200909088 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種管材的加工方法’且特別是有關 於一種關於可提高經加工後金屬管材的強度與減輕重量 的加工方法。 【先前技術】 管材已經廣泛被應用各種工業產品中。如何能加工或 製出兼具高強度以及低重量的管材’一直是相關業界人 士長久研發與努力的目標。因此，管材的加工方法與材質 改良（如使用非金屬材質或於合金材質）也不斷地被提出。 劇烈塑性變形法（Severe Plastic Deformation，SPD)是 種k升金屬材料強度的加工方法。劇烈塑性變形法藉由 對材料產生大量的塑性變形，以改變材料的晶粒大小 (Gram Size)使材料的晶粒内產生大量的差排 (Dislocation)，藉由產生的差排來提高材料的強度。然而， 劇烈塑性形變法’如等通道角形變法（Equal Channel Angular Pressing，ECAP)僅可適用於對圓柱（Cylinder)或棒 材（Bar)的加工，並無法適用於管材（Tube)的加工。 請參照第la圖與第ib圖所示，基於利用大量的塑性 變形以於產生大量的差排來提高材料的強度的原理，現有 的官材加工方法是以抽管（Drawing)方式進行。管材1〇〇先 經退火處理後，於管材100的第一端11〇形成一抵靠部 120(如第la圖所示）。接著利用一衝頭2〇〇(piug)由管材1〇〇 200909088 的第二端130穿入管材loo中直到衝頭2〇〇抵靠於抵靠部 120(如第lb圖所示 利用衝頭200經由抵靠部120推動管材1〇〇進入一眼 模210的眼模孔220。當管材1〇〇通過眼模孔21〇時，受 眼模孔220的限制使管材100厚度縮小而產生大量的塑性 變形。待管材100全部通過眼模孔22〇後，由管材1〇〇第 二端130拉出管材1〇〇。 再利用衝頭200經由抵靠部12〇推動管材1〇〇進入另 一眼模的眼模孔（内徑縮小;)後抽出。如此反覆直到管材 達到預定的厚度為止。 凊參照第2a圖至第2c圖所示，現有的管材加工方法 是將利用衝頭200經由抵靠部120反覆推動管材1〇〇的第 —端110進入眼模孔，即管材1〇〇是單方向進行加工。此 種做法僅可於管材100的晶粒14〇間的相同方向的滑移面 141(Slip Planes)附近產生差排142，產生的差排142數量 與效果有限，因此影響了管材強度的提升。 【發明内容】 、因此本發明的目的就是在提供一種管材的加工方 法二用以增加管材的整體強度，同時減少管材的厚度 低官材的整體重量。 总依照本發明一實施例的一種管材的加工方法，包含對 山材，行順向抽管程序，順向抽管程序係沿管材的第— ^到第二端的方向抽拉管材。接著，將管材反轉以進行— 200909088 反向抽管程序，反向抽管程序係沿管材第二端到第一端的 ^向抽拉該管材。如此，重複順向抽管程序以及反向抽管 程序，直到該管材達到一預定厚度為止。 μ依照本發明-實施例的一種管材的加工方法，包含將 官材由其第—端通過—第―眼模孔後抽出管材，其中第一 眼模孔的直徑小好材的外徑。接著，將管材反轉由立第 二端通過-第二眼模孔後抽出管材，其_第二眼模孔的直 徑小於管材的外徑。重複前述步驟，直到管材達到一預定 厚度為止。 依照本發明一實施例的一種管材的加工方法，包含形 成第-抵#部於管材的第—端後，使用第—衝頭由管材的 第一端穿入管材直到第一衝頭抵靠於第一抵靠部，並推動 管材通過眼模孔後抽出管材，其中第-衝頭的外徑大於管 材的内徑。 接著，去除第-抵靠部後，形成第二抵靠部於管材的 第二端。再使用第二衝頭由管材的第一端穿入管材直到第 ΐ衝頭抵#於第二抵靠部，並推動管材通過目《孔後抽出 g材，其中第二衝頭的外徑大於管材的内徑。 接著去除該第二抵靠部，並重複前述步驟，直到該 管材達到一預定厚度為止。 由上述本發明較佳實施例可知，應用本發明所能達成 的功效在於： 透過反覆由管材的第一端與第二端推動進入管材眼 模孔’即管材是雙方向進行加卫。可於管材的晶粒内的不 200909088 同方向的滑移面（Slip planes)，如第一滑移面以及第二滑移 面附近產生大量的差排，產生的差排可㈣加管^強 度’同時降低管材整體的重#。亦即，在符合相同強度的 要求下，可使管材的厚度減低’以同時降低管材整體的重 量。 【實施方式】 依照本發明一較佳實施例的一種管材的加工方法，係 將管材由其第一端通過眼模的眼模孔後抽出，再將管材反 轉由其第二端通過眼模的眼模孔後抽出。再將管材反轉由 其第-端通過眼模的眼模孔後抽出。如此重複前述步驟， 直到該管材朗-預定厚度為止。f材可為Kf、方管或 是多角管等金屬管。 請參照f 3a圖至第孔圖所示’在一實施例中，係維 持管材的⑽，而改變管们⑽的輕，達到縮小管 材300厚度以減少整體重量並增加強度。 管材綱經退火處理後，於管材300的第-端310形 成一第一抵靠部311。第-抵靠部311是將管材300的第 -端310加工縮限管徑形成。而後進行管材綱表 處理。 再使用衝頭700由官材3〇〇的第二端32〇穿入管材 300直到衝5頁700抵罪於第一抵靠部3ΐι時，衝頭雇 可藉由油屋帶動，並推動管材3〇〇由其第-端31〇通過眼 模_(第-眼模）的眼模孔41〇後抽出管材獨。將第—抵 200909088 靠部311去除（如第3c圖所示）。 請參照第4a圖至第4圖柏_ 弟4c圖所不，於管材300的第二端 320形成一第二抵靠邱】 _ *邛321。相似的，第二抵靠部321是 將官材300的第-唑, ―鳊320加工縮限管徑形成（如第4a圖所 示）。200909088 IX. Description of the Invention: [Technical Field] The present invention relates to a method of processing a pipe and particularly relates to a processing method for improving the strength and weight reduction of a processed metal pipe. [Prior Art] Pipes have been widely used in various industrial products. How to process or produce pipes with high strength and low weight has always been the goal of long-term research and development by relevant industry personnel. Therefore, pipe processing methods and material improvements (such as the use of non-metallic materials or alloy materials) are also constantly being proposed. Severe Plastic Deformation (SPD) is a processing method for the strength of k-liter metal materials. The severe plastic deformation method produces