WO2021171759A1 - せん断金型およびプレス成形方法 - Google Patents
せん断金型およびプレス成形方法 Download PDFInfo
- Publication number
- WO2021171759A1 WO2021171759A1 PCT/JP2020/047846 JP2020047846W WO2021171759A1 WO 2021171759 A1 WO2021171759 A1 WO 2021171759A1 JP 2020047846 W JP2020047846 W JP 2020047846W WO 2021171759 A1 WO2021171759 A1 WO 2021171759A1
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- WIPO (PCT)
- Prior art keywords
- shearing
- die
- shear
- edge
- fitting portion
- Prior art date
Links
- 238000010008 shearing Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000000465 moulding Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000005121 nitriding Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 30
- 238000012423 maintenance Methods 0.000 description 6
- 229910001315 Tool steel Inorganic materials 0.000 description 4
- 238000007542 hardness measurement Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 3
- 229910000997 High-speed steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
-
- 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
- B21D22/20—Deep-drawing
- B21D22/206—Deep-drawing articles from a strip in several steps, the articles being coherent with the strip during the operation
-
- 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
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/02—Die constructions enabling assembly of the die parts in different ways
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/28—Associations of cutting devices therewith
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
- B23D35/001—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools cutting members
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/001—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines for trimming deep drawn products
Definitions
- the present invention relates to a shear die having excellent mold galling resistance, and relates to a press molding method having a shearing step using the shear die.
- press molding using a press device and a press die is mainly used.
- press molding when processing a metal plate as a material into a desired part shape, unnecessary materials are used for blanking processes that shear blanks from coil materials, molding processes such as bending and drawing, and final products. It is composed of a trim process that cuts off.
- Patent Document 1 in order to prevent seizure during press molding, a protective film by the PVD method is applied on the molding surface in contact with the object to be molded to improve wear resistance. Excellent coating tools have been proposed.
- Patent Documents 2 and 3 propose a tool steel having excellent mold galling resistance by optimizing the composition of the tool steel.
- the present invention has been made in view of such circumstances, and in the press forming process, the time and cost required for replacement and maintenance of the die tool in the shearing process are reduced, and the ultra-high tension steel plate is used. It is an object of the present invention to provide a shearing die for preventing damage to a die tool in shearing, and to propose a press forming method having a shearing process using the shearing die.
- the shearing die of the present invention which advantageously solves the above problems, is the first of the metal plates in obtaining a molded product in a press working process in which a molded product is produced from a metal plate by press molding, which has a plurality of shearing steps. It is a shearing die for shearing in a direction intersecting the shearing edge of the above, and the shearing blade in the vicinity of the region in contact with the end of the first shearing edge is composed of a removable fitting portion. It is characterized by.
- the press forming method according to the present invention is a press forming method for a metal plate having a plurality of shearing steps, and includes a first shearing step of shearing while leaving a surplus portion in a part of the outer shape of the molded product.
- the second shearing step includes a second shearing step of shearing the surplus portion in a direction intersecting the shearing edge by the first shearing step to form a molded product shape, and the shearing die is used in the second shearing step.
- the surplus portion is sheared so that the fitting portion comes into contact with the end portion of the shear edge obtained in the first shearing step.
- the shearing die of the present invention the time and cost required for replacement and maintenance of the die tool in the shearing process of the press forming are reduced, and the die tool is damaged in the shearing process of the ultra-high tension steel plate. It becomes possible to provide a shearing die that prevents the above.
- the shearing die since the shearing die is used in the second shearing step, the time and cost required for replacement and maintenance of the die tool in the shearing step are reduced, and the height is extremely high. It is possible to prevent damage to the die tool during shearing of a tension steel plate, and to use a press forming method with a high operating rate and reduced cost.
- the fitting portion is (a) made of a mold steel having a hardness higher than that of a shear blade other than the fitting portion, and (b) is subjected to surface nitriding treatment. , And (c) it is preferable that at least one condition selected from being subjected to the coating treatment is satisfied. By doing so, the life of the shear blade at the fitting portion can be improved.
