JP2018099715A - Manufacturing method of pressed article - Google Patents

Manufacturing method of pressed article Download PDF

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JP2018099715A
JP2018099715A JP2016247689A JP2016247689A JP2018099715A JP 2018099715 A JP2018099715 A JP 2018099715A JP 2016247689 A JP2016247689 A JP 2016247689A JP 2016247689 A JP2016247689 A JP 2016247689A JP 2018099715 A JP2018099715 A JP 2018099715A
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manufacturing
press
surplus
workpiece
crushing
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一宏 小林
Kazuhiro Kobayashi
一宏 小林
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HANWA KOGYO KK
Hanwa Co Ltd
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HANWA KOGYO KK
Hanwa Co Ltd
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  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Punching Or Piercing (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a pressed article capable of obtaining a sharp edge on a peripheral wall of a recess, and having excellent manufacturing efficiency.SOLUTION: A manufacturing method of a pressed article, for manufacturing, by press working, a recess 2 on a workpiece 1, has a constitution in which, after releasing excess metal 6 generated by crushing of the workpiece 1 by a projection 4 into a gap part 5 formed around the projection 4 for recess 2 molding of a metal mold 3, sag 7 on a recess 2 peripheral wall generated in company with crushing by the projection 4 is buried by plastic flow in company with crushing of the excess metal 6.SELECTED DRAWING: Figure 1

Description

本発明はプレス加工品の製造方法に関するものである。   The present invention relates to a method for manufacturing a press-processed product.

被加工材に凹部をプレス加工して製造されるプレス加工品の製造方法としては、従来、特許文献1に記載されたものが知られている。この従来例において、配管用継手は、凸型が形成された金型によって厚板鋼板に凹状の座部や凹溝を潰し加工して製造される。   As a manufacturing method of a press-processed product manufactured by pressing a concave portion on a workpiece, a method described in Patent Document 1 is conventionally known. In this conventional example, the piping joint is manufactured by crushing a concave seat portion or a concave groove on a thick steel plate with a mold having a convex shape.

特開平6-335740号公報JP-A-6-335740

しかしながら、上述した従来例は、凸型による潰し加工に伴って座部等の周壁にダレが発生することから、エッジのシャープさが求められている場合には、これに応えることができないという問題がある。   However, since the conventional example described above generates sagging on the peripheral wall of the seat portion or the like due to the crushing process by the convex mold, when the edge sharpness is required, it is not possible to meet this problem. There is.

この問題は、プレス加工において座部等をひとまわり小さく成形して加工代を確保しておいた上で、切削加工を施すことにより解決可能であるが、この場合には切削加工の追加によって生産効率が大きく低下してしまう。   This problem can be solved by forming the seat part, etc., a little smaller in the press process and securing the machining allowance, and then performing the cutting process. Efficiency is greatly reduced.

本発明は以上の欠点を解消すべくなされたものであって、凹部の周壁においてシャープなエッジを得ることができ、かつ、生産効率に優れたプレス加工品の製造方法の提供を目的とする。   The present invention has been made to eliminate the above-described drawbacks, and an object of the present invention is to provide a method for producing a pressed product that can obtain a sharp edge on the peripheral wall of a recess and is excellent in production efficiency.

本発明によれば、上記目的は、
被加工材1に凹部2をプレス加工して製造されるプレス加工品の製造方法であって、
金型3の前記凹部2成型用の凸部4周りに形成された空隙部5内に前記凸部4による被加工材1の潰し加工に伴って生じる余肉6を逃がした後、
前記凸部4による潰し加工に伴って発生した凹部2周壁のダレ7を前記余肉6の潰し加工に伴う塑性流動によって埋めるプレス加工品の製造方法を提供することにより達成される。
According to the invention, the object is
A method of manufacturing a press-processed product manufactured by pressing a recess 2 in a workpiece 1,
After the surplus thickness 6 generated by the crushing of the workpiece 1 by the convex portion 4 is released in the gap portion 5 formed around the convex portion 4 for molding the concave portion 2 of the mold 3,
This is achieved by providing a method of manufacturing a press-processed product that fills the sagging 7 of the peripheral wall of the concave portion 2 generated by the crushing process by the convex part 4 by the plastic flow accompanying the crushing process of the surplus wall 6.

本発明によれば、被加工材1に凹部2を潰し加工する工程において生じた余肉6を、後工程において塑性流動させてダレ7が埋められる。前工程の金型3には凹部2成型用の凸部4に加えて空隙部5が形成されており、凸部4によって被加工材1に潰し加工が加えられると、凸部4に押し出された被加工材1の余肉6が空隙部5内へと逃げ込む。空隙部5が金型3において凸部4周りに配置されることにより、この凸部4によって成型され、また、成型に伴ってダレ7の発生する凹部2の周りに余肉6が配置されることから、この余肉6を後工程において潰し加工して塑性流動させれば、ダレ7を良好に埋めることができる。   According to the present invention, the excess 6 generated in the process of crushing the recess 2 in the workpiece 1 is plastically flowed in the subsequent process to fill the sag 7. In the mold 3 of the previous process, a cavity 5 is formed in addition to the convex part 4 for molding the concave part 2, and when the crushing processing is applied to the workpiece 1 by the convex part 4, it is pushed out to the convex part 4. The surplus material 6 of the workpiece 1 escapes into the gap 5. Since the gap 5 is arranged around the convex portion 4 in the mold 3, the extra space 6 is arranged around the concave portion 2 which is molded by the convex portion 4 and the sag 7 is generated along with the molding. For this reason, if the surplus material 6 is crushed and plastically flowed in a subsequent process, the sagging 7 can be satisfactorily filled.

したがって、本発明によれば、プレス加工により凹部2の周壁にシャープなエッジを得ることができる。また、切削加工した場合に比べて製造コスト、時間を格段に減少させることができ、生産効率を飛躍的に向上させることができる。   Therefore, according to the present invention, a sharp edge can be obtained on the peripheral wall of the recess 2 by pressing. Further, the manufacturing cost and time can be significantly reduced as compared with the case of cutting, and the production efficiency can be greatly improved.

