JP2013202666A - Unbending tool for plate bending device - Google Patents

Unbending tool for plate bending device Download PDF

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JP2013202666A
JP2013202666A JP2012075575A JP2012075575A JP2013202666A JP 2013202666 A JP2013202666 A JP 2013202666A JP 2012075575 A JP2012075575 A JP 2012075575A JP 2012075575 A JP2012075575 A JP 2012075575A JP 2013202666 A JP2013202666 A JP 2013202666A
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plate
plate material
return member
bending
mold
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Hideaki Takahashi
英明 高橋
Shigeki Noguchi
茂樹 野口
Noriki Sugawara
紀輝 菅原
Garyo Kubo
雅亮 久保
Noritada Kodan
規禎 小段
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Amada Co Ltd
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Amada Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an unbending tool for a plate bending device capable of easily unbending a plate excessively bent.SOLUTION: A plate bending device includes an upper table, an upper die 5, a lower table, and a lower die 9, wherein a plate 11 is disposed between the upper die 5 and the lower die 9, and by moving the upper table relative to the lower table, the plate 11 is bent by the upper die 5 and the lower die 9. An unbending tool 1 for the plate bending device is used for the plate bending device and unbends a processed portion 15 of the plate 11 excessively bent. It includes an upper returning member 17 which is disposed at the upper die 5 and pressurizes an obtuse angle side of the processed portion 15 of the plate 11 by moving the upper table and a lower returning member 19 which is disposed at the lower die 9 so as to be positioned on an acute angle side of the processed portion 15 of the plate 11 and unbends the processed portion 15 by pressurizing the processed portion 15 by means of the upper returning member 17.

Description

本発明は、板材曲げ加工装置用曲げ戻し加工具に関する。   The present invention relates to a bending return tool for a plate material bending apparatus.

従来、板材曲げ加工装置としては、上部テーブルと、この上部テーブルに固定された上型と、上部テーブルに対向して配置された下部テーブルと、この下部テーブルに固定された下型とを備えたものが知られている（例えば、特許文献１参照）。   Conventionally, as a plate material bending apparatus, an upper table, an upper mold fixed to the upper table, a lower table arranged to face the upper table, and a lower mold fixed to the lower table are provided. Those are known (for example, see Patent Document 1).

この板材曲げ加工装置では、上型と下型との間に板材を配置させ、上部テーブルを下部テーブルに対して相対的に移動させることにより上型と下型とで板材を曲げ加工している。   In this plate material bending apparatus, a plate material is disposed between an upper die and a lower die, and the upper table is moved relative to the lower table to bend the plate material between the upper die and the lower die. .

ところで、このような板材曲げ加工装置によって過度に曲げ加工された板材は、被加工部の鋭角側に治具を配置させ、この治具を金槌などによって被加工部を開くように叩くことにより被加工部の曲げ戻しを行っている。   By the way, a plate material that has been excessively bent by such a plate material bending apparatus is arranged by placing a jig on the acute angle side of the processed portion and hitting the jig so as to open the processed portion with a hammer or the like. The processed part is bent back.

特開平８−３３９２２号公報JP-A-8-33992

しかしながら、上記のような治具を用いた板材の曲げ戻しでは、板材の板厚が厚いものや抗張力の高い材質になるほど大きな荷重が必要となり、曲げ戻しを容易に行うことができなかった。   However, in the bending back of the plate material using the jig as described above, a larger load is required as the plate thickness becomes thicker or the material having higher tensile strength, and the bending back cannot be easily performed.

そこで、この発明は、過度に曲げ加工された板材を容易に曲げ戻すことができる板材曲げ加工装置用曲げ戻し加工具の提供を目的としている。   Accordingly, an object of the present invention is to provide a bending return tool for a plate bending apparatus that can easily bend the plate that has been excessively bent.

