JP2017189790A - End part press flexure device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for press-flexure-processing an end part of a fan-shaped flat raw material in an end part shape of a taper tube raw section.SOLUTION: An end part press flexure device comprises right-left slide guides 11 extending along a both-leg frame part 10A of a portal frame 10 of forming a U shape, a pair of right-left shaft guides 12 extending downward from a connection frame part and right-left cylinders 13 and a rotary shaft 20 freely slidable and rotatable between the pair of right-left shaft guides, and comprises a press ram 14 press-operated downward with simultaneous operation of the right-left cylinders, slidingly contacting both side parts with the right-left slide guides, inclined around the rotary shaft with individual operation of the cylinders and maintaining sliding contact with the right-left slide guides in an inclined state by circular-arc-shaped both side parts 14A, a male die 15 installed on an undersurface of the press ram and having a cross-sectional circular-arc convex part on a die surface and a female die 16 for press-flexure-processing a narrow part in an end part of a flat raw material by a cross-sectional concave part of the die surface and a die surface cross-sectional circular-arc convex part of the male die.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an end press bending apparatus, and in particular, when bending a fan-shaped flat plate material into a tapered tube shape material, the end portion of the flat plate material is press-bended with high accuracy into the end shape of the tapered tube shape material. It relates to the device.

  Metal pipes such as steel pipes are widely used for structures such as columns and machinery, but recently, instead of straight pipes, tapered pipes with continuously changing pipe diameters have been used.

  Conventionally, a processing method for manufacturing a tapered tube by forming a trapezoidal flat plate material into an annular shape by U-O press processing and welding a butt end edge has been proposed (Patent Document 1). There was a case that the bending mark of left.

  In addition, the three rolls are arranged at the positions of the respective apexes of the triangle, and the distance between the one ends of the two lower rolls is set smaller than the distance between the other ends, while each roll is in the longitudinal direction. Dividing into multiple parts, the roll part on one end side is driven at a low speed, the roll part on the other end side is driven at a high speed, the intermediate roll part on one end side and the other end side is driven, and two lower rolls and one roll Set a fan-shaped flat plate material between the upper roll of the machine, process the small-diameter portion of the flat plate material at one end, process the large-diameter portion of the flat plate material at the high-speed portion, and reduce the diameter from the small-diameter portion to the large-diameter portion. Has been proposed, and a bending roll device for bending a tapered tube base shape has been proposed (Patent Document 2). However, since this bending roll apparatus is bent by a plurality of divided rolls, it is easy to form a step on the surface of the tapered tube shaped member.

  On the other hand, the present applicant arranges the three rolls in parallel with each other at the positions of the respective apexes of the triangle, arranges a pair of front and rear pads on the outside of the two lower rolls, and places the fan-shaped flat plate material at the four corners. After positioning the flat plate material between the pads, the pad at the four corners is retracted, the partial fan-shaped portion of the flat plate material is partially bent into an arc shape with three rolls, and this material is sent in the roll width direction By repeating the above-described operation, a bending roll apparatus was proposed which bends the tapered tube shaped material (Patent Document 3).

JP-A-55-1000081 JP 2007-15014 A JP 2006-159251 A

  However, the roll bending apparatus described in Patent Document 3 cannot perform the bending process of the starting end portion of the flat plate material at the start of the partial bending process, so that the large angle range of the starting end portion of the flat plate material is changed to the end shape of the tapered tube shape material. There was a problem that it was necessary to bend.

  In view of such problems, the present invention provides an end press that can bend the end of a flat plate material into the end shape of a tapered tube shape material when bending a fan-shaped flat plate material into a tapered tube shape material. It is an object to provide a bending apparatus.

  Therefore, the end press bending apparatus according to the present invention tapers the end of the fan-shaped flat plate material by repeating the partial press bending process of the narrow width by the female mold and the male mold on the end of the fan-shaped flat plate material. An end press bending apparatus for bending into an end shape of a tube-shaped member, and a gate-shaped frame having a U-shape composed of both leg frame portions and a connecting frame portion extending between the upper ends of the both leg frame portions; Left and right slide guides extending along the both leg frame portions, a pair of left and right shaft guides extending downward from the connecting frame portion of the portal frame, and left and right cylinders extending downward from the connecting frame portion of the portal frame; It is connected to the rods of the left and right cylinders, and includes a rotation shaft that is slidable and rotatable between the pair of left and right shaft guides. It is pressed downward by the time operation, both sides are slidably contacted with the left and right slide guides to guide the press operation, and can be rotated and tilted around the rotation shaft by the individual operation of the left and right cylinders. A press ram that has a circular arc shape and maintains sliding contact with the left and right slide guides in an inclined state; a male die that is attached to the lower surface of the press ram and has a cross-section arc convex portion on the mold surface; The mold surface has a concave section that is opposite to the cross-section arc convex section of the male mold face, and the end of the flat plate material is formed by the cross-section concave section and the male mold section cross-section arc convex section. And a female die that performs a partial press bending process with a narrow width.

