1267410 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是關於提供液壓凸出加工的異形材管’和使用 該異形材管而液壓凸出加工的液壓凸出加工裝置、液壓凸 出加工方法、及施行液壓凸出加工的液壓凸出加工物。 【先前技術】 液壓凸出加工是與其他的成形加工方法相比較，具備 許多的特長。例如，由於可加工成長軸方向上剖面形狀不 同之複雜形狀的零件，因此，在先前方法中必須要熔接接 合的機械零件可用一體成形來進行加工。另外，由於該加 工是普及被施以加工的部位之整體而使加工硬化產生，因 此即使採用軟質的材管也可獲得高強度的製品。 而且，加工後的回彈較少，製品的尺寸精度良好（形 狀固定性良好）。爲此，使製品尺寸的修正的製程不需要 ，謀求製程的省略。 液壓凸出加工是評價有上述優良的特長，而且在最近 ，形成尤其作爲汽車用零件的製造方法所採用的方式。 通常，在藉由液壓凸出加工而將管成形加工的情況， 將朝長軸方向具有均一的圓剖面的直線形的管（以下，稱 爲「直線材管」）作爲素材而使用，對該素材施行作爲「 預先成形」的彎曲加工及壓擠加工之後，施行作爲加工製 程之最後製程的液壓凸出加工。由於經由如此一連的加工 製程，可製造從直線材管加工成預定形狀的液壓凸出加工 -5- 1267410 (2) 物。 第1圖是說明採用以往的直線材管而獲得製品的液壓 凸出加工的加工製程之中的最後製程之圖。如同圖所示， 在最後製程的液壓凸出加工，是通過注入孔3而將加工液 注入於上下的模具1、2內所安裝的直線材管p 1之中，而 且負載內壓。另外，除了內壓負載以外，藉由兼具密封工 具的壓軸工具4、5，從兩管端朝軸方向壓進材管p 1 (以 下，稱爲「壓軸」）。 在液壓凸出加工，是組合負載內壓及壓軸，而製造具 有各種的剖面形狀之製品P2。而且，兼具密封工具的壓 軸工具4、5是連接在未圖示的油壓缸，在液壓凸出加工之 中，控制其軸方向位置及壓軸力。 在液壓凸出加工，從管端向軸方向的壓軸，可促進材 管之膨脹出時的金屬流動（metal flow)，而具有使材管 的擴管界限提升的效果。爲此，在液壓凸出加工，從管端 向軸方向的壓軸是非常重要的加工製程。 具體上，在液壓凸出加工之中，不實施壓軸而僅以內 壓負載來進行加工之時，直線材管P1伴隨膨脹出而板厚 顯著地減少。爲此，直線材管P1是在液壓凸出加工的途 中導致斷裂。也就是，直線材管P1的成形可能的範圍（ 擴管界限）形成限制。 另外，在液壓凸出加工，是具有起因於材管形狀的問 題。如上述，作爲該加工的特長之一，即使可獲得軸方向 上剖面形狀相異的複雜的加工形狀，對可獲得的加工形狀 1267410 (3) 仍具有限制。 例如，在定義了周長增加率（擴管率）={(該部位 的加工物的外周長/材管的圓周長）—l}xl00%的情況， 雖然也根據加工物所要求的形狀特性和使用的材管條件（ 材質、板厚），但是壓軸是除了有效的管端部領域以外， 周長增加率（擴管率）是不過25 %左右。 超過該界限的周長增加率（擴管率），不能施行液壓 凸出加工。以如此的周長增加率（擴管率）的規定條件， 爲了提升加工物的形狀設計的自由度，而且獲得具有更複 雜的剖面形狀的加工物，因此有必要對材管形狀想辦法。 爲了對應此問題，因此提案有採用大致圓錐狀的材管 (以下、稱爲「錐形材管」）取代直線材管。亦即，藉由 採用錐形材管，即使是直線材管難以成形的零件，例如， 沿著軸方向而增大的周長會變化的.零件，也可減低地抑制 伴隨加工之周長增加率，而且可形成預定的加工形狀（例 如，參照日本特開2001-321 842號公報，第1頁，第2圖） 〇 可是，採用在軸方向上剖面形狀會變化的錐形材管進 行液壓凸出加工的情況，在使用上述第1圖所示之直線材 管用的壓軸工具的情況，在錐形材管施行壓軸是困難。 第2圖是說明採用以往的直線材管用壓軸工具對錐形 材管進行壓軸時所產生的問題之圖。如同圖所示，在大徑 側是不能朝錐形材管TP 1形成自體壓軸，另外，在小徑側 是雖然可進行往錐形材管TP 1的壓軸，但是伴隨壓軸，隨 1267410 (4) 著壓軸工具4進入到上下的模具1、2的內部，而使壓軸工 具4側的錐形材管TP 1的內外面的限制不足夠，會產生密 封洩漏。 第3圖，是說明採用以往的錐形材管的液壓凸出加工 製程之圖，同（a )是顯示加工前的狀態，（b )是顯示內 壓負載加壓前的狀態，（c )是顯示加工完成時的狀態。 在採用以往的錐形材管TP 1的液壓凸出加工，如第3 圖所示，雖然是使用前端部爲錐狀的壓軸工具6、7 ’但是 由於不能施行壓軸，因此僅以內壓負載而使液壓凸出加工 完成的是一般性，而且第3圖中的TP2是顯示形成管端部 之後的錐形材管，TP3是顯示液壓凸出加工後的製品（液 壓凸出加工物）。 在第3圖所示的加工製程，因爲不能施行錐形材管 TP2的壓軸，所以如同上述，在液壓凸出加工的階段僅用 不產生斷裂程度的成形範圍來加工。因此，在液壓凸出加 工之中，實際上是無法充分地發揮採用錐形材管之效果。 爲此，在採用錐形材管進行液壓凸出加工的情況’冀 望有往材管加諸內壓負載，並可進行從管端往軸方向的壓 軸的技術開發。 在以往的錐形材管施行液壓凸出加工的情況，除了壓 軸是困難的問題之外，也有接合液壓凸出加工物與其他構 件的情況之問題。 第4圖，是說明接合具有長方形剖面的液壓凸出加工 物的情況的問題之圖，同（a )是顯示以往的液壓凸出加 -8- 1267410 (5) 工物的形狀，（b )是顯示本發明的液壓凸出加工物的形 狀，相對於各個加工物的軸方向而顯示管端部的傾斜。（ c )是顯示上述（a )及（b )的液壓凸出加工的剖面形狀 〇 將以往的錐形材管作爲素材所液壓凸出加工的製品 PT3，是如第4 ( a )圖所示，管端部是僅傾斜Θ。爲此， 在與其他的構件的熔接、接合之際，由於不能確保精度， 因此與其他的構件的接合等是不容易。 而且，將管端插入於其他零件而結合的插入結合之際 ，由於同樣地不能確保精度，因此定位是困難。爲此，在 液壓凸出加工後需要切掉液壓凸出加工物的端部等的最後 完成加工。 【發明內容】 本發明是有鑑於上述以往的問題點而開發完成，其目 的爲提供在採用橫剖面形狀在軸方向上會變化的異形材管 的液壓凸出加工之中，施行於對材管的內壓負載，並可進 行從管端向軸方向的壓軸，而且可獲得大的擴管率的液壓 凸出加工用異形材管，和使用該異形材管的液壓凸出加工 裝置、液壓凸出加工方法、及液壓凸出加工物。 爲了達成上述目的，本發明的液壓凸出加工用異形材 管，係用於伴隨著朝軸方向軸壓加工之液壓凸出加工用的 異形材管，製作成具有外徑從軸方向的其中一方到另一方 逐漸增加或減少的周長，而且在至少其中一方端側形成平 -9 - 1267410 (6) 行部。 在本發明的液壓凸出加工用異形材管，上述平行部的 長度是冀望形成·’利用液壓凸出加工所施行的壓軸量及加 工時的密封所需長度之合計長度以上。 而且，用於具有矩形剖面、或多角形狀剖面的液壓凸 出加工物的製造的異形材管，是冀望使在上述平行部的隅 角部的曲率半徑R對應於管端部的軸方向距離所對應的異 形材管的周長差的變化而變化。 然後，倘若將上述構成所形成的本發明異形材管，安 裝在「分別於上下兩模具本體之至少其中一方的端側內面 、及對於該端側內面之軸壓工具外面設置平行部」之本發 明的液壓凸出加工裝置的模具內，可使內壓負載與軸壓形 成組合。 藉此，在液壓凸出加工之中，可獲得比以往更的擴管 率，另外，與其他的零件之接合也容易進行。 【實施方式】 第5圖是顯示構成本發明的異形材管的錐形材管的形 狀例的剖面圖。本發明的液壓凸出加工用異形材管11是提 供液壓凸出加工的異形材管，如同（a ) ( b )所示，具有 外徑從軸方向的其中一方到另一方逐漸增加或減少的周長 ’而且在至少其中一方端（在第5圖所示之例是小徑側及 大徑側的兩端）側形成平行部11 a、11 b。 在本發明的液壓凸出加工用異形材管，上述平行部 -10- 1267410 ⑺ . lla、lib的長度是冀望爲利用液壓凸出加工的壓軸量及 * 密封所需的長度之合計長度以上。 第6圖是例示本發明的異形材管的整體構成之圖，同 ： (a )是顯不在具有圓剖面的錐形部的兩端形成具有圓剖 面的平行部之例，（b )是顯示在具有長方形剖面的錐形 部的兩端設置具有長方形剖面的平行部之例。 利用第6 ( a ) ( b )圖更詳細地說明在上述第5 ( a ) 圖所示的實施例。第6(a)圖是因爲顯示最基本的形態， · 所以在具有圓剖面的錐形部的兩端形成具有圓剖面的平行 部 11 a、11 b 〇 另外’弟6 ( b )圖是在具有長方形剖面的錐形部的兩 端設置具有長方形剖面的平行部11a、lib。在該第6 ( b ) 圖所不之例’平fT部11a、lib是具有普及於全長，而且 在小徑側的平行部11 a是後述第10 ( a )圖所示的剖面、 以及在大徑側的平行部1 lb是後述第1 1 ( c )圖所示的剖 面。 鲁 第7圖是例示本發明的其他的異形材管的整體構成之 圖，與上述第6圖的構成相比較，在大徑側的平行部與中 央的錐形部之間顯示具有轉移部的異形材管的構成例。 其次，利用第7 ( a ) ( b )圖詳細說明在上述第5 ( b )圖所示的實施例。第7 ( a )圖是在具有圓剖面的錐形部 ' 的兩端形成具有圓剖面的平行部11 a、11 b，在大徑側的平 · 行部lib與中央的錐形部之間具有轉移部11c。 另外，第7 ( b )圖是在具有長方形剖面的錐形部的兩 -11 - 1267410 (8) 端設置具有長方形剖面的平行部11 a、11 b，在大徑側的平 行部1 lb與中央的錐形部之間與上述同樣地具有轉移部 11 c 〇 在上述第6(b)圖或第7(b)圖，形成在兩端部的平 行部11a、lib的形狀是雖然僅顯示具有長方形剖面，但 是平行部11a、lib的形狀爲如在後述的第12圖所示的梯 形的剖面形狀、或如在後述的第1 3圖所示的L字型的剖面 形狀、或未圖示之多角形的剖面形狀等也可。 在該情況，液壓凸出加工後的最後端面形狀是以與製 品的端面形狀一致的方式設計的話，材料成品率會提升， 且適宜。 另外，在第6(b)圖或第7(b)圖之中央的錐形部也 雖然顯示作爲長方形剖面，但是中央部是沒有特別爲長方 形剖面的理由，即使如第6 ( a )圖或第7 ( a )圖的圓剖面 也可’即使可插入於液壓凸出加工的模具的方式來進行彎 曲加工或由上下左右的壓擠加工也可。 第8圖是針對在大徑側端部具有平行部的本發明之異 形材管的製造方法之說明圖，同（a)是顯示整體立體圖 ’ （b)是顯示展開圖，（c)是顯示在（b)所示的展開 圖中近似梯形形狀之圖。 針對在具有如第8 ( a )圖所示的圓剖面的錐形部的大 徑側端部具有平行部1 lb的本發明的異形材管11的製造方 法I兌明的話，形成如下所述。 在第8(a)圖所示的異形材管u是將在8(b)圖所示 -12· 1267410 Ο) 的形狀的板單純彎曲，而且將a — b及a， 一 b， 、c — d及 C’ 一 d’ 、b— e及c— e、b’ —e及c， 一 e的端部接合的 話，如第8 ( a )圖所示，可在獲得大徑側端部具有平行部 lib的異形材管11。 另一方面，在第8 ( c )圖，是以虛線將同（b )倂記 ，並且以實線顯示接近此之梯形形狀。1267410 (1) Field of the Invention The present invention relates to a profiled pipe tube for providing hydraulically convex processing, and a hydraulic convex processing device for hydraulically projecting using the profiled pipe, and hydraulically protruding The processing method and the hydraulic convex processing for performing the hydraulic convex processing. [Prior Art] Hydraulic projection processing has many advantages compared with other forming processing methods. For example, since the parts having different cross-sectional shapes and different shapes in the direction of the growth axis can be machined, the mechanical parts which must be welded and joined in the prior method can be integrally formed for processing. Further, since the processing is to spread the work-hardening due to the spread of the entire portion to be processed, a high-strength product can be obtained even with a soft material pipe. Moreover, the rebound after processing is small, and the dimensional accuracy of the product is good (the shape is well fixed). For this reason, the process of correcting the size of the product is not required, and the omission of the process is sought. The hydraulic embossing process is an evaluation of the above-described excellent features, and recently, it has been adopted as a method of manufacturing a part for automobiles. In the case of forming a tube by hydraulic bulging, a straight tube having a uniform circular cross section in the longitudinal direction (hereinafter referred to as a "linear tube") is used as a material. After the material is subjected to the "pre-forming" bending process and the press working, the material is subjected to the hydraulic embossing process as the final process of the machining process. Due to such a continuous processing process, it is possible to manufacture a hydraulically convex processing -5-1267410 (2) which is processed from a straight tube into a predetermined shape. Fig. 1 is a view showing a final process in a processing process for obtaining a hydraulic bulging process of a product using a conventional straight tube. As shown in the figure, in the hydraulic projection processing of the final process, the machining liquid is injected into the linear material pipe p1 installed in the upper and lower molds 1, 2 through the injection hole 3, and the internal pressure is applied. Further, in addition to the internal pressure load, the pressure tube tools 4 and 5 having the sealing tool press the material pipe p 1 (hereinafter referred to as "pressing shaft") from the both pipe ends in the axial direction. In the hydraulic bulging process, a product P2 having various cross-sectional shapes is manufactured by combining the internal pressure of the load and the pressure shaft. Further, the pressure shaft tools 4 and 5 which have a sealing tool are connected to a hydraulic cylinder (not shown), and the axial direction position and the axial force are controlled during the hydraulic projection processing. In the hydraulic bulging process, the pressure shaft from the pipe end to the axial direction promotes the metal flow when the pipe is expanded, and has the effect of increasing the pipe expansion limit of the material pipe. For this reason, in the hydraulic bulging process, the pressing shaft from the pipe end to the axial direction is a very