US20260183819A1 - Formation method of sidewall part - Google Patents

Formation method of sidewall part

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Publication number
US20260183819A1
US20260183819A1 US18/863,836 US202418863836A US2026183819A1 US 20260183819 A1 US20260183819 A1 US 20260183819A1 US 202418863836 A US202418863836 A US 202418863836A US 2026183819 A1 US2026183819 A1 US 2026183819A1
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United States
Prior art keywords
angle
intermediate blank
sidewall
state
top plate
Prior art date
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Pending
Application number
US18/863,836
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English (en)
Inventor
Tsuyoshi ICHIDA
Jiro KAGITANI
Takeshi Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sango Co Ltd
Original Assignee
Sango Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sango Co Ltd filed Critical Sango Co Ltd
Publication of US20260183819A1 publication Critical patent/US20260183819A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0272—Deflection compensating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools

Definitions

  • the present invention relates to a formation method of a sidewall part.
  • a “bending process” that is a process in which the sidewall part is formed by bending work and/or drawing work is generally performed.
  • FIG. 2 is a schematic sectional view for showing an example of such a bending process.
  • FIG. 2 only a part of the tabular blank 100 in which one sidewall part 220 of the product 200 is molded by the bending process is illustrated instead of the whole of the tabular blank 100 .
  • the sidewall part may open due to spring back and the angle between the top plate part and the sidewall part (which may be referred to as a “flange angle” hereafter) may become larger than an approximately right angle when the first intermediate blank 110 is picked out from a mold after completion of the bending process. Therefore, a process referred to as a “restriking process” is widely performed as additional processing such that the flange angle becomes an approximately right angle as a result of the sidewall part being opened due to the spring back after the bending process.
  • the restriking process is a process in which the sidewall part is pushed in until the flange angle reaches a restrike angle that is an angle (acute angle) which is smaller than a right angle by an angle corresponding to an opening angle of the sidewall part due to the spring back (which may be referred to as a “spring back amount” hereafter) and thereby the spring back amount is offset.
  • the second intermediate blank 120 in which the angle between the top plate part and the sidewall part (flange angle) is the restriking angle (acute angle) is manufactured.
  • the sidewall part opens due to spring back and the flange angle can become an approximately right angle when the second intermediate blank 120 is picked out from the mold after completion of the restriking process.
  • the spring back amount differs according to materials constituting the blanks, shapes of products to be molded and/or processing conditions, etc., for example, it is necessary to estimate the amount of spring back carefully for each products in order to set up the restriking angle appropriately. Moreover, even though the restriking angle is set up appropriately in this way, it is difficult to eliminate variation for each individual processed products completely in a mass production. Therefore, a “trimming process” that is a process in which the sidewall part is molded longer than its target shape expecting a certain amount of variation and thereafter a surplus part is cut off from the sidewall part has been widely performed as additional processing.
  • FIG. 2 is a schematic sectional view for showing an example of a trimming process as the above.
  • the top plate part of the second intermediate blank 120 is sandwiched and held between a third lower mold die 13 and the first pad 21
  • the sidewall part of the second intermediate blank 120 is sandwiched and held between the third lower mold die 13 and a second pad 22
  • a surplus part at a tip of the sidewall part of the second intermediate blank 120 is cut off by the third lower mold die 13 and a first punch 41 driven in the direction of the outlined white arrow shown in the drawing.
  • a scrap 300 is cut off from the tip of the sidewall part of the second intermediate blank 120 , and the product 200 which comprises the top plate part 210 and the sidewall part 220 installed upright at an approximately right angle from the end part of the top plate part 210 and having a prescribed length as exemplified in FIG. 1 is molded integrally.
  • cutting off the scrap 300 in a trimming process as mentioned above leads to waste of resources, and it causes deterioration of the product yield.
  • the length of the sidewall part 220 is short like the product 200 exemplified in FIG. 1 , it is necessary to make small the width (dimension in an extending direction of the sidewall part) of the third lower mold die 13 used in the above-mentioned trimming process. Namely, since it is necessary to make the third lower mold die 13 thin according to the length required for the sidewall part 220 like the product 200 , it may become difficult to configure the third lower mold die 13 so as to have durability for withstanding stress and/or impact which acts when cutting off the scrap 300 by the first punch 41 .
