JP2013166152A - Press work method and press die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press work method capable of efficiently forming a flange in a simple structure and an simple operation and being excellent on workability such as carrying-in and carrying-out of a panel, and a press die.SOLUTION: The press work method including a lower die punch 2 arranged on a lower die, a flange blade 21 arranged on an upper die and having a top end face and an internal hole, and a preceding blade 31 having a groove section 37, and a top section 38 facing the internal hole by having a gap. The groove section 37 of the preceding blade 31 descending according to descending of the upper die is opposite to an end edge Da of a protruded section D formed on the panel P mounted on the lower die punch 2, the end edge Da of the protruded section D is engaged with the groove section 37 by making the top end face of the descending flange blade 21 push down the protruded section D, and a flange F is formed by making the protruded section D draw between a flange forming surface of the flange blade 21 and the top 36 of the preceding blade.

Description

  The present invention relates to a press working method and a press die, and more particularly to a press working method and a press die for forming a flange.

  For example, as shown in the perspective view of FIG. 9, the panel P in which the cylindrical flange F protrudes from the base part B is made by pressing a thin steel plate.

  An example of a press die for forming the panel P from which the cylindrical flange F protrudes from the base portion B will be described with reference to FIG.

  As schematically shown in FIG. 10A, the press die 100 has a lower die 101 and an upper die (not shown) that moves up and down to face the lower die 101. The lower die 101 is formed with a cylindrical punch guide hole 102a, a lower die punch 102, a cam slide 113 having cam surfaces 113a and 113b supported below the lower die punch 102 so as to be horizontally movable, and a circular shape. A columnar top portion 114a is fitted in the punch guide hole 102a so as to be movable up and down, and includes a punch 114 formed with a cam surface 114b slidably contacting the cam surface 113b of the cam slide 113. Further, the cam slide 113 and the punch 114 have a biasing means such as a cam return spring that biases the cam slide 113 and the punch 114 to the retracted position, that is, the position shown in FIG.

  On the other hand, the upper die is provided with a cam driver 115 having a cam surface 115a that can be slidably opposed to the cam surface 113a of the cam slide 113, and the upper die is provided with an upper die pad 116 via an elastic member. The upper die pad 116 is formed with a cylindrical punch hole 116a into which the top 114a of the punch 114 can be fitted with a gap.

  In the press working, as shown in FIG. 10A, at the top dead center position where the upper mold is separated from the lower mold 101, a hole C is formed on the lower mold punch 102 corresponding to the portion where the flange F is formed. Loading and setting the panel P as the raw material.

  Then, the upper mold is lowered from the top dead center. As the upper die is lowered, the upper pad 116 supported by the upper die presses the base portion B of the panel P against the lower die punch 102 as shown in FIG. When the upper die is further lowered, the cam surface 115a of the cam driver 115 abuts on the cam surface 113a of the cam slide 113 to push the cam slide 113 in the direction of the arrow, and the cam surface 113b of the moving cam slide 113 is the cam of the punch 114. The punch 114 is pushed upward while being pressed against the surface 114b. The cylindrical flange F is formed by pushing the periphery of the hole C formed in the base portion B into the punch hole 116a of the upper die pad 116 by raising the punch 114.

  After that, the upper mold is raised. The cam slide 113 and the punch 114 released from being pressed by the cam driver 115 ascending as the upper die is raised are returned to the retracted position by the biasing means, and the punch 114 is retracted from the flange F and the upper die pad 116 is raised. To do. And the panel P in which the flange F was shape | molded is carried out from the metal mold | die 100. FIG.

  Various types of press devices for forming a flange on a panel by operating a punch for a cam mechanism constituted by a cam driver, a cam slide, and the like have been proposed, for example, in Japanese Patent Application Laid-Open No. H10-228707.

JP 60-166125 A

  However, the cam mechanism configured by the cam driver, cam slide, punch, etc. for operating the punch is complicated in structure and operation, is formed in a relatively large size, and is mainly disposed near the outer periphery of the lower mold and the upper mold. For this reason, there is a concern that it will hinder the smooth loading and unloading of the panel to the mold, particularly the operation of loading and unloading the panel from the horizontal direction. Further, the operating space of this cam mechanism, that is, the occupied space is relatively large, and the installation position and the number of arrangements of punches are limited.