- the fitting portion has a length of 1 mm or more on both sides of the position where the shear blade comes into contact with the end of the first shearing edge. .. By doing so, the effect of the fitting portion can be effectively obtained.
- the tensile strength of the metal plate exceeds 980 MPa. This is a method that can be applied to such ultra-high-strength steel sheets and can be sheared accurately for a long period of time.
- FIG. 1 It is a schematic diagram which shows the shape of the hat-shaped press-molded article applied to one Embodiment of this invention, (a) shows the perspective view seen from the side which has a back-cut shape, (b) is the back-cut shape. The perspective view seen from the side without the is shown, and (c) shows the side view.
- (A) is a perspective view schematically showing a shearing method using a conventional shearing die, and (b) is an enlarged perspective view showing an upper blade of the conventional shearing die.
- (A) is a perspective view schematically showing a shearing method according to an embodiment of the present invention, and (b) is a perspective view showing an enlarged upper blade of a shearing die according to an embodiment of the present invention. be.
- FIG. 1 It is a perspective view which shows typically the die composition arrangement of the press molding used in an Example.
- A is a perspective view schematically showing an observation position of an upper blade of a shearing die according to an example of the invention, and (b1) to (d1) are before shearing, after 5,000 times shearing, and after 10,000 times shearing, respectively.
- B2 to (d2) are schematic views showing the degree of wear seen from the direction shown in the photograph.
- FIG. 1 is a perspective view schematically showing the observation position of the upper blade of the shearing die according to the conventional example, and (b1) to (d1) are before shearing, after 5,000 times shearing, and after 10,000 times shearing, respectively.
- B2) to (d2) are schematic views showing the degree of wear seen from the direction shown in the photograph.
- the inventors when further shearing the region including the sheared edge once sheared, the shearing that comes into contact with the vicinity of the end of the sheared edge once sheared.
- the damaged state of the blade was observed.
- FIG. 1 (a) shows a perspective view of the hat-shaped press-molded product 100 from the side having the back-cut shape 90
- FIG. 1 (b) shows the side of the hat-shaped press-molded product 100 without the back-cut shape.
- a perspective view is shown
- FIG. 1 (c) shows a side view of the hat-shaped press-molded product 100.
- FIG. 2 is a schematic perspective view showing a press molding process of the hat-shaped press-molded product.
- the coil of the metal plate used as the material is slit-processed so as to be the hoop material 101 having a width of 200 mm, and set in the uncoiler. After correcting the curl of the hoop material 101 discharged from the uncoiler with a leveler, the hoop material 101 is fed out by 70 mm each time one press molding is completed using a feeder, and further press molding is performed.
- the first shearing process (blanking) 11 is performed in order to provide slits at both ends of the hoop material 101.
- piercing 12 is performed by punching a circular hole in the center of the width of the hoop material 101.
- the hoop material in a flat state is bent, and the hat cross-sectional shape is formed 14.
- a second shearing process (flange trim) 15 is performed to trim both ends of the flange portion that is outside the product (surplus portion) of the molded hat cross-sectional shape part.
- shearing (flat trim) 16 for trimming the top plate surface is performed.
- the idle 13 shown in FIG. 2 is arranged in a mold such as between the second step and the third step, between the third step and the fourth step, and between the fourth step and the fifth step. , Indicates a process in which no processing is performed because the molds cannot be arranged continuously.
- the material feeding direction FD is also indicated by an arrow.
- the shearing die used for the flange trim 15 in the fourth step is a second shearing step in which the sheared edge once sheared in the first shearing step (blanking) 11 is sheared again.
- the mold is shown in FIG. FIG. 3A shows the mold arrangement before shearing, FIG. 3B shows the mold arrangement during shearing, and FIG. 3C shows the mold arrangement after shearing.
- the shearing die used for the flange trim 15 is an upper die 1 composed of a pad 3 and a shearing blade (upper blade) 4, and a workpiece S is pressed from below, and the shearing blade (lower blade) 5 is pressed.
- FIG. 4 shows the position of the shearing process that the molded product receives in each shearing step of the press molding step shown in FIG.