One of the features of the present invention is that the male mold is inclined obliquely so that the fan-shaped flat plate material has a narrow (small diameter) arc shape in the longitudinal direction of the mold surface and a large (large diameter) arc shape on the other side. It is in the point to bend.
As a result, it is possible to perform partial bending obliquely from one end of the fan-shaped flat plate material toward the other, that is, to efficiently perform partial bending to the end shape of the tapered tube element. By repeating while feeding the flat plate material, it is possible to efficiently bend the end portion of the fan-shaped flat plate material with a predetermined width into the end shape of the tapered tube element.

  In the above description, the male mold is tilted. However, the same action can be achieved even when the female mold is tilted. That is, the partial press bending apparatus according to the present invention repeats a narrow partial press bending process with a female mold and a male mold on the end portion of the fan-shaped flat plate material to thereby taper the end portion of the fan-shaped flat plate material. An end press bending apparatus for bending into an end shape of a base material, comprising a gate-shaped frame having a U-shape comprising both leg frame portions and a connecting frame portion extending between upper ends of the both leg frame portions, A cylinder extending downward from a connecting frame portion of the gate-shaped frame, a cylinder connected to the cylinder rod, a press ram pressed downward by the operation of the cylinder rod, and a lower surface of the press ram; A male mold having a cross-section arc convex portion on the mold surface, and a mold section having a cross-section concave portion facing the cross-section arc convex portion of the male mold surface, the cross-section concave portion and the male mold surface With the surface arc convex part, the end of the flat plate material is subjected to partial press bending with a narrow width, while being rotatable around a rotation axis extending in a direction perpendicular to the concave part of the cross section of the mold surface. And a weight that tilts one end or the other end of the concave section of the mold surface of the female mold downward, and one end or the other end of the female mold is made to slide by sliding. A tilting wedge piece that tilts around the rotation shaft against the weight, and a cylinder that slides the tilting wedge piece are provided.

  One of the features of the present invention is that the female mold can be rotated around the rotation axis. Specifically, the following structure can be adopted. The base block on which the female mold is mounted is composed of a swinging portion having a weight and being rotatable about a rotation shaft, and a base portion for receiving the swinging portion in a rotatable manner. Alternatively, it is configured such that one end side or the other end side of the female mold is tilted around the rotating shaft against the weight of the weight by inserting and sliding between the other end side and the swinging portion. Can do.

  When the female mold is tilted by the tilting wedge piece, it is necessary to take measures to reduce and suppress rattling of the female mold. Therefore, it is preferable to further include a holding wedge piece for positioning and holding the female die by sliding and a cylinder for sliding the holding wedge piece.

  Specifically, the base block on which the female mold is mounted is composed of a swinging portion that has a weight and is rotatable around a rotation shaft, and a base that rotatably receives the swinging portion, and is slid. A holding wedge piece for positioning and holding the female die and a cylinder for sliding the holding wedge piece, and the holding wedge piece is inserted between the other end side or one end side of the female die and the swinging portion to slide. By doing so, the female mold can be configured to be positioned and held.

  If the concave section of the female mold has a V-shaped section like that of a normal press female mold, it is not possible to bend the portion 3 to 4 times the plate thickness into a conical shape among the starting end portions of the fan-shaped flat plate material. . In view of this, it is preferable to mount a starting end portion of a fan-shaped flat plate material on the inner edge of the upper end of the concave section of the female mold so as to form a step portion for performing a partial press bending process with a narrow width.

It is a schematic front view which shows the structure of preferable embodiment of the edge part press bending apparatus which concerns on this invention. It is a figure which shows the shape of the press ram in the said embodiment. It is a figure which shows typically the partial bending process with respect to the edge part of the fan-shaped flat material in the said embodiment. It is a figure which shows the partial bending process with respect to the start end part of the fan-shaped flat plate material in the said embodiment. It is a schematic front view which shows the structure of 2nd Embodiment.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 4 show a preferred embodiment of an end press bending apparatus according to the present invention. In the figure, an end press bending apparatus is installed on a floor board, and the end press bending apparatus includes a portal frame 10, and the portal frame 10 is connected between upper ends of both left and right leg frame sections 10A by a connecting frame section 10B. It has a U shape.