important processing process. Specifically, in the hydraulic bulging process, when the press shaft is not applied and the machining is performed only by the internal pressure load, the linear material pipe P1 is significantly expanded in accordance with the expansion. For this reason, the straight tube P1 causes breakage on the way of the hydraulic bulging process. That is, the possible range of formation of the straight tube P1 (the expansion limit) forms a limit. In addition, in the hydraulic bulging process, there is a problem due to the shape of the material tube. As described above, as one of the features of the processing, even if a complicated processed shape having a different cross-sectional shape in the axial direction can be obtained, there is a limit to the available processed shape 1267410 (3). For example, in the case where the increase rate of the circumference (expansion rate) = {(the outer circumference of the workpiece in the portion/the circumference of the material tube) - l} x 100% is defined, although the shape characteristics required by the workpiece are also specified. And the material condition (material, plate thickness) used, but the final axis is not only about 25% except for the effective pipe end field. The circumferential increase rate (expansion rate) exceeding this limit cannot be subjected to hydraulic bulging. With such a predetermined condition of the increase rate of the circumference (expansion rate), in order to increase the degree of freedom in designing the shape of the workpiece and to obtain a workpiece having a more complicated cross-sectional shape, it is necessary to find a shape for the tube shape. In order to cope with this problem, it is proposed to replace the linear material tube with a substantially conical material tube (hereinafter referred to as "conical material tube"). In other words, by using the tapered material tube, even if the part in which the straight material tube is difficult to be formed, for example, the part whose circumferential length increases along the axial direction changes, the increase rate of the circumference accompanying the processing can be suppressed. Further, it is possible to form a predetermined processed shape (for example, refer to Japanese Laid-Open Patent Publication No. 2001-321842, No. 1, No. 2). However, the hydraulic pipe is formed by a tapered pipe whose cross-sectional shape changes in the axial direction. In the case of the processing, in the case of using the finalizing tool for a straight material tube shown in Fig. 1, it is difficult to apply the pressing shaft to the tapered material tube. Fig. 2 is a view for explaining a problem occurring when a tapered shaft tube is pressed by a conventional reclining tool for a straight tube. As shown in the figure, on the large diameter side, the autogenous pressing shaft cannot be formed toward the tapered material pipe TP1, and on the small diameter side, although the pressing shaft toward the tapered material pipe TP1 can be performed, with the pressing shaft, with 1267410 ( 4) The pressing shaft tool 4 enters the inside of the upper and lower molds 1, 2, and the restriction of the inner and outer surfaces of the tapered material pipe TP 1 on the side of the finalizing tool 4 is insufficient, and a sealing leak occurs. Fig. 3 is a view showing a process of a hydraulic bulging process using a conventional tapered material tube, in which (a) is a state before the display is processed, and (b) is a state before the internal pressure load is pressurized, (c) It is the status when the processing is completed. In the hydraulic embossing process using the conventional tapered material pipe TP 1, as shown in Fig. 3, although the presser shaft tools 6, 7' having the tapered tip end portion are used, since the presser shaft cannot be applied, only the internal pressure load is applied. It is common to complete the hydraulic bulging process, and TP2 in Fig. 3 is a tapered material tube after the end portion of the tube is formed, and TP3 is a product (hydraulic embossing processed material) showing the hydraulic bulging process. In the processing shown in Fig. 3, since the pressing shaft of the tapered pipe TP2 cannot be applied, as described above, only the forming range which does not cause the degree of fracture is processed at the stage of the hydraulic convex processing. Therefore, in the hydraulic bulging process, the effect of using the tapered tube is not sufficiently exhibited. For this reason, in the case of the hydraulic bulging processing using the tapered pipe, it is expected that the internal pipe is subjected to the internal pressure load, and the technical development of the pressure shaft from the pipe end to the axial direction can be performed. In the case where the conventional conical material pipe is subjected to the hydraulic bulging process, in addition to the problem that the pressure shaft is difficult, there is also a problem in that the hydraulic pressure is applied to the workpiece and other members. Fig. 4 is a view for explaining a problem of joining a hydraulically protruding workpiece having a rectangular cross section, and (a) is a view showing a shape of a conventional hydraulic projection plus -8-1267410 (5), (b) The shape of the hydraulically convex workpiece of the present invention is shown, and the inclination of the pipe end portion is displayed with respect to the axial direction of each workpiece. (c) is a cross-sectional shape showing the hydraulic convex processing of the above (a) and (b), and the product PT3 which is hydraulically convexly processed using the conventional tapered material tube as a material, as shown in Fig. 4(a) The end of the tube is only inclined. For this reason, when welding and joining with other members, since precision cannot be ensured, it is not easy to join with other members. Further, when the tube end is inserted into another part and the insertion is combined, since the accuracy cannot be ensured in the same manner, positioning is difficult. For this reason, it is necessary to cut off the end portion of the hydraulically protruding workpiece or the like after the hydraulic projection processing. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a hydraulic tube projecting process for a profiled tube that changes in the axial direction by a cross-sectional shape, and is applied to a material tube. The internal pressure load, and the pressing shaft from the pipe end to the axial direction, and the large-scale expansion rate of the hydraulic protruding processing profile pipe, and the hydraulic convex processing device and the hydraulic convex using the profiled pipe Processing methods and hydraulically protruding workpieces. In order to achieve the above object, the profile pipe for hydraulic projection processing of the present invention is used for a profiled pipe for hydraulic projection machining which is axially machined in the axial direction, and is formed to have one outer diameter from one of the axial directions. To the other side, the circumference is gradually increased or decreased, and at least one of the end sides forms a flat -9 - 1267410 (6) line. In the profile pipe for hydraulic projection processing of the present invention, the length of the parallel portion is equal to or greater than the total length of the amount of the pressing shaft to be formed by the hydraulic projection processing and the required length of the sealing at the time of processing. Further, the profiled tube for the manufacture of a hydraulically convex workpiece having a rectangular cross section or a polygonal cross section is such that the radius of curvature R of the corner portion of the parallel portion corresponds to the axial distance of the end portion of the tube. The difference in the circumferential length of the corresponding profile tube changes. Then, the profiled pipe of the present invention formed as described above is attached to "the inner surface of the end side of at least one of the upper and lower mold bodies, and the parallel portion of the outer