JPS642452B2 - - Google Patents

Info

Publication number
JPS642452B2
JPS642452B2 JP56195815A JP19581581A JPS642452B2 JP S642452 B2 JPS642452 B2 JP S642452B2 JP 56195815 A JP56195815 A JP 56195815A JP 19581581 A JP19581581 A JP 19581581A JP S642452 B2 JPS642452 B2 JP S642452B2
Authority
JP
Japan
Prior art keywords
bending
material plate
punch
lower die
folding
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
JP56195815A
Other languages
Japanese (ja)
Other versions
JPS5897430A (en
Inventor
Tsutae Fujii
Haruo Fujiwara
Akira Takai
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.)
Toyota Industries Corp
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Toyoda Jidoshokki Seisakusho KK
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 Toyota Motor Corp, Toyoda Jidoshokki Seisakusho KK filed Critical Toyota Motor Corp
Priority to JP56195815A priority Critical patent/JPS5897430A/en
Publication of JPS5897430A publication Critical patent/JPS5897430A/en
Publication of JPS642452B2 publication Critical patent/JPS642452B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • B21D22/22Deep-drawing with devices for holding the edge of the blanks

Description

【発明の詳細な説明】 この発明は絞り成形法に関し、より詳しくはコ
字状断面となるよう下面側に折り曲げる折り曲げ
と、その折り曲げの際の二本の折り曲げ線を結ぶ
ようこれらの折り曲げ線に直交する折り返し曲げ
線に沿つてコ字状断面部分を上面側に反るよう曲
げる折り返し曲げとを施して得る製品、例えば連
続する箱形断面(以下ハツト断面という)で部分
的に鞍形凸形状(以下単に鞍形状という)を有す
る製品をプレス成形する絞り成形法に関するもの
である。
[Detailed Description of the Invention] The present invention relates to a drawing method, and more specifically, to a drawing method, and more specifically, to bending to the bottom side so as to have a U-shaped cross section, and to connect the two bending lines at the time of the bending. A product obtained by bending a U-shaped cross section upward along orthogonal folding lines, such as a continuous box-shaped cross section (hereinafter referred to as a "hat cross section") with a partially saddle-shaped convex shape. The present invention relates to a drawing method for press forming a product having a saddle shape (hereinafter simply referred to as a saddle shape).

例えば第1図に示すように連続するハツト断面
で部分的に鞍形状とした製品を絞り成形する方法
として、鞍形状の部分の中央で左右に2分割し、
あるいは鞍形状の部分を別部品として3分割し、
各分割片を個別に絞り成形する分割方式の方法
や、第1段絞りで大きな曲げ半径に絞り、第2段
絞りで最終製品の形状にまで絞る方法、あるいは
段絞り成形さらにはダブルアクシヨンによる絞り
成形法等の一体方式の方法が従来知られている。
しかしながら、上述した分割方式では、金型数の
増加やそれに伴う型製作費の増加、また部品数が
増加することに伴う溶接工程の増加、さらには溶
接工程が増加することによる作業スペースや設備
費の増大等製品コストの高騰を招来する要因が多
い問題があり、また上述した従来の一体方式の方
法では、絞り成形性の向上を目的として段絞り形
状などを用いるために材料の歩留りが低下するば
かりか、シワや伸び割れが生じ易く、所期の製品
を得にくいなどの問題があつた。
For example, as shown in Figure 1, a method for drawing a partially saddle-shaped product with a continuous cross section is to divide the saddle-shaped part into two left and right parts at the center.
Alternatively, divide the saddle-shaped part into three separate parts,
There is a split method in which each divided piece is individually drawn, a method in which the first stage is drawn to a large bending radius and a second stage is drawn to the shape of the final product, or step drawing and double-action methods. One-piece methods such as drawing methods are known in the art.
However, with the above-mentioned splitting method, there is an increase in the number of molds and the resulting increase in mold manufacturing costs, an increase in the welding process due to the increase in the number of parts, and furthermore, an increase in the work space and equipment costs due to the increase in the welding process. There are many problems that lead to a rise in product costs, such as an increase in In addition, there were problems such as wrinkles and stretch cracks easily occurring, making it difficult to obtain the desired product.