請求項１記載の発明は、上部テーブルと、この上部テーブルに固定された上型と、前記上部テーブルに対向して配置された下部テーブルと、この下部テーブルに固定された下型とを備え、前記上型と前記下型との間に板材を配置させ、前記上部テーブルを前記下部テーブルに対して相対的に移動させることにより前記上型と前記下型とで前記板材を曲げ加工する板材曲げ加工装置に用いられ、過度に曲げ加工された前記板材の被加工部を曲げ戻しさせる板材曲げ加工装置用曲げ戻し加工具であって、前記上型に配置され、前記上部テーブルの移動により前記板材の被加工部の鈍角側を押圧する上部戻し部材と、前記下型に配置されて前記板材の被加工部の鋭角側に位置され、前記上部戻し部材の前記被加工部の押圧により前記被加工部を曲げ戻しする下部戻し部材とを有することを特徴とする。   The invention according to claim 1 comprises an upper table, an upper mold fixed to the upper table, a lower table disposed opposite to the upper table, and a lower mold fixed to the lower table, Plate material bending in which a plate material is disposed between the upper mold and the lower mold and the upper table is moved relative to the lower table to bend the plate material between the upper mold and the lower mold. A bending apparatus for a plate bending apparatus, which is used in a processing apparatus and bends back a processed portion of the plate that has been excessively bent, and is disposed on the upper mold and moved by moving the upper table. An upper return member that presses the obtuse angle side of the processed portion of the plate, and an upper return member that is disposed on the lower mold and is positioned on the acute angle side of the processed portion of the plate material, and is pressed by the processed portion of the upper return member Bending part Then you and having a lower return member.

この板材曲げ加工装置用曲げ戻し加工具では、過度に曲げ加工された板材の曲げ戻しを行う際に、上型と下型とに上部戻し部材と下部戻し部材とを配置させればよいので、上型と下型とを交換する作業を必要とすることがなく、過度に曲げ加工された板材の曲げ戻しを容易に行うことができる。   In this plate material bending apparatus bending return tool, when performing bending back of an excessively bent plate material, an upper return member and a lower return member may be disposed on the upper mold and the lower mold. The work of exchanging the upper mold and the lower mold is not required, and the bending of the excessively bent plate material can be easily performed.

また、板材曲げ加工装置を用いて過度に曲げ加工された板材の曲げ戻しを行うので、板厚が厚いものや抗張力の高い材質など曲げ戻しの際に大きな荷重を必要とする板材を容易に曲げ戻すことができる。   In addition, because the plate material that has been excessively bent using the plate material bending device is bent back, it is easy to bend a plate material that requires a large load during bending back, such as a thick plate or a material with high tensile strength. Can be returned.

従って、このような板材曲げ加工装置用曲げ戻し加工具では、上型と下型とを交換する作業を必要とすることがないと共に、曲げ戻しの際に大きな荷重を得ることができるので、過度に曲げ加工された板材を容易に曲げ戻すことができる。   Therefore, in such a bending return tool for a plate material bending apparatus, an operation for exchanging the upper mold and the lower mold is not required, and a large load can be obtained at the time of bending return. It is possible to easily bend back the plate material that has been bent into a shape.

請求項２記載の発明は、請求項１記載の板材曲げ加工装置用曲げ戻し加工具であって、前記上部戻し部材は、矩形状に形成され、前記下部戻し部材は、円柱状に形成されていることを特徴とする。   Invention of Claim 2 is the bending return tool for board | plate material bending apparatuses of Claim 1, Comprising: The said upper return member is formed in a rectangular shape, The said lower return member is formed in the column shape. It is characterized by being.

この板材曲げ加工装置用曲げ戻し加工具では、上部戻し部材が矩形状に形成され、下部戻し部材が円柱状に形成されているので、上部戻し部材と下部戻し部材の形状が複雑化することがなく、上部戻し部材と下部戻し部材の形状を簡素化することができる。   In this plate material bending apparatus bending return tool, the upper return member is formed in a rectangular shape and the lower return member is formed in a columnar shape, which may complicate the shapes of the upper return member and the lower return member. However, the shapes of the upper return member and the lower return member can be simplified.

本発明によれば、過度に曲げ加工された板材を容易に曲げ戻すことができる板材曲げ加工装置用曲げ戻し加工具を提供することができるという効果を奏する。   According to the present invention, there is an effect that it is possible to provide a bending return tool for a plate material bending apparatus that can easily bend back a plate material that has been excessively bent.