  Accordingly, an object of the present invention made in view of such a point is to provide a press working method and a press die which are capable of efficiently forming a flange with a simple configuration and operation and excellent in workability such as carrying in and out of a panel. There is to do.

  The press working method according to the invention described in claim 1, which achieves the above object, comprises a lower die punch provided in a lower die and a flange blade and a leading blade provided in an upper die which are arranged opposite to the lower die and move up and down. A pressing method for forming a flange with the flange blade and the leading blade by lowering the upper die on a panel placed on the top surface of the lower die punch, wherein the flange blade A top end surface facing the top surface and a flange forming surface extending continuously in the same direction as the vertical movement direction of the upper mold through the corner portion on the top end surface, and the leading blade includes the groove portion and the groove portion. A panel in which a groove portion of a leading blade that is formed continuously and is opposed to the flange forming surface with a gap and descends as the upper die descends is placed on the top surface of the lower die punch Facing the edge of the ridge formed on the The top end surface of the lunge blade pushes down the raised portion, and the edge of the raised portion is locked to the groove portion, and the raised portion is formed between the flange forming surface of the flange blade and the top portion of the leading blade to form a flange. It is characterized by.

  According to this, a flange blade having a top end surface and a flange forming surface, a groove portion and a leading blade having a top portion are provided, and the groove portion of the leading blade that descends as the upper die is lowered is placed on the top surface of the lower die punch. The top end surface of the flange blade that faces the edge of the raised portion formed on the formed panel and descends pushes down the raised portion, and the edge of the raised portion engages with the groove and the raised portion is the flange blade. Since the narrowed flange is formed between the flange forming surface and the top of the leading blade, an operation mechanism such as a cam mechanism is not required, and the flange can be formed efficiently with a simple configuration and operation. Further, since it is configured compactly without an operating mechanism such as a cam mechanism, it is possible to easily secure the degree of freedom of the installation position and the number of installation without being limited to the installation of the flange blade and the leading blade. Furthermore, it is excellent in the carrying-in workability of the panel used as a raw material and a panel.

  The press die according to the invention described in claim 2 which achieves the above object comprises a lower die punch provided in the lower die and a flange blade and a leading blade provided in the upper die which are arranged opposite to the lower die and move up and down. A press mold for forming a flange with the flange blade and the leading blade by lowering the upper die on a panel placed on the top surface of the lower die punch, wherein the flange blade is formed of the lower die punch. A top end surface facing the top surface and a flange forming surface extending continuously in the same direction as the vertical movement direction of the upper mold through the corner portion on the top end surface, and the leading blade includes the groove portion and the groove portion. A panel in which a groove portion of a leading blade that is formed continuously and is opposed to the flange forming surface with a gap and descends as the upper die descends is placed on the top surface of the lower die punch A flange that faces the edge of the ridge formed on The top end surface of the blade pushes down the raised portion, the edge of the raised portion is locked to the groove portion, and the raised portion is formed between the flange forming surface of the flange blade and the top portion of the preceding blade. And

  According to this, it is constituted by a leading blade having a flange blade and a groove portion, and the groove portion of the leading blade which descends as the upper die descends is formed on the panel formed on the top surface of the lower die punch. The top end surface of the flange blade that faces the edge and descends pushes down the raised portion, and the edge of the raised portion engages with the groove, and the raised portion is connected to the flange forming surface of the flange blade and the top of the leading blade. Since the squeezing flange is formed between the two, the operation mechanism such as a cam mechanism is unnecessary, and the flange can be efficiently formed with a simple configuration and operation. Further, since it is configured compactly without an operating mechanism such as a cam mechanism, it is possible to easily secure the degree of freedom of the installation position and the number of installation without being limited to the installation of the flange blade and the leading blade. In addition, there is no component on the top surface of the lower die pad and the workability of carrying in and out the panel is excellent.