この発明は上記の事情に鑑みてなされたもの
で、一体方式でかつシングルアクシヨンプレス加
工するにあたつてシワや伸び割れを生じさせるこ
となく成形することのできる絞り成形法を提供す
ることを目的とするものであり、その特徴とする
ところは、絞り成形する製品のうちコ字状断面に
成形する下面側への折り曲げとそのコ字状断面部
分を前記折り曲げの際の二本の折り曲げ線に直交
する線に沿つて上面側に反り返らせた形状に成形
する折り返し曲げとを施す箇所に、該箇所を下型
ポンチに当接させて成形するに先立つて膨出部を
形成し、前記の箇所を下型ポンチに当接させて成
形する際に前記膨出部を併せて引き伸ばし、もつ
て伸びあるいは圧縮もしくはこれらのアンバラン
スによるシワや伸び割れの発生を防止するように
した点にある。
This invention was made in view of the above circumstances, and an object of the present invention is to provide a drawing method that can perform forming without causing wrinkles or elongation cracks during integral single-action press processing. The purpose of this product is to bend the product to be drawn and formed into a U-shaped cross section toward the bottom side, and to bend the U-shaped cross section along two bending lines during the bending process. A bulging portion is formed at the location where the bending is to be performed to form a shape that is curved back to the upper surface side along a line perpendicular to When molding is carried out by bringing the part into contact with the lower die punch, the bulging part is also stretched, thereby preventing wrinkles and stretch cracks due to elongation or compression, or an imbalance thereof. .

すなわち、例えば第1図に示す形状の製品1を
シングルアクシヨンプレス加工により1回で製品
の全形状を絞り成形する場合、絞り成形を容易に
するために、下型ポンチ形状に対しシワ押え面2
をなだらかな曲面形状にするのが通常であるが、
シワ押え面と下型ポンチの当るタイミングが異な
ることから、タイミングの早い部分から遅い部分
に材料が寄せられて第2図に斜線を付して示す箇
所にシワが発生してしまう。そこでこの発明では
シワの発生し易い箇所の近傍、第2図では鞍形状
をなす部分の頂上面3に続く傾斜面4からその下
端側の平坦面5にかかる部分に、素材(材料板)
を圧下して成形を開始すると同時もしくは若干先
行して膨出部を形成し、そして最終的にはその膨
出部を引き伸ばすことによりシワを吸収するよう
にしたのである。換言すれば、前記膨出部を伸び
代として機能させることにより、成形末期におけ
る前記傾斜面4や平坦面5あるいはその近傍にお
ける伸びや圧縮を容易ならしめ、もつて伸びと圧
縮をバランスさせてシワの発生や伸び割れを防止
するようにしたのである。
That is, for example, when drawing the entire shape of the product 1 shown in FIG. 2
It is normal to have a gently curved shape, but
Since the timing at which the wrinkle pressing surface and the lower die punch hit is different, the material is gathered from the earlier timing to the later timing, and wrinkles are generated in the shaded areas in FIG. 2. Therefore, in the present invention, a material (material board) is placed near the area where wrinkles are likely to occur, in the area extending from the slope 4 following the top surface 3 of the saddle-shaped portion in FIG. 2 to the flat surface 5 on the lower end side.
A bulge was formed at the same time or slightly before the molding was started by rolling down the material, and the wrinkles were eventually absorbed by stretching the bulge. In other words, by making the bulge function as an elongation allowance, elongation and compression at or near the inclined surface 4 and flat surface 5 at the final stage of molding are facilitated, thereby balancing elongation and compression and eliminating wrinkles. This prevents the occurrence of cracks and stretching cracks.