  • Patent Literature 1 Japanese Patent Application Laid-Open (kokai) No. 2001-225111
  • Patent Literature 2 Japanese Patent Application Laid-Open (kokai) No. 2014-91140
  • Patent Literature 3 Japanese Patent Application Laid-Open (kokai) No. 2014-221493
  • a method in which a box body which comprises a top plate part and a sidewall part installed upright from the top plate part by multistage warm-press processing covering from a metal plate consisting of a specific material, such as a magnesium is disclosed.
  • a box object which has a sharp corner part can be provided by performing bending work and/or drawing work and coining processing simultaneously.
  • the present inventor has found out that, by sandwiching and holding a top plate part of an intermediate blank which comprises the top plate part and a sidewall part formed integrally by bending an end part of a tabular blank at a predetermined first angle and pressing the tip end part of the sidewall part of the intermediate blank toward the base end side while maintaining a state where the sidewall part of the intermediate blank in which the sidewall part opened due to spring back and a flange angle that is the angle between the top plate part and the sidewall part became larger than the first angle has been pushed back until the flange angle coincides with the first angle.
  • a formation method of a sidewall part according to the present invention is a formation method of a sidewall part in a method in which a product comprising a top plate part and a sidewall part installed upright at a first angle that is a predetermined angle from an end part of the top plate part is molded integrally by press processing at an ordinary temperature from a tabular blank.
  • the present invention method includes a first step to a third step listed below.
  • the first step is a step in which an intermediate blank comprising a top plate part and a sidewall part formed integrally by bending an end part of the tabular blank at the first angle through bending work and/or drawing work is obtained.
  • the second step is a step in which the top plate part of the intermediate blank is sandwiched and held between a first holding member disposed outside the top plate part of the intermediate blank and a second holding member disposed inside the top plate part of the intermediate blank.
  • the third step is a step in which the sidewall part of the intermediate blank which was in a first state is brought to be in a second state and a first end part that is an end part on the tip end side of the sidewall part is pressed toward the base end side while maintaining the second state.
  • the first state is a state where the sidewall part of the intermediate blank opens due to spring back and a flange angle that is the angle between the top plate part and the sidewall part is larger than the first angle.
  • the second state is a state where the sidewall part is pushed back until the flange angle coincides with the first angle.
  • the end part on the tip end side of the sidewall part of the intermediate blank is pressed toward the base end side while maintaining a state where the sidewall part of the intermediate blank in which the sidewall part opened due to spring back and a flange angle that is the angle between the top plate part and the sidewall part became larger than the first angle has been pushed back until the flange angle coincides with the first angle.
  • residual stress causing spring back of the intermediate blank is canceled or reduced, and a product with the flange angle corresponding to the target first angle can be formed.
  • FIG. 1 is a schematic perspective view for showing an example of a product comprising a top plate part and a sidewall part installed upright at an approximately right angle from an end part of the top plate part.
  • FIG. 2 is a schematic view for showing an example of a method according to a conventional technology in which a sidewall part installed upright at an approximately right angle from an end part of a top plate part.
  • FIG. 3 is a flow chart for exemplifying a flow of respective steps included in a formation method of a sidewall part according to a first embodiment of the present invention (first method).
  • FIG. 4 is a schematic view for exemplifying a change of a shape and the like in a molding process to a product comprising a top plate part and a sidewall part from a tabular blank by the first method.
  • FIG. 5 is a schematic view for exemplifying one specific means for obtaining an intermediate blank comprising a top plate part and sidewall part formed integrally by bending an end part of a tabular blank at a first angle in the first step.
  • FIG. 6 is a schematic view for exemplifying one specific means for pressing an end part on the tip end side of the sidewall part of the intermediate blank toward the base end side while pushing back the sidewall part in a first state in the third step and bringing the intermediate blank to a second state.
  • FIG. 7 is a schematic view for exemplifying a situation where the third step is performed by advancing a punch having a predetermined shape in a first direction that is a predetermined direction in a formation method of a sidewall part according to a second embodiment of the present invention (second method).