surface of the axial pressure tool for the inner surface of the end side". In the mold of the hydraulic projection processing apparatus of the present invention, the internal pressure load can be combined with the axial pressure. Thereby, in the hydraulic bulging process, the pipe expansion ratio can be obtained more than ever, and the joining with other components can be easily performed. [Embodiment] Fig. 5 is a cross-sectional view showing a shape example of a tapered material pipe constituting the profiled material pipe of the present invention. The profile tube 11 for hydraulic bulging processing of the present invention is a profiled pipe for providing hydraulic embossing, and has an outer diameter which gradually increases or decreases from one of the axial directions to the other as shown in (a) (b). The circumference "and the parallel portions 11a, 11b are formed on at least one of the ends (the both ends of the small diameter side and the large diameter side in the example shown in Fig. 5). In the profile tube for hydraulic projection processing of the present invention, the length of the parallel portion -10- 1267410 (7) lla and lib is equal to or greater than the total length of the amount of the pressing shaft by the hydraulic bulging processing and the length required for the sealing. Fig. 6 is a view showing an overall configuration of a profiled pipe according to the present invention, and is the same as: (a) an example in which a parallel portion having a circular cross section is formed at both ends of a tapered portion having a circular cross section, and (b) is a display. An example of a parallel portion having a rectangular cross section is provided at both ends of a tapered portion having a rectangular cross section. The embodiment shown in the above fifth (a) is explained in more detail using the sixth (a) (b) diagram. Fig. 6(a) is because the most basic form is shown, so that parallel portions 11a, 11b having a circular cross section are formed at both ends of the tapered portion having a circular cross section, and the other '6' (b) figure is Both ends of the tapered portion having a rectangular cross section are provided with parallel portions 11a and lib having a rectangular cross section. In the example of the sixth (b) diagram, the flat fT portions 11a and 11b are distributed over the entire length, and the parallel portion 11a on the small diameter side is a cross section shown in Fig. 10(a), which will be described later, and The parallel portion 1 lb on the large diameter side is a cross section shown in the first 1 (c) diagram to be described later. FIG. 7 is a view showing an overall configuration of another profiled pipe according to the present invention, and a transfer portion is provided between the parallel portion on the large diameter side and the tapered portion on the center as compared with the configuration of the sixth embodiment. A configuration example of a profiled pipe. Next, the embodiment shown in the above fifth (b) will be described in detail using the seventh (a) (b) diagram. In the seventh (a) diagram, parallel portions 11a and 11b having a circular cross section are formed at both ends of the tapered portion 'having a circular cross section, between the flat portion lib on the large diameter side and the tapered portion at the center. There is a transfer portion 11c. Further, in the seventh (b) diagram, the parallel portions 11a, 11b having a rectangular cross section are provided at the ends of the two -11 - 1267410 (8) of the tapered portion having a rectangular cross section, and the parallel portions 11b on the large diameter side are The central tapered portion has the transition portion 11 c in the same manner as described above. In the sixth (b) or seventh (b) diagram, the shapes of the parallel portions 11a and lib formed at both end portions are displayed only. It has a rectangular cross section, but the shape of the parallel portions 11a and lib is a trapezoidal cross-sectional shape as shown in Fig. 12 to be described later, or an L-shaped cross-sectional shape as shown in Fig. 3 to be described later, or not. The polygonal cross-sectional shape or the like may also be used. In this case, the shape of the final end face after the hydraulic embossing is designed to match the shape of the end face of the product, and the material yield is improved and is suitable. Further, although the tapered portion at the center of the sixth (b) or the seventh (b) is also shown as a rectangular cross section, the central portion is not particularly a rectangular cross section, even if it is as shown in Fig. 6 (a) or The circular cross section of Fig. 7(a) may be subjected to bending processing or extrusion processing from top to bottom and left and right, even if it can be inserted into a mold for hydraulically protruding machining. Fig. 8 is an explanatory view showing a method of manufacturing the profiled pipe of the present invention having parallel portions at the large-diameter side end portion, and (a) is a display overall perspective view (b) is a display development view, and (c) is a display. A diagram of a trapezoidal shape is approximated in the developed view shown in (b). The manufacturing method I of the profiled pipe 11 of the present invention having the parallel portion 1 lb at the large-diameter side end portion of the tapered portion having the circular cross section as shown in Fig. 8(a) is formed as follows. . The profiled tube u shown in Fig. 8(a) is simply bent in the shape of the shape shown in Fig. 8(b) -12·1267410 ,), and will be a — b and a, a b, c —d and C' a d', b-e and c-e, b'-e and c, if the end of an e is joined, as shown in Fig. 8(a), the large-diameter side end can be obtained. A profiled tube 11 having a parallel portion lib. On the other hand, in the eighth (c) diagram, the same as (b) is taken as a broken line, and the trapezoidal shape close to this is shown by a solid line.
如用實線與虛線的比較可知，在單純地彎曲成第8 ( c )圖中以貫線所不的梯形時，在b — c 一 e的區域及b，〜 c’ - e ’的區域產生了肉芽。亦即，在將梯形形狀作爲素 材的捲板製程中’如本發明的異形材管11，在端部具有平 行部1 lb的異形材管的製造是困難。 最單純的方法是採用第8圖而說明的方式，將具有本 發明的異形材管11的展開形狀的板單純彎曲並接合的方法 ，其次’針對利用上述以外的方法，製造上述在第6圖、 第7圖所示的形狀之本發明的異形材管11的方法進行說明As can be seen from the comparison between the solid line and the broken line, in the case of simply bending into the trapezoid in the eighth (c) diagram, the area of b - c - e and the area of b, ~ c' - e ' Produced granulation. That is, in the winding process in which the trapezoidal shape is used as the plain material, it is difficult to manufacture the profiled pipe 11 having the parallel portion 1 lb at the end portion as in the profiled pipe 11 of the present invention. The most simple method is a method of simply bending and joining the sheets having the developed shape of the profiled material tube 11 of the present invention, as described in the eighth drawing, and secondly, the above-described method in the sixth drawing is produced by the method other than the above. The method of the profiled material tube 11 of the present invention having the shape shown in Fig. 7 is explained