a large amount of plastic deformation in the material by changing the grain size of the material by changing the grain size of the material (Gram Size), thereby increasing the material by the difference. strength. However, the severe plastic deformation method, such as Equal Channel Angular Pressing (ECAP), can only be applied to the machining of cylinders or bars, and cannot be applied to the processing of pipes. Referring to the first and second ib diagrams, the conventional method of processing the official material is based on the drawing method based on the principle of using a large amount of plastic deformation to increase the strength of the material by generating a large amount of the difference. After the tube 1 is annealed, an abutting portion 120 is formed at the first end 11 of the tube 100 (as shown in Fig. 1a). Then, a second end 130 of the pipe 1〇〇200909088 is inserted into the pipe loo by a punch 2 piug until the punch 2 is abutted against the abutment 120 (using the punch as shown in FIG. The tube 1 is pushed into the eye mold hole 220 of the eye mold 210 via the abutting portion 120. When the tube 1 is passed through the eye mold hole 21, the thickness of the tube 100 is reduced by the restriction of the eye mold hole 220 to generate a large amount. Plastic deformation: After the pipe 100 is completely passed through the eye mold hole 22, the pipe 1 is pulled out from the second end 130 of the pipe 1 再. The punch 200 is then used to push the pipe 1 through the abutting portion 12 to enter the other eye. The eye mold hole of the mold (the inner diameter is reduced;) is taken out. This is repeated until the tube reaches a predetermined thickness. 凊 Referring to Figures 2a to 2c, the conventional pipe processing method is to use the punch 200 by abutting The portion 120 repeatedly pushes the first end 110 of the tube 1 into the eye mold hole, that is, the tube 1〇〇 is processed in one direction. This method can only be used in the same direction of the sliding surface between the grains 14 of the tube 100. A difference row 142 is generated near 141 (Slip Planes), and the number and difference of the resulting rows 142 are limited. Therefore, the improvement of the strength of the pipe is affected. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for processing a pipe material for increasing the overall strength of the pipe material while reducing the overall thickness of the pipe material and the overall weight of the pipe material. A method for processing a pipe according to an embodiment of the present invention comprises the step of pipetting a pipe in the direction of the mountain material, and the pipe drawing process is to draw the pipe along the direction from the first to the second end of the pipe. Then, the pipe is reversed. To carry out - 200909088 reverse pipetting procedure, the reverse pipetting procedure draws the pipe along the second end of the pipe to the first end. Thus, the forward pipetting process and the reverse pipetting process are repeated until the The pipe material reaches a predetermined thickness. The method for processing a pipe according to