以下この発明を第1図に示す製品を絞り成形す
る場合を例にとつてより詳細に説明する。まず、
使用する金型について説明すると、第3図は金型
の長手方向における半分を省略した断面図であ
り、また第4図は上型ダイスを上限まで引き上げ
た状態における第3図の―線に沿う断面図で
あつて、下型本体10上に設けられた下型ポンチ
11の上面は製品1と同形状に形成され、また上
型ダイス12は下型ポンチ11の上面に対応する
形状の凹部13を有し、下型ポンチ11に対して
上下動し得るよう構成されている。前記下型ポン
チ11の外周には、クツシヨンピン14を介して
ダイクシヨン(図示せず)により押し上げられた
ロアブランクホルダー15が配置され、その上面
が下型シワ押え面16とされるとともに、その下
型シワ押え面16に引張りビード17が形成され
ており、他方この下型シワ押え面16に対向する
前記上型ダイス12の下面外周部が上型シワ押え
面18とされ、この上型シワ押え面18に前記引
張りビード17に対応する突条19が形成されて
いる。
The present invention will be described in more detail below, taking as an example the case where the product shown in FIG. 1 is drawn. first,
To explain the mold used, Fig. 3 is a sectional view with half of the mold in the longitudinal direction omitted, and Fig. 4 is a cross-sectional view taken along the - line in Fig. 3 with the upper die raised to the upper limit. In this sectional view, the upper surface of the lower die punch 11 provided on the lower die body 10 is formed in the same shape as the product 1, and the upper die 12 has a recess 13 having a shape corresponding to the upper surface of the lower die punch 11. , and is configured to be able to move up and down with respect to the lower die punch 11. A lower blank holder 15 is disposed around the outer periphery of the lower die punch 11, and is pushed up by a dike (not shown) via a cushion pin 14, and its upper surface serves as a lower die wrinkle pressing surface 16, and the lower blank holder 15 serves as a wrinkle pressing surface 16 for the lower die. A tension bead 17 is formed on the wrinkle pressing surface 16, and the outer circumference of the lower surface of the upper mold die 12 facing the lower mold wrinkle pressing surface 16 is an upper mold wrinkle pressing surface 18. A protrusion 19 corresponding to the tension bead 17 is formed on 18 .

前記下型ポンチ11のうち前記製品1の傾斜面
4から平坦面5にかかる部分に対応する箇所すな
わち上面側への折り返し曲げの際の折り返し曲げ
線に相当する部分を挟んだ両側に亘る部分に、予
絞り部材としてサブポンチ20が突出退入自在に
配置されている。このサブポンチ20は、その上
端面がその左右両側に位置するシワ押え面とほぼ
等しい角度(例えば15゜〜35゜)の傾斜面とされ、
かつ下型ポンチ11内に形成した空室21内に収
容され、さらにその下面側に配置したスプリング
22によつて押し上げられるとともに肩部を空室
21の上面に係合させることにより抜け止めした
構成とされている。なおここで、スプリング22
の弾性力は、通常の絞り成形に必要なクツシヨン
力の1/6〜1/3程度が好ましい。したがつて前記サ
ブポンチ20は、上型ダイス12を上方に引き上
げているとき、および成形中の製品1の剛性が前
記スプリング22の弾性力より弱い間において、
その上端面が下型ポンチ11の上面、より詳しく
は材料板の当るタイミングが最も遅い箇所の上面
から突出するようになつている。
A portion of the lower die punch 11 that corresponds to the portion extending from the inclined surface 4 to the flat surface 5 of the product 1, that is, a portion that spans both sides of the portion corresponding to the folding line when folding back to the upper surface side. A sub-punch 20 is disposed as a pre-drawing member so as to be able to protrude and retract. This sub-punch 20 has an upper end surface that is inclined at an angle (for example, 15° to 35°) that is approximately equal to the wrinkle pressing surfaces located on both left and right sides of the sub-punch 20,
It is housed in a cavity 21 formed in the lower punch 11, is pushed up by a spring 22 disposed on the lower surface thereof, and is prevented from coming off by engaging the shoulder with the upper surface of the cavity 21. It is said that Note that here, the spring 22
The elastic force is preferably about 1/6 to 1/3 of the cushioning force required for normal drawing. Therefore, when the sub-punch 20 is pulling the upper die 12 upward and while the rigidity of the product 1 being molded is weaker than the elastic force of the spring 22,
Its upper end surface protrudes from the upper surface of the lower die punch 11, more specifically from the upper surface of the portion where the timing of contact with the material plate is the latest.

なお、第3図および第4図中符号23はスプリ
ング止めピンを示し、また第4図中符号24はロ
ラブランクホルダー可動用のスライドプレートを
示す。
The reference numeral 23 in FIGS. 3 and 4 indicates a spring retaining pin, and the reference numeral 24 in FIG. 4 indicates a slide plate for movable the roller blank holder.