〇 在上述第6 ( a )圖所示的形狀的情況，是例如，藉由 將「單純的錐形管」作爲素材而小徑側是進行內徑擴大加 工，大徑側是進行外徑縮小加工而可獲得。另外，在第6 (b )圖所示的形狀之情況，是藉由除了上述另外對中央 的驅體長部進行擠壓加工而可獲得。 在本發明的說明，所說的「單純的錐形管」，是本發 明的異形材管的素材，意味並未在其中一方側或兩端形成 平行部的錐形管。 -13- 1267410 (10) 在上述第7 ( a )圖所示的形狀的情況，是例如，將r 單純的錐形管」作爲素材而小倥側、大徑側同時地進行內 徑擴大加工的話也可。另外，在第7 ( b )圖所示的情況， 是藉由除了上述另外對中央的驅體長部進行擠壓加工而可 獲得。 第9圖是顯示本發明的異形材管的其他的實施例與該 實施例所採用的壓軸工具之圖，同（a )是整體立體圖， (b )是小徑側的放大圖的，（c )兼具上述所採用的小徑 側的密封工具的壓軸工具的放大圖。在第9圖所示的實施 例，同（a )所示的樣態是在長方形剖面的錐形面的兩端 形成長方形剖面的平行部11 a、1 lb。 而且，在第9圖所示的實施例，在單純的錐形管上的 小徑側的平行部11 a是在對應於δ L + L0的部份，並且在大 徑側的平行部lib是在對應於δ!/ +L0’的部份，形成 具有與製品大致同一的寬幅、高度的尺寸的矩形剖面。 另外，隅角部的曲率半徑R是以後述的方式來決定， 而在液壓凸出加工藉由模具本體12、13與兼具密封工具的 壓軸工具14、15，在液壓凸出加工時的壓軸不致產生彎曲 等，而且可形成非常平順的材料之壓入。 第10圖是顯示在液壓凸出加工物的小徑側具有矩形剖 面的情況所採用的本發明的異形材管的端面形狀之圖，同 (a)是顯示由小徑側端部朝軸方向僅離開SL+LO的位置 之剖面，（c )是顯示管端部的剖面，（b )是顯示在此等 的中間位置之剖面。 -14- (11) 1267410 亦即，第10圖是說明在本發明的異形材管的小徑側1 @ 平行部11 a的各剖面的形狀之圖，從（a )到（C )的剖面 的寬幅W0與高度H0是幾乎一定。另外，藉由預先成形隅 角部的曲率半徑R而形成階段性變化。 如第1 〇圖（a )〜（c )所示，作成在小徑側端部的隅 角部的曲率半徑爲R0，由小徑側端部朝軸方向僅離開SL + L0的位置之隅角部的曲率半徑爲R1，由小徑側端部朝 軸方向僅離開X的位置之隅角部的曲率半徑爲R ( X )的 話，此等是形成下述（1 )式的關係。 R0 ^ R ( X ) ^ R1 ... ( 1 ) 在第10圖所示的實施例，是雖然在各剖面的4個隅角 部的曲率半徑爲相同，但是沒必要將此等作成相同，每個 隅角部作成不同的曲率半徑也可。 而且詳細地，是將單純的錐形管的兩端部作爲基準周 長，在從管端部的位置X之周長差Sd(x)，是藉由下述 (2)式而可獲得。但是，D0是顯示小徑側外徑、D0，是 顯示大徑側外徑、以及LT是顯示錐形管的長度。 6d(x)=；T*(D0，- DO ) ·Χ/ LT …（2) 在以預先成形來將端部的剖面形成呈寬幅W〇、高度 H0的矩形之際，對應於上述周長差5d(x)，而且如第1〇 1267410 (12) 圖所示，藉由使隅角部的曲率半徑R(X)的尺寸在軸方 向位置變化，而可決定適宜的預先成形的形狀。 第11圖是顯示在液壓凸出加工物的大徑側具有矩形剖 面的情況所採用的本發明的異形材管的端面形狀之圖，同 (a )是由大徑側端部朝軸方向僅離開δ L’ + L0 ’的位置 之剖面圖，（c )是管端部的剖面圖，（b )是在此等的中 間位置之剖面圖。 亦即，第1 1圖是說明在本發明的異形材管的大徑側的 平行部1 lb的各剖面的形狀之圖，從（a )到（c )的剖面 的寬幅W0’與高度H0’是幾乎一定。另外，藉由預先成 形隅角部的曲率半徑R’而形成階段性變化。 如第11圖（a )〜（c )所示，作成在大徑側端部的隅 角部的曲率半徑爲R0 ’ ，由大徑側端部朝軸方向僅離開 δ!/ + DO’的位置之隅角部的曲率半徑爲R1’ ，由大徑 側端部朝軸方向僅離開X的位置之隅角部的曲率半徑爲R ’ （X )的話，此等是形成下述（1 ’ ）式的關係。 R〇，S R’ （ X ) S R1， …（1’ ） 另外，將單純的錐形管的兩端部作爲基準周長，在從 管端部的位置X之周長差Sd(x)，是藉由下述（2’ ） 式而可獲得。但是，D 〇是顯不小徑側外徑、D 0 ’是顯不 大徑側外徑、以及LT是顯示錐形管的長度。 -16- 1267410 (13) δ(1(χ)=；Γ·(ϋ0’ - DO ) ·Χ/ LT ".(2，) 在將端部的剖面形成呈寬幅WO’ 、高度HO’的矩形 之際，對應於上述周長差δ(1 ( X)，而且如第11圖所示， 藉由使隅角部的曲率半徑R ’ （ X )的尺寸在軸方向位置 變化，而可決定適宜的形狀。 如上述，雖然就液壓凸出加工物是具有矩形剖面的情 況而說明，但是本發明的異形材管並不侷限於此，即使矩 形的組合形狀或多角形形狀也可採用，而且可形成液壓凸 出加工時之非常安定的壓軸。. 第12圖是在液壓凸出加工物具有梯形剖面的情況例示 其剖面形狀之圖。第1 3圖是在液壓凸出加工物具有L字型 剖面的情況例示其剖面形狀之圖。不論哪一個，均是在大 徑側所預先成形之剖面形狀之例，（a )是由大徑側端部 朝軸方向僅離開δΐ/ +LO’的位置之剖面圖，（c)是管 端部的剖面圖，（b )是在此等的中間位置之剖面圖。 其次，根據圖面說明本發明的液壓凸出加工裝置、以 及採用液壓凸出加工裝置的液壓凸出加工方法。 第14圖是說明本發明方法的第1實施例之圖，顯示異 形材管的管端部的平行部，在液壓凸出加工之前而形成的 情況。同（a )是顯示錐形管朝模具本體的安裝狀態剖面 圖，（b )是顯示在液壓凸出加工前形成平行部的狀態的 剖面圖，（c )是顯示在液壓凸出加工結束後的狀態的剖 面圖。 -17- 1267410 (14) 第15圖是顯示小徑側的上模具本體，兼具密封工具的 壓軸工具及異形材管端部的關係之圖，同（a )〜（c )是 相當於上述第l4(a)〜（c)圖之圖。 第1 6圖是顯示大徑側的上模具本體，兼具密封工具的 壓軸工具及異形材管端部的關係之圖，同（a )〜（c )是 相當於上述第14(a)〜（c)圖之圖。 第1 7圖是說明本發明方法的第2實施例之圖，在將異 形材管的管端部的平行部對模具本體的安裝前’顯示預％ 形成的情況。同（a )是顯示異形材管對模具本體的安裝 狀態的剖面圖，（b )是顯示液壓凸出加工前的狀態的剖 面圖，（c )是顯示液壓凸出加工結束後的狀態的剖面圖 〇 第18圖是說明本發明方法的第3實施例之圖，在將異 形材管的管端部的平行部對模具本體的安裝前，顯示預先 形成的情況的其他之例。同（a )是顯不異形材管Μ模具" 本體的安裝狀態的剖面圖，（b )是顯示液壓凸出加工前 的狀態的剖面圖，（c )是顯示液壓凸出加工結束後的狀 態的剖面圖。 本發明的液壓凸出加工裝置，是例如，具備有：形成 如第14圖、第17圖、及第18圖所示的模穴的上下之模具本 體1 2、1 3 ;及兼具在兩模具本體1 2、1 3之個別的端部可將 前端部插入的密封工具的壓軸工具14、15。然後’兩模具 本體12、13及壓軸工具14、15是藉由兩者以挾持本發明的 異形材管11的兩端部，而且保持的方式所構成。 -18- 1267410 (15) 而且，在上述壓軸工具的任一個都能設置有加工液的 注入孔，在上述模具本體的至少其中一方的端側（在第14 圖、第1 7圖、及第1 8圖所示之例是小徑側及大徑側的兩端 側）內面、及對應於該端面內面的壓軸工具的外面’分別 設置有平行部 12a、 12b、 13a、 13b、 14a、 15a。 該壓軸工具14、15的外面的平行部14a、15a是在壓 軸時從內面限制材管，而且發揮可使平順的變形之作用。 在該液壓凸出加工裝置之中，在作爲小徑部側的壓軸 量爲5L、大徑部側的壓軸量爲δ!/ 、在小徑部側的密封 必須要長度爲L0、在大徑部側的密封必須要長度爲L0’ 的情況，設置在兩模具本體12、13的至少其中一方的端側 (在第1 4圖、第1 7圖、及第1 8圖所示之例是小徑側及大徑 側的兩端側）內面的平行部12a、12b、13a、13b的長度 ，是冀望在設置於小徑部側的情況製作成SL + L0以上’ 在設置於大徑部側的情況是製作成δΐ/ + L0’以上。 同樣地，對應於該模具本體12、13所設置的平行部 12a、12b、13a、13b的壓軸工具14、15之平行部14a、15a 的長度，是冀望在設置於小徑部側的情況製作成SL + L0 以上，在設置於大徑部側的情況是製作成 L0’以上。 可是，在本發明的液壓凸出加工裝置，兼具小徑側（ 大徑側）的密封工具的壓軸工具14 ( 15 )的前端部是必須 可插入於形成異形材管11的素材的單純的錐形管PT或異 形材管11的小徑側端部（大徑側端部）。與此同時地，平 行部14a ( 15a)是必須在壓軸結束時的平行部14a ( 15a) -19- 1267410 (16) 的最前端部份與異形材管11的內面之間不會產生間隙。 爲此，例如，如第14圖所示，將形成異形材管11的素 材的單純的錐形管PT安裝在上下的模具本體12、13之後 ，在實施液壓凸出加工之前先將形成在管端部的平行部 i la、lib作成，在上下的模具本體12、13內形成的情況 ，兼具密封工具的壓軸工具是必須要滿足具有下述A、B 的條件。 A.兼具小徑側的密封工具的壓軸工具14 (參照第15圖 ) 無視前端的局部性凹部的包絡線的周長SD0，是滿足 下述（3 )式。 SDO ^ (DO— 2t/cos0 ) χ π ... ( 3 ) 但是，DO :小徑部的外徑 t :異形材管11的肉厚 Θ = tan_1{ ( DO’ - DO ) / ( 2*LT ) } LT :錐形管PT的長度 DO’ ：大徑部的外徑 B -兼具大徑側的密封工具的壓軸工具1 5 (參照第1 6圖 ) 無視前端的局部性凹部的包絡線的周長SD0’ ，是滿 足下述（4)式。 SDO’ ^ (DO’ - 2t/ cos θ ) χπ (17) 1267410 另一方面，如上述第17圖所示，於安裝在上下的模具 本體12、13之前，在將形成於異形材管11的管端部的平行 部11a、lib預先形成的情況，兼具密封工具的壓軸工具 是滿足下述C、D的條件。 C ·兼具小徑側的密封工具的壓軸工具1 4 (參照第1 7圖 ) 前端部的周長SD0’是滿足下述（5)式。 S D 0 $平行部1 4 a的周長S D …（5 ) D.兼具大徑側的密封工具的壓軸工具15 (參照第17圖 ) 前端部的周長SDO’ ，是滿足下述（6)式。 SDO’ g平行部15a的周長SD’ …（6 ) 採用本發明的液壓凸出加工裝置，而在成形液壓凸出 加工物17的情況，例如，如上述第14 ( a )圖所示，將本 發明的異形材管11的素材之單純的錐形管PT安裝在液壓 凸出加工裝置的一*對的模具本體12、13內。 其次’在液壓凸出加工之前，使兼具密封工具的壓軸 工具14、15朝軸方向移動，而且如第14(b)圖所示，在 挾持於模具本體12、13及壓軸工具14、15的錐形管ρτ的 -21 - (18) 1267410 管端、或兩端形成平行部11a、lib，而且成形呈本發明的 異形材管11。 此時，不須要將藉由壓軸工具14、15的異形材管11的 壓軸之時機作成相同，例如，以某種程度按壓壓軸工具15 的階段開始壓軸工具14的按壓也可。因此，異形材管11是 在模具本體1 2、1 3內選定穩定的壓軸時機的話就可。 在該情況，將上述的尺寸製作成基準而進行模具本體 12、13與兼具密封工具的壓軸工具14、15的尺寸設計的話 ，可將壓軸工具14、15平順地插入於錐形管PT。 在上述第14(b)圖的狀態，是如在第15(b)圖及弟 1 6 ( b )圖所示，在錐形管PT的兩管端是形成有在小徑側 L0以上，冀望爲3L+LO以上，在大徑側L0’以上的長度 的平行部11a、lib，而且獲得有本發明的異形材管11。其 後，在該異形材管11，讓加工液的密封完全地進行的狀態 下負載有內壓。 其次，一面使加工液的內壓上升，一面更使壓軸工具 14、15朝軸方向移動，而且施行液壓凸出加工，如上述第 14 ( c )圖所示，藉由本發明方法形成液壓凸出加工物17 〇 亦即，在將本發明的異形材管11安裝在本發明的液壓 凸出加工裝置而進行的液壓凸出加工，是形成可壓軸的結 果，而且在藉由本發明方法的液壓凸出加工物17，是可獲 得比以往更大的擴管率。 另外，液壓凸出加工物17的端面，是如上述第4(b) (19) 1267410 所示，因爲相對於軸心而垂直，所以也可形成容易地進行 與其他的零件、構件的接合熔接的方式，而且可形成插入 結合之疋位。 第19圖是顯示本發明方法的第4實施例之說明圖，是 顯示大徑側的平行部的內側的模穴以大徑端作爲基準而朝 軸方向單調地增加的構成例。同（a )是顯示錐形管朝模 具本體的安裝狀態的剖面圖，（b )是顯示在液壓凸出加 工前形成平行部的狀態的剖面圖，（c )是顯示在液壓凸 出加工結束後的狀態的剖面圖。 第19圖所示的實施例，是與在上述第14圖、第17圖及 第1 8圖所示的實施例有別的形態。亦即，雖然同樣在兩模 具本體12、13的兩端部具有平行部12a、12b、13a、13b， 但是兩模具本體12、13的大徑側的平行部12b、13b的內 側的模穴，不會如上述第14圖等所示之例子地局部性變窄 ，而且上述平行部12b、13b的內側的模穴是以大徑端作 爲基準，朝軸方向單調地減少。 在第1 9圖所示的構成例，由於壓軸的抵抗會變小，且 對於金屬流動（metal flow)有利，因此可使成形可能的 範圍（擴管界限）擴大。因此，在本發明的液壓凸出加工 裝置，冀望將模具本體1 2、1 3的模穴形狀設計成第1 9圖所 示的形狀。 另一方面在汽車零件之中，製品的端面的剖面形狀是 接近矩形或矩形的組合、或多角形等的形狀等，複雜的形 狀較多。 -23- 1267410 (20) 如上述，上述第18圖是顯示採用在第9 (a)圖所示的 本發明的異形材管11的情況的實施例之圖，在採用此之加 工之際，將在上述第9(a)圖所示的異形材管11安裝在模 具本體12、13內。在第9(b)圖顯示本發明的異形材管11 的小徑側的放大圖。另一方面，該小徑側平行部11 a的剖 面形狀是如同上述第10圖所不。 對於如此剖面形狀的異形材管11，採用兼具顯示本發 明之一例的密封工具的壓軸工具1 4、15而進彳了成形。亦即 ，第9 ( C )圖是雖然顯示兼具小徑側的密封工具的壓軸工 具14，但是具有寬幅 W0 — 2t、高度H0 — 2t、隅角部的曲 率半徑R 1的平行部1 4 a。 從上述第1 8 ( a )圖的狀態在端部擠壓入壓軸工具1 4 、15，而且在第18 ( b )圖的階段結束異形材管11的端部 的成形，而且在可獲得於上述第9 ( b )圖所示的異形材管 11的同時，讓內壓負載的加工液的密封是形成被完全地進 行的狀態。 其後，一面使加工液的內壓上升’一面更使壓軸工具 14、15朝軸方向移動，而且可獲得藉由施行液壓凸出加工 的本發明方法的液壓凸出加工物17 ° 而且，將在液壓凸出加工之前而進行的管端的平行部 11a、lib的形成預先成形或以此之前的階段進行也可。 可藉由縮徑加工、擴孔加工、型鍛（swaging )加工、旋 壓成形（s p i η n i n g )加工等既有的加工方法或其組合來施 行。 -24- 1267410 (21) 第20圖是顯示兼具本發明的液壓凸出加工裝置的構成 構件的密封工具之壓軸工具的構成例之圖。分別顯示同（ a )是以與異形材管11的端面接觸的端面14b、15b來密封 的情況之構成例，（b )是在相同的端面14b、15b給予突 起14c、15c的構成例，（c)是在與平行部14a、15a的端 面14b、15b的境界部給予了階段差l4d、15d的構成例， (d )是在平行部14a、15a給予了 Ο環18的構成例。 在第20 ( a )〜（d )所示的任一之構成例，均滿足在 上述（3 )〜（6 )式所示的平行部14a、15a與前端周長 之間的關係。 上述實施例，只是顯示本發明的一個具體例，模具本 體1 2、13的模穴的形狀也只是顯示比較簡單的形狀，當然 ，也可以是代表通常的汽車零件的三次元之複雜的形狀。 另外，在上述實施例，雖然顯示從大徑側與小徑側的 兩方進行壓軸，但是在本發明適用於其中一側，另一側爲 由先前技術所進行。例如，即使採用如上述第1圖所示的 無壓軸的方式也可。壓軸的效果是由於依據製品形狀而變 化，因此相對應其情況而決定本發明的適用範圍的話也可 〇 而且，在上述實施例，雖然主要是敍述以採用單純的 錐形管形狀來作爲異形材管11的素材的情況，但是在使單 純的錐形管形狀組合並熔接、或將錐形管與一般的直線管 組合的情況，也由於兩端部分別是可與單純的錐形管之一 部份相近似，因此可適用作爲本發明的異形材管11的素材 -25- (22) 1267410 [產業上之可利用性] 本發明的液壓凸出加工用異形材管是具有外徑從軸方 向的其中一方到另一方逐漸增加或減少的周長，而且在至 少其中一方端側形成平行部。在採用該異形材管的加工裝 置、加工方法中，在上下的兩模具本體之至少其中一方的 端側內面、及對應於該端側內面的壓軸工具的外面分別設 置平行部，並安裝在模具內的話，可形成組合內壓負載及 朝軸方向的壓軸的加工。藉此’在施行有液壓凸出加工的 液壓凸出加工物，可獲得比更大的擴管率。另外，形成可 與其他的零件之接合也容易地進行之方式’以作爲汽車用 ，更可適用作爲廣泛的產業機械用。 【圖式簡單說明】 第1圖是說明採用以往的直線材管而獲得製品的液壓 凸出加工的加工製程之中的最後製程之圖。 第2圖是說明採用以往的直線材管用的壓軸工具，並 在進行以往的錐形材管的壓軸的情況所產生的問題之圖。 第3圖是說明採用以往的錐形材管的液壓凸出加工製 程之圖，（a )是顯示加工前的狀態’ （b )是顯示內壓負 載加壓前的狀態，（c )是顯示加工完成時的狀態。 第4圖是說明接合具有長方形剖面的液壓凸出加工物 的情況的問題之圖，（a )是顯示採用以往的錐形材管的 液壓凸出加工物的形狀，（b )是顯示本發明的液壓凸出 -26- (23) 1267410 加工物的形狀，（c )是顯示此等的剖面形狀。 第5圖是顯示構成本發明的液壓凸出加工用異形材管 的錐形材管的形狀例的剖面圖。 第6圖是例示本發明的異形材管的整體構成之圖，（a )是顯示在具有圓剖面的錐形部的兩端形成具有圓剖面的 平行部之例’ （b )是顯示在具有長方形剖面的錐形部的 兩端設置具有長方形剖面的平行部之例。 第7圖是例示本發明的其他的異形材管的整體構成之 圖，在大徑側的平行部與中央的錐形部之間顯示具有轉移 部之例。 第8圖是說明在大徑端部就製造具有平行部的本發明 之異形材管的方法之圖，（a)是顯示整體立體圖，（b) 是顯示展開圖，（c )是顯示接近在（b )所示的展開圖的 梯形形狀之圖。 第9圖是顯示採用本發明的異形材管的其他的實施例 與此等的壓軸工具之圖，（a)是兼具整體立體圖的壓軸 工具的放大圖，（b )是兼具小徑側的放大圖的壓軸工具 的放大圖，（c )兼具採用此等的小徑側的密封工具的壓 軸工具的放大圖。 第10圖是顯示在液壓凸出加工物的小徑側具有矩形剖 面的情況所採用的本發明的異形材管的端面形狀之圖，（ a )是由小徑側端部朝軸方向僅離開SL + L0的位置之剖面 圖，（c )是管端部的剖面圖，（b )是在此等的中間位置 之剖面圖。 -27- 1267410 (24) 第11圖是顯示在液壓凸出加工物的大徑側具有矩形剖 面的情況所採用的本發明的異形材管的端面形狀之圖，（ a )是由大徑側端部朝軸方向僅離開δ!/ + L0’的位置之 剖面圖，（c )是管端部的剖面圖，（b )是在此等的中間 位置之剖面圖。 第1 2圖是在液壓凸出加工物具有梯形剖面的情況例示 其剖面形狀之圖。 第1 3圖是在液壓凸出加工物具有L字型的剖面的情況 例示其剖面形狀之圖。 第14圖是說明本發明方法的第1實施例.之圖，顯示異 形材管的管端部的平行部，在液壓凸出加工之前而形成的 情況。（a )是顯示對錐形管的模具本體的安裝狀態的剖 面圖，（b )是顯示在液壓凸出加工前形成平行部的狀態 的剖面圖，（c )是顯示在液壓凸出加工結束後的狀態的 剖面圖。 第15圖是顯示小徑側的上模具本體，兼具密封工具的 壓軸工具及異形材管端部的關係之圖，（a )〜（c )是相 當於上述第14(a)〜（c)圖之圖。 第16圖是顯示大徑側的上模具本體，兼具密封工具的 壓軸工具及異形材管端部的關係之圖，（a )〜（c )是相 當於上述第14(a)〜（c)圖之圖。 第17圖是說明本發明方法的第2實施例之圖，在將異 形材管的管端部的平行部對模具本體的安裝前，顯示預先 形成的情況。（a )是顯示對異形材管的模具本體的安裝 -28- 1267410 (25) 狀態的剖面圖，（b )是顯示液壓凸出加工前的狀態的剖 面圖，（c )是顯示液壓凸出加工結束後的狀態的剖面圖 〇 第1 8圖是說明本發明方法的第3實施例之圖，在將異 形材管的管端部的平行部對模具本體的安裝前，顯示預先 形成的情況的其他之例。（a )〜（c )是與上述第1 7圖的 情況相同。 第1 9圖是顯示本發明方法的第4實施例之說明圖’大 徑側的平行部的內側的模穴是顯示將大徑端作爲基準而朝 軸方向單調地增加的構成例。（a )〜（c )是與上述第1 7 圖的情況相同。 第2〇圖是顯示兼具本發明的液壓凸出加工裝置的構成 構件的密封工具之壓軸工具的構成例之圖。 [符號說明] 1、2…模具 3、 1 6…注入孔 4、 5、6、7、14、15…壓軸工具 11 ...異形材管 11a、lib、12a、12b、13a、13b、14a、15a …平 f了部 11 C ...轉移部 1 2、1 3 ...模具本體 14 b、15b .··端面 14c、15c ···突起 -29- (26) 1267410 1 4 d、1 5 d ...階段差 1 7 ...液壓凸出加工物 is... 〇 m -30-In the case of the shape shown in the above-mentioned sixth (a), for example, by using a "simple conical tube" as a material, the inner diameter is enlarged on the small diameter side, and the outer diameter is reduced on the large diameter side. Available for processing. Further, in the case of the shape shown in Fig. 6(b), it can be obtained by subjecting the long portion of the central body to the extrusion processing in addition to the above. In the description of the present invention, the "simple conical tube" is a material of the profile tube of the present invention, and means a conical tube in which parallel portions are not formed on one side or both ends. -13- 1267410 (10) In the case of the shape shown in the above-mentioned 7th (a), for example, the r-shaped simple tapered tube is used as the material, and the inner diameter is enlarged at the same time as the small-diameter side and the large-diameter side. It can be. Further, the case shown in Fig. 7(b) can be obtained by subjecting the long portion of the center body to extrusion processing in addition to the above. Figure 9 is a view showing another embodiment of the profiled pipe of the present invention and a finalizing tool used in the embodiment, wherein (a) is an overall perspective view, and (b) is an enlarged view of the small diameter side, (c) An enlarged view of a presser tool that has the above-described small-diameter side sealing tool. In the embodiment shown in Fig. 9, the pattern shown in Fig. 9 is a parallel portion 11a, 1 lb having a rectangular cross section formed at both ends of the tapered surface of the rectangular cross section. Further, in the embodiment shown in Fig. 9, the parallel portion 11a on the small-diameter side on the simple tapered tube is in the portion corresponding to δ L + L0, and the parallel portion lib on the large-diameter side is At a portion corresponding to δ!/ + L0', a rectangular cross section having a size of a width and a height substantially the same as that of the article is formed. Further, the radius of curvature R of the corner portion is determined in a manner to be described later, and the hydraulic projection processing is performed by the die bodies 12 and 13 and the finalizing tools 14 and 15 having the sealing tool, and the pressing shaft at the time of the hydraulic projection processing. It does not cause bending or the like, and can form a press of a very smooth material. Fig. 10 is a view showing the shape of the end face of the profiled pipe of the present invention used in the case where the small-diameter side of the hydraulically convex workpiece has a rectangular cross section, and (a) shows the direction from the small-diameter side toward the axial direction. Only the section leaving the position of SL+LO, (c) is the section showing the end of the tube, and (b) is the section showing the intermediate position. -14- (11) 1267410 That is, Fig. 10 is a view showing the shape of each cross section of the small-diameter side 1 @ parallel portion 11a of the profiled pipe of the present invention, and the profile from (a) to (C) The width W0 and height H0 are almost certain. Further, a stepwise change is formed by previously forming the radius of curvature R of the corner portion. As shown in Fig. 1 (a) to (c), the radius of curvature of the corner portion at the small-diameter side end portion is R0, and the small-diameter side end portion is separated from the position of SL + L0 in the axial direction. When the radius of curvature of the corner portion is R1 and the radius of curvature of the corner portion at the position where the small-diameter side end portion is apart from X only in the axial direction is R (X), the relationship of the following formula (1) is formed. R0 ^ R ( X ) ^ R1 (1) In the embodiment shown in Fig. 10, although the radius of curvature of the four corner portions of the respective sections is the same, it is not necessary to make the same. It is also possible to make different corners of curvature for each corner portion. Further, in detail, the both end portions of the simple tapered tube are used as the reference circumference, and the circumferential length difference Sd(x) at the position X from the tube end portion is obtained by the following formula (2). However, D0 indicates the outer diameter of the small diameter side, D0, and indicates the outer diameter of the large diameter side, and LT indicates the length of the tapered tube. 6d(x)=;T*(D0,-DO)·Χ/ LT (2) corresponds to the above-mentioned week when the cross section of the end portion is formed into a rectangle having a width W〇 and a height H0 by pre-forming. The length difference is 5d (x), and as shown in the first 〇 1267410 (12) diagram, a suitable pre-formed shape can be determined by changing the position of the radius of curvature R(X) of the corner portion in the axial direction. . Fig. 11 is a view showing the end surface shape of the profiled pipe of the present invention used in the case where the large-diameter side of the hydraulically convex processed product has a rectangular cross section, and (a) is the main portion of the large-diameter side toward the axial direction only. A cross-sectional view of the position leaving δ L' + L0 ', (c) is a cross-sectional view of the end of the tube, and (b) is a cross-sectional view at the intermediate position. In other words, Fig. 1 is a view showing the shape of each cross section of the parallel portion 1 lb on the large diameter side of the profiled pipe of the present invention, and the width W0' and height of the cross section from (a) to (c). H0' is almost certain. Further, a stepwise change is formed by previously forming the radius of curvature R' of the corner portion. As shown in Fig. 11 (a) to (c), the radius of curvature of the corner portion at the end portion on the large diameter side is R0 ', and the end portion on the large diameter side is separated from the δ!/ + DO' in the axial direction. When the radius of curvature of the corner portion of the position is R1' and the radius of curvature of the corner portion where the large-diameter side end portion is apart from X only in the axial direction is R '(X), the following is formed (1' ) relationship. R〇, S R' ( X ) S R1, (1' ) In addition, the circumferential length difference Sd(x) at the position X from the end of the tube is taken as the reference circumference of both ends of the simple tapered tube. It is obtained by the following formula (2'). However, D 〇 is the outer diameter of the small diameter side, D 0 ' is the outer diameter of the large diameter side, and LT is the length of the tapered tube. -16- 1267410 (13) δ(1(χ)=;Γ·(ϋ0' - DO ) ·Χ/ LT ".