  • FIG. 8 is a schematic view for exemplifying a situation where a first end part is pressed toward the base end side in a state where a part including at least the first end part of the sidewall part of the intermediate blank is housed in the inside of a closed space in the third step included in a formation method of a sidewall part according to a third embodiment of the present invention (the third method).
  • first method a formation method of a sidewall part according to a first embodiment of the present invention (which may be referred to as a “first method” hereafter) will be explained.
  • the first method is a formation method of a sidewall part in a method in which a product comprising a top plate part and a sidewall part installed upright at a first angle that is a predetermined angle from an end part of the top plate part is molded integrally by press processing at an ordinary temperature from a tabular blank.
  • a material constituting the tabular blank is not limited as long as it is possible to obtain an intermediate blank comprising a top plate part and sidewall part formed integrally by bending an end part of the tabular blank through bending work and/or drawing work.
  • metals such as stainless steel, copper and aluminum as well as alloys containing these metals and the like can be mentioned, for example.
  • the shape of the tabular blank is not limited in particular as long as at least a part which will become the top plate part and the sidewall part is tabular, and the shape may be planar or curved, and non-tabular part may exist in regions other than the parts which will become the top plate part and the sidewall part.
  • the shape of the tabular blank is a planar rectangle, a planar elliptical or planar circular, for example.
  • the number of the sidewall parts installed upright at the end part of the top plate part may be one, or may be plural. When the number of the sidewall parts is plural, all the sidewall parts may be installed upright at an identical first angle on the same side with respect to the top plate part, or a part of the sidewall parts may be installed upright at a different first angle with respect to the top plate part. In the latter case, a part of the sidewall parts may be installed upright toward the side opposite to other sidewall parts with respect to the top plate part. Furthermore, the first method can be also applied to a method in which an annular sidewall part is prepared so as to surround a peripheral edge of the top plate part to mold a product with a bottomed cylindrical shape.
  • the first method includes a first step to a third step which will be explained in detail below.
  • FIG. 3 is a flow chart for exemplifying a flow of respective steps included in the first method
  • FIG. 4 is a schematic view for exemplifying a change of a shape and the like in a molding process to a product comprising a top plate part and a sidewall part from a tabular blank by the first method.
  • FIG. 2 similarly to the previously referred FIG. 2 , only a part of the tabular blank 100 in which one sidewall part 220 of the product 200 is molded by the bending process is illustrated instead of the whole of the tabular blank 100 also in FIG. 4 and FIG. 5 .
  • the first step is first performed in Step S 10 .
  • the first step is a step in which an intermediate blank comprising a top plate part and a sidewall part formed integrally by bending an end part of the tabular blank at the first angle through bending work and/or drawing work is obtained.
  • an end part of the tabular blank 100 as exemplified in (a) of FIG. 4 can be bent by bending work and/or reducing work at a first predetermined angle ⁇ 1 as shown by the black-painted arrow in (b) of FIG. 4 .
  • FIG. 5 is a schematic view for exemplifying one specific means for obtaining an intermediate blank 130 comprising a top plate part 131 and sidewall part 132 formed integrally by bending the end part of the tabular blank 100 at the first angle ⁇ 1 in the first step as described above.
  • the tabular blank 100 is sandwiched and held between a first lower mold die 11 and a first pad 21 .
  • FIG. 4 and (a) of FIG.
  • an end part of the tabular blank 100 projecting from between the first lower mold die 11 and the first pad 21 is bend at the predetermined first angle ⁇ 1 with a first bending blade 31 driven in a direction of the outlined white arrow shown in the drawing (refer to the arrow hatched with oblique lines in (b) of FIG. 5 ).
  • the intermediate blank 130 comprising the top plate part 131 and the sidewall part 132 formed integrally can be obtained.
  • the first angle ⁇ 1 is an approximately right angle typically, it is not limited to an approximately right angle and it can be an arbitrary angle required for the finally fabricated product.
  • the sidewall part 132 may open due to spring back when the intermediate blank 130 is picked out from a mold after completion of the first step (Step S 10 ), as shown with the outlined white arrow in (c) of FIG. 4 .
