JP6654839B2 - Press machine - Google Patents

Description

  The present invention relates to a press working machine for separating a product and an unnecessary part by shearing a work, and more particularly to a press working machine capable of separating an unnecessary part into a plurality of pieces.

  As sheet metal products manufactured using a press machine, there are a fender panel, a door panel, and the like that form a body of an automobile. In addition, as a press working process in manufacturing a sheet metal product, there are a drawing process of molding a product shape into a work to be a material, a trimming process of removing the outer periphery of the work as an unnecessary portion, and the like. Unnecessary portions removed in the trimming step, that is, scraps are often long, and handling thereof has been difficult. Therefore, it is known to provide a press cutter with a scrap cutter to divide the scrap into a plurality of pieces. Press working machines having a scrap cutter are described in Patent Documents 1 to 3.

  The press machine described in Patent Literature 1 includes an upper die and a lower die, a punch and a scrap cutter provided in the upper die, a cutting blade provided in the lower die, and a compressed air supply passage provided in the lower die. And In the press machine described in Patent Literature 1, when the upper die is lowered, the ring-shaped scrap trimmed from the molded product by the punch and the lower die is divided into a plurality of pieces by the scrap cutter and the cutting blade. . When the upper mold rises, compressed air is blown out from the supply passage, and the piece is removed from the mold section.

  The press working machine described in Patent Document 2 includes an upper die and a lower die, a sectional die provided on the upper die, a cutting blade block provided on the lower die, a lifter plate provided on the lower die, and a lifter plate. And an air cylinder for tilting. In the press machine described in Patent Literature 2, the upper die is lowered and the scrap (non-product part) at the peripheral edge of the blank material is punched into a frame shape by the shearing action of the cutting blade block and the sectional die, and trimming is performed. Is done. The pieces divided into a plurality of scraps are supported by a lifter plate, and when the upper die rises to a predetermined height, the air cylinder operates to tilt the lifter plate, and the plurality of pieces that have separated the scraps are separated from the lifter plate by the lifter plate. Fall under its own weight.

  The press machine described in Patent Document 3 includes an upper die, a lower die having a discharge port, a punching blade provided on the lower die, a scrap cutter provided on the upper die, and a finger. In the press working machine described in Patent Literature 3, the scrap cutter is configured such that the size of the secondary material punched from the material at the time of press forming is a piece shorter than the punching blade of the lower die. Pieces obtained by cutting the scraps sheared from the secondary material are discharged from the discharge port. The finger has a first suction cup for sucking and holding the press-formed product, and a second suction cup for sucking and holding the secondary material.

Japanese Utility Model Publication No. 60-25321 Japanese Utility Model Laid-Open No. 2-16237 JP-A-4-327329

  However, the press machines described in Patent Literatures 1 to 3 must be provided with a step of removing a piece obtained by dividing a scrap by using a compressed air supply mechanism, an air cylinder, a removing mechanism such as a finger, or an actuator. However, there was a problem that the man-hour increased.

  An object of the present invention is to provide a press machine capable of suppressing an increase in man-hours in removing pieces generated by dividing unnecessary portions.

The present invention provides a first mold and a second mold that are relatively movable, and is provided on each of the first mold and the second mold, and separates a workpiece into unnecessary parts by shearing a workpiece. An annular forming cutter, comprising: a plurality of first scrap cutters provided on the first forming die and arranged at intervals in a circumferential direction of the forming cutter; (2) The unnecessary portion is provided in a molding die and is disposed between the plurality of first scrap cutters in the circumferential direction of the molding cutter, and the unnecessary portion is formed of a plurality of pieces in cooperation with the plurality of first scrap cutters. A plurality of second scrap cutters, and of the plurality of second scrap cutters, contacting the pieces, both ends of which are placed on a set of the second scrap cutters, to apply an elastic force of an elastic member. By A removing mechanism for dropping the piece from the set of second scrap cutters, wherein two of the removing mechanisms are disposed between the pair of second scrap cutters in the circumferential direction of the forming cutter, The two removing mechanisms each include an arm that contacts the piece and is rotatable about a support shaft, and an elastic member that applies an elastic force to the arm, and the elastic member includes the arm Giving an elastic force to the piece through the arm, the arm has a support portion that comes into contact with the piece, and a set of the scrap cutters has three edges at an upper end respectively, and a tip portion of the support portion When the arm is rotated by the elastic force of the elastic member, of the three edges provided at the upper end of the set of second scrap cutters, the three edges are higher than the lowest edge , and , Serial support portion, so as to cause drop slid the piece, inclined to the horizontal plane.