上記空隙部5は、ダレ7が凹部2の周壁に全周に渡ってほぼ均等に発生することを考慮すれば、凸部4周りに全周に渡ってほぼ均等な大きさで形成することが望ましい。また、被加工材1に複数の凹部2、2、・・がある場合には、空隙部5は、各々の凸部4の周りに形成すれば足りる。さらに、凹部2、2同士が近接配置されているときには、凸部4周りの空隙部5、5同士を複合させ、それぞれの内部空間を連通させて構成することも可能である。この場合において、各凸部4の先端に、凹部2、2間の薄肉部8への余肉6の逃がしを促す傾斜面9を形成した場合には、断面積が小さいために塑性流動量が少なくなりやすい薄肉部8への余肉6の逃げ量をより増加させることができる。   In consideration of the fact that the sag 7 is generated almost uniformly on the peripheral wall of the concave portion 2 over the entire circumference, the gap portion 5 can be formed around the convex portion 4 with a substantially uniform size over the entire circumference. desirable. Further, when the workpiece 1 has a plurality of recesses 2, 2,..., It is sufficient that the gap 5 is formed around each of the protrusions 4. Further, when the recesses 2 and 2 are arranged close to each other, the gaps 5 and 5 around the protrusion 4 can be combined to communicate with each other. In this case, when the inclined surface 9 that facilitates the escape of the surplus wall 6 to the thin portion 8 between the concave portions 2 and 2 is formed at the tip of each convex portion 4, the amount of plastic flow is small because the cross-sectional area is small. It is possible to increase the escape amount of the surplus meat 6 to the thin-walled portion 8 that tends to decrease.

上記傾斜面9は、薄肉部8の断面積を考慮して傾斜角等を決定することが可能であるが、その高さ方向の寸法hを凹部2の底面に設定される表面粗さの寸法公差範囲内にした場合には、プレス加工後の切削加工が不要になるために、良好な生産効率を維持することができる。なお、上記傾斜面9は、薄肉部8に近づくに従って漸次凸部4の基端側に近接する方向に傾斜して構成することができる。また、凹部2の周壁に発生するダレ7の大きさは、凹部2の深さなどに応じて変わることから、空隙部5も凹部2の深さなどに応じてその容積を決定することが可能である。さらに、上述した空隙部5あるいは余肉6の大きさは、ダレ7を埋めることができる程度の体積があれば足りるが、やや大きく設定しておくことにより、シャープなエッジをより確実に得ることができる。この場合、残余の余肉6は抜き加工により落とせば足りる。   The inclined surface 9 can determine the inclination angle and the like in consideration of the cross-sectional area of the thin portion 8, but the height h dimension h is set to the surface roughness dimension set on the bottom surface of the recess 2. When it is within the tolerance range, it is not necessary to perform a cutting process after the press process, so that a good production efficiency can be maintained. In addition, the said inclined surface 9 can be comprised so that it may incline in the direction which approaches the base end side of the convex part 4 gradually as it approaches the thin part 8. FIG. In addition, since the size of the sag 7 generated on the peripheral wall of the recess 2 varies depending on the depth of the recess 2, the volume of the gap 5 can also be determined according to the depth of the recess 2, etc. It is. Furthermore, the size of the gap 5 or the surplus wall 6 described above is sufficient if it has a volume that can fill the sag 7, but by setting it slightly larger, a sharp edge can be obtained more reliably. Can do. In this case, it is sufficient to remove the remaining surplus meat 6 by punching.

上記被加工材1は、加圧により塑性変形可能なものであれば足りる。この場合において、被加工材1を金属板材とした上で、上記余肉6の潰し加工後に、外周縁部10に余肉6を逃がすようにして被加工材1を所定の板厚寸法tになるまで潰し加工し、次いで、上記外周縁部10を剪断加工により除去した場合には、板厚寸法tの精度を容易に高めることができる。すなわち、板厚寸法tに高い寸法精度が要求される場合には、加工前の金属板材に板厚寸法tの寸法精度が高いものを採用したり、プレス加工後に板厚調整のための切削加工を施したりすることが考えられるが、プレス加工によって板厚寸法tを調整した場合には、より生産効率を向上させることが可能になる。   The workpiece 1 may be any material that can be plastically deformed by pressurization. In this case, after the workpiece 1 is made of a metal plate, the workpiece 1 is adjusted to a predetermined plate thickness dimension t so as to allow the excess margin 6 to escape to the outer peripheral edge 10 after the surplus portion 6 is crushed. When the crushing is performed until the outer peripheral edge 10 is removed by shearing, the accuracy of the plate thickness dimension t can be easily increased. That is, when high dimensional accuracy is required for the plate thickness dimension t, a metal plate material before processing that has a high dimensional accuracy of the plate thickness dimension t is employed, or cutting processing for adjusting the plate thickness after press working However, when the plate thickness dimension t is adjusted by pressing, the production efficiency can be further improved.

上述した板厚調整のための余肉6の逃がしは、余肉6を被加工材1の外周縁よりもさらに外側に向かって押し出すようにしても足りるが、被加工材1の外周縁部10において表裏いずれかの方向に押し出すようにした場合には、後工程の剪断加工において余肉6を削る際の削り取り幅を小さくできるために、後述する実施の形態のように、外周面をきれいな剪断面にするためのシェービング加工を利用して除去することが可能になり、生産効率をさらに向上させることが可能になる。   The above-described escape of the surplus 6 for adjusting the plate thickness may be performed by pushing the surplus 6 further outward than the outer peripheral edge of the workpiece 1, but the outer peripheral edge 10 of the workpiece 1 is sufficient. In the case of extruding in either the front or back direction, in order to reduce the scraping width when scraping the surplus 6 in the subsequent shearing process, the outer peripheral surface is sheared cleanly as in the embodiment described later. It becomes possible to remove using a shaving process for forming a surface, and the production efficiency can be further improved.

