JP6557169B2 - Deep drawing body opening edge shape correction device - Google Patents

Description

  The present invention relates to an open end of a deep drawn body that is corrected by pressing inward the open end of a metal deep drawn body that has been press-formed so as to have a polygonal peripheral wall including a plurality of flat side walls. The present invention relates to a part shape correcting device.

  When a deep drawn body having a flat side wall on at least a part of the peripheral wall is formed by pressing a metal plate, generally, the open end of the deep drawn body tends to spread outward at the flat side wall portion. Therefore, it is necessary to correct the opening end portion of the deep drawing body by pressing it inward, and in the devices disclosed in Patent Literature 1, Patent Literature 2 and Patent Literature 3, the opening end portion of the deep drawing body using a cam slider mechanism. Is pressed inward.

Japanese Patent Laid-Open No. 07-080551 JP 09-239444 A JP 2004-337900 A

  However, when the cam slider mechanism is used as disclosed in Patent Document 1, Patent Document 2, and Patent Document 3, there is a problem that the apparatus becomes large, and there is no particular problem if it is a single press. In the transfer press, it is necessary to set a wide space between the processes before and after the correction process, resulting in a waste of space.

  The present invention has been made in view of such circumstances, and it is possible to correct the opening end portion of the deep drawing body with a compact mechanism, and the opening end portion of the deep drawing body that can be incorporated into the transfer press without space waste. An object is to provide a shape correction device.

  In order to achieve the above-mentioned object, the present invention presses the opening end of a metal deep-drawn body that is press-formed to have a polygonal peripheral wall including a plurality of flat side walls inward. A device for correcting the shape of an open end of a deep drawing body to be corrected, which is disposed on the base so as to support a fixed base and the deep drawing body in a posture with the opening end facing downward. The lower die, the upper die that can be moved up and down above the lower die while allowing the deep drawn body to be held in cooperation with the lower die, and the upper die lowered to a predetermined position. In addition, a floating support base that surrounds the lower mold and is floatingly supported by the base, and a plurality of supporting bases that are supported by the floating support base with axes parallel to the flat side walls of the deep drawing body. And individually arranged corresponding to the plurality of flat plate-like side walls and A plurality of movable pieces that are rotatably supported by the support shaft, and the movable pieces on the side that presses the opening end of the deep drawing body inward as the floating support is pushed down by the upper mold. And a driver whose upper end is in contact with the lower surface of the movable piece while penetrating the floating support base and extending up and down at a portion corresponding to the movable piece. A first feature is that a lower end portion of the driver penetrating the base is fixed to the base.

  In addition to the configuration of the first feature, the present invention provides the support shaft on the outer surface of the other end of the movable piece having a pressing portion at one end that can press the opening end of the deep drawing body inward. A back-up block having a support surface that is recessed in an arc shape so as to slidably support the supported surface is fixed to the floating support base. This is the second feature.

  According to the first feature of the present invention, the movable piece that is rotationally driven by the driver pushes the opening end of the deep drawing body inward, and the driver extends vertically and is fixed to the base. Therefore, compared to a conventional cam slider mechanism, a moving member that moves in the horizontal direction and a member that supports the moving member are not required, making it possible to reduce the size in the horizontal direction. It becomes possible to incorporate without waste of space.

  According to the second feature of the present invention, it is possible to receive a load applied to the movable piece on the support surface of the backup block and contribute to improving the durability of the support shaft so that an excessive load is not applied to the support shaft. Can do.

It is a longitudinal cross-sectional view which shows the opening edge part shape correction apparatus of the deep drawing body in the middle of the upper mold | type fall, Comprising: It is sectional drawing which follows the 1-1 line | wire of FIG. It is the top view seen from the arrow 2 direction of FIG. It is a longitudinal cross-sectional view corresponding to FIG. 1 in a state where the upper mold is lowered to a predetermined position.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. First, in FIGS. 1 and 2, a metal deep drawn body 5 includes a plurality of, for example, four flat side walls 6 a, The deep-drawn body 5 is formed by press forming through a plurality of steps of transfer press so as to have a peripheral wall 6 having a polygonal cross-section (in this embodiment, a quadrangle) including 6b, 6c, and 6d. In order to press and correct the opening end 5a inward, an opening end shape correcting device according to the present invention is disposed in the middle of the transfer press.