本発明の実施の形態に係る板材曲げ加工装置の概略図である。It is the schematic of the board | plate material bending processing apparatus which concerns on embodiment of this invention. 本発明の実施の形態に係る板材曲げ加工装置用曲げ戻し加工具の側面図である。It is a side view of the bending return tool for board | plate material bending apparatuses which concerns on embodiment of this invention. （ａ）は本発明の実施の形態に係る板材曲げ加工装置用曲げ戻し加工具に過度に曲げ加工された板材を配置したときの側面図である。（ｂ）は本発明の実施の形態に係る板材曲げ加工装置用曲げ戻し加工具によって板材を曲げ戻したときの側面図である。(A) is a side view when the excessively bent board | plate material is arrange | positioned to the bending return processing tool for plate | board bending apparatuses based on embodiment of this invention. (B) is a side view when a board | plate material is bent back by the bending back processing tool for board | plate material bending processing apparatuses which concerns on embodiment of this invention.

図１〜図３を用いて本発明の実施の形態に係る板材曲げ加工装置用曲げ戻し加工具について説明する。   A bending tool for a plate bending apparatus according to an embodiment of the present invention will be described with reference to FIGS.

本実施の形態に係る板材曲げ加工装置用曲げ戻し加工具１は、上部テーブル３と、この上部テーブル３に固定された上型５と、上部テーブル３に対向して配置された下部テーブル７と、この下部テーブル７に固定された下型９とを備え、上型５と下型９との間に板材１１を配置させ、上部テーブル３を下部テーブル７に対して相対的に移動させることにより上型５と下型９とで板材１１を曲げ加工する板材曲げ加工装置１３に用いられ、過度に曲げ加工された板材１１の被加工部１５を曲げ戻しさせる。   A plate material bending apparatus bending return tool 1 according to the present embodiment includes an upper table 3, an upper mold 5 fixed to the upper table 3, and a lower table 7 disposed to face the upper table 3. A lower die 9 fixed to the lower table 7, a plate material 11 is disposed between the upper die 5 and the lower die 9, and the upper table 3 is moved relative to the lower table 7. It is used in a plate material bending apparatus 13 that bends the plate material 11 with the upper mold 5 and the lower mold 9 and bends back the processed portion 15 of the plate material 11 that has been excessively bent.

そして、上型５に配置され、上部テーブル３の移動により板材１１の被加工部１５の鈍角側を押圧する上部戻し部材１７と、下型９に配置されて板材１１の被加工部１５の鋭角側に位置され、上部戻し部材１７の被加工部１５の押圧により被加工部１５を曲げ戻しする下部戻し部材１９とを有する。   Then, an upper return member 17 that is disposed on the upper mold 5 and presses the obtuse angle side of the processed portion 15 of the plate material 11 by the movement of the upper table 3, and an acute angle of the processed portion 15 of the plate material 11 that is disposed on the lower mold 9. And a lower return member 19 that is positioned on the side and that bends back the processed portion 15 by pressing the processed portion 15 of the upper return member 17.

また、上部戻し部材１７は、矩形状に形成され、下部戻し部材１９は、円柱状に形成されている。   The upper return member 17 is formed in a rectangular shape, and the lower return member 19 is formed in a columnar shape.

図１に示すように、板材曲げ加工装置１３は、上部テーブル３と、上型５と、下部テーブル７と、下型９とを備えている。   As shown in FIG. 1, the plate material bending apparatus 13 includes an upper table 3, an upper mold 5, a lower table 7, and a lower mold 9.

上部テーブル３は、下部テーブル７の上方に下部テーブル７から離間して配置され、電動モータなどを有する駆動機構（不図示）に接続されて下部テーブル７に対して昇降可能とされている。この上部テーブル３には、ボルトなどの固定手段（不図示）によって上型ホルダ（不図示）が固定されており、この上型ホルダを介して上型５が上部テーブル３と一体的に配置されている。   The upper table 3 is disposed above the lower table 7 so as to be separated from the lower table 7 and is connected to a drive mechanism (not shown) having an electric motor or the like so as to be movable up and down with respect to the lower table 7. An upper mold holder (not shown) is fixed to the upper table 3 by fixing means (not shown) such as bolts, and the upper mold 5 is disposed integrally with the upper table 3 via the upper mold holder. ing.

図１〜図３に示すように、上型５は、直方体状に形成され、上型ホルダとの間にそれぞれ凹凸形状の係合部（不図示）が形成されて上型ホルダの側面からスライド式に組付けられ、ボルトなどの固定手段（不図示）によって上型ホルダに固定される。   As shown in FIGS. 1 to 3, the upper die 5 is formed in a rectangular parallelepiped shape, and concave and convex engaging portions (not shown) are respectively formed between the upper die holder and slide from the side surface of the upper die holder. And is fixed to the upper mold holder by fixing means (not shown) such as a bolt.

