1311079 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種金屬殼體之製造方法。 【先前技術】 ^隨著人們生活水準之提高，行動電話、PDA (個人數 字助理，Personal digital assistant )、MP3及掌上電腦等栌 帶式電子裝置大量進入人們之生活和工作，給人們帶來^ 便和樂趣。現今，人們對於上述各種電子裝置不但要求功 月b強大，而且希望其外觀美觀、表面質感良好，故對可檇 式電子裂置之殼體材質、表面加工精度及粗糙度要求較高。 習知之攜帶式電子裝置之殼體之材質主要有塑 金屬兩種，且較多攜帶式電子裝置之殼體中央與周圍1厚 度不等，若為塑膠殼體則可藉由注塑成型，故成型不: 塑膠殼體相對較易，然，若為金屬殼體，則很難藉由注塑 成型之方法製造，現今業界在製造不等厚金屬殼體時，一 ，採用多次銳銷之方法將毛❹工成需要之形狀和㈣ 又，即先對毛坯進行粗銑，使其形狀和尺寸與電子 =致相同’然後進行精銑，從而滿足表面加工精^和粗 板度之要求。採用上述多次銑銷之方法時，其加卫時間長， 例如加工—普通之手機殼體時—般長達十多個小時，因此 效ί較低，且銑銷之加工成本較高，因此提高了電 成本。在多次銑銷之過程中，有大量之材料 銑去而成為廢料浪費掉，這亦從另一方面摇古τ 製造成本。另外，習去社个士菩士 ^ 乃萌故问了 另卜&知技術中還有一種成型不等厚金屬私 6 1311079 體之製造方法，j>- v 狀，再蕤山#& 法先將金屬板材衝壓成殼體毛坯形 然而該i方、二加工，將殼體毛述加工成不等厚金屬殼體， 體積I大“乃然需要較長之銑鎖加工時間，且衝壓設備 異形邱，：：較ΐ，另外若殼體上設有具有不規則形狀之 至二、、、法猎由衝壓成型’異形部需要單獨加工後， 藉由焊接之方法與殼體相結合’這樣生產效率較低。此 f ’上述兩種製造不等厚金屬之方法製造出之不等厚金屬 殼體，由於在加工過程中殼體材料未經過強化，故強度相 對較弱，不利於提高金屬殼體使用壽命，如要使金屬殼體 具有較好之強度則要選擇強度較高之材質或者加厚殼體厚 度，如此又會增加成本，且加厚殼體厚度勢必會增大金屬 设體之之體積，不利於殼體之小型化。 【發明内容】 鑒於以上内容，有必要提供一種可提高殼體強度、降 低製造成本之金屬殼體之製造方法。 一種金屬殼體之製造方法，包括以下步驟：下料，提 供毛坯；碾壓，用碾壓模具對毛坯進行碾壓，從而得到預 型體；及銑銷，對預型體進行精密銑銷，從而得到厚度不 等之金屬殼體。 相較習知技術，所述金屬殼體之製造方法製成之♦ 體，其具有良好之機械性能’即具有較高之硬度及較好之 耐磨性，另外經過碾壓後之殼體還具有較好之表面質感。 碾壓過程中無廢料產生，節約了成本。殼體之整個成型時 1311079 間大大縮短，提高了生產效率 【實施方式】 該方ίΓΓΓ圭實施例公開—種金屬殼體之製造方法及 :二之"又體’其適用於行動電話、PDA、MP3及掌 1二等電子裝置之殼體’且所需成型之金屬殼體 與四周厚度不等，以下占剂士 4 间 成方法以金屬殼體四周厚度大於 中間尽度為例進行說明。 本較佳實施例所述之金屬殼體之製造方法包括以 驟· 乂 下料。凊參閱圖1，在一板材上根據殼體之形狀和大 二：割出-板狀毛述20。在本實施例_，該毛述2〇之材 呂合金。可以理解，該毛述2Q之材料亦可為其他金屬 材料，例如鎮合金。 、碟壓成型。請參閱圖2至圖4,用碾壓模具3G對毛趣 2〇進行礙壓成型，從而得到預型體4()。該碾壓模呈 設於碼壓設備（圖未示）上，其包括—上模3〇1及—下模、 3〇2’該下模3G2固定於礙壓設備上，而上模3()1則在礙壓 設備之帶動下可左右擺動—定角度，#上模3〇1擺動到最 大角度時，其軸心線與下模302之軸心線之夾角為$，該 夾角/5可根據產品結構進行設計。上模3〇1朝向下模 之一端設置有成型面則，該成型面則根據所需成型 之殼體設計而成，在本實施中，該成型面3〇11為球面或者 錐面，即上模301設置有成型面3〇11之一端中間厚度大於 8 1311079 四周厚度。該下模302上端設置有一安裝面3〇21，用於安 裝毛链2 0。 當碾壓成型時，將毛坯20固定於安裝面3021上，上 模301在碾壓設備之帶動下緊壓毛坯2〇，且相對下模 左右擺動，由於上模301設置有成型面3〇11之一端中間厚 度大於四周厚度，故毛坯2〇材料將會被向四周擠壓，使中 間厚度變薄四周厚度增厚，且在擠壓過程中毛坯2〇之材料 被強化，如此可使成型後之殼體強度較高，經過上模3〇1 之成型面3011之碾壓後，毛坯2〇被逐漸碾壓出與所需加 工之殼體形狀接近之預型體4〇。 可以理解’下模3〇2中央還可開設一頂出孔搬2，該 頂出孔3022内容納有一頂出裝置303，該頂出裝置3〇3用 於成型後之將工件頂出。該頂出孔3〇22還可用於毛述 之定位’故在關成型之前，可在該毛链2()_側中央成型 出-定位部2(Π ’該定位部2〇1可與頂出孔聰配合，以 便在碾壓成型時將毛述2〇定位，該定位物亦可 定位部2〇1可為方形或者其他非圓形，該頂出 孔 與疋位部201截面形狀一致，以便使毛链20在礙 壓過程中能相對下模搬时。在本實施例中，該頂出裝 置3〇3為方形頂杆’其截面形狀與定位部201截面形狀— 致。可以理解，該頂出孔3〇22亦可包括上下开 部分’即與定位部201配合之部分為方形或者其他非/ ^置而與=裝置3Q配合之部分為圓形，相應地 裝置30為圓柱體。 1311079 從而所？參：圖5,對預型體4°表面進行精密銳鎖， 之二大喊體6〇。由於經過碾壓形成之預型體40 大，與所需之殼體大體相同，故可大大縮短銑鎖 工开:狀精戶3’間’另，错由銑銷之精加工後’殼體60之加 工升y狀精度、尺寸精度均較高。 中：：：用上述方法成型之殼體6〇而言，在礙壓過程 部之金她織被細化，因此經過碾壓後，殼 且%1Λ 得以提高，包括硬度增大，耐磨性提高， 丨且表面質感增強。 在用上述金屬殼體之製造方法制得之殼體6〇之過程 二由於粗加工階段是採用碾壓之方法’材料被碾壓成型， 2材料從毛链2〇上脫離，因此不會產生廢料。