以上のプレス加工は、上述した各プレス加工工程の各々を単発加工により実現しても足りるが、順送加工にした場合には、上述のように工程数がやや多くても生産効率を良好にすることができる。   In the above press work, it is sufficient to realize each of the above-mentioned press work processes by a single process, but in the case of progressive feed, the production efficiency is improved even if the number of processes is slightly larger as described above. can do.

また、上述したプレス加工による板厚調整は、
略板状の被加工材1をプレス加工して製造されるプレス加工品の製造方法であって、
金型3に形成された板厚調整用の押圧面部11により被加工材1を所定の板厚寸法tに潰し加工するとともに、該潰し加工に伴って発生する余肉6'を前記金型3の外周縁部10に形成された空隙部5'内に逃がした後、
被加工材1の外周縁部10を前記余肉6'とともに剪断加工により除去するプレス加工品の製造方法により実現することもできる。
Moreover, the plate thickness adjustment by the press work mentioned above is
A method of manufacturing a press-processed product manufactured by pressing a substantially plate-shaped workpiece 1,
The workpiece 1 is crushed to a predetermined plate thickness dimension t by the pressing surface portion 11 for adjusting the plate thickness formed on the mold 3, and the surplus wall 6 ′ generated by the crushing process is removed from the mold 3. After escaping into the gap 5 ′ formed in the outer peripheral edge 10 of the
It can also be realized by a manufacturing method of a press-processed product in which the outer peripheral edge 10 of the workpiece 1 is removed together with the surplus 6 'by shearing.

すなわち、板厚寸法tに高い寸法精度が求められている場合には、従来においては例えば特開2009-202219号公報においても示唆されているように、上述したエッジのシャープさを実現するときと同様に、プレス加工において板厚をひとまわり大きく成形して加工代を確保しておいた上で、切削加工を施すことがなされていたが、この場合には切削加工の追加によって生産効率が大きく低下してしまう。この発明は、かかる問題を解決すべくなされたもので、板厚寸法の寸法精度を高めることができ、かつ、生産効率に優れたプレス加工品の製造方法の提供を目的とするものである。   That is, when high dimensional accuracy is required for the plate thickness dimension t, conventionally, as suggested in, for example, Japanese Patent Application Laid-Open No. 2009-202219, the above-described edge sharpness is realized. Similarly, in the press work, the plate thickness was formed slightly larger and the machining allowance was secured, and then cutting was performed. In this case, however, the production efficiency was increased by adding the cutting work. It will decline. The present invention has been made to solve such a problem, and an object of the present invention is to provide a manufacturing method of a press-processed product that can improve the dimensional accuracy of the plate thickness dimension and is excellent in production efficiency.

この発明によれば、略板状の被加工材1は、潰し加工により所定の板厚寸法tに成型される。また、この潰し加工において発生する余肉6'は、被加工材1の外周縁部10形成される空隙部5'内に逃がされ、後工程のトリム加工において外周縁部10とともに除去される。すなわち、この発明においては、余肉6'の塑性流動先が被加工材1の外周縁部10にされることにより、後工程における除去をしやすくされる。   According to this invention, the substantially plate-shaped workpiece 1 is formed into a predetermined thickness t by crushing. Further, the excess 6 'generated in the crushing process is released into the gap 5' formed in the outer peripheral edge 10 of the workpiece 1, and is removed together with the outer peripheral edge 10 in the subsequent trim processing. . That is, in the present invention, the plastic flow destination of the surplus 6 'is made the outer peripheral edge portion 10 of the workpiece 1, thereby facilitating removal in a subsequent process.

したがって、本発明によれば、プレス加工により板厚寸法tの寸法精度を高めることができる。また、切削加工した場合に比べて製造コスト、時間を格段に減少させることができ、生産効率が飛躍的に向上する。   Therefore, according to the present invention, the dimensional accuracy of the plate thickness dimension t can be increased by pressing. In addition, the manufacturing cost and time can be significantly reduced compared to the case of cutting, and the production efficiency is dramatically improved.

また、略板状の被加工材1に凹部2が形成されている場合には、
被加工材1に形成された凹部2内に挿入、充填される押さえ部12を金型3に備え、上記潰し加工に際して余肉6'の凹部2内への塑性流動を押さえ部12により規制して構成すれば、凹部2の寸法精度を良好に維持することができる。
Moreover, when the recessed part 2 is formed in the substantially plate-shaped workpiece 1,
The pressing part 12 inserted and filled in the recess 2 formed in the workpiece 1 is provided in the mold 3, and the plastic flow into the recess 2 of the surplus wall 6 ′ is restricted by the pressing part 12 during the crushing process. If configured, the dimensional accuracy of the recess 2 can be maintained satisfactorily.

以上の説明から明らかなように、本発明によれば、凹部の周壁においてシャープなエッジを得ることができ、かつ、生産効率に優れたプレス加工品の製造方法を提供することができるために、切削加工品からプレス加工品への切り替えによるコストダウン等に寄与することができる。   As is clear from the above description, according to the present invention, it is possible to obtain a sharp edge in the peripheral wall of the recess, and to provide a manufacturing method of a press-processed product excellent in production efficiency. This can contribute to cost reduction by switching from a cut product to a press product.

