a diagram for explaining Example 4 of the present invention, where (a) is a front view including a partial cross-sectional view showing a state of bending, and (b) is a side view showing a state of bending.
- FIG. 23 is a diagram for explaining Example 4 of the present invention, where (a) is a front view including a partial cross-sectional view showing a state of bending, and (b) is a side view showing a state of bending.
- FIGS. 24 and 24 are diagrams for explaining Example 5 of the present invention, where (a) is a diagram showing a method for processing a pipe mouth, and (b) is an order for bending the pipes processed by the mouth mouth foam.
- FIG. 25 is a diagram for explaining Example 6 of the present invention.
- (A) to (c) are front views including a partial cross-sectional view showing the order of bending methods, and (d) is a diagram of (a).
- A-A sectional view, (e) is a BB sectional view of (b).
- FIG. 26 is a diagram for explaining Example 7 of the present invention.
- (A) to (c) are front views including a partial cross-sectional view showing the order of bending methods, and (d) is a diagram of (a).
- A-A sectional view, (e) is a BB sectional view of (b).
- FIG. 27 is a view for explaining an embodiment 8 of the present invention.
- (A) to (c) are cross-sectional views showing the order of the bending method.
- FIG. 6 shows an example in which the center of the circular pipe (pipe material) 11 is bent into an arc shape by the processing apparatus according to the embodiment of the present invention.
- this book The details of the processing apparatus and processing method of the invention will be described.
- the front view of the overall structure of the device is shown on the left, and the side view is shown on the right.
- the left side from the center line of the front view is an external view
- the right side from the center line is a central sectional view.
- This machine consists of punches 1 2, one set (two) of rolls 1 3 and 1 3, and a base 14.
- 1 2 a is provided on the outer peripheral surface of the punch 1 2 in contact with the circular tube 1 1.
- the central portion 3 1 of the roll 1 3 in contact with the circular tube 1 1 is a groove having the same cross section as the lower half of the circular tube 1 1, that is, a groove having a width equal to the diameter (width) of the circular tube 1 1 and a semicircular cross section.
- the gantry 14 supporting the roll 1 3 has a cavity 1 4 a having a width larger than any width of the punch 1 2 and the circular tube 1 1, and the descending punch 1 2 and the bending thereof are bent accordingly.
- the resulting circular tube 1 1 force S, this cavity 1 4 It can move to the a side.
- the gantry 14 is completely divided into two parts. However, if there is a sufficiently large cavity, it can be integrated on the lower side of the gantry. .
- a set of rolls 1 3 and 1 3 are installed on the base 14, and the end 30 of the roll 1 3 in contact with the outer periphery of the base 14 and the punch 1 2 has a cylindrical shape. 1 You can move up on 4.
- FIG. (A) shows the initial state.
- a force horizontal arrow in the figure
- the force loading method may be performed by a hydraulic cylinder or a spring. That's it
- the circular tube 1 1 is placed further above the pair of rolls 1 3 and 1 3 installed on the rack 14.
- the punch 12 is lowered from the upper side of the circular tube 11 (advanced toward the gantry 14 side). Then, the circular tube 11 is sandwiched between the semicircular groove 1 2 a of the punch 1 2 and the semicircular groove 1 3 a of the central portion 3 1 of the roll 1 3. At the same time, the punch 12 and the end 30 of the roll 13 are in contact with each other at the outer portion of the grooves 12a and 13a. Since the center of the outer peripheral surface of punch 1 2 in this example is an arc, when punch 1 2 is pushed downward in the vertical direction, rolls 1 3 and 1 3 try to move away from each other (outside). Power works.
- the rolls 1 3 and 1 3 have a force acting to bring them closer to each other.
- the ends 30 of the rolls 1 3 and 1 3 are moved downward as the punch 1 2 is lowered.
- the base 1 4 moves on the outer peripheral surface of the punch 1 2.
- the circular pipe 1 1 is bent so as to be pressed against the punch 1 2 by a pair of rolls 1 3 and 1 3.
- FIG. 7 shows an example in which the punch 1 2 is disposed below and the gantry 14 and the roll 1 3 are disposed upward.
- the right side of the circular tube 1 1 using the fixture 1 5 TJP2007 / 070505 Fix the end onto punch 1 2.