つぎに上記の金型を用いたこの発明の方法を説
明する。ロアブランクホルダー15上に載せた材
料板25は、上型ダイス12を下降させることに
より前記各シワ押え面16,18で掴まれ、しか
る後ロアブランクホルダー15がダイクツシヨン
のクツシヨン力に抗して下降することにより材料
板25は下型ポンチ11に当接し、その結果、互
いにほぼ平行な二本の折り曲げ線に沿つて下面側
に折り曲げられ始める。その場合、折り曲げ開始
直後すなわち成形初期においては、前記予絞り部
材としてのサブポンチ20が下型ポンチ11の上
面から突出し、しかもサブポンチ20を押し上げ
ているスプリング22の弾性力が材料板25の剛
性より強いから、材料板25は第3図に一点鎖線
で示すようにそのサブポンチ20により部分的に
相対的に押し上げられ、その結果第5図に示すよ
うに膨出部26が形成される。この膨出部26の
位置は、サブポンチ20の配置位置から明らかな
ように、最終製品1における傾斜面4から平坦面
5にかけての位置であり、これは最終的にはコ字
状断面に成形する下面側への折り曲げとそのコ字
状断面部分を図に示すように上面側に反り返らせ
た形状に成形する折り返し曲げとを行なう位置に
対応し、下型ポンチ11へのタツチタイミングが
最も遅い位置である。しかしてこの段階では、材
料板25には、長手方向での折り返し曲げは特に
積極的には生ぜず、サブポンチ20による伸びが
生じる。
Next, the method of the present invention using the above mold will be explained. The material plate 25 placed on the lower blank holder 15 is gripped by the wrinkle pressing surfaces 16 and 18 by lowering the upper die 12, and then the lower blank holder 15 is lowered against the cutting force of the die cutting. As a result, the material plate 25 comes into contact with the lower die punch 11, and as a result, it begins to be bent downward along two bending lines that are substantially parallel to each other. In that case, immediately after the start of bending, that is, at the initial stage of forming, the sub-punch 20 as the pre-drawing member protrudes from the upper surface of the lower die punch 11, and the elastic force of the spring 22 pushing up the sub-punch 20 is stronger than the rigidity of the material plate 25. 3, the material plate 25 is partially pushed up relatively by the sub punch 20, as shown by the dashed line in FIG. 3, and as a result, a bulge 26 is formed as shown in FIG. As is clear from the arrangement position of the sub-punch 20, the position of this bulging portion 26 is from the inclined surface 4 to the flat surface 5 of the final product 1, and this is the position that will eventually be formed into a U-shaped cross section. Corresponding to the position of bending to the bottom side and folding back to form the U-shaped cross section into a shape that is curved back to the top side as shown in the figure, the touch timing to the lower die punch 11 is the latest. It's the location. However, at this stage, the material plate 25 is not particularly positively bent in the longitudinal direction, but elongated by the sub-punch 20.

上型ダイス12を更に下降させると、材料板2
5が更に曲げられて絞り成形が進行し、それに伴
つて材料板25の剛性が増し、また上型ダイス1
2による圧下力が作用するので、ついにはサブポ
ンチ20がスプリング22の弾性力に抗して押し
下げられ、下型ポンチ11内に退入する。このよ
うな成形末期においては、前記膨出部26を形成
した箇所の近傍でコ字状断面に成形する下面側へ
の折り曲げとそのコ字状断面部分を図に示すよう
に上面側に反り返らせた形状に成形する折り返し
曲げとが同時進行し、伸びと圧縮とが複雑に生じ
るが、最終的には前記膨出部26が引き伸ばされ
て所期の形状になるので、膨出部26を引き伸ば
して解消するという形状変化による伸びと圧縮と
が過不足なく生じその結果シワや伸び割れの発生
を防止することができる。これは現象的には、シ
ワや伸び割れを前記膨出部26で吸収したと言う
ことができる。
When the upper die 12 is further lowered, the material plate 2
5 is further bent and the drawing process progresses, the rigidity of the material plate 25 increases, and the upper die 1
2 acts, so that the sub punch 20 is finally pushed down against the elastic force of the spring 22 and retreats into the lower die punch 11. In the final stage of the forming process, the bulging portion 26 is bent downward to form a U-shaped cross section near the point where the bulged portion 26 is formed, and the U-shaped cross section is bent upward as shown in the figure. The folding and bending to form a straight shape proceed simultaneously, and elongation and compression occur in a complicated manner, but ultimately the bulge 26 is stretched and becomes the desired shape, so the bulge 26 is Elongation and compression due to the shape change caused by stretching and resolving occur in just the right amount, and as a result, the occurrence of wrinkles and stretch cracks can be prevented. This phenomenon can be said to be that the wrinkles and elongation cracks are absorbed by the bulged portion 26.