この上型５の下型９側の端面には、Ｖ字状に形成された加工部２１が設けられている。この加工部２１は、上部テーブル３の下降によって板材１１を押圧し、板材１１を曲げ加工するパンチとなっている。この上型５の下方には、下部テーブル７が設置されている。   On the end surface of the upper mold 5 on the lower mold 9 side, a processed portion 21 formed in a V shape is provided. The processing portion 21 is a punch that presses the plate material 11 by lowering the upper table 3 and bends the plate material 11. A lower table 7 is installed below the upper mold 5.

下部テーブル７は、上部テーブル３及び上型５の下方に上部テーブル３及び上型５から離間して配置されている。この下部テーブル７には、ボルトなどの固定手段（不図示）によって下型ホルダ（不図示）が固定されており、この下型ホルダを介して下型９が下部テーブル７と一体的に配置されている。   The lower table 7 is disposed below the upper table 3 and the upper mold 5 so as to be separated from the upper table 3 and the upper mold 5. A lower mold holder (not shown) is fixed to the lower table 7 by fixing means (not shown) such as bolts, and the lower mold 9 is disposed integrally with the lower table 7 via the lower mold holder. ing.

下型９は、直方体状に形成され、下型ホルダとの間にそれぞれ凹凸形状の係合部（不図示）が形成されて下型ホルダの側面からスライド式に組付けられ、ボルトなどの固定手段（不図示）によって下型ホルダに固定される。   The lower die 9 is formed in a rectangular parallelepiped shape, and concave and convex engaging portions (not shown) are formed between the lower die 9 and the lower die holder. The lower die 9 is slidably assembled from the side of the lower die holder, and fixed with bolts or the like. It is fixed to the lower mold holder by means (not shown).

この下型９の上型５側の端面には、板材１１を所定角度曲げ加工するために設定されたＶ溝２３が形成されている。このＶ溝２３は、上型５の加工部２１とで板材１１を挟み込んで押圧（加圧）して曲げ加工するダイとなっている。   On the end face of the lower mold 9 on the upper mold 5 side, a V-groove 23 set to bend the plate material 11 by a predetermined angle is formed. The V-groove 23 is a die that is bent by pressing (pressing) the plate material 11 between the processed portion 21 of the upper die 5.

このような板材曲げ加工装置１３によって曲げ加工されるワークとしての板材１１は、鋼などからなり、被加工部１５が所定角度以上曲げ加工されてしまうことがある。この過度に曲げ加工された板材１１は、上部戻し部材１７と下部戻し部材１９とによって曲げ戻しされる。   The plate material 11 as a workpiece to be bent by such a plate material bending apparatus 13 is made of steel or the like, and the workpiece 15 may be bent by a predetermined angle or more. The excessively bent plate member 11 is bent back by the upper return member 17 and the lower return member 19.

上部戻し部材１７は、矩形状に形成され、上型５側の端面に上型５の加工部２１と同一形状となる係合溝２５が設けられている。この上部戻し部材１７は、係合溝２５を上型５の加工部２１に係合させることによって上型５に一体的に配置される。なお、係合溝２５と加工部２１との間に凹凸形状の係合部を形成して上型５に上部戻し部材１７を固定する、もしくは上部戻し部材１７を磁石などで形成し磁力によって上型５に上部戻し部材１７を固定するなどして、上部戻し部材１７は上型５からの脱落が防止されている。   The upper return member 17 is formed in a rectangular shape, and an engagement groove 25 having the same shape as the processed portion 21 of the upper mold 5 is provided on the end surface on the upper mold 5 side. The upper return member 17 is disposed integrally with the upper die 5 by engaging the engaging groove 25 with the processed portion 21 of the upper die 5. An uneven engagement portion is formed between the engagement groove 25 and the processed portion 21, and the upper return member 17 is fixed to the upper mold 5, or the upper return member 17 is formed of a magnet or the like and is The upper return member 17 is prevented from falling off the upper die 5 by fixing the upper return member 17 to the die 5.