- a groove made of a semicircular shape having the same cross section as the lower half of the circular tube 1 1, that is, a groove having a width equal to the diameter (width) of the circular tube 1 1 1 2 a is provided on the outer peripheral surface of the punch 1 2 in contact with the circular tube 1 1, that is, a groove having a width equal to the diameter (width) of the circular tube 1 1 1 2 a is provided.
- the central portion 3 1 of the roll 1 3 in contact with the circular tube 1 1 is a groove made of a semicircle having the same cross section as the upper half of the circular tube 1 1, that is, a groove 1 having a width equal to the diameter (width) of the circular tube 1 1. It has a drum shape with 3 a.
- the frame 1 4 supporting the roll 1 3 has a cavity 1 4 a having a width larger than any of the widths of the punch 1 2 and the circular tube 1 1 when viewed from the side, and the punch 1 2 in the cavity 1 4 a And the circular tube 1 1 is movable.
- a T-shaped protrusion 1 3 b is provided at the upper part of the end 30 of the roll 1 3 in contact with the gantry 14, and the lower part of the gantry 14 is adapted to the cross section of the protrusion 1 3 b.
- a guide groove 14 b having a cross section is formed.
- the protrusions 1 3 b of the mouth 1 3 are fitted into the guide grooves 1 4 b of the gantry 1 4, and the roll 1 3 is supported by the gantry 1 4.
- the roll 13 is guided by the guide groove 14 b and can move along the lower surface of the gantry 14.
- the outer peripheral portion of the punch 12 and the end portion 30 of the roll 13 in contact with the gantry 14 are cylindrical.
- the gantry 14 and the roll 1 3 are lowered in a direction in which the punch 1 2 and the circular tube 1 1 are located in an integrated state. Pressing force is applied to roll 1 3 in the right direction (horizontal arrow in the figure). As a result, roll 1 3 is in contact with punch 1 2 as base 14 and roll 13 are lowered. Move as it is. Therefore, the circular tube 11 held between the roll 13 and the punch 12 is bent into a shape along the groove 12 a of the punch 12. Finally, the bending process is complete when the straight line 1 3 reaches the straight part of the punch 1 2. After that, if the platform 1 4 and the roll 1 3 are lifted, the bent pipe is processed. 1 1 can be taken out. In the example of Fig.
- the punch 1 2 is placed at the top, and in the example of Fig. 7, Punches 1 and 2 are placed below, but the same effect can be obtained by placing them in reverse. That is, the punch 1 2 in the example of FIG. 6 may be arranged below, the circular tube 1 1 may be placed thereon, and the gantry 14 and the roll 1 3 may be lowered from above, or the gantry in the example of FIG. 1 and 4 and roll 1 3 may be arranged below, and punch 1 2 with a part of circular tube 1 1 fixed may be lowered together with circular tube 1 1 from above. Further, these arrangements may be arranged not horizontally but horizontally, and the punch 12 or the gantry 14 and the roll 13 may be moved in the horizontal direction.
- the first advantage of the present invention is that the cost is low because the device is simple. Basically, all that is required is a press machine, and the machine is simple and low in cost. Also, when bending different bending shapes, only the punch 1 2 needs to be recreated, and the roll 1 3 and the base 14 can be used in common, thus reducing the die cost.
- the second advantage is high productivity. With normal bending, it takes about 20 to 30 seconds even with one bend, and with multiple bends it can take over 1 minute. In contrast, the bending method of the present invention can be bent in a few seconds because it can be bent with a single press.
- a third advantage is that wrinkles and buckling are unlikely to occur.
- wrinkles and buckling are likely to occur inside the bending.
- the distance between the fulcrums that is, the distance between the rolls 1 3 and 1 3 or the distance between the rolls 1 3 and the fixing jig 15 is initially short, bending occurs.
- the distance between the fulcrums gradually increases and the material is bent sequentially, so that it is finally possible to form a shape without wrinkles or buckling.
- the tube 11 was bent, but the cross-sectional shape of the pipe material does not have to be circular.
- the present invention can also be applied to rectangular and other irregular sections.
- pipes with internal ribs such as cross-sections of two rectangular shapes arranged side by side as produced by extruded aluminum, and pipes with ribs on the outside
- the present invention is applicable.