  According to a third aspect of the present invention, in the press die of the second aspect, the flange forming surface is a cylindrical inner hole formed in a flange blade, the groove portion is an annular groove shape, and the top portion is the inner portion. It is a cylindrical shape that can be opposed to a hole and a gap, and a groove portion of a leading blade that descends as the upper die descends is formed on the raised portion of the panel placed on the top surface of the lower die punch The top end surface of the flange blade that enters the hole and faces the edge of the raised portion and descends pushes down the raised portion so that the edge of the raised portion is locked in the groove portion, and the raised portion is placed inside the flange blade. A narrowed cylindrical flange is formed between the hole and the top of the leading blade.

  According to this, the flange forming surface formed on the flange blade is a cylindrical inner hole, the groove formed on the leading blade is an annular groove, and the top is a cylindrical shape that can be opposed to the inner hole with a gap. By doing so, a cylindrical flange can be press-molded on the panel.

  According to a fourth aspect of the present invention, in the press die of the second aspect, the flange forming surface is a flat shape extending in the same direction as the vertical movement direction of the upper die, and the groove portion is the flange forming surface. And the top portion can be opposed to the flange forming surface with a gap, and the groove portion of the leading blade that descends as the upper die descends is the top of the lower die punch. The top end surface of the flange blade which is opposed to the edge of the raised portion formed on the panel placed on the surface and descends pushes down the raised portion, and the edge of the raised portion is locked to the groove portion and A squeezed flange is formed between the flange forming surface of the flange blade and the top of the preceding blade.

  According to this, the flange forming surface formed on the flange blade is a flat shape, the groove portion is a concave groove shape extending facing the flange forming surface, and the top portion is opposed to the flange surface with a gap. Thus, a flange can be formed at the edge of the panel.

  The present invention includes a flange blade having a top end surface and a flange forming surface, a groove portion, and a leading blade having a top portion, and the groove portion of the preceding blade that descends as the upper die is lowered is placed on the top surface of the lower die punch. The top end surface of the flange blade that is opposed to the edge of the raised portion formed on the formed panel pushes down the raised portion, and the edge of the raised portion is locked to the groove portion, and the raised portion is fixed to the flange blade. Since the narrowed flange is formed between the flange forming surface and the top of the leading blade, an operation mechanism such as a cam mechanism is unnecessary, and the flange can be formed efficiently with a simple configuration and operation. Further, since it is configured compactly without an operating mechanism such as a cam mechanism, it is possible to easily secure the degree of freedom of the installation position and the number of installation without being limited to the installation of the flange blade and the leading blade.

It is sectional drawing which shows typically the structure of the press die in 1st Embodiment. It is the A section enlarged view of FIG. Similarly, it is an operation explanatory view. Similarly, it is an operation explanatory view. Similarly, it is an operation explanatory view. Similarly, it is an operation explanatory view. Similarly, it is an operation explanatory view. It is operation | movement explanatory drawing which shows the principal part of the press die in 2nd Embodiment. It is explanatory drawing of a press-formed product. It is explanatory drawing of the conventional press metal mold | die.

  Embodiments of a press working method and a press die according to the present invention will be described below with reference to the drawings.

(First embodiment)
The first embodiment of the present invention will be described with reference to FIGS. 1 to 7 by taking as an example a case where a panel P in which a cylindrical flange F protrudes upward from the base portion B shown in FIG. 9 is formed.

  1 is a cross-sectional view schematically showing a configuration of a press die 1, FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIGS. 3 to 7 are operation explanatory views.

  As shown in FIGS. 1 and 2, the press die 1 has a lower die punch 2 arranged in a lower die (not shown), and the top surface 3 of the lower die punch 2 is formed on a base portion B of a panel P as a material. It is formed in the shape of a copied plane.

  On the other hand, an upper die pad 7 is provided on the lower surface of the upper die 5 that moves up and down between the top dead center and the bottom dead center so as to face the lower die and the lower punch 2 with a plurality of elastic members 6 interposed. A bottomed cylindrical upper mold holding hole 10 is formed in the top part 8 of the upper mold pad 7 facing the lower mold punch 2 so as to open to the top part 8 along a reference line L extending vertically. The upper die holding hole 10 has a cylindrical flange blade holding hole 11 having an opening at the top portion 8, a stepped portion 12 formed in an annular shape, a punch holding hole 13 having a smaller diameter than the flange blade holding hole 11, and a biasing means holding. A hole 14 is continuously formed in a cylindrical shape on the same axis and has a bottom 15.