在精加工 二又’儘官㈣之加:η方法仍為銑銷’故將有材料從預型 立士40上脫離’然’由於預型體4〇之形狀或尺寸已與所需 2體60大體相同，因此僅有少量材料脫離預型體扣而 成，廢料’故可大大減少銑削加工時間。因此採用上述金 屬殼體之製造方法製造殼體6G時，材料之浪費报少。礙麗 成型所需之時間較短，大大提高了生產效率。由於礙壓成 型過程中衝擊很少，故碾壓模具3〇使用較長，且碾壓設備 之°頓位與體積相對於衝壓設備可大大減小。 °月參閱圖6，本發明另一實施例中之殼體7〇上具有不 規則形狀之異形部701，則該異形部7〇1亦可藉由碾壓成 形，即先在成型殼體70成形之前，先藉由一碾壓模具將異 形部701碾壓成型，如此異形部701無需單獨加工，大^ 10 1311079 提向了生產效率。 綜上所述’本發明符合發明專利要件，差依法 利申請。#，以上料者僅為本發明之較佳實施方式 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技蔽 之人士，於援依本案發明精神所作之等效修飾或變化，= 應包含於以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明金屬殼體之製造方法中之殼體毛坯。 圖2係本發明金屬殼體之製造方法中之第一狀態圖。 圖3係本發明金屬殼體之製造方法中之第二狀態圖。 圖4係本發明金屬殼體之製造方法中碾壓後之預型 體。 圖5係本發明金屬殼體之製造方法中銳銷後之—實施 例殼體。 圖6係本發明另—實施例中金屬殼體之製造方法所製 造之殼體。 【主要元件符號說明】 毛坯 20 定位部 201 碾壓模具 30 40 上模 301 下模 302 成型面 3011 安装面 3021 頂出子L 3022 谓出裝置 303 殻體 60 彀艨 70 異形部 7011311079 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a method of manufacturing a metal casing. [Prior Art] ^ With the improvement of people's living standards, mobile phones, PDA (Personal Digital Assistant), MP3 and Pocket PCs have entered the life and work of people in large numbers, bringing people ^ And fun. Nowadays, people are not only required to have a strong function of the above-mentioned various electronic devices, but also have a good appearance and a good surface texture. Therefore, the requirements for the material, surface processing precision and roughness of the squeezable electronic cracking are high. The material of the housing of the portable electronic device mainly has two kinds of plastic metal, and the thickness of the center of the shell of the portable electronic device is different from that of the surrounding one. If it is a plastic case, it can be molded by injection molding. No: The plastic case is relatively easy. However, if it is a metal case, it is difficult to manufacture by injection molding. Nowadays, when manufacturing unequal thickness metal casings, one adopts multiple sharp-reduction methods. The shape of the bristles is required and (4) The roughing of the blanks is first performed so that the shape and size are the same as those of the electrons, and then the milling is performed to meet the requirements of surface finishing and coarseness. When the above method of multiple milling is adopted, the curing time is long, for example, when processing - the ordinary mobile phone case - as long as more than ten hours, so the effect is low, and the processing cost of the milling pin is high. Therefore, the cost of electricity is increased. In the process of multiple milling, a large amount of material is milled and waste is wasted, which also causes the