- FIG. 4A shows a perspective view seen from the side having the back cut shape 90
- FIG. 4B shows a perspective view seen from the side having no back cut shape.
- the sheared edge 21 that has been sheared in the blanking 11 of the first step is included, and the intersecting direction 23 is further sheared by the flange trim 15 of the fourth step.
- the shear blade 4 that shears the flange portion while contacting the vicinity 24 (position marked with ⁇ ) of the end region of the first shear edge 21 shown in FIG. 4 is likely to be damaged.
- the measurement position was set so that the distance de from the end face ED of the shear edge was 0.1 mm, and the distance dg from the sagging side US and the burrs side LS surface was 0.1 mm. Further, in the central portion of the plate thickness, the pitch dp was set to 0.1 mm from the end face ED of the shear edge toward the IS inside the plate, and the hardness was measured.
- FIG. 6 shows the relationship between the measured hardness and the measurement position.
- the Vickers hardness is about 600 to 700 Hv in the vicinity of the end face ED of the shear edge.
- the hardness decreases from the end face ED of the shear edge toward the IS inside the plate, and the IS inside the plate, that is, the hardness of the base metal itself is about 500 Hv. From the above, it can be seen that the material in the vicinity of the end face ED of the shear edge is work-hardened by shearing, so that the strength is locally high.
- FIG. 7 shows a conventional general shear blade.
- FIG. 7A is a perspective view schematically showing a shearing method using a conventional shearing die
- FIG. 7B is an enlarged perspective view showing an upper blade 4 of the conventional shearing die.
- the material of the shear blade 4 is often made of cold mold steel SKD11 or the like.
- FIG. 8 shows a shear blade according to an embodiment of the present invention.
- FIG. 8A is a perspective view schematically showing the shearing method according to the present embodiment
- FIG. 8B is an enlarged perspective view showing the upper blade 4 of the shearing die according to the present embodiment. ..
- the insert structure is such that the portion of the shear blade corresponding to the region 24 indicated by ⁇ in FIG. 4 can be replaced as the fitting portion 7.
- the main body of the shear blade 4 is made of cold mold steel SKD11 or the like, and the fitting portion 7 is at least harder than the main body and has wear resistance and sliding characteristics.
- the surface of the fitting portion 7 may be subjected to nitriding treatment in order to increase the hardness of the surface of the fitting portion 7, or may be subjected to coating treatment such as PVD in order to ensure high slidability.
- the shear blade 4 of the present embodiment has a replaceable structure, the shear blade 4 has a long life in mass production press molding, its replacement is easy, and it is fitted even when a nitriding treatment or a coating treatment is performed. Since it is sufficient to process only the landing part, the cost required for maintenance can be greatly reduced.
- a press-molded die having the die structure shown in FIG. 9 was produced.
- the target material was a cold-rolled steel sheet (plate thickness 1.4 mm) having a tensile strength of 1470 MPa class, and the part having the cross-sectional shape of the hat shown in FIG. 1 was press-formed.
- the produced mold is a hoop material slit to a width of 200 mm, which is blanked 11 in the first step, pierced 12 in the second step, and bent (molded 14) in the third step.
- Flange trim 15 processing was performed in the 4th step, and flat trim 16 processing was performed in the 5th step.
- the hoop material 101 was fed out by 70 mm and continuously press-molded 10,000 times at a speed of 30 times / minute. Further, in the blanking 11, piercing 12, flange trim 15, and flat trim 16 steps, the shear clearance was set to 12.5% of the plate thickness.
- all the shear blades that actually come into contact with the material in the manufactured mold were made of general cold mold steel SKD11.
- the hardness of SKD11 was 58 HRC.
- the shear blade main body portion of the flange trim 15 step is made of cold mold steel SKD11, and the fitting portion 7 is sheared by the blanking 11 step of the first step and comes into contact with the end of the work-hardened sheared edge.
- the width was set to a range of 20 mm centered on the area to be sheared.
- the material of the fitting portion 7 was made of powdered high-speed steel SKH51.
- the hardness of SKH51 was 64 HRC.