the present invention includes the step of withdrawing the pipe material from the first end thereof through the first-eye hole, wherein the diameter of the first eye die hole is small. The outer diameter of the good material. Then, the pipe is reversed from the second end to the second eye hole, and the pipe is taken out, and the diameter of the second eye hole is smaller than the outer diameter of the pipe. Repeat the foregoing steps. Until the tube reaches a predetermined thickness, a method for processing a pipe according to an embodiment of the present invention includes forming a first portion of the pipe after the first end of the pipe, and inserting the pipe from the first end of the pipe using the first punch Until the first punch abuts against the first abutting portion, and pushes the pipe through the eye die hole, the pipe is taken out, wherein the outer diameter of the first punch is larger than the inner diameter of the pipe. Then, after the first abutting portion is removed, the formed The second abutting portion is at the second end of the pipe. The second punch is used to penetrate the pipe from the first end of the pipe until the second punch reaches the second abutting portion, and the pipe is pushed through the hole. The g material, wherein the outer diameter of the second punch is larger than the inner diameter of the pipe. Then the second abutting portion is removed, and the foregoing steps are repeated until the pipe reaches a predetermined thickness. It will be apparent from the above-described preferred embodiments of the present invention that the effect achieved by the application of the present invention is that the tube is urged into the tubular eye hole by the first end and the second end of the tube, i.e., the tube is reinforced in both directions. Slip planes in the same direction of the 200909088, such as the first slip surface and the second slip surface, can generate a large number of difference rows in the grain of the pipe, and the resulting difference can be (4) 'At the same time reduce the overall weight of the pipe #. That is, the thickness of the pipe can be reduced by the same strength requirement to simultaneously reduce the overall weight of the pipe. [Embodiment] A method for processing a pipe according to a preferred embodiment of the present invention is to take a pipe from a first end thereof through an eye die hole of an eye mold, and then invert the pipe from the second end thereof through the eye mold. The eye hole is pulled out. The tube is then inverted by its first end through the eye mold hole of the eye mold. The foregoing steps are repeated as such until the tube is Lang-predetermined thickness. The f material may be a metal tube such as a Kf, a square tube or a polygonal tube. Referring to Fig. 3D to Fig. 3, in one embodiment, the tube (10) is maintained, and the lightness of the tubes (10) is changed to reduce the thickness of the tube 300 to reduce the overall weight and increase the strength. After the tube material is annealed, a first abutting portion 311 is formed at the first end 310 of the tube 300. The first abutting portion 