  The first molding die in the present invention is disposed above the second molding die, the first molding die and the second molding die are relatively movable in a vertical direction, and the molding cutter is The first and second forming dies are annular in plan view, and the forming cutter has a product inside a portion where the work is sheared and a unnecessary portion outside the portion where the work is sheared. .

  One set of the second scrap cutter in the present invention is inclined with respect to a direction in which the first and second molding dies relatively move in a side view of the first and second molding dies. The inclined surfaces provided on the pair of second scrap cutters respectively have inclined surfaces, and face each other in a side view of the first mold and the second mold.

  The second scrap cutter and the arm in the present invention support the work before being sheared.

  According to the present invention, the removing mechanism can apply the elastic force of the elastic member to the piece to drop the piece from the set of second scrap cutters. Therefore, an increase in man-hours can be suppressed.

(A) is a schematic plan view showing the lower die of the press machine of the present invention, and (B) is a schematic side view of the press machine. It is a perspective view showing the lower type of the press machine of the present invention. (A), (B) is a partial side view showing the operation of the press machine of the present invention. (A), (B) is a partial side view showing the operation of the press machine of the present invention. (A), (B) is a partial side view showing the operation of the press machine of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. A press machine 10 shown in FIG. 1A cuts a workpiece 11 such as a steel plate along a virtual line S1, specifically, obtains a product 12 by shearing, and does not need to be located outside the virtual line S1. This is a mold for performing a part, that is, a trimming step of removing the scrap 13 and a dividing step of dividing the scrap 13 into a plurality of pieces. In a plan view of the press machine 10, the virtual line S1 is annular. The product 12 includes, but is not particularly limited to, components constituting a vehicle body, such as a hood, a lucky door, a door panel, and a fender. The scrap 13 to be removed is annular.

  The press machine 10 has an upper die 14 and a lower die 15 as shown in FIG. The upper die 14 is disposed vertically above the lower die 15 in the vertical direction, that is, the upper die 14 and the lower die 15 are relatively movable in the vertical direction. The upper mold 14 is supported by a slide via an upper holder. The lower mold 15 is fixed to the bolster via a lower holder.

  A moving mechanism is provided for moving the upper mold 14 in the vertical direction via the slide and the upper holder. The moving mechanism converts a motor and a rotational force of the motor into a lowering force and a rising force of the upper mold 14. And a crank mechanism that performs the operation. Further, the moving mechanism may be a hydraulic cylinder that moves the upper die 14 in the vertical direction. The upper holder is provided with a work fixing pad via a spring.

  The upper die 14 has a plurality of die members arranged in an annular shape along the outer peripheral shape of the work 11. A plurality of first forming cutters 16 for shearing the work 11 are fixed to the upper mold 14. Each of the plurality of first forming cutters 16 has an elongated shape, and each of the plurality of first forming cutters 16 has an edge 16A along the longitudinal direction. In a plan view of the press machine 10, the planar shape of the edge 16A is annular along the outer peripheral shape of the product 12 to be obtained. The plurality of first forming cutters 16 have first edges 18 at both ends in the longitudinal direction, respectively.