- the surface of the fitting portion 7 in contact with the material S to be processed was subjected to a TiC-based PVD coating treatment.
- a TiC-based PVD coating treatment for comparison, even if all the shear blades in the flange trim process were made of SKD11, continuous press working was performed under the same conditions.
- FIGS. 10 and 11 Photographs of shear blades in 15 steps of flange trim when continuously press-molded 10,000 times under the above molding conditions are shown in FIGS. 10 and 11, respectively, for the present embodiment and the conventional material.
- a conventional shear blade using SKD11 having a relatively low hardness as a shear blade is chipped at a position (indicated by a broken line) corresponding to the end portion of the work material when pressed about 5000 times. Occurred (Fig. 11 (c2)).
- Fig. 11 (c2) Occurred
- FIG. 11 (d2) When the number of presses was further increased to 10,000, it was confirmed that wear progressed from the chipped portion and the mold was significantly damaged and dented near the end of the work material.
- the shearing die structure is such that only the vicinity of the first sheared end face can be replaced, and the replacement part is other than that. It was shown that the mold damage during shearing can be suppressed by making the hardness higher than that of the steel material of the shearing blade and applying the PVD-based coating treatment.
- the present invention is not limited to the above-exemplified embodiment, and is a processing method including a plurality of shearing steps, and is a shearing die for a second shearing process that shears in a direction intersecting the shearing edge of the first shearing process. Suitable for application to molds.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Punching Or Piercing (AREA)
- Accessories And Tools For Shearing Machines (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
次に、本発明の実施形態について図面を参照しつつ説明する。
ここで、以下の説明では、実施形態として、図1に示すようなハット形の部品を図2に示すような工程で連続的に加工するプレス成形工程を事例に説明する。図1(a)は、ハット形のプレス成形品100の背切り形状90を有する側から見た斜視図を示し、図1(b)はハット形のプレス成形品100の背切り形状のない側から見た斜視図を示し、図1(c)はハット形のプレス成形品100の側面図を示す。図2は上記ハット形プレス成形品のプレス成形工程を示す模式的な斜視図である。
図2に記載の成形工程において、第1のせん断工程(ブランキング)11で一度せん断加工したせん断縁を再度せん断加工する第2のせん断工程として、第4工程のフランジトリム15に使用するせん断金型を図3に示す。図3(a)はせん断前の金型配置を示し、図3(b)はせん断中の金型配置を示し、図3(c)はせん断後の金型配置を示す。フランジトリム15に使用するせん断金型は、図3に示すようにパッド3およびせん断刃(上刃)4からなる上型1と、被加工材Sを下から押え、せん断刃(下刃)5を構成する下型2によって構成される。せん断時、被加工材Sが下型2上に載せられた状態で、パッド3とせん断刃4が下降し(図3(a))、被加工材Sをパッド3で押えた後(図3(b))、パッド3からはみ出た部分(スクラップとなる余剰部)6のみがさらに下降するせん断刃4によって切断される(図3(c))。