  A cylindrical flange blade 21 and a punch 31 are mounted in the upper mold holding hole 10. The flange blade 21 is a cylinder in which an outer periphery 22 is fitted into the flange blade holding hole 11, a base end surface 23 is in contact with the step portion 12, and a top end surface 24 facing the top surface 3 of the lower die punch 2 protrudes from the top portion 8. The corner portion 26 in which the cylindrical inner hole 25 and the top end surface 24 which become flange forming surfaces and extend in the same direction as the vertical movement direction of the upper die are chamfered in a circular arc shape.

  The punch 31 is a columnar shape in which the shank 32 is slidably fitted to the cylindrical sleeve 16 mounted in the upper punch holding hole 13, and protrudes from the top end 33 of the flat annular shank 32 so as to be a flange blade. 21 has a substantially cylindrical leading blade 35 through which the top end 39 protrudes through the inner hole 25 of 21. As shown in FIG. 2, the leading blade 35 has a cylindrical base portion 36, which is slidably fitted into the inner hole 25 of the flange blade 21 in order from the shank 32 side, an annular groove-shaped groove portion 37, and a smaller diameter than the inner hole 25. And has a cylindrical top portion 38 and a flat top end 39 that pass through the inner hole 25 so as to face each other.

  As shown in FIG. 2, the groove portion 37 is continuous with the tip of the base portion 36 and gradually decreases in diameter as the distance from the base portion 36 toward the top end 39 becomes a conical tapered surface 37a, and an annular bottom surface 37b continuous with the tapered surface 37a. In addition, it has a conical shoulder portion 37c that gradually becomes larger in diameter as it moves from the bottom surface 37b to the top portion 38 side.

  The leading blade 35 protrudes from the flange blade 21 into the biasing means holding hole 14 and the top end 33 of the shank 32 presses and biases to the protruding position where it abuts the base end surface 23 of the flange blade 21. Means, in this embodiment, a cylindrical elastic member 40 that is elastically mounted between the bottom 15 and the shank 31 is provided. The shoulder portion 37c of the groove portion 37 formed in the leading blade 35 protrudes from the top end surface 24 of the flange blade 21 at the protruding position where the top end 33 of the shank 32 is pressed against the base end surface 23 of the flange blade 21 by being pressed by the elastic member 40. It will be in the state.

  On the other hand, as shown in FIG. 2, the panel P that is a material is formed with a bulge portion D that bulges in advance in a dome shape at a portion that forms a cylindrical flange F that protrudes upward from a flat base portion B. A circular hole E into which the top portion 38 of the leading blade 35 can be inserted opens at the top portion of the raised portion D. By forming this hole E, an annular edge Da is formed in the raised portion D. Further, the height h of the raised portion D has a length reaching from the top end 39 of the leading blade 35 into the groove portion 37.

  Next, the operation of the press die 1 will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the upper die 5 is held at a top dead center separated upward from the lower die punch 2 provided on the lower die. At this time, the punch 31 is pressed and urged by the elastic member 39 so that the top end 33 of the shank 32 abuts on the base end surface 23 of the flange blade 21 and the leading blade 35 is held at the protruding position protruding from the inner hole 25 of the flange blade 21. Is done.

  With the upper die 5 held at the top dead center position, a panel P as a material is carried on the top surface 3 of the lower die punch 2, and the base portion B is placed on the top surface 3 of the lower die punch 2. The panel P is placed at a processing position where the center of the hole E is on the reference line L.

  With the base B placed on the top surface 3 of the lower die punch 2 and the panel P set, the upper die 5 is lowered from the top dead center toward the lower die. As the upper die 5 is lowered, the upper die pad 7 is lowered together with the upper die 5, and the top portion 38 of the leading blade 35 protruding from the inner hole 25 of the flange blade 21 is located in the hole E of the panel P as shown in FIG. Enter. Further, the upper die 5 is lowered and the top end 39 of the leading blade 35 comes into contact with the top surface 3 of the lower die punch 2 as shown in FIG. In a state where the top end 39 of the leading blade 35 is in contact with the top surface 3 of the lower punch 2, the edge Da of the raised portion D of the panel P is opposed to the groove portion 37, that is, the edge Da is above the shoulder portion 37c. And it opposes the shoulder part 37c.