  By the way, the opening end shape correcting device is configured such that portions corresponding to the four flat side walls 6a to 6d of the deep drawn body 6 have the same structure. The structure of the portion corresponding to one flat side wall 6a will be described in detail, and the portions corresponding to the other flat side walls 6b, 6c, 6d will be denoted by the same reference numerals as the portions corresponding to the flat side wall 6a. The detailed description will be omitted.

  The open end shape correcting device includes a fixed base 7 and a lower mold 8 disposed on the base 7 so as to support the deep drawn body 5 with the open end facing downward from the inside. And the upper die 9 that can be lifted and lowered above the lower die 8 while allowing the deep drawn body 5 to be held in cooperation with the lower die 8 and the upper die 9 lowered to a predetermined position. The floating support 10 has an axis parallel to the flat side wall 6a of the deep drawing body 5 and the floating support 10 which is supported by the base 7 so as to surround the lower mold 8 while being 10, a support shaft 11 supported by 10, a movable piece 12 which is arranged corresponding to a position corresponding to the flat side wall 6 a and is rotatably supported by the support shaft 11, and the floating support base 10. When the upper die 9 is pushed down, the deep drawing body 5 has an open end 5a inside. And a driver 13 which enables the while being the upper end to the lower surface of the float support 10 extend through the movable piece 12 in that the movable piece 12 on the side of the press for driving rotation is abutting.

  The base 7 is formed so as to have a lower mold support portion 7a that has a square cross-sectional shape and is raised at the center, and the lower mold 8 includes a plurality of lower mold support portions 7a on the lower mold support portion 7a. A base lower mold 15 fixed by a bolt 14 and a movable lower mold 16 disposed above the base lower mold 15 so as to be capable of displacement in a range limited in the vertical direction with respect to the base lower mold 15. The lower die 8 provided with the base lower die 15 and the movable lower die 16 in contact with each other comes into contact with the inner surface of the deep drawn body 5 with the opening end facing downward, and the deep drawn body 5 can be supported from the inside.

  At the lower end portion of the connecting rod 17 inserted through a plurality of locations of the lower mold support portion 7a and the base lower mold 15 so as to be movable in the axial direction, a flange portion 17a capable of coming into contact with the base lower mold 15 from below is provided. Then, a screw shaft portion 17 b provided at the upper end portion of the connecting rod 17 is screwed into the movable lower mold 16. In addition, coil-shaped first springs 18 are contracted at a plurality of locations between the lower mold support portion 7 a and the movable lower mold 16 of the base 7, and the movable lower mold 16 includes the first spring 18. A rod-shaped spring guide 19 inserted in the upper part is fixed. That is, the movable lower mold 16 above the base lower mold 15 is urged in a direction away from the base lower mold 15 and displaced upward, and is floatingly supported by the lower mold support portion 7a. The upper limit of the movement of 16 with respect to the lower base mold 15 is restricted by the flange portion 17 a coming into contact with the lower surface of the lower base mold 15.

  The upper die 9 is suspended from the base upper die 20 so that the upper die 20 is connected to a hydraulic ram (not shown) and the upper die 20 can be displaced in a vertically limited range with respect to the base upper die 20. A pad 21 to be supported, and the pad 21 abuts on the outer surface of the deep drawing body 5 in an attitude with the opening end facing downward, and holds the deep drawing body 5 in cooperation with the lower mold 8. Is possible.

  The upper part of the first guide rod 22 whose lower ends are fixed to a plurality of locations of the pad 21 is slidably supported by the base upper mold 20, and the vertical relative movement of the pad 21 with respect to the base upper mold 20 is described above. Guided by the first guide rod 22. In addition, at the upper end portion of the suspension rod 23 inserted through a plurality of locations on the base upper mold 20 so as to be movable in the axial direction, a flange portion 23a that comes into contact with the base upper mold 20 from above is provided. A screw shaft portion 23 b provided at the lower end of the pad is screwed into the pad 21. That is, the pad 21 is configured such that the lower limit of movement with respect to the base upper mold 20 is restricted by the flange 23a coming into contact with the base upper mold 20 from above as shown in FIG. The base upper mold 20 is suspended and supported.