図2に示したプレス成形工程の各せん断工程において、成形品が受けるせん断加工の位置を図4に示す。図4(a)は背切り形状90を有する側から見た斜視図を示し、図4(b)は背切り形状のない側から見た斜視図を示す。図4に示すように、第1工程のブランキング11においてせん断加工されたせん断縁21を含み、交差する方向23を第4工程のフランジトリム15でさらにせん断加工する。この時、図4に示した第1のせん断縁21の端部領域近傍24(○印の位置)に接触しながらフランジ部をせん断加工するせん断刃4に損傷が生じ易い。
せん断加工を受けた引張強度1470MPa級の冷延鋼板S(板厚1.2mm)のせん断縁21付近の硬度を測定した。測定は微小硬度計を使用し、圧子の押し込み荷重は100gf(0.98N)とした。測定位置は図5に示すように、せん断クリアランスを板厚の12%として、せん断加工したせん断縁21近傍とし、ダレ側(上面)USからカエリ側(下面)LSにかけてピッチdpを0.1mmとし、硬度を測定した。このとき、測定位置はせん断縁の端面EDからの距離deを0.1mmとし、ダレ側USおよびカエリ側LS表面からの距離dgは0.1mmとした。また、板厚中央部において、せん断縁の端面EDから板内部ISに向かってピッチdpを0.1mmとし、硬度を測定した。図6に測定した硬度と測定位置の関係を示す。
図7に従来の一般的なせん断刃を示す。図7(a)は従来のせん断金型を用いたせん断方法を模式的に示す斜視図であり、図7(b)は従来のせん断金型の上刃4を拡大して示す斜視図である。せん断刃4の材質は冷間金型用鋼SKD11などで作製されることが多い。本発明の一実施形態にかかるせん断刃を図8に示す。図8(a)は本実施形態にかかるせん断方法を模式的に示す斜視図であり、図8(b)は本実施形態にかかるせん断金型の上刃4を拡大して示す斜視図である。これまでの知見から、一度せん断加工を受けることによって加工硬化したせん断縁21を含む領域を再度せん断加工する際に、加工硬化したせん断縁21近傍に接触する領域でせん断刃4の損傷が発生しやすいことから、図4の○で示した領域24に対応するせん断刃の部分を嵌着部7として取替可能なインサート構造とした。せん断刃4本体部分は冷間金型用鋼SKD11などで作製し、嵌着部7は少なくとも本体部よりも硬度が高く、耐摩耗性および摺動特性を備えるように粉末ハイス鋼SKH40やSKH51などの材質の工具鋼で作製し、場合によっては嵌着部7表面の硬度を上昇されるため窒化処理を施し、もしくは高い摺動性を確保するためにPVD等の被膜処理を施しても良い。
100 プレス成形品
101 フープ材
1 上型
2 下型
3 パッド、板押え
4 せん断刃(上刃)
5 せん断刃(下刃)
6 スクラップ
7 嵌着部
8 ピアスパンチ
9 ボタンダイ
11 ブランキング
12 ピアス
13 アイドル
14 成形
15 フランジトリム
16 平トリム
17 曲げ刃
18 パンチ
21 ブランキングによるせん断縁
22 ピアスによるせん断縁
23 フランジトリムによるせん断方向
24 せん断刃がせん断縁と接触する領域
S 被加工材
FD 送り方向
Claims (5)
- 複数回のせん断工程を有する、金属板から成形品をプレス成形によって製造するプレス加工において、成形品を得るにあたり、前記金属板の第1のせん断縁に交差する方向にせん断加工するためのせん断金型であって、
前記第1のせん断縁の端部に接触する領域近傍のせん断刃を取り外し可能な嵌着部で構成していることを特徴とするせん断金型。 - 前記嵌着部が、(a)嵌着部以外のせん断刃よりも硬度が高い金型鋼で作製されること、(b)表面窒化処理を施されること、および(c)被膜処理を施されることのうちから選ばれた少なくとも1条件を満足していることを特徴とする請求項1に記載のせん断金型。
- 前記嵌着部は、せん断刃が前記第1のせん断縁の端部と接触する位置を中心に両側に1mm以上の長さを有していることを特徴とする請求項1または2に記載のせん断金型。
- 複数回のせん断工程を有する、金属板のプレス成形方法であって、
成形品の外形の一部に余剰部を残してせん断する第1のせん断工程と、
該第1のせん断工程による第1のせん断縁に交差する方向に前記余剰部をせん断して成形品形状とする第2のせん断工程とを含み、
該第2のせん断工程では、請求項1~3のいずれか1項に記載のせん断金型を用い、前記嵌着部が前記第1のせん断工程によるせん断縁の端部に接触するように、前記余剰部をせん断することを特徴とするプレス成形方法。 - 前記金属板の引張強度を980MPa超えとすることを特徴とする請求項4に記載のプレス成形方法。
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JP2021555514A JP7283570B2 (ja) | 2020-02-26 | 2020-12-22 | せん断金型およびプレス成形方法 |
MX2022010269A MX2022010269A (es) | 2020-02-26 | 2020-12-22 | Troquel de cizallamiento y metodo de formacion a presion. |
CN202080097105.7A CN115175776A (zh) | 2020-02-26 | 2020-12-22 | 剪切模具及冲压成形方法 |