  Left and right slide guides 11 are attached to the left and right leg frame portions 10A of the portal frame 10 along the left and right leg frame portions 10A, and a pair of left and right shaft guides 12 are provided on the connecting frame portion 10B of the portal frame 10 in a predetermined manner. And are fixed to extend downward.

  The left and right cylinders 13 extend downward from the connection frame portion 10B outside the shaft guide 12 and are suspended from the connection frame portion 10B of the portal frame 10 and the press ram 14 is attached to the rod 13A of the left and right cylinders 13. The press ram 14 is provided with a rotary shaft 20, and the rotary shaft 29 is slidably and rotatably provided between a pair of left and right shaft guides 12.

  The press ram 14 is pressed downward by the simultaneous movement of the rods 13A of the left and right cylinders 13, and both side portions 14A of the press ram 14 are slidably contacted with the left and right slide guides 11 to guide the press operation.

  Further, the press ram 14 is provided so as to be able to be rotated and tilted around the rotary shaft 20 by the individual operation of the left and right cylinders 13, and both side portions 14A of the press ram 14 are formed in an arc shape. The sliding contact is maintained.

  A male die 15 is attached to the lower surface of the press ram 14, and a cross-section arc convex portion 15 </ b> A is formed on the die surface of the male die 15 so as to extend in the transverse direction of the die. Are arranged.

  Also, the base block 17 is installed on the floor surface, and the female die 16 is mounted on the base block 17, and the female die 16 has a concave cross-sectional portion 16 </ b> A in the cross-section arc convex portion 15 </ b> A of the male die 15. The end portion of the flat plate material 30 is subjected to a partial press bending process with a narrow arc shape by the concave section 16A of the cross section and the convex section 15A of the mold surface cross section of the male mold 15. It is like that.

  Further, a step 16B is formed on one side of the inner edge of the upper end of the concave section 16A of the female die 16, and a starting end portion 30A of a fan-shaped flat plate material 30 is mounted on the step 16B and a narrow arc-shaped partial press is mounted. Bending is made.

  When the end of the fan-shaped flat plate material 30 is press-bended, when the rod 13A of the cylinder 13 on the side corresponding to the inside of the fan-shaped flat plate material 30 of the male mold 15 is extended, as shown in FIG. Can incline the press ram 14 at an angle within a maximum range of 5 ° while maintaining sliding contact with the slide guide 11.

  In this state, as shown by the one-dot chain line in FIG. 3A and FIG. 4, end portions of the flat plate material 30 are set so as to straddle the cross-sectional concave portion 16A of the mold surface of the female die 16, and the left and right cylinders 13 When the rod 13A is operated simultaneously, that is, synchronously extended, the cross-section arc convex portion 15A of the male mold 15 partially press-bends the end portion of the flat plate material 30 while the press ram 14 maintains the inclination angle.

  At this time, since the male mold 15 is inclined, the side corresponding to the inner side of the fan-shaped flat plate material 30 is formed in a small-diameter arc shape, the side corresponding to the outer side is formed in a large-diameter arc shape, and the two are continuous. And is bent into a partial arc shape, and the partial arc-shaped bending process is repeated while feeding the flat plate material 30 one after another.

  Next, as shown in FIG. 3B, the end portion on the opposite side of the fan-shaped flat plate material 30 is similarly subjected to a partial arc-shaped bending process, so that a flat plate is obtained as shown in FIG. Both end portions of the material 30 can be bent into the end shape of the tapered tube shape member.

  Moreover, about the starting end part 30A of the flat plate material 30, a part 3 to 4 times the plate thickness cannot be partially bent into a conical shape. Therefore, as shown in FIG. 4, the starting end portion 30A of the fan-shaped flat plate material 30 is placed on the step portion 16B on one side of the inner edge of the upper end of the concave section 16A of the female die 16, and a narrow partial press bending process is performed. Then, the partial arc-shaped press bending process can be performed also on the start end portion 30A.

  The intermediate portion of the flat plate material 30 can be bent into the shape of a tapered tube shape by, for example, a known roll bending process.

  FIG. 5 shows a second embodiment. In the figure, the same reference numerals as those in FIG. 1 to FIG. In this example, the press ram 14 is pressed while maintaining a horizontal posture, while the portion of the base block 17 on which the female die 16 is mounted can be tilted.

  That is, the end press bending apparatus of this example is installed on the floor board. In the end press bending apparatus, the portal frame 10 has a U-shape in which the upper ends of the left and right leg frame sections 10A are connected by the connecting frame section 10B. It has become.