- the cross-sectional shape of the groove 12 2 a of the punch 12 and the cross-sectional shape of the groove 13 3 a of the central portion 3 1 of the roll 1 3 may be made to match each cross-sectional shape of the tube material.
- a processed product 16 that has been preformed by a hydroforming process or the like may be used.
- (A) in the figure is an example where there is a expanded foam expansion part 16a as the bulging part on the side where the rolls 1 and 1 3 are present. In this case, in the initial state, roll 1 If the expanded portion 16 a can be arranged at a position where it does not interfere with 3, 1 3, the bending method of the present invention can be used as it is.
- (b) in the figure is an example where there is a hydroform expansion section 16a in the direction in which the punch 12 is present. In this case, however, the expansion section 16a of the punch 12
- the digging portion 1 2 b in the example of FIG. 9, the lower portion of the center of the punch 1 2) as a hollow portion is provided, so that the expanded portion 16 a can be formed without being crushed during bending.
- the shape of the circular tube 1 1 need not be arcuate.
- the present invention can also be applied to a parabolic shape as shown in (a) of FIG. 10 and to a hyperbolic shape or a sinusoidal shape. Also, as shown in (b) of the figure, the shape may be a combination of those curves and straight lines.
- the cross-sectional shape of the tube material 1 1 and the cross-sectional shapes of the grooves 1 2 a and 13 3 a in the central portion 31 of the punch 12 and the roll 13 are the same.
- the cross section of the tube material 1 1 may be circular, and the shape of the grooves 1 2 a and 1 3 a in the central portion 3 1 of the punch 1 2 and rolls 1 3 and 1 3 may be rectangular.
- the entire section of the tube material 11 can be bent while deforming from a circular shape to a rectangular cross section. Originally, when a tube with a rectangular cross section 1 1 is bent, cross-section deformation, buckling, etc.
- the shape of the grooves 1 2 a and 1 3 a in the central part 3 1 of the punch 1 2 and rolls 1 3 and 1 3 can be not only rectangular, but also can be combined with polygons or curves as shown in Fig. 12. It is good, but the width of the grooves 1 2 a, 1 3 a. Should be equal to or greater than the width of the tube 1 1 so that the tube 1 1 can be inserted first. It is desirable that the total length of the circumferential lengths of the grooves 1 2 a and 1 3 a of the punch 1 2 and the central portion 3 1 of the roll 1 3 is approximately the same as the circumferential length of the pipe material 1 1, but Is acceptable. However, if the circumferential length of the grooves 1 2 a and 1 3 a is excessively large relative to the circumferential length of the pipe material 1 1, the accuracy of the cross-sectional shape after bending will be deteriorated. It may occur.
- the cross-sectional shapes of the grooves 12 a and 13 a do not need to be uniform in the longitudinal direction.
- the cross-sectional shape is square at both ends and circular at the other part.
- the pipe material 1 1 is deformed and bent at the same time.
- the cross section of the groove 13 a of the central portion 31 of the roll 13 may be repeatedly changed into a circular cross section and a quadrangular cross section in the circumferential direction. .
- the total circumferential length of the groove 1 2 a of the punch 1 2 and the central portion 3 1 of the roll 1 3 and the groove 1 3 a of the roll 1 3 is preferably the same as the circumferential length of the original tube 1 1. Therefore, it is better to design the sum of the circumferential lengths of the groove 1 2 a of the punch 1 2 and the groove 1 3 a of the central portion 3 1 of the roll 1 3 to be uniform.
- FIG. 14 shows a case where the roll 1 3 does not rotate with respect to the gantry 1 4 or the punch 1 2 and slides along the upper surface of the gantry 1 4.
- the lower surface of the end portion 30 of the roll 13 in contact with the base 14 is a flat surface
- the upper portion of the roll end portion 30 in contact with the punch 12 has a semicircular shape.
- the cross section of the groove 13 3 a of the central portion 31 of the roll 13 is semicircular.
- Advantages in this case are that the structure of rolls 1 and 1 and 3 is simple, and because the pipe material 1 1 is bent and pulled while being pulled in the longitudinal direction during bending, it is seated. The point where it is hard to bend is mentioned.
- the disadvantage is that the rolls 1 3 and 1 3 are difficult to move because of high frictional resistance.