EP20921910.4A EP4116008A4 (en) | 2020-02-26 | 2020-12-22 | SHEAR DIE AND PRESS MOLDING PROCESS |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS589227A (ja) * | 1981-07-07 | 1983-01-19 | Mitsubishi Electric Corp | 光学的サ−ボ装置 |
JPH11254054A (ja) * | 1998-03-13 | 1999-09-21 | Noritake Diamond Ind Co Ltd | 半導体装置製造用パンチ |
JP2000126900A (ja) * | 1998-10-21 | 2000-05-09 | Japan Aviation Electronics Industry Ltd | 短端子抜きパンチ用間欠機構 |
JP2001015665A (ja) * | 1999-07-01 | 2001-01-19 | Disco Abrasive Syst Ltd | ダムバーカットダイの製造方法及びダムバーカットダイ |
JP2006169624A (ja) | 2004-11-18 | 2006-06-29 | Hitachi Metals Ltd | 変寸抑制特性および耐カジリ性に優れた冷間ダイス鋼 |
JP2011189419A (ja) | 2010-03-12 | 2011-09-29 | Hitachi Metals Ltd | 耐摩耗性に優れた被覆工具 |
JP2012232344A (ja) | 2011-04-18 | 2012-11-29 | Nippon Koshuha Steel Co Ltd | プレス成形用金型及びプレス成形金型用保護膜の製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3785236A (en) * | 1972-05-30 | 1974-01-15 | Hager & Sons Hinge Mfg | Impact die and carbide insert therefor |
JPS589227U (ja) * | 1981-07-06 | 1983-01-21 | 株式会社東芝 | 異方性部材用抜型 |
JPH01164745A (ja) * | 1987-12-18 | 1989-06-28 | Kobe Steel Ltd | 繊維強化コンクリート用金属短繊維及びその製造装置 |
JP3030936B2 (ja) * | 1991-06-28 | 2000-04-10 | 日産自動車株式会社 | 絞り加工方法 |
KR20110093012A (ko) * | 2010-02-11 | 2011-08-18 | 주식회사 엔에프티 | 마모 저항성이 우수한 팁 장착형 블레이드를 갖는 타발금형 |
JP5555605B2 (ja) * | 2010-10-29 | 2014-07-23 | 株式会社アマダ | バリ除去装置 |
JP5569429B2 (ja) * | 2011-02-23 | 2014-08-13 | Jfeスチール株式会社 | ハットチャンネル部材のプレス成形方法 |
JP6694471B2 (ja) * | 2018-05-31 | 2020-05-13 | 株式会社Subaru | プレス型 |
-
2020
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS589227A (ja) * | 1981-07-07 | 1983-01-19 | Mitsubishi Electric Corp | 光学的サ−ボ装置 |
JPH11254054A (ja) * | 1998-03-13 | 1999-09-21 | Noritake Diamond Ind Co Ltd | 半導体装置製造用パンチ |
JP2000126900A (ja) * | 1998-10-21 | 2000-05-09 | Japan Aviation Electronics Industry Ltd | 短端子抜きパンチ用間欠機構 |
JP2001015665A (ja) * | 1999-07-01 | 2001-01-19 | Disco Abrasive Syst Ltd | ダムバーカットダイの製造方法及びダムバーカットダイ |
JP2006169624A (ja) | 2004-11-18 | 2006-06-29 | Hitachi Metals Ltd | 変寸抑制特性および耐カジリ性に優れた冷間ダイス鋼 |
JP2011189419A (ja) | 2010-03-12 | 2011-09-29 | Hitachi Metals Ltd | 耐摩耗性に優れた被覆工具 |
JP2012232344A (ja) | 2011-04-18 | 2012-11-29 | Nippon Koshuha Steel Co Ltd | プレス成形用金型及びプレス成形金型用保護膜の製造方法 |
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US20230082370A1 (en) | 2023-03-16 |
JPWO2021171759A1 (ja) | 2021-09-02 |
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