  Further, the upper die 5 is lowered from the state in which the top end 39 of the leading blade 35 is in contact with the top surface 3 of the lower die punch 2. As the upper die 5 is lowered, the punch 31 abutting against the top surface 3 of the lower die punch 2 is pushed into the upper die holding hole 10 against the bias of the elastic member 40 as shown in FIG. The top end surface 24 of the flange blade 21 abuts on the end edge Da of the raised portion D formed on the panel P.

  By further lowering the upper die 5, the end edge Da of the raised portion D is pushed down by the top end surface 24 of the flange blade 21. As the raised portion D is pushed down by the top end surface 24 of the flange blade 21, the raised portion D is sequentially crushed as shown in FIG. 6 and the edge Da of the raised portion D slides on the top end surface 24 to cause a corner portion. 26, and is locked to the shoulder portion 37 c of the leading blade 25.

  Further, as the upper die 5 is lowered to the bottom dead center position, the raised portion D whose end Da is locked to the shoulder portion 37c is narrowed between the inner hole 25 of the flange blade 21 and the top portion 38 of the leading blade 35, and The base portion B is pressed against the top surface 3 of the lower punch 2 by the top end surface 24 of the flange blade 21, and an upward cylindrical flange F is formed as shown in FIG.

  Thereafter, the upper die 5 is raised from the bottom dead center to the top dead center. As the upper die 5 is raised, the upper die pad 7 is raised so that the flange blade 21 is separated from the panel P, and the leading blade 35 of the punch 31 comes out of the cylindrical flange F. The punch 31 is pressed by the elastic member 40. Then, the top end 33 of the shank 32 comes into contact with the base end surface 23 of the flange blade 21, and the shoulder portion 37 c of the groove portion 37 formed in the leading blade 35 returns to the protruding position where it protrudes from the top end surface 24 of the flange blade 21.

  According to the present embodiment configured as described above, the mechanism for forming the flange F is configured by the flange blade 21, the punch 31, and the elastic member 40 that presses and biases the punch 31, and descends as the upper mold 5 is lowered. The groove portion 37 of the leading blade 35 enters the hole E formed in the raised portion D of the panel P placed on the top surface 3 of the lower die punch 2 and faces the edge Da of the raised portion D, and The top end surface 24 of the descending flange blade 21 pushes down the raised portion D so that the end edge Da of the raised portion D is engaged with the groove portion 37, and the raised portion D is connected to the inner hole 25 of the flange blade 21 and the top portion 38 of the leading blade 35. Since the narrowed cylindrical flange F is formed between them, an operating mechanism such as a cam mechanism is unnecessary, and a cylindrical flange can be efficiently formed with a simple configuration and operation. In addition, since it is configured compactly without an operating mechanism such as a cam mechanism, the installation position and the number of installations can be easily secured without being limited to the installation of the flange blades 21, punches 31, and the like.

  Further, there is no component on the top surface 3 or the like of the lower die pad 2, and the workability of carrying in and carrying out the panel P is excellent in combination with the flange F being projected upward from the base portion B.

(Second Embodiment)
In the second embodiment of the present invention, for example, a case where a panel P in which a flange Fa is formed along the side edge of the base portion B as shown in a perspective view of FIG. The operation will be described with reference to the operation explanatory diagrams (b) to (f).

  In the press die 50, a lower die punch 51 having a flat top surface 52 that follows the base portion B of the panel P is disposed on a lower die (not shown) as shown in FIG. On the other hand, an upper die pad provided on an upper die (not shown) is provided with a top end surface 62 facing the top surface 52 of the lower die punch 51 and a flat flange molding surface 63 extending in the same direction as the vertical movement direction of the upper die. A flange blade 61 is provided, and a leading blade 71 is provided on the upper pad adjacent to the flange blade 61 via an elastic member. The leading blade 71 is biased to a protruding position where the top end 75 protrudes downward from the top end surface 62 of the flange blade 61.