  Left and right slide guides 11 are attached to the left and right leg frame portions 10A of the portal frame 10 along the left and right leg frame portions 10A, and the left and right cylinders 13 are connected to the connection frame portion 10B of the portal frame 10. The press ram 14 is connected to the rods 13A of the left and right cylinders 13 and is pressed downward by the simultaneous operation of the rods 13A of the left and right cylinders 13, and the left and right slide guides 11 are suspended. To be guided by.

  A male die 15 is attached to the lower surface of the press ram 14, and an arc-shaped convex section 15 A is formed on the die surface of the male die 15 so as to extend in the lateral direction of the die. A female die 16 is opposed to the lower side of the male die 15. Are arranged.

  The base block 17 is composed of a swinging portion 17B that can rotate around a rotating shaft 17C and a base portion 17A that can rotatably receive the swinging portion 17B, and a weight 17D is formed on one side of the swinging portion 17B. Thus, the oscillating portion 17B is urged to rotate about the rotating shaft 17C.

  Further, a recess is formed in one side portion and the other side portion of the swinging portion 17B, and tip portions of the tilting wedge piece 18A and the holding wedge piece 18B are inserted into the recess, and the inclined surface is the bottom surface of the female die 16. The rod of the cylinder 19 is connected to the bases of the tilting wedge piece 18A and the holding wedge piece 18B, and the cylinder 19 is fixed to a block on the floor surface.

  A recess is formed on the upper surface of the base portion 17A of the base block 17, and a receiving surface having an arcuate cross section is formed on the other half of the recess to receive the other half of the swinging portion 17B. The one end side half of the recess is formed in a space in which the weight 17D of the swinging portion 17A can move.

  Further, the tilting wedge piece 18A and the holding wedge piece 18B are received by the upper edge of the concave portion of the base portion 17A of the base block 17, whereby the sliding of the tilting wedge piece 18A and the holding wedge piece 18B is guided and added to the female die 16. It is designed to withstand the press load.

  When the end of the fan-shaped flat plate material 30 is press-bended, the tilting wedge piece 18A is pushed and pulled to rotate the swinging portion 17A of the base block 17 around the rotating shaft 17C, and the swinging portion 17A is moved up to 5 °. Tilt to an angle within the range of. At the same time, the holding wedge piece 18B is pushed and pulled to position and hold the swinging portion 17A, thereby reducing and suppressing rattling of the swinging portion 17A.

  In this state, when the end of the flat plate material 30 is set so as to straddle the cross-sectional concave portion 16A of the mold surface of the female die 16, and the rods 13A of the left and right cylinders 13 are simultaneously operated, that is, are extended synchronously, the press ram 14 is The pressing operation is performed so that the circular arc convex portion 15A of the male mold 15 partially press-bends the end portion of the flat plate material 30.

  At this time, since the female mold 16 is inclined, the side corresponding to the inner side of the fan-shaped flat plate material 30 has a small-diameter arc shape, the side corresponding to the outer side has a large-diameter arc shape, and the two are continuous. And is bent into a partial arc shape, and the partial arc-shaped bending process is repeated while feeding the flat plate material 30 one after another.

  Next, when the end portion on the opposite side of the fan-shaped flat plate material 30 is similarly repeatedly subjected to the partial arc-shaped bending process, both end portions of the flat plate material 30 can be bent into the end shape of the tapered tube shape material. .

  Further, since the portion of the starting end portion 30A of the flat plate material 30 that is 3 to 4 times the plate thickness cannot be partially bent into a conical shape, a step on one side of the upper end inner edge of the recessed section 16A of the female die 16 is formed. When the start end portion 30A of the fan-shaped flat plate material 30 is placed on the portion 16B and a partial press bending process of a narrow width is performed, the partial arc-shaped press bending process of the start end portion 30A can be performed (see FIG. 4).

DESCRIPTION OF SYMBOLS 10 Portal frame 10A Leg frame part 10B Connection frame part 11 Slide guide 12 Shaft guide 13 Cylinder 13A Rod 14 Press ram 15 Male type 15A Cross-section circular convex part 16 Female type 16A Cross-section concave part 17 Base block 17A Base part 17B Oscillating part 17C Rotating shaft 18A Tilt wedge piece 18B Holding wedge piece 19 Cylinder 20 Rotating shaft 30 Flat plate material 30A Start end

Claims (6)