  • a state where the sidewall part of the intermediate blank opens due to spring back and a flange angle that is the angle between the top plate part and the sidewall part is larger than the first angle may be referred to as a “first state” hereafter.
  • the second step is a step in which the top plate part of the intermediate blank is sandwiched and held between a first holding member disposed outside the top plate part of the intermediate blank and a second holding member disposed inside the top plate part of the intermediate blank.
  • the top plate part 131 of the intermediate blank 130 is sandwiched and held between the first holding member 51 (for example, a die) disposed outside the top plate part 131 of the intermediate blank 130 and a second holding member 52 (for example, a pad) disposed inside the top plate part 131 of the intermediate blank 130 .
  • the third step is a step in which the sidewall part of the intermediate blank which was in a first state is brought to be in a second state and a first end part that is an end part on the tip end side of the sidewall part is pressed toward the base end side while maintaining the second state.
  • the first state is a state where the sidewall part of the intermediate blank opens due to spring back and a flange angle that is the angle between the top plate part and the sidewall part is larger than the first angle.
  • the second state is a state where the sidewall part is pushed back until the flange angle coincides with the first angle. Specifically, as shown by the black-painted arrow in (d) of FIG.
  • the sidewall part 132 of the intermediate blank 130 is pushed back (by a pad or the like which is not shown, for example) until the flange angle ⁇ f coincides with the first angle ⁇ 1 and thereby the second state is attained. While maintaining this second state, the first end part E 1 that is an end part on the tip end side of the sidewall part 132 of the intermediate blank 130 is pressed toward the base end side (bent part side), as shown by the arrow hatched with oblique lines in (d) of FIG. 4 .
  • Specific means for pushing back the sidewall part 132 of the intermediate blank 130 in the first state where the sidewall part 132 opens due to spring back and bringing the intermediate blank 130 to be in the second state in the third step is not limited in particular.
  • specific means for pressing the end part on the tip end side of the sidewall part 132 of the intermediate blank 130 (first end part E 1 ) toward the base end side while maintaining the second state is not limited in particular, either.
  • FIG. 6 is a schematic view for exemplifying a state where the second step in which the top plate part of the intermediate blank 130 is of sandwiched and held between the first holding member 51 (die) disposed outside the top plate part of the intermediate blank 130 and the second holding member 52 (pad) disposed inside the top plate part of the intermediate blank 130 has been completed. Since the sidewall part of the intermediate blank 130 is not restrained in this state, the intermediate blank 130 is in the first state where the sidewall part opens due to spring back and the flange angle ⁇ f is the second angle ⁇ 2 .
  • the third step is started, and the second state is attained by pushing back the sidewall part of the intermediate blank 130 until the flange angle ⁇ f is coincides with the first angle ⁇ 1 using the first pressing member 61 (for example, a pad) (refer to the black-painted arrow) as exemplified in (b) of FIG. 6 .
  • the end part on the tip end side of the sidewall part of the intermediate blank 130 is pressed toward the base end side by the second pressing member 62 (for example, a punch), as exemplified in (c) of FIG. 6 (refer to the arrow hatched with oblique lines).
  • the drive system of the first pressing member 61 and the second pressing member 62 may be a mechanical drive by a cam mechanism, etc., or may be a control drive by an actuator, etc.
  • the sidewall part of the intermediate blank which used to be in the first state can be brought to be in the second state and the third step in which the first end part that is an end part on the tip end side of the sidewall part of the intermediate blank is pressed toward the base end side while maintaining the second state can be performed as mentioned above, the above is only an example of the means for performing the third step to the last.
  • the third step (Step S 30 ) By performing the third step (Step S 30 ) as the above, the stress history which the tabular blank 100 received in the first step (Step S 10 ) is overwritten, and the residual stress causing the above-mentioned spring back is canceled. As a result, the possibility that the sidewall part 132 will open due to spring back when the intermediate blank 130 is picked out from a mold after completion of the third step is canceled or reduced. Namely, the product 200 comprising the top plate part 210 and the sidewall part 220 installed upright from the end part of the top plate part 210 at the first angle ⁇ 1 (not shown in FIG. 1 ) that is a predetermined angle as exemplified in FIG. 1 can be molded integrally from the tabular blank 100 by press working at an ordinary temperature.