311 is formed by processing the first end 310 of the tube 300 to a reduced diameter. Then the pipe list is processed. The punch 700 is then passed through the tubular end 300 from the second end 32 of the official material 3〇〇 until the fifth page 700 is in the first abutment portion 3ΐ, the punch can be driven by the oil house and push the pipe 3〇 The 〇 is pulled out from the eye mold hole 41 of the eye mold _ (the first eye mold) by the first end 31 〇, and the tube is taken out. The first part of the 200909088 is removed (as shown in Figure 3c). Referring to Fig. 4a to Fig. 4, the second end 320 of the tube 300 forms a second abutment _ * 邛 321 . Similarly, the second abutting portion 321 is formed by processing the azole of the official material 300, and the size of the tube is reduced (as shown in Fig. 4a).
V 吏用衝頭700由管材300的第一端310穿入管材 3〇〇’直至衝頭·抵靠於該第二抵靠部321。相似的，衝 頭7〇0可藉由油壓帶動，並推動管材300由其第二端320 L過眼模500(第一眼模)的眼模孔51〇後抽出管材。將 第二抵靠部321去除（如第乜圖所示）。 口月 > ’’、、第5a圖至第5c圖所示，重複前述步驟，於管 材3〇0的帛# 31G形成第三抵靠部313(如第5a圖所 示）。再使用衝頭彻由管材3〇〇的第二端32〇穿入管材 3〇0 ’直到衝頭700抵靠於第三抵靠部313時，衝頭700 可藉由油壓帶動’並推動管材_由其第-端31〇通過眼 模_(第三眼模）的眼模孔_後抽出管材3〇〇。直到管材 300達到一預定厚度為止。 一晴參照帛6a 至第6c圖所示，依照本發明實施例的 官材加工方法，反覆由管材3〇〇的第一端310與第二端320 推動進人管材眼模孔，即管材是雙方向進行加工。此 種ί!法了於每材3〇〇的晶粒330内的不同方向的滑移面 (Slip planes) ’如第一滑移面331以及第二滑移面332附近 產生大量的差排333,產生的差排333以增加管材3〇()的 強度’同時降低管材300整體的重量。 200909088 請參照S 7a圖至帛7b圖所示，管材3〇叫 揭露的圓管外，也可應用於非圓管、多角管如四 ^= 或是六角管等金屬管。The V-punch 700 is threaded from the first end 310 of the tube 300 into the tube 3〇〇' until the punch abuts against the second abutment 321 . Similarly, the punch 7〇0 can be driven by the oil pressure and push the tube 300 from its second end 320 L through the eye mold hole 51 of the eye mold 500 (first eye mold) and then withdraw the tube. The second abutting portion 321 is removed (as shown in the figure). The mouth portion > ', and the 5a to 5c views are repeated, and the third step 313 is formed on the 帛# 31G of the tube 3〇0 (as shown in Fig. 5a). The punch is then passed through the second end 32 of the tube 3〇〇 into the tube 3〇0' until the punch 700 abuts against the third abutment 313, and the punch 700 can be driven and pushed by the oil pressure. The tube_from its first end 31〇 passes through the eye mold hole_ of the eye mold_(third eye mold) and the tube 3〇〇 is withdrawn. Until the tube 300 reaches a predetermined thickness. As shown in FIG. 6a to FIG. 6c, the processing method of the official material according to the embodiment of the present invention is repeatedly pushed from the first end 310 and the second end 320 of the pipe 3 into the hole of the pipe of the human pipe, that is, the pipe is Processing in both directions. This method produces a large number of rows 333 in the vicinity of the first slip surface 331 and the second slip surface 332 in the different directions of the slip planes 331 in each of the three dies. The resulting difference row 333 is used to increase the strength of the tube 3 〇 () while reducing the overall weight of the tube 300. 200909088 Please refer to the S 7a to 帛7b diagrams. The pipe 3 is also used for non-circular pipes, multi-angle pipes such as four ^= or hexagonal pipes.