An end that bends the end of the fan-shaped flat plate material into the end shape of the tapered tube base material by repeating the partial press bending process of the narrow width by the female mold and the male mold on the end of the fan-shaped flat plate material. Press bending machine,
A gate-shaped frame (10) having a U-shape comprising both leg frame portions (10A) and a connecting frame portion (10B) extending between the upper ends of the both leg frame portions (10A);
Left and right slide guides (11) extending along the both leg frame portions (10A);
A pair of left and right shaft guides (12) extending downward from the connecting frame portion (10B) of the portal frame (10);
Left and right cylinders (13) extending downward from the connecting frame portion (10B) of the portal frame (10);
The left and right cylinders (13) are connected to the rods (13A) and include a rotating shaft (20) that is slidable and rotatable between the pair of left and right shaft guides (12). By the simultaneous operation of the rod (13A) of (13), the press operation is performed downward, both sides are slidably contacted with the left and right slide guides (11), and the press operation is guided, and the individual operations of the left and right cylinders (13) are performed. The press ram (14) is rotated around the rotating shaft (20) and can be tilted, and both side portions (14A) form an arc shape, and the sliding contact with the left and right slide guides (11) is maintained in the tilted state. )When,
A male mold (15) attached to the lower surface of the press ram (14) and having a convex arcuate section (15A) in the mold surface;
The mold surface has a cross-section concave portion (16A) opposite to the cross-section arc convex portion (15A) of the mold surface of the male mold (15), and the cross-section concave portion (16A) and the mold of the male mold (15) A female die (16) that performs a partial press bending process of a narrow width with respect to the end of the flat plate material (30) by means of a surface cross-section arc convex portion (15A);
An end press bending apparatus comprising: An end that bends the end of the fan-shaped flat plate material into the end shape of the tapered tube base material by repeating the partial press bending process of the narrow width by the female mold and the male mold on the end of the fan-shaped flat plate material. Press bending machine,
A gate-shaped frame (10) having a U-shape comprising both leg frame portions (10A) and a connecting frame portion (10B) extending between the upper ends of the both leg frame portions (10A);
A cylinder (13) extending downward from the connecting frame portion (10B) of the portal frame (10);
A press ram (14) connected to the rod (13A) of the cylinder (13) and pressed downward by the operation of the rod (13A) of the cylinder (13);
A male mold (15) attached to the lower surface of the press ram (14) and having a convex arcuate section (15A) in the mold surface;
The mold surface has a cross-section concave portion (16A) opposite to the cross-section arc convex portion (15A) of the mold surface of the male mold (15), and the cross-section concave portion (16A) and the mold of the male mold (15) While the end portion of the flat plate material (30) is subjected to a narrow partial press bending process with the arc-shaped convex portion (15A) of the plane cross section, in a direction orthogonal to the concave section (16A) of the mold surface. A female die (16) which is rotatable around an extending rotary shaft (17C);
A weight (17D) for tilting one end side or the other end side of the concave section (16A) of the mold surface of the female mold (16) downward;
A tilting wedge piece (18A) for sliding one end side or the other end side of the female mold (16) around the rotating shaft (17D) against the weight of the weight (17D) by sliding. ,
A cylinder (19) for sliding the tilting wedge piece (18A);
An end press bending apparatus comprising:   The base block (17) of the female mold (16) has the weight (17D) and is rotatable around the rotating shaft (17C). The swinging portion (17B) and the swinging portion (17B) The tilting wedge piece (18A) is inserted between the one end side or the other end side of the female mold (16) and the swinging part (17B) and is slid. Thus, one end side or the other end side of the female mold (16) is tilted around the rotating shaft (17D) against the weight of the weight (17D). End press bending apparatus as described. A holding wedge piece (18B) for positioning and holding the female mold (16) by sliding;
A cylinder (19) for sliding the holding wedge piece (18B);
The end press bending apparatus according to claim 2, comprising: The base block (17) of the female mold (16) has the weight (17D) and is rotatable around the rotating shaft (17C). The swinging portion (17B) and the swinging portion (17B) Consisting of a base (17A) that is rotatably received,
A holding wedge piece (18B) for positioning and holding the female die (16) by sliding, and a cylinder (19) for sliding the holding wedge piece (18B),
The holding wedge piece (18B) is inserted and slid between the other end side or one end side of the female die (16) and the swinging portion (17B), thereby positioning and holding the female die (16). The end press bending apparatus according to claim 2, wherein the end press bending apparatus is provided. A step portion (16B) for mounting a starting end portion (30A) of a fan-shaped flat plate material (30) on the upper end inner edge of the concave section (16A) of the female die (16) and performing a partial press bending process with a narrow width. 3) The end press bending apparatus according to claim 1 or 2.

Images