(2,) The profile of the end is formed as a wide WO', height HO' When the rectangle is rectangular, corresponding to the circumferential length difference δ (1 (X), and as shown in Fig. 11, by changing the size of the curvature radius R ' ( X ) of the corner portion in the axial direction, The shape is determined as described above. Although the description is made in the case where the hydraulically convex workpiece has a rectangular cross section, the profile tube of the present invention is not limited thereto, and even a rectangular combined shape or a polygonal shape may be employed. Further, it is possible to form a very stable press shaft during the hydraulic bulging process. Fig. 12 is a view showing a cross-sectional shape of the case where the hydraulic embossed workpiece has a trapezoidal cross-section. Fig. 3 is a view of the hydraulically convex workpiece having L In the case of the cross-sectional shape, the cross-sectional shape is exemplified. In either case, it is an example of a cross-sectional shape that is formed in advance on the large-diameter side, and (a) is only δΐ/ +LO in the axial direction from the large-diameter side end portion. a sectional view of the position, (c) is a sectional view of the end of the pipe, and (b) is a middle position at the same The hydraulic projection processing apparatus of the present invention and the hydraulic convex processing method using the hydraulic convex processing apparatus will be described with reference to the drawings. Fig. 14 is a view showing the first embodiment of the method of the present invention, showing The parallel portion of the tube end portion of the profiled tube is formed before the hydraulic projection processing. The same as (a) is a sectional view showing the mounting state of the tapered tube toward the mold body, and (b) is shown in the hydraulic convex processing. (c) is a cross-sectional view showing a state in which the parallel portion is formed, and (c) is a cross-sectional view showing a state after the completion of the hydraulic embossing process. -17- 1267410 (14) Fig. 15 is a view showing the upper mold body on the small diameter side, both The relationship between the finalizing tool of the sealing tool and the end of the profiled pipe is the same as (a) to (c), which corresponds to the above-mentioned l4(a) to (c). Fig. 16 shows the large diameter side. The upper mold body has a relationship between the pressure shaft tool of the sealing tool and the end portion of the profiled tube, and the same as (a) to (c) corresponds to the above-mentioned 14th (a) to (c). Figure 7 is a view showing a second embodiment of the method of the present invention, in which the tube of the profiled tube is The parallel portion of the portion shows the pre-% formation before the mounting of the mold body. The same as (a) is a cross-sectional view showing the mounted state of the profile tube to the mold body, and (b) is a state before the hydraulic projection is processed. (c) is a cross-sectional view showing a state after completion of the hydraulic embossing process. Fig. 18 is a view for explaining a third embodiment of the method of the present invention, in which the parallel portion of the tube end portion of the profiled tube is opposed to the mold Before the installation of the main body, other examples of the pre-formation are displayed. The same as (a) is a cross-sectional view showing the mounting state of the main body and the mold, and (b) is a state before the hydraulic projection is processed. The cross-sectional view, (c), is a cross-sectional view showing a state after the completion of the hydraulic projection processing. The hydraulic projection processing apparatus of the present invention includes, for example, upper and lower mold bodies 1 2 and 1 3 which form the cavity shown in Figs. 14 , 17 , and 18; The individual end portions of the mold bodies 1 2, 1 3 can be used to insert the front end portion of the press tool of the sealing tool 14, 15 . Then, the two mold bodies 12 and 13 and the presser tools 14 and 15 are constructed by holding both end portions of the profiled tube 11 of the present invention and holding them. -18- 1267410 (15) Further, an injection hole for the machining liquid may be provided in any one of the above-mentioned presser tools, and at least one of the end faces of the mold body (in the 14th, 17th, and the In the example shown in Fig. 8, the inner surface of the small-diameter side and the large-diameter side, and the outer surface of the final-axis tool corresponding to the inner surface of the end surface are respectively provided with parallel portions 12a, 12b, 13a, 13b, 14a. , 15a. The outer parallel portions 14a and 15a of the finalizing tools 14 and 15 restrain the material tube from the inner surface at the time of the pressing shaft, and also function to smooth the deformation. In the hydraulic embossing apparatus, the amount of the pressing shaft on the side of the small diameter portion is 5 L, the amount of the pressing shaft on the side of the large diameter portion is δ!/, and the length of the sealing on the side of the small diameter portion is L0, and the diameter is large. The seal on the side of the portion must have a length L0', and is provided on the end side of at least one of the two mold bodies 12 and 13 (the examples shown in Figs. 4, 17 and 18) are The lengths of the parallel portions 12a, 12b, 13a, and 13b on the inner surface of the small-diameter side and the large-diameter side are made of SL + L0 or more when placed on the small-diameter side. The case of the side is made to δ ΐ / + L0 ' or more. Similarly, the lengths of the parallel portions 14a and 15a of the presser tools 14 and 15 corresponding to the parallel portions 12a, 12b, 13a, and 13b provided in the mold bodies 12 and 13 are expected to be formed on the side of the small diameter portion. When SL + L0 or more is formed, it is made into L0' or more in the case of being provided in the large diameter part side. However, in the hydraulic embossing apparatus of the present invention, the tip end portion of the reamer tool 14 ( 15 ) which is a sealing tool having a small diameter side (large diameter side) is a simple material that must be inserted into the material for forming the profiled tube 11. The tapered tube PT or the small-diameter side end portion (large-diameter side end portion) of the profiled tube 11. At the same time, the parallel portion 14a (15a) is such that there is no gap between the foremost end portion of the parallel portion 14a (15a) -19-1267410 (16) and the inner surface of the profiled tube 11 at the end of the pressing shaft. . For this reason, for example, as shown in Fig. 14, the simple tapered tube PT forming the material of the profiled tube 11 is attached to the upper and lower mold bodies 12, 13, and is formed in the tube before the hydraulic projection processing is performed. When the parallel portions i la and lib of the end portions are formed in the upper and lower mold bodies 12 and 13, the finalizing tool having the sealing tool must satisfy the following conditions A and B. A. The finalizing tool 14 having the sealing tool on the small diameter side (see Fig. 15) The circumferential length SD0 of the envelope of the local concave portion of the distal end is ignored, and the following formula (3) is satisfied. SDO ^ (DO - 2t / cos0 ) χ π ... ( 3 ) However, DO: outer diameter t of the small diameter portion: the thickness of the profiled tube 11 tan = tan_1{ ( DO' - DO ) / ( 2* LT ) } LT : length DO' of the tapered pipe PT : outer diameter B of the large diameter portion - the pressure shaft tool 1 of the sealing tool having the large diameter side (see Fig. 16) The envelope of the local concave portion of the front end is ignored The circumference SD0' of the line satisfies the following formula (4). SDO' ^ (DO' - 2t / cos θ ) χ π (17) 1267410 On the other hand, as shown in Fig. 17 above, before being mounted on the upper and lower mold bodies 12, 13, in the profile tube 11 to be formed When the parallel portions 11a and 11b of the pipe end portion are formed in advance, the finalizing tool having the sealing tool satisfies the following conditions C and D. C. The finalizing tool 1 4 (see Fig. 17) that has the sealing tool on the small diameter side. The circumferential length SD0' of the distal end portion satisfies the following formula (5). SD 0 $ Parallel part 1 4 a circumference SD (5) D. The reaming tool 15 of the sealing tool with a large diameter side (refer to Fig. 17) The circumference SDO' of the front end portion satisfies the following (6) )formula. The circumference SD' of the parallel portion 15a of the SDO'g is (6) using the hydraulic projection processing apparatus of the present invention, and in the case of forming the hydraulically protruding workpiece 17, for example, as shown in the above-mentioned 14th (a), The simple tapered tube PT of the material of the profiled tube 11 of the present invention is mounted in a pair of mold bodies 12, 13 of the hydraulic projection processing apparatus. Next, before the hydraulic projection processing, the presser tools 14 and 15 having the sealing tool are moved in the axial direction, and