なお、この発明の方法は上述したように下型ポ
ンチ11に当たるタイミングが遅い部位を、成形
初期において伸び成形し、ここに膨出部26を形
成することによりシワや伸び割れの発生を防止す
る方法であり、したがつてこの発明の方法を実施
するにあたつて使用する金型は要は前述したよう
な膨出部を形成し得るものであればよく、そのた
めの予絞り部材は前記サブポンチ20に限られず
例えば下型ポンチを複数に分割し、通常では接触
タイミングの遅くなる箇所の分割片を予め上方に
突出させておき、これを前述したような予絞り部
材として作用させてもよい。また、予絞り部材を
上方に押し上げておく手段は、前記スプリング2
2に限られるものではなく、カム等の機械的手段
を用いてもよい。さらにこの発明は、第1図に示
す形状の製品1を絞り成形する場合に限らず、要
はコ字状断面に成形する下面側への折り曲げとそ
のコ字状断面部分を上面側に反り返らせた形状に
成形する折り返し曲げとを同一箇所に生じさせ、
かつその箇所の下型ポンチに当るタイミングが他
の箇所よりも遅い形状の製品を絞り成形する場合
に適用することができる。
As described above, the method of the present invention is a method in which the portion that is hit by the lower die punch 11 at a later timing is stretch-molded in the initial stage of molding, and the bulging portion 26 is formed there to prevent the occurrence of wrinkles and stretch cracks. Therefore, in carrying out the method of the present invention, the mold used may be any mold as long as it can form the bulge as described above, and the pre-drawing member for this purpose is the sub-punch 20. However, the present invention is not limited to this, and for example, the lower die punch may be divided into a plurality of parts, and the divided pieces at the portions where the contact timing is normally delayed may be made to protrude upward in advance, and may be used as the pre-squeezing member as described above. Further, the means for pushing the pre-squeezing member upward is the spring 2.
2, and mechanical means such as a cam may also be used. Furthermore, the present invention is not limited to the case where the product 1 having the shape shown in FIG. Folding and bending to form a straight shape occur at the same location,
In addition, it can be applied to the case where a product having a shape in which the timing of hitting the lower die punch at that location is later than at other locations is drawn.

以上説明したようにこの発明の絞り成形法によ
れば、コ字状断面に成形する下面側への折り曲げ
とそのコ字状断面部分を上面側に反り返らせた形
状に成形する折り返し曲げとを同一箇所に生じさ
せ、かつその箇所の下型ポンチに当るタイミング
が他の箇所のタイミングより遅くなるような鞍形
状等の形状の製品を絞り成形するにあたり、その
下型ポンチに当るタイミングが遅くなる箇所に成
形開始当初において膨出部を伸び成形しておき、
その膨出部を成形末期において引き伸ばして解消
しつつ成形するようにしたので、その箇所の伸び
と圧縮とがバランス良く過不足なく生じ、その結
果従来縮成形部位となつている箇所でも材料の伸
びを均一にし、シワの発生を有効に防止すること
ができる。
As explained above, according to the drawing method of the present invention, bending toward the lower side to form a U-shaped cross section and folding back to form a shape in which the U-shaped cross section is warped toward the upper surface side are performed. When drawing a product with a shape such as a saddle, which is formed at the same location and the timing at which the bottom punch hits that spot is later than the timing at other locations, the timing at which the bottom punch hits the bottom punch is delayed. At the beginning of molding, a bulging part is stretched and molded at the location.
Since the bulging part is stretched and eliminated at the final stage of molding, the elongation and compression at that part occur in a well-balanced manner, with just the right amount and not enough, and as a result, the material stretches even in the part that is conventionally used as a contraction molding part. It can even out the appearance of wrinkles and effectively prevent the appearance of wrinkles.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は鞍形状の絞り成形品の一例を示す斜視
図、第2図はシワの発生箇所を示すための第1図
の部の拡大図、第3図はこの発明の方法を実施
するために用いる金型の長手方向における半分を
示す断面図、第4図は上型ダイスを上限まで引き
上げた状態における第3図の―線に沿う断面
図、第5図は絞り成形初期の中間製品の一部を示
す斜視図である。 1…製品、11…下型ポンチ、12…上型ダイ
ス、20…サブポンチ(予絞り部材)、25…材
料板、26…膨出部。
FIG. 1 is a perspective view showing an example of a saddle-shaped drawn product, FIG. 2 is an enlarged view of the part shown in FIG. 1 to show where wrinkles occur, and FIG. Figure 4 is a cross-sectional view taken along the line - in Figure 3 with the upper die pulled up to its upper limit, Figure 5 is a cross-sectional view of the intermediate product at the initial stage of drawing. It is a perspective view showing a part. DESCRIPTION OF SYMBOLS 1...Product, 11...Lower die punch, 12...Upper die, 20...Sub punch (predrawing member), 25...Material board, 26...Bulging part.