- FIG. 15 shows an example in which the roll 13 slides without rotating with respect to the gantry 14 and moves with rotation with respect to the punch 12.
- the lower surface of the end 30 of the roll 13 in contact with the gantry 14 is a flat surface.
- the central part 31 of the roll 13 in contact with the punch 12 has a drum-like circular shape and is rotatable independently of the roll end 30.
- the cross section of the groove 13 3 a of the central portion 31 of the roll 13 is semicircular. In this case, since the roll 13 can move with little resistance to the punch 12, it is particularly effective when bending while changing the cross-sectional shape of the tube 11 as shown in FIG. 11. Also, as shown in (d) to (f) of Fig.
- the shape of the groove 13 3 a of the central portion 3 1 of the roll 1 3 is changed in the longitudinal direction to change the cross-sectional shape of the tube material 1 1 outside the bend. It is also possible to bend while. However, the structure of the rolls 13 is complicated, and the tensile force against the pipes 11 is reduced. Therefore, as shown in Fig. 15 (d), if the rolls 1 3 and 1 3 are driven outward (that is, in the direction in which the pipe 1 1 is advanced toward the pipe end), the pipe 1 1 The tensile force can be increased, and it is effective in suppressing buckling during bending. Conversely, as shown in Fig.
- a roll 17 having a flat contact portion with the punch 1 2 as shown in FIG. 16 can be considered.
- the end 70 of the roll 1 7 that contacts the gantry 14 is cylindrical, and the center 7 1 of the roll 1 7 that contacts the punch 1 2 has a rectangular parallelepiped outer shape.
- the mouth end 70 is rotatable independently of the roll center 7 1, and the roll center 7 1 can follow the angle of the shape of the groove 1 2 a of the punch 1 2.
- the groove 17 a of the central portion 71 of the roll 17 has a semicircular cross section.
- the pipe material 1 1 can be crushed on a wide surface, which is effective in preventing local crushing.
- the central portion of the tube material 1 1 that cannot be crushed at the initial stage of bending with the circular roll 1 3 can be crushed by using this flat sculpture 1 7.
- the flat rolls 17 and 17 are taken as one example of sliding with respect to the notch 12 and rotating with respect to the mount 14 as shown in FIG.
- the present invention can also be applied to the case shown in FIG.
- Fig. 17 shows an example in which rolls 1 3 and 1 3 rotate with respect to gantry 14 and punch 1 2.
- the end 30 of the roll 13 in contact with the gantry 14 has a cylindrical shape
- the central part 31 of the roll 13 in contact with the punch 12 has a drum-like circle.
- the mouth end 3 0 and the roll center 3 1 are independently rotatable.
- the cross section of the groove 13 3 a of the central portion 31 of the roll 13 is semicircular.
- Fig. 14 Rolling resistance of roll 1 3 is less than the example shown in Fig. 4 to Fig. 16 and the movement is smooth, but the tensile force in the longitudinal direction against pipe material 1 1 is reduced, so it is buckled. It is disadvantageous for this.
- the shape of the gantry 14 will be described.
- the surface of the gantry 14 on which the roll 13 moves is an angle perpendicular to the traveling direction of the punch 12.
- the progress of punch 1 2 This makes it difficult to move the rolls 1 and 3 in the direction of pulling them apart. Therefore, as shown in Fig. 19, if the platform 1 8 is used so that the angle of the surface on which the roll 17 moves is acute with respect to the direction in which the punch 12 moves, the roll 1 7 can be smoothly moved even at the beginning of bending. Can move.
- the roll 1 7 can be smoothly moved from the beginning. It becomes possible to move.
- the lower surface of the end portion 30 of the roll 13 in contact with the gantry 14 is a flat surface
- the upper portion of the roll end portion 30 in contact with the punch 12 has a semicircular shape.
- the cross section of the groove 13 3 a of the central portion 3 1 of the roll 1 3 is semicircular.
- the shape of the groove 13 a was a semicircular cross section having the same diameter as the outer diameter of the tube material 11 on both the punch 12 side and the roll 13 side. As the final position, the punch 1 2 was pushed in until the distance between the centers of the two rolls 1 3 and 1 3 became 400 mm.