このような上部戻し部材１７は、過度に曲げ加工された板材１１の被加工部１５の鈍角側に位置され、上部テーブル３の下降によって被加工部１５側の押圧面２７が被加工部１５の鈍角側を押圧（加圧）する。この上部戻し部材１７の下方には、下部戻し部材１９が位置される。   Such an upper return member 17 is positioned on the obtuse angle side of the processed portion 15 of the plate material 11 that has been bent excessively, and the pressing surface 27 on the processed portion 15 side of the processed portion 15 is lowered by the lowering of the upper table 3. Press (pressurize) the obtuse angle side. A lower return member 19 is positioned below the upper return member 17.

下部戻し部材１９は、円柱状に形成され、下型９側が下型９のＶ溝２３内に配置される。この下部戻し部材１９の上部戻し部材１７側には、過度に曲げ加工された板材１１の被加工部１５の鋭角側が位置される。   The lower return member 19 is formed in a columnar shape, and the lower mold 9 side is disposed in the V groove 23 of the lower mold 9. On the upper return member 17 side of the lower return member 19, the acute angle side of the processed portion 15 of the plate material 11 that has been excessively bent is positioned.

このような下部戻し部材１９は、上部戻し部材１７の板材１１の被加工部１５の鈍角側の押圧により被加工部１５の鋭角側を曲面に沿って開かせ、過度に曲げ加工された板材１１の曲げ戻しを行う。   Such a lower return member 19 opens the acute angle side of the processed portion 15 along the curved surface by pressing on the obtuse angle side of the processed portion 15 of the plate material 11 of the upper return member 17, and is excessively bent. Bend back.

ここで、このような板材曲げ加工装置用曲げ戻し加工具１による過度に曲げ加工された板材１１の曲げ戻し方法は、まず、上部戻し部材１７と下部戻し部材１９とをそれぞれ上型５と下型９とに配置させる。次に、下部戻し部材１９上に、過度に曲げ加工された板材１１の被加工部１５の鋭角側を配置させる。そして、上部テーブル３を下降させ、上部戻し部材１７で被加工部１５の鈍角側を押圧し、下部戻し部材１９によって被加工部１５の鋭角側を拡開させ、板材１１の曲げ戻しを行う。   Here, in the bending return method of the plate material 11 that has been excessively bent by the bending return tool 1 for the plate material bending apparatus, first, the upper return member 17 and the lower return member 19 are respectively connected to the upper die 5 and the lower return member 19. Placed on mold 9. Next, the acute angle side of the processed portion 15 of the plate 11 that has been excessively bent is disposed on the lower return member 19. Then, the upper table 3 is lowered, the obtuse angle side of the workpiece 15 is pressed by the upper return member 17, the acute angle side of the workpiece 15 is expanded by the lower return member 19, and the plate material 11 is bent back.

このような板材曲げ加工装置用曲げ戻し加工具１では、過度に曲げ加工された板材１１の曲げ戻しを行う際に、上型５と下型９とに上部戻し部材１７と下部戻し部材１９とを配置させればよいので、上型５と下型９とを交換する作業を必要とすることがなく、過度に曲げ加工された板材１１の曲げ戻しを容易に行うことができる。   In such a bending return tool 1 for a plate material bending apparatus, when the plate material 11 that has been bent excessively is bent back, an upper return member 17 and a lower return member 19 are provided on the upper die 5 and the lower die 9. Therefore, the work of exchanging the upper mold 5 and the lower mold 9 is not required, and the plate material 11 that has been excessively bent can be easily bent back.

また、板材曲げ加工装置１３を用いて過度に曲げ加工された板材１１の曲げ戻しを行うので、板厚が厚いものや抗張力の高い材質など曲げ戻しの際に大きな荷重を必要とする板材１１を容易に曲げ戻すことができる。   Further, since the plate material 11 that has been excessively bent using the plate material bending apparatus 13 is bent back, the plate material 11 that requires a large load during bending back such as a thick plate or a material with high tensile strength is used. Can be bent back easily.

従って、このような板材曲げ加工装置用曲げ戻し加工具１では、上型５と下型９とを交換する作業を必要とすることがないと共に、曲げ戻しの際に大きな荷重を得ることができるので、過度に曲げ加工された板材１１を容易に曲げ戻すことができる。   Therefore, in such a bending return tool 1 for a plate material bending apparatus, there is no need to replace the upper mold 5 and the lower mold 9, and a large load can be obtained at the time of bending return. Therefore, the plate material 11 that has been excessively bent can be easily bent back.