as shown in Fig. 14(b), the mold bodies 12, 13 and the presser tools 14 and 15 are held. The -21 (10) 1267410 of the tapered tube ρτ forms a parallel portion 11a, lib at the tube end, or both ends, and is formed into the profiled tube 11 of the present invention. At this time, it is not necessary to make the timings of the pressing shafts of the profiled tubes 11 by the finalizing tools 14 and 15 the same. For example, the pressing of the pressing tool 14 may be started at a stage of pressing the pressing shaft tool 15 to some extent. Therefore, the profiled tube 11 is a timing in which a stable final shaft is selected in the mold bodies 1, 2, and 13. In this case, when the dimensions of the mold bodies 12 and 13 and the presser tools 14 and 15 having the sealing tool are designed as the reference dimensions, the presser tools 14 and 15 can be smoothly inserted into the tapered tube PT. In the state of the above-mentioned 14th (b), as shown in the 15th (b)th and the 16th (b), the two tube ends of the tapered tube PT are formed on the small diameter side L0 or more. In the parallel portion 11a and lib having a length of 3L+LO or more and a length L0' or more on the large diameter side, the profiled tube 11 of the present invention is obtained. Thereafter, the profiled pipe 11 is loaded with internal pressure in a state where the sealing of the machining liquid is completely performed. Next, while the internal pressure of the working fluid is raised, the finalizing tools 14 and 15 are moved in the axial direction, and the hydraulic projection processing is performed. As shown in the above-mentioned 14th (c), the hydraulic projection is formed by the method of the present invention. The workpiece 17 is a hydraulic projection process in which the profiled pipe 11 of the present invention is attached to the hydraulic projection processing apparatus of the present invention as a result of forming a pressurizable shaft, and is hydraulically convex by the method of the present invention. The processed material 17 is obtained to have a larger expansion ratio than ever. Further, as shown in the above-mentioned 4th (b), (19) 1267410, the end surface of the hydraulically-embossed workpiece 17 is perpendicular to the axial center, so that it can be easily joined to other parts and members. The way, and can form the position of the insertion bond. Fig. 19 is an explanatory view showing a fourth embodiment of the method of the present invention, and shows a configuration example in which the cavity on the inner side of the parallel portion on the large diameter side is monotonously increased in the axial direction with the large diameter end as a reference. (a) is a cross-sectional view showing a state in which the tapered tube is attached to the mold body, (b) is a cross-sectional view showing a state in which parallel portions are formed before the hydraulic bulging processing, and (c) is displayed at the end of the hydraulic bulging processing. A cross-sectional view of the state after. The embodiment shown in Fig. 19 has a different form from the embodiment shown in Figs. 14, 17 and 18. In other words, although the parallel portions 12a, 12b, 13a, and 13b are provided at both end portions of the two mold bodies 12 and 13, the mold holes on the inner side of the large-diameter side parallel portions 12b and 13b of the two mold bodies 12 and 13 are It is not locally narrowed as in the example shown in Fig. 14 and the like, and the cavity on the inner side of the parallel portions 12b and 13b is monotonously reduced in the axial direction with the large diameter end as a reference. In the configuration example shown in Fig. 19, since the resistance of the pressing shaft is small and it is advantageous for metal flow, the range of possible forming (expansion of the pipe expansion) can be expanded. Therefore, in the hydraulic embossing apparatus of the present invention, it is expected that the cavity shape of the mold bodies 1 2, 13 is designed to have the shape shown in Fig. 19. On the other hand, among the automobile parts, the cross-sectional shape of the end face of the product is close to a rectangular or rectangular combination, a polygonal shape, or the like, and has a complicated shape. -23- 1267410 (20) As described above, Fig. 18 is a view showing an embodiment of the case where the profiled tube 11 of the present invention shown in Fig. 9(a) is used, and when the processing is employed, The profiled material tube 11 shown in the above-mentioned Fig. 9(a) is attached to the mold bodies 12 and 13. Fig. 9(b) is an enlarged view showing the small diameter side of the profiled pipe 11 of the present invention. On the other hand, the cross-sectional shape of the small-diameter side parallel portion 11a is as shown in Fig. 10 described above. The profiled material pipe 11 having such a cross-sectional shape is formed by a presser tool 14 and 15 which together exhibit a sealing tool of an example of the present invention. That is, the ninth (C) diagram is a parallel shaft 1 having a width W0 - 2t, a height H0 - 2t, and a radius of curvature R 1 of the corner portion, although the pressure shaft tool 14 having the small diameter side sealing tool is shown. 4 a. The presser tool 1 4 , 15 is extruded at the end from the state of the above-mentioned 18th ( a ), and the end of the profiled pipe 11 is finished at the stage of the 18th (b), and is available at At the same time as the profiled material pipe 11 shown in the above-mentioned Fig. 9(b), the sealing of the working fluid under the internal pressure load is completely formed. Thereafter, the pressurizing tools 14 and 15 are moved in the axial direction while the internal pressure of the working fluid is increased, and the hydraulically convex workpiece of the method of the present invention which is subjected to the hydraulic convex processing can be obtained at 17°. The formation of the parallel portions 11a, lib of the pipe ends which are performed before the hydraulic bulging process may be formed in advance or may be carried out in the previous stage. It can be carried out by a conventional processing method such as reduction processing, hole expanding processing, swaging processing, or spin forming (s p i η n i n g) processing. -24 - 1267410 (21) Fig. 20 is a view showing a configuration example of a presser tool of a sealing tool which is a constituent member of the hydraulic convex processing apparatus of the present invention. (b) is a configuration example in which (a) is sealed by the end faces 14b and 15b which are in contact with the end faces of the profiled pipe 11, and (b) is a configuration example in which the projections 14c and 15c are given to the same end faces 14b and 15b. c) is a configuration example in which the step differences 14d and 15d are given to the boundary portions of the end faces 14b and 15b of the parallel portions 14a and 15a, and (d) is a configuration example in which the loops 18 are given to the parallel portions 14a and 15a. In any of the configuration examples shown in the 20th (a) to (d), the relationship between the parallel portions 14a and 15a and the distal end circumference shown by the above formulas (3) to (6) is satisfied. The above embodiment merely shows a specific example of the present invention, and the shape of the cavity of the mold bodies 1 2, 13 is only a relatively simple shape, and of course, it may be a complicated three-dimensional shape representing a typical automobile part. Further, in the above embodiment, although the pressing shaft is shown from both the large diameter side and the small diameter side, the present invention is applied to one side and the other side is performed by the prior art. For example, the method of the non-compressed shaft as shown in Fig. 1 above may be employed. Since the effect of the finale varies depending on the shape of the product, it is also possible to determine the scope of application of the present invention in accordance with the circumstances. In the above embodiment, it is mainly described that a simple tapered