1302854 - 九、發明說明： 【發明所屬之技術領域】 • 本發明是有關於一種金屬熱軋延的方法，且特別是有 關於-種可防止金屬熱軋延過程中，軋延板材翹曲：方 法。 【先前技術】 隨著金屬（或合金）板材的應用由傳統領域延伸至3c& • 《電產品後，對於板材的品質需求已不僅僅是基本的尺寸 精度，而是更進一步要求高難度的板形。 金屬板材在成形加工過程中，會受到外力作用而產生 應力，而材料内部各點所造成之應變不均勻會形成塑性變 形。此外，板材在成形加工過程中亦會因加熱或冷卻不均 勻產生之殘留應力而變形’因此板材軋延加工後的板形並 非完全平坦，常會有波（wave)及翹曲（wrap)等現象產生。 其中，波可分為邊波及中波，翹曲則可分為縱向麵曲伽i • 或 C〇il set)及橫向翹曲（Gutter或 Crossbow)， 這些變形大部 分皆是因為生產過程中的殘留應力所造成，故板材經輥軋 成形後還需經過整平的處理步驟。 目則一般的矩形板材在軋延過程中常形成嚴重的翹 曲，必須經過整平才能進行後續的加工，不僅影響成品的 口口 g ’更需耗費較多的時間及成本’因此需要開發出更好 的軋延方法，產生平坦的軋延成品以符合目前對板材的要 求0 1302854 【發明内容】 因此本發明就是在提供一種防止金屬熱軋延板材翹 曲的方法，用以解決傳統金屬熱軋延方法會有翹曲的現象 產生之問題。 根據本發明之目❸，提出一種防止金屬熱軋延板材翹 曲的方法，方法包含先形成一非矩形之金屬板材結構，再 進行熱軋延製程，可使板材沿軋延方向產生一延展量，軋1302854 - IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a method for hot rolling of a metal, and in particular to a method for preventing warpage of rolled sheet during hot rolling of a metal: method. [Prior Art] As the application of metal (or alloy) sheet extends from the traditional field to 3c & • After the electric product, the quality requirement for the sheet is not only the basic dimensional accuracy, but further requires the difficult board. shape. During the forming process, the metal sheet is subjected to an external force to generate stress, and the uneven strain caused by the various points inside the material forms a plastic deformation. In addition, the sheet will be deformed by the residual stress caused by uneven heating or cooling during the forming process. Therefore, the shape of the sheet after the sheet rolling process is not completely flat, and there are often waves and wraps. produce. Among them, the wave can be divided into side waves and medium waves, and the warp can be divided into longitudinal surface gamma • or C 〇 il set) and lateral warping (Gutter or Crossbow). Most of these deformations are due to the production process. Residual stress is caused by the flattening process after the sheet has been roll formed. The general rectangular plate often forms severe warpage during the rolling process, and must be leveled before subsequent processing, which not only affects the mouth of the finished product, but also requires more time and cost. Therefore, it is necessary to develop more A good rolling method produces a flat rolled product to meet the current requirements for the board. 0 1302854 [The present invention] Therefore, the present invention provides a method for preventing warpage of a metal hot rolled sheet to solve the conventional metal hot rolling. The extension method has problems with warping. According to the object of the present invention, a method for preventing warpage of a metal hot rolled sheet is proposed, which comprises forming a non-rectangular sheet metal structure and then performing a hot rolling process to produce a stretch in the rolling direction of the sheet. Rolling
延後呈現平坦的形狀。 根據本發明之上述目的，提出一種適用於熱乳延之板 材結構，可防止板材翹曲。本發明之板材結構為一多面 體：具有-第一軋延面及一第二軋延面，#中第一軋延面 與第二軋延面之間為平行相對，且第一軋延面之面積小應 於第二軋延面。 此外’此多面體之板材可具有 . 縱戳面，與第一 軋延面及第二軋延面為相交，此第_縱截面之形狀為一等 腰、非直角的四邊形。第-縱截面具有-對相等之第一相 鄰角及-對相等之第二相鄰角’且第二對相鄰角之角度小 於第-對相鄰角。此多面體之板材可更具有一第二縱截 面，係與第-縱截面呈相交，且第二縱截面之形狀可為矩 形或專腰梯形。 據上$可知本發明之方法係利用改變金屬札延板 ^的形狀，由傳統的矩形結構改變為—非矩形的多面體結 ’來改善金屬熱乳延過程中板材鍾曲的問題。由於本發 1302854 3i〇可為四邊形，具有一對互相平行之短底邊321及一長 底邊322，一對長度相等之腰邊331、-對由短底邊321 與腰邊331所形成之第一相鄰角341及一對由長底邊322 與腰邊331所形成之第二相鄰角342。其中，第二相鄰角 342之角度可為小於9〇度，或大於等於的度且小於卯度， 腰邊331可為曲線狀。 此外，本發明 < 非矩形板材結構可具有—第二縱截 面。第二縱截面與第3圖所示之第一縱截面呈垂直相交， 其形狀可為一四邊形，例如矩形或梯形。 口月參照第4圖’係繪示本發明一實施例之第二縱截面 示意圖。當第二侧面424與第一軋延面4ιι所形成之失角 441等於9〇度，且第二側面424與第二軋延面4i2所形成 之夾角442等於9〇度時，非矩形板材結構彻具有一第 一縱截面410 ’其形狀為矩形。 請參照第5圖，係緣示本發明另一實施例之第二縱截 面不意圖。當第二側面524與第一軋延面5ΐι戶斤形成之爽 角541大於90度’且第二側面似與第二乳延面512所 形成之夾角542小於9G度時’非矩形板材結構具有 一第二縱截面510,其形狀可為等腰梯形。 依照本發明提出之非矩形板材結構，加工形成一鋁材 作為軋延試片，並以-般傳統矩㈣㈣為比㈣，觀察 兩者軋延後的板材變形情形。 實驗所使用的軋延機為雙輥式輥壓機（two-high mill) ’輥輪直徑為150公釐，且輥輪可加熱至12〇%之溫 1302854 度，利賴軋延的方式進行軋延。 、田法在軋i刚先將矩形及本發明之非矩形的18材放入高 溫爐中加熱至320oc，曰和 且軋延機之輥輪溫度也加熱至 C乳延時均固定軋延速度且每次下軋量均固定在1.5 羞而所有.式片最終厚度約為1〇·5公釐，總厚度減縮率 (eduction ration)約& 68%。