順送加工におけるストリップレイアウトを示す図である。It is a figure which shows the strip layout in progressive processing. プレス加工品を示す図で、(a)は平面図、(b)は(a)の2B-2B線断面図、(c)は(a)の2C-2C線断面図である。It is a figure which shows a press work product, (a) is a top view, (b) is the 2B-2B sectional view taken on the line of (a), (c) is the sectional view on the 2C-2C line of (a). 凹溝の潰し加工工程を説明する図で、(a)はプレス加工前である上死点における状態を示す平面図、(b)は(a)の3B-3B線断面図、(c)は(b)の3C部分拡大図、(d)は(b)の3D部分拡大図である。It is a figure explaining the crushing process of a ditch | groove, (a) is a top view which shows the state in the top dead center before press processing, (b) is the 3B-3B sectional view taken on the line of (a), (c) is (B) 3C partial enlarged view, (d) is the 3D partial enlarged view of (b). 凹溝の潰し加工工程を説明する図で、(a)はプレス加工時である下死点における状態を図3(b)に対応して示した図、(b)は(a)の4B部分拡大図、(c)は(a)の4C部分拡大図である。It is a figure explaining the crushing process of a ditch | groove, (a) is the figure which showed the state in the bottom dead center at the time of press processing corresponding to FIG.3 (b), (b) is 4B part of (a) (C) is a 4C partial enlarged view of (a). 余肉の潰し加工工程を説明する図で、(a)は図3(b)に対応して示した図、(b)は(a)の5B部分拡大図、(c)は(a)の5C部分拡大図である。It is a figure explaining the crushing process process of surplus meat, (a) is the figure shown corresponding to FIG.3 (b), (b) is the 5B partial enlarged view of (a), (c) is (a). It is a 5C partial enlarged view. 余肉の潰し加工工程を説明する図で、プレス加工時である下死点における状態を図5(a)に対応して示した図である。It is a figure explaining the surplus meat crushing process process, and is the figure which showed the state in the bottom dead center at the time of press work corresponding to Fig.5 (a). 余肉の潰し加工工程を説明する図で、(a)は図6の7A部分拡大図、(b)は図6の7B部分拡大図である。FIGS. 7A and 7B are diagrams illustrating a surplus smashing process, where FIG. 7A is a partially enlarged view of FIG. 6A and FIG. 6B is a partially enlarged view of FIG. 板厚の調整加工工程を説明する図で、プレス加工前である上死点における状態を図3(b)に対応して示した図である。It is a figure explaining the board thickness adjustment processing process, and is a figure showing the state in the top dead center before press processing corresponding to Drawing 3 (b). 板厚の調整加工工程を説明する図で、図8の9A部分拡大図である。It is a figure explaining the board thickness adjustment process, and is 9A partial enlarged view of FIG. 板厚の調整加工工程を説明する図で、(a)はプレス加工時である下死点における状態を図8に対応して示した図、(b)は(a)の10B部分拡大図である。It is a figure explaining the plate thickness adjustment process, (a) is a diagram showing the state at the bottom dead center at the time of press working corresponding to FIG. 8, (b) is a 10B partial enlarged view of (a). is there. 凹溝の潰し加工工程の変形例を示す図で、(a)はプレス加工前である上死点における状態を図3(b)に対応して示した図、(b)は(a)の11B部分拡大図、(c)はプレス加工時である下死点における状態を図4(a)に対応して示した図、(d)は(c)の11D部分拡大図である。It is a figure which shows the modification of the crushing process of a ditch | groove, (a) is the figure which showed the state in the top dead center before press processing corresponding to FIG.3 (b), (b) is a figure of (a). FIG. 11C is a partially enlarged view of FIG. 11C, FIG. 4C is a view showing the state at the bottom dead center at the time of press working corresponding to FIG. 4A, and FIG.

図1ないし図10にオイルクーラー用部品20のプレス加工による製造に係る本発明の実施の形態を示す。この実施の形態において、上記オイルクーラー用部品20の製造は、2000-3000kN程度の加圧能力を備えた1台の順送型の汎用プレス機を用いてなされ、板厚5mmのアルミニウム合金の板材、より正確には、板厚に少しバラツキのある2000番台のアルミニウム合金板を被加工材1としたいわゆる板鍛造によりなされる。   FIG. 1 to FIG. 10 show an embodiment of the present invention relating to the manufacture of an oil cooler component 20 by press working. In this embodiment, the oil cooler part 20 is manufactured using a single-purpose general-purpose press machine having a pressurizing capacity of about 2000 to 3000 kN, and is made of an aluminum alloy plate having a thickness of 5 mm. More precisely, the forging is performed by so-called plate forging using a 2000 series aluminum alloy plate having a slight variation in the plate thickness as a workpiece 1.

プレス加工品としての上記オイルクーラー用部品20は、図2(a)ないし(c)に示すように、略板状をなし、図外の配管を挿入するための配管挿入孔20aの複数が中央部分に開設されるとともに、各配管挿入孔20aを囲むようにしてパッキン嵌合用の凹溝(凹部2)が凹設され、また、取り付けのためのボルト穴20bの適数が周縁部に穿孔される。上記凹溝2は長円形状をなし、凹溝2、2同士は、それぞれの直線部2a、2a同士をほぼ平行に並べた姿勢で近接配置され、これにより凹溝2、2間には薄肉部8が形成される。   As shown in FIGS. 2 (a) to 2 (c), the oil cooler part 20 as a pressed product is substantially plate-shaped, and a plurality of pipe insertion holes 20a for inserting pipes not shown in the figure are in the center. In addition to being opened in the portion, a groove for fitting packing (concave portion 2) is provided so as to surround each pipe insertion hole 20a, and an appropriate number of bolt holes 20b for attachment are drilled in the peripheral portion. The concave groove 2 has an oval shape, and the concave grooves 2 and 2 are arranged close to each other in a posture in which the linear portions 2a and 2a are arranged substantially in parallel. Part 8 is formed.

また、その製作上、設計上の要求として、上記凹溝2の肩部にはエッジのシャープさが求められるとともに、板厚に関しても高い寸法精度が要求される。なお、上記オイルクーラー用部品20の大きさは10センチ角に収まる程度であり、上記配管挿入孔20aは、ボルト穴20bよりもやや大きいサイズに形成される。   In addition, as a manufacturing and design requirement, a sharp edge is required for the shoulder portion of the concave groove 2 and a high dimensional accuracy is also required for the plate thickness. The size of the oil cooler component 20 is about 10 cm square, and the pipe insertion hole 20a is formed to be slightly larger than the bolt hole 20b.