  The leading edge 71 is formed on the base 72 that slides on the flange forming surface 63, is formed continuously on the base 72 and extends in a concave groove 73 that faces the flange forming surface 63, and is formed continuously on the groove 73. There is a top 74 that can be opposed to the surface 63 with a gap, and the groove 73 is continuous with the base 72 and continuously with the tapered surface 73a and the tapered surface 73a that is separated from the flange forming surface 63 as it is separated from the base 72. A bottom surface 73b that faces the flange forming surface 63, and a shoulder portion 73c that approaches the flange forming surface 63 side as it moves from the bottom surface 73b to the top 74 side.

  On the other hand, as shown in FIG. 8B, the panel P as a material is formed with a raised portion G that bulges along the edge Ga forming the flange Fa of the flat base portion B.

  Next, the operation of the press die 50 will be described with reference to FIGS.

  As shown in FIG. 8B, the upper die is held at the top dead center separated upward from the lower die punch 51 provided in the lower die. At this time, the leading blade 71 is pressed and urged by the elastic member, and the top portion 74 and the shoulder portion 73 c of the groove 73 are held at a protruding position where the leading edge 71 protrudes downward from the top end surface 62 of the flange blade 61.

  With the upper mold held at the top dead center position, the panel P, which is a material, is loaded and placed on the top surface 52 of the lower mold punch 51.

  With the base portion B of the panel P placed and set on the top surface 52 of the lower die punch 51, the upper die is lowered from the top dead center toward the lower die. As the upper die is lowered, the upper die pad is lowered together with the upper die, and the top 74 of the leading blade 71 protruding from the top end surface 62 of the flange blade 61 is the raised portion G of the panel P as shown in FIG. The edge Ga faces the groove 73, that is, the edge Ga is above the shoulder 73c and faces the shoulder 73c.

  Further, the upper die is lowered and the top end 75 of the leading blade 71 comes into contact with the top surface 52 of the lower die punch 51 as shown in FIG. Furthermore, the top end face 62 of the flange blade 61 contacts the edge Ga of the raised portion G of the panel P by lowering the upper mold.

  By further lowering the upper die, the edge Ga of the raised portion G is pushed down by the top end face 62 of the flange blade 61. As shown in FIG. 8 (e), the raised portion G is sequentially crushed as the raised end G is pushed down by the top end surface 62 of the flange blade 61, and the edge Ga of the raised portion G slides on the top end surface 62. Then, it protrudes from the corner portion 63 and is locked to the shoulder portion 73c of the leading blade 71.

  Further, as the upper die is lowered to the bottom dead center position, the raised portion G whose edge Ga is locked to the shoulder portion 73c is narrowed between the flange forming surface 63 of the flange blade 61 and the top portion 74 of the leading blade 71, and the flange is formed. The base portion B is pressed against the top surface 52 of the lower punch 51 by the top end surface 62 of the blade 61, and an upward flange F is formed as shown in FIG.

  After that, the upper mold is raised from the bottom dead center to the top dead center. When the upper die is raised, the upper die pad is raised, the flange blade 61 and the leading blade 71 are separated from the panel P, the leading blade 71 is pressed by the elastic member, and the shoulder portion of the groove 73 formed in the leading blade 71 73c returns to the protruding position protruding from the top end face 62 of the flange blade 61.

  According to the present embodiment configured as described above, the mechanism for forming the flange Fa is configured by the flange blade 61, the leading blade 71, and the elastic member that biases the leading blade 71, and descends as the upper die is lowered. The groove 73 of the leading blade 71 is opposed to the edge Ga of the raised portion G of the panel P placed on the top surface 52 of the lower punch 51, and the top end surface 62 of the flange blade 61 that descends the raised portion G. Since the end edge Ga of the raised portion G is pushed down and locked to the groove portion 73 and the raised portion G is formed between the flange forming surface 63 of the flange blade 61 and the top portion 74 of the leading blade 71, the cam flange is formed. An operation mechanism such as a mechanism is not required, and the flange can be formed efficiently with a simple configuration and operation. Further, since it is configured compactly without an operating mechanism such as a cam mechanism, it is possible to easily secure the degree of freedom of the installation position and the number of installation without being limited to the installation of the flange blade 61, the leading blade 71 and the like. Further, there is no structural member on the top surface of the lower die pad, and the workability of carrying in and out the panel P is excellent in combination with the flange Fa projecting upward from the base portion B.