- the roll 13 has a structure in which the circular wheel 30 (roll end 30) can move while rotating on the gantry 14, and half the punch 13.
- the central part 31 of the drum-shaped mouth with a circular cross section can move while rotating.
- the axle 3 2 connecting the wheel portion 30 on the gantry 14 and the drum-shaped roll center 3 1 contacting the punch 12 is fixed to the roll center 3 1.
- it has a structure that can rotate freely with the wheel part 30.
- the dimensions of the mouthpiece 1 3 are as follows: the wheel part 30 has an outer diameter of 48 mm, the drum-shaped roll central part 31 has an outer diameter of 50.8 mm, and the grooves 1 3 a and 13 a The distance is 25.4 mm.
- driving means 40 that rotationally drives the roll 13 in the direction in which the pipe material 11 is advanced toward the pipe end is used for driving the roll 13.
- the driving means 4 0 includes a motor 4 1 and a low 7 A chain 4 2 for rotating the axle 3 2 of 070505 Le 1 3 was arranged, and the axle 3 2 was forcibly rotated from the motor 4 1 through the chain 4 2. That is, the direction of rotation was the direction in which the two rolls 1 3 and 1 3 face each other.
- Example 3 In contrast to Example 3, only the driving direction of the rolls 13 was reversed.
- the driving means 50 is provided with a chain 5 2 for rotating the axle 5 1 and the axle 3 2 of the roll 1 3 so that the two rolls 1 3, 1 3 are rotated in the direction toward each other. (See Fig. 23).
- Table 1 shows a list of the results of the presence or absence of buckling inside the bend and the indentation load when bending in Examples 1 to 4 above. For comparison, the results of the conventional three-point bending method are also shown.
- the fulcrum having the same shape as the roll 13 of Example 1 was used as the fulcrum for the three-point bending, and the distance between the fulcrums was set to 400 mm, which was the same as the final position of Examples 1 to 4.
- Example 4 when the rolls 13 are rotated inward with respect to each other, the pushing load can be reduced.
- the method of Example 4 is effective to bend a thick-walled material so that buckling does not become a neck with a small force.
- Fig. 24 shows an example in which a processed product 16 obtained by primary processing of a pipe material 11 to be bent is not a simple straight pipe but a primary form.
- outer diameter 25.4 mm, wall thickness 2.0 mm, total length 5400 mm, steel grade ST KM 2 OA (thickness used in Examples 1 to 4 2. same tubing as Ot material 1 1 A 60 mm long material) is molded into a shape with a 30 mm high tube expansion part 16 a.
- the conditions of the foam mouth form were an internal pressure of 10 MPa and a shaft push of 30 mm from both ends. Therefore, the length after molding the foam mouth is 4800 mm. Bend the expanded part 1 6a of the hydroformed product 1 6 with the pipe expansion part 1 6 a positioned below.
- the punch 1 2 and roll 1 3 shapes and the distance between the final rolls 1 3 and 1 3 are the same as in Examples 1 to 4. 7070505
- the moving conditions of roll 1 3 were the rotation conditions for punch 1 2 and the sliding conditions for frame 1 4.
- Fig. 25 shows the thickness of the pipe used in Examples 1 to 4 and the same tube material as the 1 t material.
- the perimeter the total perimeter of the inner surfaces of the grooves 1 2 a and 1 3 a of punch 1 2 and roll 1 3 is 7 9. 8 5 whereas the outer circumference of the original pipe is 7 9.80 mm. It was set to mm and was set to almost the same circumference.
- the position in the axial direction of the groove 1 2 a of the notch 1 2 was designed not to be on a plane parallel to the pushing direction but to pass on a plane inclined by 10 °.
- the roll end 30 is cylindrical so that the roll 13 can move in the axial direction, and the center of the mouth so that it can move during bending while following the position of the groove 1 2 a of the punch 1 2
- the part 3 1 is movable in the axial direction of the roll 1 3.
- rolls 1 3 and 1 3 were pushed in until they reached the end of the tube, and the cross-section was deformed over the entire length.
- Other conditions are the same as in Example 2.