實施例I 以加工7050 A1_Zn_Mg|g管為例說明。抽 管材的原始外徑為31毫米（_，内徑為25以，^: 度為3毫米，原始管長為25〇毫米。加工製作後 : :=毫她、）’而編料25毫米，管壁^ 首先’管⑽退火處理（可使用財的 材加熱至43UC溫—小時，爐冷） 丨如將吕 的第-端的25毫米長度部分經加工縮管形成:： 部。而後進行管材表面矣化處理(可 第抵靠 管材經表面清洗後，將管材進置於硫化油卜^亦即 ^材表面附者一層含息的固態潤。 抽^加工所使用的設備，包含 眼模兩副(第-副眼模的眼模孔2: ;(75馬力)、 模的眼模孔直徑為28毫乎 毫未、第二副眼 米，其長度為i公尺。^衝頭直㈣定為25毫 衝碩藉由油壓帶動，可以 管材。則第-次抽管方向為由管材__5(^尺紛鐘)推動 端’亦即衝頭進人管材的第 、—端往管材的第- 與管材-起通過眼模孔(直料 =進至第-端。當衝頭 二 亳米）時，由於衝頭直徑 10 200909088 專於原g’材内徑，而眼模孔徑小於管材外徑（外徑為3 1毫 米）’故對管材進行抽拉而通過眼模。待第二端亦通過眼模 後則疋成第一次抽拉。第一次抽拉在不改變管材内徑的 凊況下，將菅材外徑由原先的3丨毫米縮減至29毫米，亦 即管材被拉長且厚度變薄。再進行第二次抽管。 在第一次抽管前，先將第一抵靠部切除，並在第二端 形成第—抵罪部。第二次抽管方向為由管材的第一端往管 材的第二端方向（與第一次抽管方向相反）。此時，採用第 ^副眼模’其眼模孔徑為28毫米。此時衝頭直徑仍為25 毫米，長1公尺。 衝頭藉由油壓帶動，可以前進速率5(公尺/分鐘）推動 管材。衝頭進人由管材的第—端前進第二端。#衝頭鱼管 材-起通過眼模孔時，此時由於眼模孔徑（為28毫米）小於 原管材外徑（為29«米），故對f材進行抽拉而通過眼模， 待第一端亦通過眼模後，則完成第二次抽拉。第二文抽、拉 進二步減小管材外徑至28毫米，將㈣㈣仍為原先的 25毫米，亦即管材被拉長且厚度變薄至15毫米。 以加工7050 Al-Zn-Mg鋁管為例說明。抽管 ， 銘管的原始外徑31毫米（mm)，内徑25毫米，管辟厚^ 毫米’原始管長250毫米。藉抽f製作加卫後，銘土管^徑 =31毫米’而内徑變為28毫来’管厚度為Μ毫米的 200909088 首先，管材經退火處理（可使 材加熱至430度C溫一小時，爐4有的製程，例如將管 的第—端的前25毫米部分經打頭縮)敦使材料軟化。管材 而後谁杆其姑 、s形成第—抵靠部。 材表面與内面的4化處理（可使 .亦即管材《料洗後，好 化石臘等槽申，使管材表面與内面附著油月曰、氯 滑層）。 w者層含皂的固態潤 抽管加卫所使㈣設傷，包含抽管機_ =副(眼模孔直徑31毫米，與銘管外 」 其中衝頭直徑分別為26毫来、27㈣以及28 毫未，長皆為1公尺。 第一衝頭（直徑為26毫米）藉由油盤帶動，可以為前進 5(公尺/分鐘）進入並推動管材。第—次抽管方向為由 官材的第二端往管材的第一端方向，亦即第一衝頭由管材 :苐二端進入管材而前進至第一端。因為第一衝頭前端有 /度，其形狀較尖，且由於齡金具備不錯的塑性能力，故 在加工時首先在眼模前置—金屬檔板。管材第—端先抵住播 板，第一衝頭由管材的第二端強制插入管材，一直至第一衝 頭，靠於第-抵靠部後。而後，移開金屬檔板，第—衝頭推 動i材由第知而第二端先後通過眼模孔。第一衝頭與管 材起通過眼模孔時，由於衝頭直徑（直徑為26毫米）大於 原管材内徑（内徑為25毫米），故對管材進行抽拉而通過眼 楔。待第二端亦通過眼模後，則完成第一次抽拉。此次抽 拉在不改變管材外徑的情況下，將管材内徑由原先的25 12 200909088 定米：増至26宅米，亦即管材被 緊接著進行第二次抽管； ^且厚度變薄。 一抵靠部（第一端）切除，並 一次柚管前，先將原第 部。第二次抽管方向為由管材的&第—的端第二端形成第二抵靠 抽管方向相反）。眼模孔徑 端（與第一次 頭（直徑為27毫米）。第二衝頭此時改換第二衝 攸尺/分鐘）進人管材。即由壓帶動，前進^率 第二抵靠部時為止。 、 端進入至抵靠於 Η為第：—起通觀模料，由於第二衝頭直 抽“通過眼模。待管材;：:：故=行 =拉。此次抽拉在不改變管材外徑的情況下，= 徑由原先的26毫米擴增至27ΐ半女 將吕材内 度變薄至2毫米。毫水，亦即管材被拉長且厚 =第三次抽管前，材料可經退火（2〇〇〇c，恒溫Μ小 内=冷），退火後’材料如上述之息化方式，進行表面與 的4化濁滑處理。切除第二抵靠部（第二端），在於管 1第—端形成-新的第-抵靠部。此次抽管(第三次抽)方 π為由管材的第二端往第一端，亦即第三衝頭進入管材第 —端而前進至第一端。第三衝頭與管材一起通過眼模孔 時，由於第三衝頭（直徑為28毫米）大於管材内徑（27毫 米），故對管材進行抽拉而通過眼模。待管材第二端亦通過 眼模，則完成第三次抽拉。此次抽拉在不改變管材外徑的 情況下，將管材内徑由原先的27毫米擴增至28毫米，亦 13 200909088 即管材被拉長且厚度變薄至15毫米。 、雖;、、:本發明已以數較佳實施例揭露如上，然其並非用 站疋本發明，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 護範圍當視後附之切專·_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： 第la圖係繪示應用現有的管材加工方法的管材示意 圖。 、 第lb圖係繪示現有的管材加工方法的示意圖。 第2a圖到第2c圖係繪示依照現有的管材加工方法， 管材内產生差排的示意圖。 第3a圖到第3c圖係繪示依照本發明一實施例的管材 加工方法，於一順向抽管程序的流程示意圖。 第4a圖到第4c圖係繪示依照本發明實施例的管材加 工方法，於一反向抽管程序的流程示意圖。 第5a圖到第5c圖係繪示依照本發明實施例的管材加 工方法’於順向抽管程序的流程示意圖。 第6a圖到第6c圖係繪示依照本發明實施例的管材力口 工方法’管材内產生差排的示意圖。 第7a圖係繪示依照本發明一實施例的管材加工方 14 200909088 法，管材截面的示意圖。 第7b圖係繪示依照本發明一實施例的管材加工方 法，管材截面的示意圖。 【主要元件符號說明】 100 :管材 110 :第一端 120 ··抵靠部 130 :第二端 140 :晶粒 141 :滑移面 142 :差排 200 :衝頭 210 :眼模 220 :眼模孔 300 :管材 310 :第一端 3 11 :第一抵靠部 313 :第三抵靠部 320 :第二端 321 :第二抵靠部 3 3 0 .