以上のオイルクーラー用部品20の製造は、パイロット穴抜き工程(S-1)、第1の外形抜き工程(S-2)、第2の外形抜き工程(S-3)、凹溝2の潰し工程(S-4)、ダレ埋め工程(S-5)、穴抜き工程(S-6)、板厚調整工程(S-7)、シェービング加工工程(S-8)、および切り離し工程(S-9)により構成され、図1に示すように、各工程に対応してステージが設定される。上述のように完成品はあまり大きくないサイズのために、金型3は返し抜きの2個取りに設計される。なお、図1においては、被加工箇所をハッチングにより示している。   The manufacture of the oil cooler component 20 described above includes the pilot hole punching step (S-1), the first outer shape punching step (S-2), the second outer shape punching step (S-3), and the crushing of the groove 2 Step (S-4), Sagging Filling Step (S-5), Hole Drilling Step (S-6), Plate Thickness Adjustment Step (S-7), Shaving Process (S-8), and Detachment Step (S- 9). As shown in FIG. 1, a stage is set corresponding to each process. As described above, because the finished product is not so large, the mold 3 is designed to have two pieces for turning back. In addition, in FIG. 1, the to-be-processed location is shown by hatching.

上記パイロット穴抜き工程(S-1)は、図外のパイロットピンの挿入穴21を抜き加工するものであり、この挿入穴21は、ステージの4隅に配置されるものと、配管挿入孔20aの配置に合わせて形成されるものからなる。配管挿入孔20aに対応する挿入穴21は、パイロットピンの挿入に伴う歪みを考慮して配管挿入孔20aよりもひとまわり小さく形成される。   In the pilot hole punching step (S-1), a pilot pin insertion hole 21 (not shown) is punched and the insertion holes 21 are arranged at the four corners of the stage, and the pipe insertion hole 20a. It is formed according to the arrangement of. The insertion hole 21 corresponding to the pipe insertion hole 20a is formed to be slightly smaller than the pipe insertion hole 20a in consideration of distortion caused by insertion of the pilot pin.

上記第1の外形抜き工程(S-2)は、被加工材1の送り方向に対する直交方向における中心部分を、また、第2の外形抜き工程(S-3)は、その周縁部分をそれぞれブランク材22の外形形状に合わせて打抜き加工するものである。これにより被加工材1は、ブランク材22同士を連結部23、この実施の形態においては具体的にはセンターキャリアにより連結した状態にされる。なお、上記ブランク材22の外形寸法は、シェービング加工工程を考慮してプレス加工品(プレス完成品)よりもひとまわり大きく設定される。また、上記第2の外形抜き工程においては、幅広く形成された連結部23の内部を穴抜きする打抜き加工もなされる。   In the first outer shape removing step (S-2), the central portion in the direction orthogonal to the feed direction of the workpiece 1 is blanked, and in the second outer shape removing step (S-3), the peripheral portion is blanked. The punching process is performed in accordance with the outer shape of the material 22. Thereby, the workpiece 1 is brought into a state in which the blank materials 22 are connected to each other by the connecting portion 23, specifically, the center carrier in this embodiment. The external dimensions of the blank material 22 are set slightly larger than the press-processed product (press completed product) in consideration of the shaving process. Further, in the second outer shape punching process, a punching process for punching the inside of the connecting portion 23 formed widely is also performed.

上記凹溝2の潰し工程(S-4)は、上述した凹溝2を潰し加工するもので、図3(a)および(b)に示すように、凹溝2の位置、形状に合わせて金型3の上型3a(パンチ)には凸部4が突設される。また、この上型3aの凸部4の周りには、図3(c)に示すように、凸部4によって押し出された余肉6を逃がすための空隙部5が形成される。この空隙部5は、凸部4周りを全周に渡って凹設して形成され、その容積は、凹溝2の内部の容積よりもやや大きく設定される。余肉6が空隙部5へと逃げるように、金型3には、上述した凸部4や空隙部5を除いてブランク材22とほぼ同じサイズの内部空間3c(キャビティ)が形成され、言い換えればブランク材22をほぼ密閉状に包み込むようにして構成される。なお、空隙部5の底面は、余肉6の盛り上がり形状に合わせて円弧面により構成される。また、図3(b)等に示す3bは下型である。   The crushing step (S-4) of the concave groove 2 is a process for crushing the concave groove 2 described above, and as shown in FIGS. 3A and 3B, according to the position and shape of the concave groove 2. A convex portion 4 is projected from the upper die 3 a (punch) of the die 3. Further, as shown in FIG. 3 (c), a gap 5 is formed around the convex portion 4 of the upper mold 3a so as to escape the surplus portion 6 pushed out by the convex portion 4. The gap portion 5 is formed by being recessed over the entire circumference of the convex portion 4, and the volume thereof is set to be slightly larger than the volume inside the concave groove 2. An inner space 3c (cavity) having substantially the same size as the blank material 22 is formed in the mold 3 except for the above-described convex portion 4 and the gap portion 5 so that the surplus wall 6 escapes to the gap portion 5, in other words. For example, the blank material 22 is configured to be substantially sealed. In addition, the bottom surface of the gap portion 5 is configured by an arc surface in accordance with the rising shape of the surplus wall 6. Moreover, 3b shown in FIG.3 (b) etc. is a lower mold | type.