  • the first end part E 1 that is an end part on the tip end side of the sidewall part 132 of the intermediate blank 130 is pressed toward the base end side (bent part side). Since stress in an extension direction remains in the sidewall part 132 as a result of the stress history, the sidewall part 132 opens slightly due to spring back resulting from the residual stress when the intermediate blank 130 is picked out from a mold after completion of the third step (refer to the part hatched with oblique lines in (e) of FIG. 4 ). From a viewpoint of attaining high dimensional accuracy in the product 200 , it can be considered to perform the “trimming process” described at the beginning of the present specification as additional processing.
  • the end part on the tip end side of the sidewall part of the intermediate blank is pressed toward the base end side while maintaining a state where the sidewall part of the intermediate blank in which the sidewall part opened due to spring back and a flange angle that is the angle between the top plate part and the sidewall part became larger than the first angle has been pushed back until the flange angle coincides with the first angle.
  • residual stress causing spring back of the intermediate blank is canceled or reduced, and a product with the flange angle corresponding to the target first angle can be formed.
  • the means exemplified in FIG. 6 is only an example of the means for performing the third step.
  • the second method is the above-mentioned first method, characterized in that the third step is performed by advancing a punch which has a predetermined shape toward the intermediate blank in a first direction that is a predetermined direction.
  • the third step is performed by advancing a punch which has a predetermined shape toward the intermediate blank in a first direction that is a predetermined direction.
  • FIG. 7 is a schematic view for exemplifying a situation where the third step is performed by advancing a punch having a predetermined shape in a first direction that is a predetermined direction in the second method.
  • the first direction is a direction parallel to a direction from the tip end side toward the base side of the sidewall part of the intermediate blank in the second state mentioned previously.
  • the first direction is indicated by the upward arrow D 1 hatched with oblique lines (which may be referred to as a “first direction D 1 ” hereafter).
  • a first surface 71 , a second surface 72 and a third surface 73 listed below.
  • the first surface 71 is an inclined plane formed at an end part on the tip end side (the downstream side in the first direction D 1 , namely the upper side in the drawing) of the punch 70 and inclined at a predetermined angle ⁇ s with respect to the first direction D 1 (refer to (b) of FIG. 7 ).
  • the first surface 71 inclines such that a distance from (the sidewall part 132 of) the intermediate blank 130 in a direction perpendicular to the first direction D 1 may become smaller as progressing to the base end side (the upstream side in the first direction D 1 , namely the lower side in the drawing) from the tip side of the punch 70 .
  • the second surface 72 is a surface which adjoins the base end side of the first surface 71 and has a shape corresponding to the outer surface of the sidewall part 132 of the intermediate blank 130 in the second state.
  • the outer surface of the sidewall part 132 of the intermediate blank 130 in the second state is a plane extending particularly to the top plate part 131 . Therefore, the second surface 72 of the punch 70 , which has a shape corresponding to the outer surface of the sidewall part 132 of the intermediate blank 130 in the second state is also a plane extending particularly to the top plate part 131 , and opposes to the outer surface of the sidewall part 132 of the intermediate blank 130 in the second state.
  • the third surface 73 is a surface which adjoins the base end side of the second surface 72 and has a shape which can come into contact with the first end part E 1 of the intermediate blank 130 in the second state.
  • the third surface 73 is formed as a plane extending particularly from the second surface 72 , and constitutes a level difference (step) with a height corresponding to the thickness of the first end part E 1 of the intermediate blank 130 .
  • the processing listed below are sequentially executed.
  • the punch 70 is advanced in the first direction D 1 toward the intermediate blank 130 fixed at a predetermined position by the top plate part 131 being sandwiched and held between the first holding member 51 (die) and the second holding member 52 (pad).
  • the punch 70 should just advance in the first direction D 1 relatively toward the intermediate blank 130 .
  • the intermediate blank 130 with the top plate part 131 sandwiched and held between the first holding member 51 and the second holding member 52 may be advanced in a direction opposite to the first direction D 1 toward the punch 70 fixed at a predetermined position.
  • the first end part E 1 is brought into contact with the first surface 71 of the punch 70 .