晶粒 331 :第一滑移面 332 :第二滑移面 333 :差排 400 :眼模 410 :眼模孔 500 :眼模 510 :眼模孔 600眼模 610眼模孔 700衝頭 15Example I illustrates the processing of a 7050 A1_Zn_Mg|g tube as an example. The original outer diameter of the drawn pipe is 31 mm (_, the inner diameter is 25, the ^: degree is 3 mm, the original pipe length is 25 mm. After processing: := milli she,)' and the material is 25 mm, the tube Wall ^ First 'tube (10) annealing treatment (can be used to heat the material to 43 UC temperature - hour, furnace cooling) For example, the 25 mm length of the first end of the Lu is processed into a shrink tube::. Then, the surface of the pipe is deuterated (the pipe can be placed on the vulcanized oil after the surface is cleaned by the surface, and the surface of the material is attached to the surface of the material.) Two pairs of eye molds (the eye mold hole of the first-second eye mold 2: ; (75 hp), the diameter of the eye mold hole of the mold is 28 millimeters, the second secondary eye meter, and its length is i meters. The head straight (four) is set to 25 milligrams. The oil can be driven by oil pressure, and the pipe can be piped. The direction of the first pipe is the pipe that is driven by the pipe __5 (^尺纷钟), that is, the first part of the pipe into the pipe. The end of the pipe - the pipe - through the eye hole (straight material = into the first end. When the punch is two meters), because the diameter of the punch 10 200909088 is dedicated to the original g' material inner diameter, and the eye The die diameter is smaller than the outer diameter of the pipe (outer diameter is 31 mm). Therefore, the pipe is drawn through the eye mold. After the second end passes through the eye mold, it is pulled for the first time. The first pull is at Without changing the inner diameter of the pipe, the outer diameter of the coffin is reduced from the original 3 mm to 29 mm, that is, the pipe is elongated and the thickness is thinned. Before the first pipe drawing, the first abutting portion is cut off, and a first conviction portion is formed at the second end. The second pipe drawing direction is from the first end of the pipe to the second end of the pipe ( In the opposite direction of the first pipe drawing. At this time, the second eye mold is used, and the hole diameter of the eye mold is 28 mm. At this time, the diameter of the punch is still 25 mm and the length is 1 meter. The punch is driven by oil pressure. The pipe can be pushed at a forward speed of 5 (meters per minute). The punch enters the second end of the pipe by the first end. #冲头管材- When passing through the eye hole, at this time due to the eye mold aperture (for 28 mm) is smaller than the outer diameter of the original pipe (29« m), so the f material is pulled through the eye mold, and after the first end passes through the eye mold, the second extraction is completed. Pull in two steps to reduce the outer diameter of the pipe to 28 mm, and (4) (4) is still the original 25 mm, that is, the pipe is elongated and the thickness is reduced to 15 mm. The 7050 Al-Zn-Mg aluminum tube is taken as an example. The original diameter of the pipe is 31 mm (mm), the inner diameter is 25 mm, and the pipe thickness is 2.5 mm. The original pipe length is 250 mm. Ming soil pipe diameter = 31 mm 'and inner diameter becomes 28 millimeters' 200909088 of tube thickness Μ mm First, the pipe is annealed (the material can be heated to 430 ° C for one hour, the furnace 4 has a process, for example The first 25 mm part of the