また、上記凸部4の頂部には、上述した薄肉部8への余肉6の逃がしを促す傾斜面9が形成される。図3(a)ないし(d)に示すように、凸部4は、凹部2と同様に長円形状の直線部4a同士をほぼ平行に並べた姿勢でその一対が近接配置されており、上記傾斜面9は、近接配置される直線部4aAの頂部を近接方向、すなわち外側に行くに従って漸次突出量が小さくなるように傾斜して形成される。一方、反対に凸部4において離隔配置される側の直線部4aBおよびその近傍に位置する円弧部4bの頂部は平坦面25であり、円弧部4bの残余の頂部は、近接配置される直線部4aAに近づくに従って平坦面25から上述の傾斜面9へと漸次変形するように構成される。なお、図3(a)において、凸部4の周りに記載された矢印は、傾斜面9の形成領域、平坦面25の形成領域、および平坦面25と傾斜面9との間の変形領域のそれぞれの範囲を示すものである。   In addition, an inclined surface 9 is formed on the top of the convex portion 4 to facilitate the escape of the surplus wall 6 to the thin portion 8 described above. As shown in FIGS. 3 (a) to 3 (d), the convex portions 4 are arranged close to each other in a posture in which the oval linear portions 4a are arranged substantially in parallel with each other like the concave portion 2. The inclined surface 9 is formed so that the top portion of the linear portion 4aA arranged in proximity is inclined so that the protruding amount gradually decreases in the proximity direction, that is, outward. On the other hand, the top part of the linear part 4aB on the side of the convex part 4 that is spaced apart and the arc part 4b located in the vicinity thereof is a flat surface 25, and the remaining top part of the arc part 4b is a linear part that is arranged in proximity. It is configured to gradually deform from the flat surface 25 to the above-described inclined surface 9 as it approaches 4aA. In FIG. 3A, the arrows written around the convex portion 4 indicate the formation region of the inclined surface 9, the formation region of the flat surface 25, and the deformation region between the flat surface 25 and the inclined surface 9. Each range is shown.

さらに、この実施の形態において、上記凹溝2の底面には製作上、設計上の要求として所定の表面粗さが設定されており、図3(c)に示す傾斜面9の高さ寸法hは、この表面粗さの寸法公差範囲内となるように設定される。   Furthermore, in this embodiment, a predetermined surface roughness is set on the bottom surface of the concave groove 2 as a manufacturing and design requirement, and the height dimension h of the inclined surface 9 shown in FIG. Is set to be within a dimensional tolerance range of the surface roughness.

上記ダレ埋め工程(S-5)は、上述の凹溝2の潰し工程(S-4)において発生したダレ7を塑性流動を利用して埋めることにより解消させるもので、図5(a)ないし(c)に示すように、上型3aには後述する余肉6を潰し加工するための押圧部26が形成される。また、塑性流動に伴って凹溝2が変形するおそれを防ぐために、上型3aには、上述した凸部4と同じサイズに形成されて凹溝2内に挿入、充填される押さえ部27が形成される。同様の変形を防ぐために、金型3はブランク材22の上下面にほぼ密着するように構成される。   The sagging filling step (S-5) is performed by filling the sagging 7 generated in the crushing step (S-4) of the concave groove 2 by using plastic flow. As shown in (c), the upper die 3a is formed with a pressing portion 26 for crushing and processing the surplus material 6 described later. Further, in order to prevent the possibility that the concave groove 2 is deformed with plastic flow, the upper mold 3a has a pressing portion 27 that is formed in the same size as the convex portion 4 described above and is inserted and filled in the concave groove 2. It is formed. In order to prevent the same deformation, the mold 3 is configured to be in close contact with the upper and lower surfaces of the blank material 22.

上記穴抜き工程(S-6)は、上述した配管挿入孔20aとボルト穴20bを穴抜き加工するものである。配管挿入孔20aの穴抜きは、パイロットピンの挿入穴21を下穴として、穴径を拡大するようにしてなされる。   In the hole punching step (S-6), the pipe insertion hole 20a and the bolt hole 20b described above are punched. The pipe insertion hole 20a is punched by using the pilot pin insertion hole 21 as a pilot hole so as to increase the hole diameter.

上記板厚調整工程(S-7)は、上述したように板厚のバラツキがある被加工材1を潰し加工により所定の板厚寸法t、表面粗さに矯正するもので、図8および図9に示すように、上型3aにはブランク材22の上面を全面に渡って押圧する押圧面部11が形成される。また、上型3aの周縁部には、押圧面部11による圧縮加工により押し出された余肉6'を逃がすための空隙部5'が形成され、さらに上述同様、余肉6'の塑性流動によって凹溝2が変形するおそれを防ぐために押さえ部12も形成される。   In the plate thickness adjusting step (S-7), as described above, the workpiece 1 having variations in plate thickness is corrected to a predetermined plate thickness dimension t and surface roughness by crushing. As shown in FIG. 9, the upper die 3a is formed with a pressing surface portion 11 for pressing the upper surface of the blank material 22 over the entire surface. In addition, a gap 5 ′ for escaping the surplus portion 6 ′ extruded by the compression process by the pressing surface portion 11 is formed in the peripheral portion of the upper mold 3a. Further, as described above, a concave portion is formed by plastic flow of the surplus portion 6 ′. A holding part 12 is also formed to prevent the groove 2 from being deformed.

上記シェービング加工工程(S-8)は、ブランク材22の外周縁部10を全周に渡ってシェービング加工をするものである。このシェービング加工による削り落とし寸法は、上述した空隙部5'の寸法と同じか、あるいはやや大きく設定される。以上のシェービング加工を終えたら、上記切り離し工程(S-9)において連結部23が抜かれることにより、完成品を得ることができる。   In the shaving process (S-8), the outer peripheral edge 10 of the blank material 22 is shaved over the entire circumference. The shaving-off dimension by this shaving process is set to be the same as or slightly larger than the dimension of the gap 5 ′ described above. When the above shaving process is completed, a finished product can be obtained by removing the connecting portion 23 in the disconnecting step (S-9).