  Further, a plurality of first scrap cutters 17 are fixed to the upper mold 14. The plurality of first scrap cutters 17 protrude outside the first forming cutter 16. As shown in FIG. 1A, the plurality of first scrap cutters 17 are arranged at intervals along the outer peripheral shape of the product 12 to be obtained. The first scrap cutter 17 has a second edge 19 and a third edge 20. The second edge 19 is disposed between the first edge 18 and the third edge 20 in a direction in which the first scrap cutter 17 projects laterally from the upper mold 14, that is, in a direction inside and outside the upper mold 14.

  The second edge 19 is located between the first edge 18 and the third edge 20 in the inward and outward directions of the upper die 14. The first edge 18 is disposed inside the second edge 19 in the inward and outward directions of the upper die 14. The first edge 18 is arranged above the second edge 19 and the third edge 20. FIG. 3 shows an example in which the first edge 18 and the second edge 19 are linear.

  The lower mold 15 includes a block 37, a support surface 21 formed on the block 37, an outer peripheral surface 22 provided on the block 37 and continuous with the support surface 21, and a second forming cutter 23 provided on the block 37. And a discharge surface 40 provided around the block 37. The outer peripheral surface 22 is vertical, and the discharge surface 40 is inclined with respect to the horizontal plane. The second molding cutter 23 is annularly arranged along the outer peripheral shape of the product 12 to be obtained. The second forming cutter 23 is an edge located at a boundary between the support surface 21 and the outer peripheral surface 22. The second forming cutter 23 has a shape similar to the first forming cutter 16 in a plan view of the press machine 10. The second forming cutter 23 is arranged inside the first forming cutter 16 in a plan view of the press machine 10.

  A second scrap cutter 24 is fixed to the outer peripheral surface 22 of the lower die 15. The second scrap cutter 24 is made of metal, and a plurality of the second scrap cutters 24 are arranged on the outer peripheral surface 22 at intervals. The number of the first scrap cutters 17 and the number of the second scrap cutters 24 are the same. One first scrap cutter 17 and one second scrap cutter 24 cooperate to shear the scrap 13.

  Fourth edge 25 to sixth edge 27 are provided above second scrap cutter 24. The fifth edge 26 is disposed between the fourth edge 25 and the sixth edge 27 in the inward and outward directions of the lower die 15. The fourth edge 25 is located inside the fifth edge 26 in the inner and outer directions of the lower die 15. The fourth edge 25 is located above the fifth edge 26, and the sixth edge 27 is located below the fifth edge 26. The fourth edge 25 is continuous with the support surface 21 and forms the same plane. The fourth edge 25 is inclined in such a manner that the fourth edge 25 becomes lower as approaching the fifth edge 26. The fourth edge 25 to the sixth edge 27 are all linear, and the fourth edge 25 and the sixth edge 27 have the same inclination angle on the acute angle side with respect to the outer peripheral surface 22 of the lower die 15.

  The second scrap cutter 24 has two side surfaces 28 and 29 parallel to each other. The two side surfaces 28 and 29 are both vertical, and an inclined surface 30 that connects the upper end of the second scrap cutter 24 and the side surface 28 is provided. The maximum height of the side surface 29 is larger than the maximum height of the side surface 28. In a side view of the lower mold 15, the inclined surface 30 is inclined with respect to the side surfaces 28 and 29. Of the plurality of second scrap cutters 24, two adjacent ones in a direction along the outer peripheral shape of the product 12 to be obtained, that is, one set of second scrap cutters 24 have side surfaces 28 facing each other. ing. In one set of second scrap cutters 24, two side surfaces 28 are arranged between two side surfaces 29 in a plan view of the press machine 10. For this reason, the interval between the two inclined surfaces 30 is narrower below the second scrap cutter 24. Thus, in the circumferential direction of the second forming cutter 23, one set of the second scrap cutters 24 is disposed between the two first scrap cutters 17.