- Fig. 26 shows an example in which the center part of the punch 12 is bent with a flat shape. Moreover, since the cross section of the tube 11 including the flat part is deformed into a rectangle, the rolls 13 and 13 need to start moving from the center position. Therefore, the surface of the gantry 1 8 on which the ends 30 of the rolls 1 3 and 1 3 move is acute with respect to the direction of travel of the punch 12 (downward in FIG. 26). As shown in the figure, the pedestal 18 was tilted 15 ° downward with respect to the horizontal plane as shown in the figure to make it easier for the rolls 1 3 and 1 3 to move outward.
- the cross section of the roll central portion 3 1 is also formed into a rectangular shape, the cross sectional shape of the roll central portion 3 1 is not a circle but a rectangle.
- the roll center portion 31 and the roll end portion 30 are independently rotatable, and the roll center portion 31 can follow the angle formed by the shape of the groove 12 a of the punch 12.
- the same pipe material 11 as the 2.0 t material used in Examples 1 to 4 was used as the pipe material 11.
- rolls 1 3 and 1 3 were pushed in until they reached the end of the tube, and the cross-section was deformed over the entire length. As a result of bending, a molded product with a rectangular cross section and bent at both ends was obtained.
- Fig. 27 shows an example of bending the pipe 1 1 at one place with one roll 1 3.
- the grooves 1 2 a and 1 3 a of the punch 1 2 and the roll 1 3 have a simple circular cross section, and the pipe material 1 1 has the same thickness as the 2.0 t material used in Examples 1 to 4. 1 1 was used.
- roll 1 3 slides with respect to gantry 14, and rotates with respect to punch 1 2, so that the upper surface of roll end 3 0 in contact with gantry 14 is a flat surface and roll in contact with the outer periphery of punch 1 2
- the lower part of the end 30 is semicircular (not shown).
- the roll central portion 31 was formed into a drum shape having a semicircular groove 13 a (not shown).
- the initial position of roll 1 3 is pressed by stopper 19 to the position shown in Fig. 26 (a).
- a molded product was obtained in which one side was straight and only the other side was bent.
- the present invention is useful for bending of pipe materials used for manufacturing automobile parts, building material parts, furniture parts, and pipe materials used for piping in various facilities.
- bending of a large bending radius which has a high equipment cost and mold cost, can be reduced at a low cost, and a highly productive bending process can be realized. Production costs can also be reduced.
- wrinkling and buckling that occurs in the inside of the bend in conventional press bending, which was impossible to process, can be processed without causing wrinkles and buckling.
- the application range of pipe bending parts for automobile parts, building material parts, furniture parts, etc. will be further widened, which not only contributes to weight reduction but also reduces production costs.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0721361A BRPI0721361A2 (pt) | 2007-02-21 | 2007-10-16 | aparelho e método para dobramento por pistão hidráulico de um material tubular |
CA2678716A CA2678716C (en) | 2007-02-21 | 2007-10-16 | Apparatus and method for ram bending of tube material |
KR1020097017338A KR20090104871A (ko) | 2007-02-21 | 2007-10-16 | 관재의 프레스 굽힘 가공 장치 및 방법 |
CN2007800516564A CN101616758B (zh) | 2007-02-21 | 2007-10-16 | 管材的压弯加工装置及其方法 |
EP07830239.5A EP2127774B1 (en) | 2007-02-21 | 2007-10-16 | Apparatus and method for press-bending tube material |
US12/449,616 US9486851B2 (en) | 2007-02-21 | 2007-10-16 | Apparatus and method for ram bending of tube material |