したがって、被加工材1は、パイロット穴抜き工程(S-1)を経てなされる第1、第2の外形抜き工程(S-2、S3)においてブランク材22としての外形が形作られると、図3および図4に示すように、凹溝2の潰し工程(S-4)において、外形の変形を規制された上で、凸部4によって凹溝2内の肉が空隙部5内、すなわち凹溝2周りに余肉6として塑性流動させられる。この際には、凸部4間の薄肉部8への塑性流動が傾斜面9によって促され、これにより余肉6が凸部4周りにほぼ均等に逃がされる。   Therefore, when the outer shape as the blank material 22 is formed in the first and second outer shape punching steps (S-2, S3) performed through the pilot hole punching step (S-1), the workpiece 1 is shown in FIG. 3 and FIG. 4, after the deformation of the outer shape is restricted in the crushing step (S-4) of the concave groove 2, the meat in the concave groove 2 is formed in the gap portion 5, that is, the concave portion by the convex portion 4. It is made to plastically flow around the groove 2 as a surplus wall 6. At this time, the plastic flow to the thin portion 8 between the convex portions 4 is promoted by the inclined surface 9, whereby the surplus thickness 6 is released almost uniformly around the convex portion 4.

また、この凹溝2の潰し工程(S-4)において、被加工材1には、板厚方向の圧縮応力および板面方向の引張応力が凹溝2の底面側において発生するほか、凹溝2の肩部の表層側においては、凹溝2の底面に向かって巻き込む方向の引張応力が発生し、これにより肩ダレ7が生じる。なお、図4(b)および(c)に記載の2点鎖線は、凹溝2の潰し加工をする前の被加工材1の外形形状を示すものである。   Further, in the crushing step (S-4) of the concave groove 2, in the workpiece 1, compressive stress in the plate thickness direction and tensile stress in the plate surface direction are generated on the bottom side of the concave groove 2, and the concave groove On the surface layer side of the shoulder portion 2, a tensile stress is generated in the direction of winding toward the bottom surface of the groove 2, thereby causing a shoulder sag 7. Note that the two-dot chain line shown in FIGS. 4B and 4C shows the outer shape of the workpiece 1 before crushing the concave groove 2.

次のダレ埋め工程(S-5)においては、図5ないし図7に示すように、押さえ部12周りに配置される押圧部26により凹溝2周りの余肉6が潰し加工され、これにより、近傍に位置する上述の肩ダレ7を埋めるように余肉6が塑性流動する。なお、図7に示す矢印は塑性流動の方向を示すものであり、肩ダレ7を埋めた上で残った余肉6は、ブランク材22の周縁部などに適宜逃がされる。   In the next sag filling step (S-5), as shown in FIGS. 5 to 7, the surplus portion 6 around the recessed groove 2 is crushed by the pressing portion 26 arranged around the pressing portion 12, thereby The surplus wall 6 plastically flows so as to fill the shoulder sag 7 located in the vicinity. The arrows shown in FIG. 7 indicate the direction of plastic flow, and the surplus material 6 remaining after the shoulder sag 7 is filled is released as appropriate to the peripheral portion of the blank 22 and the like.

続いて、穴抜き工程(S-6)を経た上で、板厚調整工程(S-7)においては、図8ないし図10に示すように、押圧面部11によりブランク材22を上下方向に圧縮して板厚寸法tが調整される。この際に生じた余肉6'は、空隙部5'、すなわちブランク材22の周縁部へと塑性流動させられる。   Subsequently, after the punching step (S-6), in the plate thickness adjusting step (S-7), as shown in FIGS. 8 to 10, the blank material 22 is compressed in the vertical direction by the pressing surface portion 11. Thus, the plate thickness dimension t is adjusted. The excess 6 ′ generated at this time is plastically flowed to the gap 5 ′, that is, the peripheral edge of the blank 22.

この後、シェービング加工工程(S-7)において、ブランク材22の外周縁部10が削り落とされて外周縁面がきれいな剪断面にされ、また、これに伴って余肉6'も切り離される。最後に、切り離し工程(S-9)において連結部23を打ち抜けばプレス加工品を得ることができる。   Thereafter, in the shaving process (S-7), the outer peripheral edge portion 10 of the blank material 22 is scraped off to make the outer peripheral edge surface a clean shear surface, and the surplus wall 6 ′ is also cut off accordingly. Finally, if the connecting portion 23 is punched through in the separation step (S-9), a press-processed product can be obtained.

なお、以上の実施の形態においては、凹溝2の潰し工程(S-4)において外形の変形を規制する場合を示したが、余肉6の発生量に応じて、図11(a)ないし(d)に示すように金型3の周縁部に第3の空隙部5"を追加して設けることも可能である。この場合において、第3の空隙部5"に逃げた余肉6"は、シェービング加工工程(S-7)において削り落とせば足りる。また、ダレ埋め工程(S-5)において使用する金型3において、頂部が傾斜面9ではなく平坦面25である凸部4を備えて構成することも可能である。   In the above embodiment, the case where the deformation of the outer shape is restricted in the crushing step (S-4) of the concave groove 2 has been shown, but depending on the amount of surplus 6 generated, FIG. As shown in (d), it is also possible to additionally provide a third gap 5 "at the peripheral edge of the mold 3. In this case, the surplus wall 6" that has escaped into the third gap 5 ". In the shaving processing step (S-7), it is sufficient to scrape off, and in the mold 3 used in the sagging filling step (S-5), the convex portion 4 whose top portion is not the inclined surface 9 but the flat surface 25 is formed. It is also possible to provide and configure.