また、上部戻し部材１７は矩形状に形成され、下部戻し部材１９は円柱状に形成されているので、上部戻し部材１７と下部戻し部材１９の形状が複雑化することがなく、上部戻し部材１７と下部戻し部材１９の形状を簡素化することができる。   Further, since the upper return member 17 is formed in a rectangular shape and the lower return member 19 is formed in a cylindrical shape, the shapes of the upper return member 17 and the lower return member 19 are not complicated, and the upper return member 17 is not complicated. And the shape of the lower return member 19 can be simplified.

なお、本発明の実施の形態に係る板材曲げ加工装置用曲げ戻し加工具では、上部戻し部材が矩形状に形成され、下部戻し部材が円柱状に形成されているが、これに限らず、上型と下型とに対して取り外し可能で、板材曲げ加工装置を用いて過度に曲げ加工された板材の曲げ戻しを行える形状であれば、上部戻し部材と下部戻し部材の形状はどのような形状であってもよい。   In the bending return tool for a plate material bending apparatus according to the embodiment of the present invention, the upper return member is formed in a rectangular shape and the lower return member is formed in a cylindrical shape. What is the shape of the upper return member and the lower return member as long as it can be removed from the mold and the lower mold and can be bent back to an excessively bent plate using a plate bending apparatus It may be.

１…板材曲げ加工装置用曲げ戻し加工具
３…上部テーブル
５…上型
７…下部テーブル
９…下型
１１…板材
１３…板材曲げ加工装置
１５…被加工部
１７…上部戻し部材
１９…下部戻し部材 DESCRIPTION OF SYMBOLS 1 ... Bending return tool for plate material bending processing apparatuses 3 ... Upper table 5 ... Upper mold 7 ... Lower table 9 ... Lower mold 11 ... Plate material 13 ... Plate material bending apparatus 15 ... Processed part 17 ... Upper return member 19 ... Lower return Element

Claims (2)

上部テーブルと、この上部テーブルに固定された上型と、前記上部テーブルに対向して配置された下部テーブルと、この下部テーブルに固定された下型とを備え、前記上型と前記下型との間に板材を配置させ、前記上部テーブルを前記下部テーブルに対して相対的に移動させることにより前記上型と前記下型とで前記板材を曲げ加工する板材曲げ加工装置に用いられ、過度に曲げ加工された前記板材の被加工部を曲げ戻しさせる板材曲げ加工装置用曲げ戻し加工具であって、
前記上型に配置され、前記上部テーブルの移動により前記板材の被加工部の鈍角側を押圧する上部戻し部材と、前記下型に配置されて前記板材の被加工部の鋭角側に位置され、前記上部戻し部材の前記被加工部の押圧により前記被加工部を曲げ戻しする下部戻し部材とを有することを特徴とする板材曲げ加工装置用曲げ戻し加工具。 An upper table, an upper mold fixed to the upper table, a lower table disposed opposite to the upper table, and a lower mold fixed to the lower table, the upper mold and the lower mold, Is used in a plate bending apparatus that bends the plate with the upper mold and the lower mold by moving the upper table relative to the lower table. A bending back tool for a plate bending apparatus for bending back a processed portion of the bent plate,
An upper return member that is disposed on the upper mold and that presses an obtuse angle side of the processed portion of the plate material by movement of the upper table, and is positioned on the acute angle side of the processed portion of the plate material that is disposed on the lower mold, A bending return tool for a plate bending apparatus, comprising: a lower return member that bends back the processed portion by pressing the processed portion of the upper return member. 請求項１記載の板材曲げ加工装置用曲げ戻し加工具であって、
前記上部戻し部材は、矩形状に形成され、前記下部戻し部材は、円柱状に形成されていることを特徴とする板材曲げ加工装置用曲げ戻し加工具。 A bending return tool for a plate bending apparatus according to claim 1,
The upper return member is formed in a rectangular shape, and the lower return member is formed in a columnar shape.
JP2012075575A 2012-03-29 2012-03-29 Unbending tool for plate bending device Pending JP2013202666A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107838237A (en) * 2017-11-22 2018-03-27 五冶集团上海有限公司 A kind of steel plate bending frock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107838237A (en) * 2017-11-22 2018-03-27 五冶集团上海有限公司 A kind of steel plate bending frock

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