Claims (1)

【特許請求の範囲】 1 平板状の材料板の周辺部を上下のシワ押え面
で挟持した状態でその上下のシワ押え面を下型ポ
ンチに対して相対的に下降させて材料板を下型ポ
ンチの上面に押し付けかつその材料板を上型ダイ
スによつて下型ポンチの上面に更に圧接させるこ
とにより、前記材料板に、相互にほぼ平行な二本
の折り曲げ線に沿つて下面側へ折り曲げてコ字状
断面に成形する折り曲げとその二本の折り曲げ線
のそれぞれにほぼ直交する折り返し曲げ線に沿つ
て前記コ字状断面部分を上面側に反り返らせた形
状に成形する折り返し曲げとを施す絞り成形を行
なうにあたり、 前記折り曲げと折り返し曲げとに先立つて、前
記材料板のうち前記折り返し曲げ線に相当する部
分を挟んだ両側に亘る部分に、上面側に脹らんだ
膨出部を予め形成し、かつ前記折曲げと折り返し
曲げとを材料板に施すことにより前記膨出部を引
き延ばして消失させることを特徴とする絞り成形
法。
[Scope of Claims] 1. With the peripheral part of a flat material plate being held between the upper and lower wrinkle pressing surfaces, the upper and lower wrinkle pressing surfaces are lowered relative to the lower die punch to press the material plate into the lower die. By pressing the material plate against the upper surface of the punch and further pressing the material plate against the upper surface of the lower punch using an upper die, the material plate is bent downward along two bending lines that are substantially parallel to each other. Bending to form a U-shaped cross section, and folding to form a shape in which the U-shaped cross section is curved upward along a folding bending line that is substantially orthogonal to each of the two bending lines. When performing the drawing process, prior to the bending and fold-back bending, a bulge that bulges toward the upper surface side is preliminarily formed on a portion of the material plate that spans both sides of the portion corresponding to the fold-back bend line. A drawing method characterized in that the bulging portion is stretched and disappears by forming the material plate, and applying the bending and folding back bending to the material plate.
JP56195815A 1981-12-05 1981-12-05 Drawing forming method Granted JPS5897430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56195815A JPS5897430A (en) 1981-12-05 1981-12-05 Drawing forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56195815A JPS5897430A (en) 1981-12-05 1981-12-05 Drawing forming method

Publications (2)

Publication Number Publication Date
JPS5897430A JPS5897430A (en) 1983-06-09
JPS642452B2 true JPS642452B2 (en) 1989-01-17

Family

ID=16347445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56195815A Granted JPS5897430A (en) 1981-12-05 1981-12-05 Drawing forming method

Country Status (1)

Country Link
JP (1) JPS5897430A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012223A (en) * 1983-07-04 1985-01-22 Toyota Motor Corp Bending method of pressed article
JP4866598B2 (en) * 2005-12-19 2012-02-01 株式会社タクマ Wet ash extrusion equipment
JP2008200709A (en) * 2007-02-20 2008-09-04 Nissan Motor Co Ltd Apparatus and method for manufacturing press-formed product and press formed product
JP4922037B2 (en) * 2007-03-28 2012-04-25 株式会社神戸製鋼所 Aluminum alloy sheet press forming method and press forming apparatus
JP4907590B2 (en) * 2008-04-01 2012-03-28 新日本製鐵株式会社 Metal cross-section hat-shaped member having a bent portion outside the plane in the longitudinal direction of the member, and press forming method thereof
CN105636717B (en) * 2013-10-24 2017-12-19 新日铁住金株式会社 The manufacture device and manufacture method of Cap-style Section part
EP3238846A4 (en) * 2014-12-22 2018-09-12 Nippon Steel & Sumitomo Metal Corporation Method for manufacturing component with hat-shaped cross section
JP6677289B1 (en) * 2018-12-12 2020-04-08 Jfeスチール株式会社 Press molding method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019279B2 (en) * 1975-08-19 1985-05-15 松下電器産業株式会社 Sewing machine single stitch device

Also Published As

Publication number Publication date
JPS5897430A (en) 1983-06-09

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