first end of the tube is made to be softened by the head. The tube is then bent and the s is formed into the first part. The surface of the material and the inner surface are treated. After the material is washed, it is good to make the wax and other grooves apply, so that the surface of the pipe and the inner surface are attached with oily lunar sputum and chlorine slip layer. The w layer is composed of solid-state moisturizing pipe with soap and sanitation. (4) Injury, including pipe drawing machine _ =Sub (eye mold hole diameter 31 mm, and the outside of the tube) The diameter of the punch is 26 millimeters, 27 (four) and 28 millimeters, and the length is 1 meter. The first punch (26 mm in diameter) is driven by the oil pan and can enter and push the pipe for 5 (meters per minute). The first pipe drawing direction is from the second end of the official material to the first end of the pipe, that is, the first punch is advanced from the pipe to the first end by entering the pipe at the two ends. Because the front end of the first punch has a / degree, its shape is sharp, and because of the good plasticity of the age, it is first placed in front of the eye mold - metal baffle. The first end of the pipe is placed against the broadcast plate, and the first punch is forcibly inserted into the pipe from the second end of the pipe until the first punch, after the first-butting portion. Then, the metal baffle is removed, and the first punch pushes the i material from the first and the second end passes through the eye hole. When the first punch and the pipe pass through the eye die hole, since the diameter of the punch (26 mm in diameter) is larger than the inner diameter of the original pipe (the inner diameter is 25 mm), the pipe is pulled and passed through the eye wedge. After the second end passes through the eye mold, the first pull is completed. The drawing does not change the outer diameter of the pipe, the inner diameter of the pipe is set from the original 25 12 200909088: 増 to 26 house meters, that is, the pipe is followed by the second pipe; ^ and the thickness is changed thin. An abutment (first end) is removed, and the first part of the grapefruit tube is used first. The second direction of the tube is formed by the second end of the <the end of the tube forming a second abutting direction of the tube oppositely). The eyepiece aperture end (with the first head (27 mm diameter). The second punch is now changed to the second stroke/min) to enter the tubing. That is, it is driven by the pressure, and the advancement rate is as long as the second abutment portion. The end enters to abut against the cockroach as the first: - the tongs view mold material, because the second punch straight draws "through the eye mold. Waiting for the pipe;::: Therefore = line = pull. This pull does not change the pipe In the case of the diameter, the diameter is expanded from the original 26 mm to 27 ΐ half of the female to reduce the internal temperature of Lu to 2 mm. The water is too long, that is, the pipe is elongated and thick = before the third pipe, the material can be After annealing (2〇〇〇c, constant