  Upper portions of the four second guide rods 24 whose lower ends are fixed to the base 7 are slidably fitted to the base upper die 20 of the upper die 9, and the upper die 9 is 2 Ascend and descend as guided by the guide rod 24.

  The floating support 10 is formed in a quadrangular shape so as to surround the base lower mold 15 of the lower mold 8 and the lower mold support 7 a of the base 7. A holding plate 25 surrounding the lower mold support portion 7a is fixed to the base 7 below the floating support base 10, and the floating plate 10 and the holding plate 25 are provided with a plurality of floating plates. A coil-shaped second spring 26 that biases the support base 10 upward is contracted. In other words, the floating support base 10 is floatingly supported via the second spring 26 on the pressing plate 25 fixed to the base 7.

  Incidentally, rod-shaped receiving members 27 extending upward from the floating support table 10 are fastened by bolts 28 at a plurality of locations on the floating support table 10, and the receiving member is attached to the base upper mold 20 of the upper mold 9. An abutment protrusion 29 that can abut on the upper end portion of 27 is integrally formed. Therefore, as shown in FIG. 3, when the upper die 9 is lowered to a predetermined position, the abutting projection 29 abuts against the upper end of the receiving member 27 and exerts a downward pressing force, thereby supporting the floating support. The base 10 is pushed down against the spring force of the second spring 26.

  On the floating support 10, a pair of brackets 30 corresponding to the flat side walls 6 a of the deep drawing body 5 held by the lower mold 8 and the upper mold 9 are spaced from each other. A pair of bolts 31 are fixed to each other, and the support shaft 11 is supported by each of the brackets 30, and both longitudinal end portions of the movable piece 12 extending long along the flat plate-like side wall 6 a are connected to the support shaft. 11 is rotatably supported.

  At one end portion of the movable piece 12, a pressing portion 32 capable of pressing the opening end portion 5a of the deep drawn body 5 inward is formed, and on the upper outer surface of the base lower die 15 in the lower die 8, A receiving surface 33 corresponding to the inner shape of the open end 5a of the deep drawn body 5 having a desired final shape is formed, and the open end 5a of the deep drawn body 5 is pressed against the receiving surface 33 by the pressing portion 32. It is done.

  An arc-shaped supported surface 34 centered on the axis of the support shaft 11 is formed on the outer surface of the other end portion of the movable piece 12, and the supported surface 34 is slidably supported so as to be circular. A backup block 36 having a support surface 35 that is recessed in an arc shape is fixed to the floating support base 10 by a plurality of bolts 37, for example.

  The driver 13 has a rectangular cross section that is long along the longitudinal direction of the movable piece 12 and extends in the vertical direction. The lower end portion of the driver 13 is a flange portion provided at the lower end portion thereof. 13 a is fixed to the base 7 so as to be sandwiched between the pressing plate 25 and the base 7. Moreover, the driver 13 penetrates the floating support base 10, and the upper end of the driver 13 abuts the lower surface of the movable piece 12 between the support shaft 11 and the pressing portion 32. Therefore, when the floating support base 10 is pushed downward by lowering the upper mold 9 to a predetermined position, the movable piece 12 is moved around the axis of the support shaft by the driver 13 fixed to the base 7. 1 and 3 is rotated in the counterclockwise direction, whereby the pressing portion of the movable piece 12 presses the opening end portion 5a of the deep drawing member 5 toward the inner receiving surface 33.

  Further, when the upper die 9 is lowered to the predetermined position, the movable piece 12 is interposed between the support shaft 11 and the pressing portion 32 as shown in FIG. A damper 39 having an abutment rod 38 that abuts on the upper surface of the movable piece 12 is disposed, and the sudden turning operation of the movable piece 12 by the driver 13 is buffered by the damper 39.