在軋延的過程中為了使材料溫 度，持在300 C〜320°C左右，因此採用循環的方式札延， 以每種板材下軋3公釐為_循環，將試片再度放入高溫爐Delayed to present a flat shape. According to the above object of the present invention, a sheet structure suitable for hot emulsion stretching is proposed to prevent warpage of the sheet. The sheet structure of the present invention is a polyhedron having a first rolling surface and a second rolling surface, wherein the first rolling surface and the second rolling surface are parallel to each other, and the first rolling surface is The area should be small on the second rolling surface. Further, the sheet of the polyhedron may have a longitudinally-marked surface intersecting the first rolling surface and the second rolling surface, and the shape of the first longitudinal section is an isosceles and a non-orthogonal quadrilateral. The first longitudinal section has a pair of equal first adjacent angles and - a pair of equal second adjacent angles ' and the second pair of adjacent corners has an angle smaller than the first-pair adjacent angle. The polyhedral sheet may have a second longitudinal section intersecting the first longitudinal section and the second longitudinal section may be a rectangular or a trapezoidal trapezoid. According to the above, the method of the present invention is to change the shape of the metal slab sheet from a conventional rectangular structure to a non-rectangular polyhedral knot ′ to improve the problem of sheet metal curvature during the hot lacquering process. Since the hair 1302854 3i can be quadrangular, has a pair of short bottom edges 321 and a long bottom edge 322 which are parallel to each other, and a pair of waist 331 of equal length, which is formed by the short bottom edge 321 and the waist edge 331. The first adjacent corner 341 and a pair of second adjacent corners 342 formed by the long base 322 and the waist 331. Wherein, the angle of the second adjacent corner 342 may be less than 9 degrees, or greater than or equal to and less than the twist, and the waist 331 may be curved. Further, the present invention <a non-rectangular sheet structure may have a second longitudinal section. The second longitudinal section intersects the first longitudinal section shown in Fig. 3 perpendicularly and may be in the shape of a quadrangle, such as a rectangle or a trapezoid. Referring to Figure 4, there is shown a second longitudinal cross-sectional view of an embodiment of the present invention. When the angle 441 formed by the second side surface 424 and the first rolling surface 4ι is equal to 9 degrees, and the angle 442 formed by the second side surface 424 and the second rolling surface 4i2 is equal to 9 degrees, the non-rectangular sheet structure The shape has a first longitudinal section 410' which is rectangular in shape. Referring to Figure 5, the second longitudinal section of another embodiment of the present invention is not intended to be used. When the angle 541 formed by the second side surface 524 and the first rolling surface 5 ΐ 户 大于 is greater than 90 degrees ′ and the angle 542 formed by the second side surface and the second emulsion surface 512 is less than 9 G degrees, the non-rectangular sheet structure has A second longitudinal section 510, which may be in the shape of an isosceles trapezoid. According to the non-rectangular sheet structure proposed by the present invention, an aluminum material is processed as a rolled test piece, and the deformation of the sheet after rolling is observed by using the conventional conventional moment (4) (4) as a ratio (4). The rolling mill used in the experiment is a two-high mill. The diameter of the roller is 150 mm, and the roller can be heated to 12〇% at a temperature of 1,302,854 degrees. Rolling. In the rolling process, the rectangular method and the non-rectangular 18 material of the present invention are first placed in a high-temperature furnace and heated to 320 oc, and the roller temperature of the rolling mill is also heated until the C-milk delay is fixed and the rolling speed is fixed. Each time the amount of rolling is fixed at 1.5 and all is. The final thickness of the sheet is about 1 〇 5 mm, and the total thickness reduction is about 68%. In the process of rolling, in order to make the temperature of the material, it is held at about 300 C~320 °C. Therefore, the cycle is carried out in a circular manner, and each sheet is rolled down to 3 mm for _cycle, and the test piece is again placed in a high temperature furnace.