1 被加工材
2 凹部
3 金型
4 凸部
5、5' 空隙部
6、6' 余肉
7 ダレ
8 薄肉部
9 傾斜面
10 外周縁部
11 押圧面部
12 押さえ部
h 傾斜面の高さ方向の寸法
t 板厚寸法
DESCRIPTION OF SYMBOLS 1 Work material 2 Concave part 3 Mold 4 Protrusion part 5, 5 'Space | gap part 6, 6' Extra thickness 7 Sag 8 Thin part 9 Inclined surface 10 Outer peripheral edge 11 Pressing surface part 12 Pressing part h In the height direction of the inclined surface Dimensions t Thickness

Claims (7)

被加工材に凹部をプレス加工して製造されるプレス加工品の製造方法であって、
金型の前記凹部成型用の凸部周りに形成された空隙部内に前記凸部による被加工材の潰し加工に伴って生じる余肉を逃がした後、
前記凸部による潰し加工に伴って発生した凹部周壁のダレを前記余肉の潰し加工に伴う塑性流動によって埋めるプレス加工品の製造方法。
A method of manufacturing a press-processed product manufactured by pressing a recess on a workpiece,
After letting out the surplus generated with the crushing of the workpiece by the convex portion in the gap formed around the convex portion for molding the concave portion of the mold,
A method for manufacturing a press-processed product, wherein a sagging of a peripheral wall of a concave portion generated along with a crushing process by the convex part is filled with a plastic flow accompanying a crushing process of the surplus.
前記凹部の複数が近接配置されるとともに、各凸部の先端には、凹部間の薄肉部への余肉の逃がしを促す傾斜面が形成される請求項1記載のプレス加工品の製造方法。   The method for manufacturing a press-worked product according to claim 1, wherein a plurality of the recesses are arranged close to each other, and an inclined surface is formed at the tip of each projection so as to facilitate escape of surplus material to the thin portion between the recesses. 前記傾斜面の高さ方向の寸法が、凹部の底面に設定される表面粗さの寸法公差範囲内にされる請求項2記載のプレス加工品の製造方法。   The method for manufacturing a press-worked product according to claim 2, wherein a dimension in the height direction of the inclined surface is set within a dimensional tolerance range of a surface roughness set on a bottom surface of the recess. 前記被加工材が金属板材であり、
前記余肉の潰し加工後に、外周縁部に余肉を逃がすようにして被加工材を所定の板厚寸法になるまで潰し加工し、
次いで、前記外周縁部を剪断加工により除去する請求項1ないし3のいずれかに記載のプレス加工品の製造方法。
The workpiece is a metal plate;
After crushing the surplus, the work piece is crushed to a predetermined plate thickness so as to escape the surplus to the outer peripheral edge,
4. The method for manufacturing a press-processed product according to claim 1, wherein the outer peripheral edge is removed by shearing.
順送加工によりなされる請求項1ないし4のいずれかに記載のプレス加工品の製造方法。   The manufacturing method of the press-worked product according to any one of claims 1 to 4, which is performed by progressive processing. 略板状の被加工材をプレス加工して製造されるプレス加工品の製造方法であって、
金型に形成された板厚調整用の押圧面部により被加工材を所定の板厚寸法に潰し加工するとともに、該潰し加工に伴って発生する余肉を前記金型の外周縁部に形成された空隙部内に逃がした後、
被加工材の外周縁部を前記余肉とともに剪断加工により除去するプレス加工品の製造方法。
A method of manufacturing a press-processed product manufactured by pressing a substantially plate-shaped workpiece,
The work piece is crushed to a predetermined plate thickness by a plate thickness adjustment pressing surface formed on the mold, and surplus material generated by the crushing process is formed on the outer peripheral edge of the mold. After escaping into the gap
A method for manufacturing a press-processed product, in which an outer peripheral edge of a workpiece is removed together with the surplus by shearing.
被加工材に形成された凹部内に挿入、充填される押さえ部を金型に備え、前記潰し加工に際して余肉の凹部内への塑性流動が押さえ部により規制される請求項6記載のプレス加工品の製造方法。   The press working according to claim 6, wherein a pressing part to be inserted and filled in a recess formed in the workpiece is provided in the mold, and the plastic flow into the recess is restricted by the pressing part during the crushing process. Product manufacturing method.
JP2016247689A 2016-12-21 2016-12-21 Manufacturing method of pressed article Pending JP2018099715A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06179033A (en) * 1991-06-27 1994-06-28 Aida Eng Ltd Annular groove deformation processing method and using die in this method
JP2000140977A (en) * 1998-11-04 2000-05-23 Sony Corp Pressed article, electrode of electron gun, and press forming method
JP2002124609A (en) * 2000-10-17 2002-04-26 Sanko:Kk Method for manufacturing heat spreader
JP2006351234A (en) * 2005-06-13 2006-12-28 Fuji Hatsujo Kk Sealing plate for sealed battery, metal mold for manufacturing it and its manufacturing method
JP2007167886A (en) * 2005-12-21 2007-07-05 Topre Corp Method for forming metallic sheet
JP2011154957A (en) * 2010-01-28 2011-08-11 Fuji Hatsujo Kk Sealing plate for battery, method and metal mold for manufacturing the same
JP2015223610A (en) * 2014-05-28 2015-12-14 Jfeスチール株式会社 Press molding method for plate having groove shape part

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06179033A (en) * 1991-06-27 1994-06-28 Aida Eng Ltd Annular groove deformation processing method and using die in this method
JP2000140977A (en) * 1998-11-04 2000-05-23 Sony Corp Pressed article, electrode of electron gun, and press forming method
JP2002124609A (en) * 2000-10-17 2002-04-26 Sanko:Kk Method for manufacturing heat spreader
JP2006351234A (en) * 2005-06-13 2006-12-28 Fuji Hatsujo Kk Sealing plate for sealed battery, metal mold for manufacturing it and its manufacturing method
JP2007167886A (en) * 2005-12-21 2007-07-05 Topre Corp Method for forming metallic sheet
JP2011154957A (en) * 2010-01-28 2011-08-11 Fuji Hatsujo Kk Sealing plate for battery, method and metal mold for manufacturing the same
JP2015223610A (en) * 2014-05-28 2015-12-14 Jfeスチール株式会社 Press molding method for plate having groove shape part

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