temperature Μ small inside = cold), after annealing, the material is subjected to the surface and the turbidity treatment. The second abutting portion (second end) is removed. The first end of the tube 1 forms a new first abutting portion. The pipe (the third pumping) is π from the second end of the pipe to the first end, that is, the third punch enters the pipe first. Advancing to the first end. When the third punch passes through the eye mold hole together with the pipe, since the third punch (28 mm in diameter) is larger than the inner diameter of the pipe (27 mm), the pipe is drawn through the eye. The third end of the tube is also passed through the eye mold, and the third extraction is completed. The pulling of the tube does not change the outer diameter of the tube, and the inner diameter of the tube is from the original 27 mm is expanded to 28 mm, also 13 200909088, that is, the pipe is elongated and the thickness is thinned to 15 mm. Although, the present invention has been disclosed in the preferred embodiments as above, but it is not Any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is subject to the definition of the latter. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more apparent and <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> the detailed description of the drawings is as follows: Figure la is a schematic view of a pipe using an existing pipe processing method. Fig. 1b is a schematic view showing a conventional pipe processing method. Fig. 2a to Fig. 2c are schematic views showing a difference between the pipes according to the conventional pipe processing method. Fig. 3a to Fig. 3c are drawings A flow chart of a pipe processing method according to an embodiment of the present invention is shown in a flow chart of a forward pipe drawing process. FIGS. 4a to 4c are diagrams showing a pipe processing method according to an embodiment of the present invention, in a reverse pipe drawing process. Flow 5a to 5c are schematic flow charts showing a pipe processing method according to an embodiment of the present invention in a forward pipe drawing process. FIGS. 6a to 6c are diagrams showing a pipe according to an embodiment of the present invention. FIG. 7a is a schematic view showing a cross section of a pipe according to an embodiment of the present invention, and a cross section of a pipe according to an embodiment of the present invention. FIG. 7b is a schematic view showing a cross section of a pipe according to an embodiment of the present invention. Pipe processing method, schematic diagram of pipe section. [Main component symbol description] 100: pipe 110: first end 120 · abutting portion 130: second end 140: die 141: slip surface 142: difference row 200: The punch 210: the eye mold 220: the eye mold hole 300: the pipe 310: the first end 3 11 : the first abutting portion 313 : the third abutting portion 320 : the second end 321 : the second abutting portion 3 3 0 . Die 331: first slip surface 332: second slip surface 333: difference row 400: eye mold 410: eye mold hole 500: eye mold 510: eye mold hole 600 eye mold 610 eye mold hole 700 punch 15