  Two removal mechanisms 31 are provided between a pair of second scrap cutters 24 in which the side surfaces 28 are arranged to face each other. That is, one removing mechanism 31 is provided on one side of the set of second scrap cutters 24, respectively. The configuration of the two removing mechanisms 31 is the same.

  The removal mechanism 31 includes a support portion 32 fixed to the side surface 28 of the second scrap cutter 24, an arm 34 rotatably attached to the support portion 32 via a support shaft 33, and a support shaft 33. It has an elastic member 35 for rotating the arm 34 and a stopper 36 for regulating the range of rotation of the arm 34.

  The support portion 32 is fixed to the second scrap cutter 24 by a screw member. The support shaft 33 is disposed between the stopper 36 and the elastic member 35 in the inside and outside directions of the second forming cutter 23. The arm 34 has a support surface 41 that contacts the work 11. The support surface 41 is flat and is provided above the arm 34. The end 42 of the support surface 41 is disposed between the second forming cutter 23 and the elastic member 35 in the inside and outside directions of the second forming cutter 23.

  The elastic member 35 is a compression spring made of metal, contracts by receiving a load in the vertical direction, and generates an upward repulsive force. Therefore, the arm 34 is urged counterclockwise in FIGS. 3 and 4 by the elastic force of the elastic member 35. The arm 34 comes into contact with the stopper and stops.

  Next, a process of punching the workpiece 11 with the press machine 10 to obtain the product 12 will be described. Before the work 11 is placed on the support surface 21 of the lower die 15, the arm 34 pressed by the urging force of the elastic member 35 comes into contact with the stopper 36 and stops as shown in FIG. The state in which the arm 34 comes into contact with the stopper 36 and stops is defined as a standby position of the arm 34. Here, the free end of the stopper 36, more specifically, the end 42 is located above the sixth edge 27 provided at the upper end of the second scrap cutter 24.

  Next, while the work 11 is being placed on the support surface 21, a part of the outer peripheral side of the work 11 comes into contact with the support surface 41 of the arm 34. Therefore, a part of the load of the work 11 is applied to the arm 34 and the elastic member 35 is elastically deformed so as to contract, and the arm 34 rotates counterclockwise in FIG. 3A. That is, the arm 34 moves away from the stopper 36. Then, as shown in FIG. 3B, the arm 34 stops when the work 11 is supported by the support surface 21 and the upper end of the second scrap cutter 24.

  Then, when the upper mold 14 is lowered, the product 12 is punched out by the shearing force applied to the work 11 from the first forming cutter 16 and the second forming cutter 23 as shown in FIGS. In addition, the annular scrap 13 is trimmed. Further, the annular scrap 13 is sheared at a plurality of locations in the circumferential direction by a shearing force applied from the first scrap cutter 17 and the second scrap cutter 24 and separated into a plurality of pieces 38 and 39. After the product 12 is obtained in this way, the upper die 14 moves up and stops at a predetermined position as shown in FIGS. 4 (B) and 5 (B).

  When the scrap 13 is divided into a plurality of pieces 38 and 39, the pieces 38 that are not placed on the set of second scrap cutters 24 fall by their own weight as shown in FIG. The piece 38 that has fallen under its own weight slides on the discharge surface 40 and is discharged from the lower mold 15.

  On the other hand, as shown in FIG. 5A, the piece 39 whose both ends are supported by the set of second scrap cutters 24 whose inclined surfaces 30 face each other may not fall by its own weight. Here, when the scrap 13 is trimmed from the work 11 and the scrap 13 is divided into the piece 38 and the piece 39, the load received by the arm 34 is the load at the time when the arm 34 supports the work 11. Less than.

  Therefore, the arm 34 rotates counterclockwise about the support shaft 33 in FIG. 4 by the elastic force of the elastic member 35. That is, one piece 39 is lifted by the two arms 34, and the arm 34 comes into contact with the stopper 36 and stops as shown in FIG. That is, the arm 34 returns to the standby position. When the arm 34 stops at the standby position, the end 42 is at a position higher than the upper end of the sixth edge 27, and the support surface 41 is inclined with respect to the horizontal plane.