中匣⑽奴時間，使其軋延溫度維持在3〇〇〇c〜32〇。匸左 右，以利軋延。 睛參照第6圖，為矩形之合金厚板以上述熱札延方法 進行軋延後的成品照片。第6圖（八)為傳統矩形軋延板材軋 延後整體板材之外觀變化俯視圖，第6圖⑺）為側視圖。結 果顯示斜邊夾角為90度之矩形板材軋延後，雖然沿軋 延方向有一延展之塑性變形，但軋延後板材會有嚴重的翹 曲現象產生，亦即並非為一平坦之軋延板材。 請參照第7圖，為具有不同斜邊夾角之非矩形板材進 行上述熱軋延製程後的成品照片。第7圖之斜邊夾角θ 2為63度’第7圖（B)為75度。由圖中可很明顯看出以本 發明之非矩形板材進行熱軋延後沿軋延方向有一延展 量，且軋延後板材皆呈現一平坦（flatness)的形狀，沒有翹 曲的現象產生。 由上述本發明之實施例可知，應用本發明之非矩形金 屬板材可確保熱軋延板材的品質，得到平坦的熱軋延成 1302854 • no 〇 本發明之結構為一特殊的非矩形結構，較傳統矩形結 構之板材更能配合軋延過程中在板材各部位所產生之不 同的應力應變速率。非矩形的結構使金屬板材在中心部份 有較大的塑性變形量，使得軋延試片之各部份能達到均勻 隻形，從而減少了生產過程中應力殘留所造成的趣曲現 象。 本發明之實施例於同樣條件下對傳統矩形板材及本 • 冑明之非矩形板材進行熱軋延製程，由兩種板材的軋延結 果可知，傳統矩开> 板材於熱軋延過程中會有赵曲現象產 生，對於後續加工及利用上皆造成困擾；而本發明之非矩 形結構金屬板材軋延後可呈現平坦的形狀，沒有翹曲的現 象產生，因此可得到平坦的熱軋延板材，不需再經過二次 加工來將板材整平，具有簡化製程、降低成本及控制品質 的優點。 ' 雖然本發明已以一較佳實施例揭露如上，然其並非用 • 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 •【圖式簡單說明】 ，為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下：Lieutenant (10) slave time, so that the rolling temperature is maintained at 3〇〇〇c~32〇.匸 Left and right, to facilitate rolling. Referring to Fig. 6, the finished product photograph of the rectangular alloy thick plate is rolled by the above-described hot-drawing method. Fig. 6 (8) is a plan view showing the appearance change of the entire rectangular rolled sheet after rolling, and Fig. 6 (7)) is a side view. The results show that after rolling of the rectangular sheet with the angle of the beveled edge of 90 degrees, although there is an extended plastic deformation along the rolling direction, the sheet will have a serious warpage after rolling, that is, it is not a flat rolled sheet. . Refer to Figure 7 for a photograph of the finished product after the hot rolling process for non-rectangular sheets with different bevel angles. The oblique angle θ 2 of Fig. 7 is 63 degrees. Fig. 7 (B) is 75 degrees. As is apparent from the figure, the non-rectangular sheet material of the present invention is subjected to hot rolling and has a stretch in the rolling direction, and the rolled sheet exhibits a flatness shape without warping. It can be seen from the above embodiments of the present invention that the non-rectangular metal sheet of the present invention can ensure the quality of the hot rolled sheet and obtain a flat hot rolling extension 1302854. • The structure of the present invention is a special non-rectangular structure. The traditional rectangular structure of the sheet material can better match the different stress and strain rates generated in the various parts of the sheet during the rolling process. The non-rectangular structure allows the sheet metal to have a large amount of plastic deformation in the center portion, so that the portions of the rolled test piece can be uniformly shaped, thereby reducing the interesting phenomenon caused by stress residual during the production process. According to the embodiment of the present invention, the conventional rectangular plate and the non-rectangular plate of the present invention are subjected to a hot rolling process under the same conditions, and the rolling result of the two plates can be known that the conventional moment opening > There is a phenomenon of Zhao Qu, which is troublesome for subsequent processing and utilization; and the non-rectangular structural metal sheet of the present invention can be flat shape after rolling, and no warping phenomenon occurs, so that a flat hot rolled sheet can be obtained. There is no need for secondary processing to level the board, which has the advantages of simplifying the process, reducing the cost and controlling the quality. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and various modifications and changes may be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.