US15/270,585 US10406579B2 (en) | 2007-02-21 | 2016-09-20 | Apparatus and method for ram bending of tube material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007041283A JP5005378B2 (ja) | 2006-04-17 | 2007-02-21 | 管材のプレス曲げ加工装置及び方法 |
JP2007-041283 | 2007-02-21 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/449,616 A-371-Of-International US9486851B2 (en) | 2007-02-21 | 2007-10-16 | Apparatus and method for ram bending of tube material |
US15/270,585 Division US10406579B2 (en) | 2007-02-21 | 2016-09-20 | Apparatus and method for ram bending of tube material |
Publications (1)
Publication Number | Publication Date |
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WO2008102477A1 true WO2008102477A1 (ja) | 2008-08-28 |
Family
ID=39709760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/070505 WO2008102477A1 (ja) | 2007-02-21 | 2007-10-16 | 管材のプレス曲げ加工装置及び方法 |
Country Status (7)
Country | Link |
---|---|
US (2) | US9486851B2 (ja) |
EP (1) | EP2127774B1 (ja) |
KR (1) | KR20090104871A (ja) |
CN (1) | CN101616758B (ja) |
BR (1) | BRPI0721361A2 (ja) |
CA (1) | CA2678716C (ja) |
WO (1) | WO2008102477A1 (ja) |
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CN102019309A (zh) * | 2010-11-08 | 2011-04-20 | 河南机电高等专科学校 | 一种弯管机 |
US20220396223A1 (en) * | 2019-11-07 | 2022-12-15 | Auto-Kabel Management Gmbh | Power cable for motor vehicles and a method for bending a power cable for motor vehicles |
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US20110185574A1 (en) * | 2008-08-08 | 2011-08-04 | Delphi Technologies, Inc. | Method for manufacturing a bent heat exchanger |
CN101885015B (zh) * | 2010-04-26 | 2011-12-21 | 晋西工业集团有限责任公司 | 一种金属棒料异形环状成形模具及成形方法 |
CN101829716B (zh) * | 2010-05-04 | 2011-07-27 | 吉林省昊宇石化电力设备制造有限公司 | 核电主管道压制方法 |
KR101279798B1 (ko) * | 2011-04-07 | 2013-06-28 | 주식회사 성우하이텍 | 스트레치 벤딩장치 |
CN102151728B (zh) * | 2011-05-09 | 2012-07-25 | 江苏同力机械有限公司 | 客车车体弯梁冷弯成型工艺 |
KR101132411B1 (ko) * | 2011-06-14 | 2012-04-03 | 삼호전자(주) | 프레스금형 |
GB201114438D0 (en) * | 2011-08-22 | 2011-10-05 | Airbus Operations Ltd | A method of manufacturing an elongate component |
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US9358593B1 (en) * | 2013-08-31 | 2016-06-07 | Colin William Hopper | Tube bender |
JP6341292B2 (ja) * | 2014-10-03 | 2018-06-13 | 新日鐵住金株式会社 | プレス成形品の製造方法 |
CN106238498A (zh) * | 2016-08-04 | 2016-12-21 | 亚太轻合金(南通)科技有限公司 | 一种铝合金方型弯管加工方法 |
JP7025955B2 (ja) * | 2018-02-22 | 2022-02-25 | 三桜工業株式会社 | 曲げ型へのチューブ自動嵌め込み装置 |
CN109967583B (zh) * | 2019-04-05 | 2024-02-20 | 宁波世辰汽车部件有限公司 | 小弯头成型专机 |
US11213873B2 (en) * | 2019-06-21 | 2022-01-04 | Fci Holdings Delaware, Inc. | Mine bolt bending system |
CN111922149B (zh) * | 2020-09-03 | 2024-04-16 | 济南迈科管道科技有限公司 | 一种制备标准大半径钢管弯管产品的设备 |
US11357543B1 (en) * | 2020-12-31 | 2022-06-14 | Giovanna McCarthy | Curved cannula |
CN113083961B (zh) * | 2021-04-08 | 2022-06-03 | 常州大学 | 一种薄壁钢管直角弯头的免挤压折弯设备 |
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US20220396223A1 (en) * | 2019-11-07 | 2022-12-15 | Auto-Kabel Management Gmbh | Power cable for motor vehicles and a method for bending a power cable for motor vehicles |
Also Published As
Publication number | Publication date |
---|---|
CA2678716C (en) | 2012-09-18 |
KR20090104871A (ko) | 2009-10-06 |
US20170008057A1 (en) | 2017-01-12 |
EP2127774B1 (en) | 2016-12-21 |
EP2127774A1 (en) | 2009-12-02 |
CN101616758A (zh) | 2009-12-30 |
US20100011832A1 (en) | 2010-01-21 |
CA2678716A1 (en) | 2008-08-28 |
EP2127774A4 (en) | 2013-07-10 |
US10406579B2 (en) | 2019-09-10 |
CN101616758B (zh) | 2012-07-11 |
BRPI0721361A2 (pt) | 2015-09-29 |
US9486851B2 (en) | 2016-11-08 |
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