  • the sidewall part 132 of the intermediate blank 130 soon begins to be housed into a space between the second surface 72 of the punch 70 and the second holding member 52 (for example, pad) from the first end part E 1 .
  • the flange angle ⁇ f coincides with the target first angle ⁇ 1 , and the second state has been attained.
  • the first end part E 1 is brought into contact with the third surface 73 while maintaining the second state, as exemplified in (b) of FIG. 7 .
  • the first end part E 1 is pressed toward the base end side by the third surface 73 .
  • the third step is performed by advancing a punch which has a predetermined shape toward the intermediate blank in the first direction that is a predetermined direction.
  • the third step can be performed by a simpler configuration without requiring to drive many components intricately as exemplified in FIG. 6 , for example. Therefore, in accordance with the second method, spring back of the intermediate blank in a method for molding a product comprising a top plate part and sidewall part formed integrally by press working at an ordinary temperature from a tabular blank consisting of a common material can be cancelled or reduced while suppressing increase of the required labor, components and cost
  • the end part on the tip end side of the sidewall part of the intermediate blank is pressed toward the base end side while maintaining a state where the sidewall part of the intermediate blank in which the sidewall part opened due to spring back and a flange angle that is the angle between the top plate part and the sidewall part became larger than the first angle has been pushed back until the flange angle coincides with the first angle.
  • residual stress causing spring back of the intermediate blank is canceled or reduced, and a product with the flange angle corresponding to the target first angle can be formed.
  • the third method is the above-mentioned second method, characterized in that, in the third step, the first end part is pressed toward the base end side in a state where a part including at least the first end part of the sidewall part of the intermediate blank is housed in the inside of a closed space.
  • FIG. 8 is a schematic view for exemplifying a situation where the first end part is pressed toward the base end side in a state where a part including at least the first end part of the sidewall part of the intermediate blank is housed in the inside of a closed space in the third step included in the third method.
  • FIG. 8 is the same as FIG.
  • the first end part is pressed toward the base end side in a state where the part of the sidewall part of the intermediate blank which includes the first end part at least is housed in the inside of the closed space. More specifically, in the example shown in FIG. 7 , in the third step, the first end part E 1 is pressed toward the base end side by the third surface 73 in a state where a closed space is defined by the first holding member 51 and the second holding member 52 as well as the second surface 72 and the third surface 3 of the punch 70 and the sidewall part of the intermediate blank 130 is housed in the inside of the closed space.
  • the first end part is pressed toward the base end side in a state where a part including at least the first end part of the sidewall part of the intermediate blank is housed in the inside of a closed space. Therefore, in accordance with the third method, spring back of the intermediate blank in a method for molding a product comprising a top plate part and sidewall part formed integrally by press working at an ordinary temperature from a tabular blank consisting of a common material can be cancelled or reduced while further improving dimensional accuracy in the shape of the sidewall part of the formed product.
  • a formation method of a sidewall part according to the present invention is not limited to a case where a product having a planar sidewall part (flange) erected from one end edge in a shape of a straight line of a top plate part as mentioned above is molded.
  • the present invention method can be applied also to a case where a product having a curved sidewall part (flange) erected from one end edge in a shape of a curved line of a top plate part is molded.
  • the present invention method can be applied also to a case where a product having a sidewall part (flange) erected from all over the end edge of a top plate part is molded.
  • the present invention method can be applied also to a case where a bowl-shaped body that is a product having a sidewall part (flange) erected from all over the circumference of an end edge of a top plate part in a shape pf a disk, for example, is molded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US18/863,836 2023-05-09 2024-03-29 Formation method of sidewall part Pending US20260183819A1 (en)

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JP2023-076995 2023-05-09
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PCT/JP2024/013044 WO2024232182A1 (ja) 2023-05-09 2024-03-29 側壁部の形成方法

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WO2014065290A1 (ja) * 2012-10-23 2014-05-01 新日鐵住金株式会社 プレス加工方法及び底付容器
JP6500927B2 (ja) * 2017-03-28 2019-04-17 Ｊｆｅスチール株式会社 プレス成形装置及びプレス成形品の製造方法

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