11 1302854 第1A〜1C圖為本發明之非矩形板材結構示意圖。 第2圖係繪示本發明之一實施例的一種非矩形板材結 構的第一縱截面圖。 第3圖係繪示本發明之另一實施例的一種非矩形板材 結構的第一縱截面圖。 第4圖係繪示本發明之又一實施例的一種非矩形板材 結構的第二縱截面圖。 第5圖係繪示本發明之再一實施例的一種非矩形板材 結構的第二縱截面圖。 第6圖為傳統矩形之合金厚板進行軋延後的成品照 第7圖為不同斜邊炎角的非矩形合金厚板進行軋延後 的成品照片。 【主要元件符號說明】 100 ： 非矩形板材結構 111 ： 第一 軋延面 112 ： 第二軋延面 122 第一 側面 132 ： 夾角 134 夾角 136 ： 夾角 138 夾角 210 ： 第一縱截面 221 短底 邊 222 ： 長底邊 231 腰邊 241 ： 第一相鄰角 242 第一 相鄰角 310 ： 第一縱截面 321 短底 邊 322 ： 長底邊 331 腰邊 /11 1302854 1A to 1C are schematic views showing the structure of a non-rectangular sheet material of the present invention. Figure 2 is a first longitudinal cross-sectional view showing a non-rectangular sheet structure of an embodiment of the present invention. Figure 3 is a first longitudinal cross-sectional view showing a non-rectangular sheet structure of another embodiment of the present invention. Figure 4 is a second longitudinal cross-sectional view showing a non-rectangular sheet structure of still another embodiment of the present invention. Figure 5 is a second longitudinal cross-sectional view showing a non-rectangular sheet structure of still another embodiment of the present invention. Fig. 6 is a photograph of the finished product after rolling of a conventional rectangular alloy thick plate. Fig. 7 is a photograph of the finished product after rolling of a non-rectangular alloy thick plate of different oblique bevel angles. [Description of main component symbols] 100 : Non-rectangular sheet structure 111 : First rolling surface 112 : Second rolling surface 122 First side 132 : Angle 134 Angle 136 : Angle 138 Angle 210 : First longitudinal section 221 Short bottom edge 222: long base 231 waist 241: first adjacent angle 242 first adjacent angle 310: first longitudinal section 321 short bottom edge 322: long base 331 waist edge /
12 1302854 341 ： 第一相鄰角 400 ： 非矩形板材結構 411 ： 第一軋延面 424 ： 第二侧面 442 ： 夾角 510 ： 第二縱截面 512 ： 第二軋延面 541 ： 夾角 342 ： 第二相鄰角 410 ： 第二縱截面 412 ： 第二軋延面 441 ： 爽角 500 ： 非矩形板材結構 511 ： 第一軋延面 524 ： 第一軋延面 542 ： 夾角 1312 1302854 341 : first adjacent corner 400 : non-rectangular sheet metal structure 411 : first rolling surface 424 : second side surface 442 : angle 510 : second longitudinal section 512 : second rolling surface 541 : angle 342 : second Adjacent angle 410: second longitudinal section 412: second rolling plane 441: cool angle 500: non-rectangular sheet structure 511: first rolling surface 524: first rolling surface 542: angle 13