  Next, the operation of this embodiment will be described. In cooperation with the lower die 8 disposed on the base 7 so as to support the deep drawing body 5 with the opening end facing downward from the inside, the depth is reduced. The upper die 9 that can hold the diaphragm 5 can be moved up and down above the lower die 8, and a floating support base 10 that is pushed down by the upper die 9 lowered to a predetermined position floats on the base 7 around the lower die 8. A support shaft 11 that is supported and has an axis parallel to the flat plate-like side walls 6a to 6d of the deep drawn body 5 is supported by the floating support base 10, and is arranged corresponding to the flat plate-like side walls 6a to 6d individually. In addition, a plurality of movable pieces 12 that are rotatably supported by the support shaft 11 press the opening end portion 5a of the deep drawing body 5 inward in response to depression by the upper mold 9 of the floating support base 10. The driver 13 is driven to rotate, and the driver 13 is movable. Since the upper end of the driver 13 fixed to the base 7 is brought into contact with the lower surface of the movable piece 12, the conventional cam slider mechanism is used. Compared to the conventional one, a moving member that moves in the horizontal direction and a member that supports the moving member are unnecessary, and it is possible to reduce the size in the horizontal direction, and it can be incorporated into the transfer press without waste of space. .

  Further, an arc-shaped supported surface centering on the axis of the support shaft 11 is formed on the outer surface of the other end of the movable piece 12 having a pressing portion 32 capable of pressing the opening end portion 5a of the deep drawing body 5 inward. 34 is formed, and the backup block 36 having the support surface 35 that is recessed in an arc shape so as to slidably support the supported surface 34 is fixed to the floating support base 10. The load applied to the movable piece 12 can be received at 35, and it is possible to contribute to improving the durability of the support shaft 11 so that an excessive load is not applied to the support shaft 11.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

5 ... Deep drawn body 5a ... Open end 6 of deep drawn body 6 ... Peripheral walls 6a, 6b, 6c, 6d ... Flat side wall 7 ... Base 8 ... Lower mold 9 ··· Upper mold 10 ··· Floating support 11 ··· Support shaft 12 · Movable piece 13 · · · Driver 32 · · · Pressing portion 34 · · · Supported surface 35 · · · Support surface 36 ···・ Backup block

Claims (2)

  Open end (5a) of metal deep-drawn body (5) formed by pressing so as to have a polygonal peripheral wall (6) including a plurality of flat side walls (6a, 6b, 6c, 6d) A device for correcting the shape of the open end of a deep drawn body that presses the inside toward the inside and supports the fixed base (7) and the deep drawn body (5) in a posture with the open end facing downward. Thus, the lower mold (8) disposed on the base (7) and the deep drawn body (5) can be held in cooperation with the lower mold (8). The base (7) surrounds the lower mold (8) while being pushed down by the upper mold (9) which can be raised and lowered above the lower mold (8) and the upper mold (9) lowered to a predetermined position. And a shaft parallel to the plurality of flat side walls (6a to 6d) of the deep drawing body (5). And a plurality of support shafts (11) supported by the floating support base (10) and a plurality of the plate-like side walls (6a to 6d), respectively, and the support shafts (11 ) And a plurality of movable pieces (12) that are rotatably supported by the upper die (9) and the open end of the deep drawing body (5) as the floating support (10) is pushed down by the upper mold (9). (5a) The upper end abuts on the lower surface of the movable piece (12) through the floating support base (10) while allowing the movable piece (12) to be rotationally driven to the side pressing the inner side (5a). A lower end of the driver (13) that extends vertically at a portion corresponding to the movable piece (12) and penetrates the floating support base (10). A device for correcting the shape of the open end of a deep-drawn body, which is fixed to   On the outer surface of the other end portion of the movable piece (12) having a pressing portion (32) capable of pressing the opening end portion (5a) of the deep drawn body (5) inward, the support shaft (11) A backup block having a support surface (35) which is formed in an arcuate shape and is supported in a circular arc shape so as to slidably support the supported surface (34). The deep-drawn body open end shape correcting device according to claim 1, wherein (36) is fixed to the floating support base (10).

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