DESCRIPTION OF SYMBOLS 1 Press die 2 Lower mold punch 5 Upper mold 7 Upper mold pad 8 Top part L Reference line 10 Upper mold holding hole 14 Energizing means holding holes 21, 61 Flange blades 24, 62 Top end face 25 Inner hole (flange molding surface)
26 Corner portion 31 Punch 35, 71 Leading edge 36, 72 Base portion 37, 73 Groove portion 37a, 73a Tapered surface 37b, 73b Bottom surface 37c, 73c Shoulder portion 38 Top portion 39 Top end 50 Press die 63 Flange molding surface P Panel B Base portion D Raise Part Da Edge E Hole F, Fa Flange G Raised part Ga Edge

Claims (4)

A lower die punch provided on the lower die and a flange blade and a leading blade provided on the upper die which are arranged opposite to the lower die and move up and down, and the upper die is mounted on the panel placed on the top surface of the lower die punch. A pressing method for forming a flange with the flange blade and the leading blade by lowering the mold,
The flange blade has a top end surface facing the top surface of the lower die punch, and a flange forming surface extending continuously in the same direction as the vertical movement direction of the upper die via a corner portion on the top end surface. ,
The leading blade has a groove and a top that is continuously formed in the groove and can be opposed to the flange forming surface with a gap,
The groove portion of the leading blade that descends as the upper die descends is opposed to the edge of the raised portion formed in the panel placed on the top surface of the lower die punch, and the top end surface of the descending flange blade is Press working characterized in that a bulging portion is pressed down so that the edge of the bulging portion is locked in the groove portion, and the bulging portion is formed between a flange forming surface of a flange blade and a top portion of a preceding blade. Method. A lower die punch provided on the lower die and a flange blade and a leading blade provided on the upper die which are arranged opposite to the lower die and move up and down, and the upper die is mounted on the panel placed on the top surface of the lower die punch. A press mold for forming a flange with the flange blade and the leading blade by lowering the mold,
The flange blade has a top end surface facing the top surface of the lower die punch, and a flange forming surface extending continuously in the same direction as the vertical movement direction of the upper die via a corner portion on the top end surface. ,
The leading blade has a groove and a top that is continuously formed in the groove and can be opposed to the flange forming surface with a gap,
The groove portion of the leading blade that descends as the upper die descends is opposed to the edge of the raised portion formed in the panel placed on the top surface of the lower die punch, and the top end surface of the descending flange blade is A pressing metal characterized in that a bulging portion is pushed down so that an edge of the bulging portion is locked in the groove portion, and the bulging portion is formed between a flange forming surface of a flange blade and a top portion of a preceding blade. Type. The flange forming surface is a cylindrical inner hole formed in the flange blade,
The groove portion is an annular groove shape, and the top portion is a cylindrical shape that can be opposed to the inner hole with a gap,
The groove portion of the leading blade that descends as the upper die descends enters a hole formed in the raised portion of the panel placed on the top surface of the lower die punch and faces the edge of the raised portion, and The top end surface of the descending flange blade pushes down the raised portion, and the edge of the raised portion is locked to the groove portion, and the raised portion is narrowed between the inner hole of the flange blade and the top portion of the preceding blade. The press die according to claim 2, wherein the die is molded. The flange molding surface is a planar shape extending in the same direction as the vertical movement direction of the upper mold, the groove portion is a concave groove shape extending facing the flange molding surface, and the top portion is the flange molding. It can be opposed to the surface with a gap,
The groove portion of the leading blade that descends as the upper die descends is opposed to the edge of the raised portion formed in the panel placed on the top surface of the lower die punch, and the top end surface of the descending flange blade is The ridge is pushed down so that the edge of the ridge is locked in the groove, and the ridge is formed between the flange forming surface of the flange blade and the top of the leading blade. 2. A press die according to 2.

Images