  The support surface 41 is inclined in such a manner that the distance away from the second molding cutter 23 becomes lower. As described above, during the period from when the arm 34 starts rotating counterclockwise to when it stops, the piece 39 is supported on the support surface of the arm 34 as shown in FIGS. 4B and 5B. It slides by its own weight along 41 and falls to the discharge surface 40. That is, the arm 34 functions as a slide.

  In the press machine 10 of the present embodiment, even if a set of second scrap cutters 24 are arranged so that the inclined surfaces 30 face each other, the arm 34 is completed when the process of dividing the scrap 13 into pieces 38 and 39 is completed. Is rotated by the elastic force of the elastic member 35, and the piece 39 falls by its own weight. For this reason, the pieces 39 placed on the set of second scrap cutters 24 arranged so that the inclined surfaces 30 face each other can be dropped from the set of second scrap cutters 24. Therefore, a dedicated process for dropping the piece 39 from the set of second scrap cutters 24 is not required, and an increase in man-hours can be suppressed.

  Further, since the piece 39 is dropped from the set of second scrap cutters 24 by utilizing the repulsive force of the elastic member 35, it is not necessary to provide a dedicated actuator or a power source. When the load applied to the elastic member 35 becomes less than the repulsive force of the elastic member 35, the elastic member 35 is automatically extended, and the arm 34 rotates counterclockwise in FIG. Therefore, the timing for dropping the piece 39 from the set of second scrap cutters 24 need not be controlled.

  Further, when supporting the work 11 on the support surface 21, the elastic member 35 is elastically deformed by receiving a part of the load of the work 11. Therefore, the impact when the work 11 is placed on the support surface 21 can be reduced.

  Explaining the correspondence between the items described in the present embodiment and the configuration of the present invention, the upper mold 14 corresponds to the first mold of the present invention, and the lower mold 15 corresponds to the second mold of the present invention. Correspondingly, the first forming cutter 16 and the second forming cutter 23 correspond to the forming cutter of the present invention, the first scrap cutter 17 corresponds to the first scrap cutter of the present invention, and the second scrap cutter 24 corresponds to The removing mechanism 31 corresponds to the removing mechanism of the present invention, the elastic member 35 corresponds to the elastic member of the present invention, and the inclined surface 30 corresponds to the inclined surface of the present invention. The arm 34 corresponds to the arm of the present invention, the support shaft 33 corresponds to the support shaft of the present invention, the support surface 41 corresponds to the support portion of the present invention, and the upper end of the sixth edge 27 is This corresponds to “the upper end of the second scrap cutter” in the present invention.

  The present invention is not limited to the above embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention. For example, it is also possible to provide two removal mechanisms 31 for one set of second scrap cutters 24, respectively. That is, one removing mechanism 31 is provided on both sides of the side surface 28 and the side surface 29 of the second scrap cutter 24.

  Further, as the elastic member of the present invention, a metal spiral coil spring can be used instead of the metal compression spring. Further, as the elastic member, a rubber-like elastic body or an air spring utilizing the elasticity of compressed air can be used instead of a metal spring. Thus, the elastic member is an element that causes the piece to drop from the second scrap cutter with an elastic restoring force.

  Further, the removing mechanism of the present invention includes one in which the arm is formed of a leaf spring made of metal. The leaf spring is elastically deformed, that is, bent, with the support portion as a fulcrum. By applying the elastic force of the leaf spring to the piece, the piece can be dropped from the second scrap cutter. When the arm is made of a metal leaf spring, the arm also functions as an elastic member, so that the elastic member does not need to be provided exclusively. As described above, the removing mechanism includes a structure in which the arm itself operates by elastic deformation and a structure in which the arm operates around the support shaft. In addition, the support portion provided on the arm may have unevenness in addition to a flat surface and a curved surface. Further, the support portion may be either a structure that makes point contact with the piece or a structure that makes surface contact.