tube shape is used as the profiled material. In the case of the material of the tube 11, but in the case where the shape of the simple tapered tube is combined and welded, or the tapered tube is combined with a general straight tube, the both ends are respectively one of the simple tapered tubes. The parts are similar, and therefore can be applied as the material of the profiled pipe 11 of the present invention - 25 - (22) 1267410 [Industrial Applicability] The profiled pipe for hydraulic projection processing of the present invention has an outer diameter from the shaft A circumference in which one of the directions gradually increases or decreases to the other side, and a parallel portion is formed on at least one of the end sides. In the processing apparatus and the processing method using the profiled tube, a parallel portion is provided on at least one of the upper end inner surfaces of the upper and lower mold bodies and the outer surface of the presser tool corresponding to the end inner surface, and is mounted. In the mold, a combination of an internal pressure load and a presser shaft in the axial direction can be formed. Thereby, a larger expansion ratio can be obtained by performing a hydraulically protruding workpiece having a hydraulically convex processing. Further, it is also possible to form a joint that can be easily joined to other parts. As a vehicle, it is more applicable to a wide range of industrial machines. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a final process in a processing process for obtaining a hydraulic bulging process of a product using a conventional straight tube. Fig. 2 is a view for explaining a problem occurring in a case where a conventional reaming tool for a straight tube is used and a pressing shaft of a conventional conical tube is used. Fig. 3 is a view showing a hydraulic bulging process using a conventional tapered tube, (a) showing the state before processing ' (b) showing the state before the internal pressure load is pressurized, and (c) showing The state at the time of processing completion. Fig. 4 is a view for explaining a problem of joining a hydraulically protruding workpiece having a rectangular cross section, (a) showing the shape of a hydraulically convex workpiece using a conventional tapered tube, and (b) showing the present invention. Hydraulic projection -26- (23) 1267410 The shape of the workpiece, (c) is the cross-sectional shape showing this. Fig. 5 is a cross-sectional view showing an example of the shape of a tapered material pipe constituting the profile tube for hydraulic projection processing of the present invention. Fig. 6 is a view showing an overall configuration of a profiled pipe of the present invention, and (a) is an example in which a parallel portion having a circular cross section is formed at both ends of a tapered portion having a circular cross section. An example of a parallel portion having a rectangular cross section is provided at both ends of the tapered portion of the rectangular cross section. Fig. 7 is a view showing an overall configuration of another shaped pipe of the present invention, in which an example having a transfer portion is shown between a parallel portion on the large diameter side and a tapered portion at the center. Fig. 8 is a view for explaining a method of manufacturing a profiled pipe of the present invention having a parallel portion at a large diameter end portion, (a) showing an overall perspective view, (b) showing a developed view, and (c) showing a close proximity. (b) A diagram of the trapezoidal shape of the expanded view shown. Figure 9 is a view showing another embodiment of the profiled pipe of the present invention and the above-described finale tool, (a) is an enlarged view of the finale tool having an overall perspective view, and (b) is a small diameter side. An enlarged view of the finalizing tool of the enlarged view, (c) an enlarged view of the finalizing tool using the sealing tool on the small diameter side. Fig. 10 is a view showing the end surface shape of the profiled pipe of the present invention used in the case where the small-diameter side of the hydraulically convex workpiece has a rectangular cross section, and (a) is only left from the small-diameter side end portion in the axial direction. A cross-sectional view of the position of SL + L0, (c) is a cross-sectional view of the end of the tube, and (b) is a cross-sectional view at the intermediate position. -27- 1267410 (24) Fig. 11 is a view showing the shape of the end face of the profiled pipe of the present invention used in the case where the large-diameter side of the hydraulically convex workpiece has a rectangular cross section, and (a) is the large-diameter side. A cross-sectional view of the end portion in the axial direction away from δ!/ + L0', (c) is a cross-sectional view of the end of the tube, and (b) is a cross-sectional view at the intermediate position. Fig. 1 is a view showing a cross-sectional shape of a case where the hydraulically convex workpiece has a trapezoidal cross section. Fig. 13 is a view showing a cross-sectional shape of a case where the hydraulically convex workpiece has an L-shaped cross section. Fig. 14 is a view showing a first embodiment of the method of the present invention, showing a case where parallel portions of the pipe end portions of the profiled pipe are formed before the hydraulic projection processing. (a) is a cross-sectional view showing a mounted state of the mold body of the tapered tube, (b) is a cross-sectional view showing a state in which parallel portions are formed before the hydraulic convex processing, and (c) is displayed at the end of the hydraulic convex processing. A cross-sectional view of the state after. Fig. 15 is a view showing the relationship between the upper die body of the small-diameter side and the end of the sealing tool and the end of the profiled pipe, and (a) to (c) are equivalent to the above-mentioned 14th (a) to (c). ) The map of the map. Fig. 16 is a view showing the relationship between the upper die body of the large diameter side and the end of the sealing tool and the end portion of the profiled pipe, and (a) to (c) are equivalent to the above-mentioned 14th (a) to (c). ) The map of the map. Fig. 17 is a view for explaining a second embodiment of the method of the present invention, in which the display is formed in advance before the parallel portion of the tube end portion of the shaped material tube is attached to the mold body. (a) is a cross-sectional view showing the state of the mounting of the mold body of the profiled tube -28-1267410 (25), (b) is a sectional view showing the state before the hydraulic bulging processing, and (c) is a hydraulic bulging showing Cross-sectional view of the state after the completion of the processing Fig. 18 is a view for explaining the third embodiment of the method of the present invention, and the pre-formation is shown before the parallel portion of the tube end portion of the profiled tube is attached to the mold body. Other examples. (a) to (c) are the same as in the case of the above Fig. 17. Fig. 19 is a view showing an example of a configuration in which the inside of the parallel portion on the large-diameter side of the fourth embodiment of the method of the present invention is a configuration in which the large-diameter end is used as a reference and monotonously increases in the axial direction. (a) to (c) are the same as in the case of the above-described FIG. Fig. 2 is a view showing a configuration example of a presser tool of a sealing tool which is a constituent member of the hydraulic projection processing apparatus of the present invention. [Description of Symbols] 1, 2... Mold 3, 1 6... Injection Holes 4, 5, 6, 7, 14, 15... Axle Tool 11 ... Profile Tubes 11a, lib, 12a, 12b, 13a, 13b, 14a , 15a ... flat portion 11 C ... transfer portion 1 2, 1 3 ... mold body 14 b, 15b ... end surface 14c, 15c · · · protrusion -29- (26) 1267410 1 4 d, 1 5 d ... stage difference 1 7 ... hydraulically protruding workpiece is... 〇m -30-