  Further, the press working machine of the present invention includes a machine for trimming an annular scrap along an entire outer peripheral portion of a product and a machine for trimming a long scrap from a part of an outer peripheral portion of a product. In addition, the press machine of the present invention includes a press machine that trims an annular scrap along an outer peripheral portion of a product, trims a scrap from the inside of an annular product, and cuts the scrap into a plurality of pieces. Including.

  Further, the press machine of the present invention has a structure in which both the first and second molding dies can move in the vertical direction, or the second and third molding dies can move in the vertical direction. But does not move vertically.

  Further, the process of shearing the workpiece to obtain a product and dividing the scrap by the press working machine described in the embodiment can be understood as a press working method. In other words, the press working machines described in each claim can be replaced with a press working method.

DESCRIPTION OF SYMBOLS 10 Press machine 11 Work 12 Product 13 Scrap 14 Upper die 15 Lower die 16 1st shaping cutter 17 1st scrap cutter 18 1st edge 19 2nd edge 20 3rd edge 21, 41 Support surface 22 Outer peripheral surface 23 2nd shaping Cutter 24 second scrap cutter 25 fourth edge 26 fifth edge 27 sixth edge 28, 29 side surface 30 inclined surface 31 removing mechanism 32 support section 33 support shaft 34 arm 35 elastic member 36 stopper 37 block 38, 39 piece 40 discharge surface 42 End S1 Virtual line

Claims (4)

A first mold and a second mold that are relatively movable, and an annular molding cutter that is provided in the first mold and the second mold, respectively, and that separates the workpiece into unnecessary parts by shearing the work. And a press machine having:
A plurality of first scrap cutters provided in the first molding die and arranged at intervals in a circumferential direction of the molding cutter;
The plurality of unnecessary portions are provided on the second molding die, and are disposed between the plurality of first scrap cutters in the circumferential direction of the molding cutter, and cooperate with the plurality of first scrap cutters. A plurality of second scrap cutters that divide into pieces of
Of the plurality of second scrap cutters, the pieces are brought into contact with the pieces, both ends of which are placed on one set of the second scrap cutters, to apply the elastic force of an elastic member, thereby allowing the pieces to form one set of the second scrap cutters. (2) a removing mechanism for dropping from the scrap cutter;
Has,
Two of the removing mechanisms are disposed between a pair of the second scrap cutters in a circumferential direction of the forming cutter,
The two removal mechanisms are:
An arm that contacts the piece and is rotatable about a support shaft;
An elastic member that applies elastic force to the arm;
Respectively,
The elastic member provides an elastic force to the piece via the arm,
The arm has a support portion that contacts the piece,
The set of scrap cutters each has three edges at the upper end,
When the arm is rotated by the elastic force of the elastic member, the tip of the support portion is the lowermost edge of the three edges provided at the upper end of the set of second scrap cutters. Press machine , wherein the support portion is inclined with respect to a horizontal plane so as to slide and drop the piece. The press working machine according to claim 1,
The first mold is disposed above the second mold,
The first mold and the second mold are relatively movable in a vertical direction,
The molding cutter is annular in plan view of the first molding die and the second molding die,
The press cutter, wherein the forming cutter uses a product inside a portion where the work is sheared as a product, and uses the outside of a portion where the work is sheared as the unnecessary portion. The press working machine according to claim 2,
One set of the second scrap cutter has an inclined surface that is inclined with respect to a direction in which the first molding die and the second molding die relatively move in a side view of the first molding die and the second molding die. Prepare each,
Inclined surfaces provided respectively on the pair of the second scrap cutter, that have to face each other in a side view of the first mold and the second mold, the press machine. The press machine according to any one of claims 1 to 3 ,
A set of the second scrap cutter and the arms, it supports the workpiece before being sheared, the press machine.

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