manufacturing cost of the ancient τ. In addition, Xi to the community, Shishi Boss ^ Nai Meng, asked another, and there is also a manufacturing method for forming a unequal thickness metal private 6 1311079 body, j>- v shape, then 蕤山#& First, the metal sheet is stamped into a shell blank shape. However, the i-square and the second processing process the shell shell into a unequal-thick metal shell, and the volume I is large, which requires a long milling processing time and a punching device. Shaped Qiu, :: It is more ambiguous, and if the shell is provided with an irregular shape to the second, the hunter is stamped and formed. The shaped part needs to be separately processed and combined with the shell by welding. The production efficiency is low. The above two methods for manufacturing unequal thickness metals produce unequal thickness metal shells. Since the shell material is not strengthened during processing, the strength is relatively weak, which is not conducive to improving the metal. The service life of the shell, if the metal shell has better strength, the material with higher strength or the thickness of the thicker shell should be selected, which will increase the cost, and the thickness of the thickened shell will inevitably increase the metal body. The volume is not conducive to the shell SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a method for manufacturing a metal casing which can improve the strength of the casing and reduce the manufacturing cost. A method for manufacturing a metal casing includes the following steps: blanking, providing a blank Rolling, rolling the blank with a rolling die to obtain a preform; and milling the pin, precision milling the preform to obtain a metal casing of varying thickness. Compared with conventional techniques, The body made of the metal shell has good mechanical properties, that is, it has high hardness and good wear resistance, and the shell after rolling has a good surface texture. No waste is generated during the rolling process, which saves cost. The entire molding process of the housing is greatly shortened between 1311079 and the production efficiency is improved. [Embodiment] This embodiment discloses a method for manufacturing a metal casing and a second method. "also: 'applicable to the mobile phone, PDA, MP3 and palm 1 second electronic device shell' and the required metal shell and the thickness of the surrounding range, the following accountants 4 The method is described by taking the thickness of the metal casing as the thickness of the metal casing as an example. The manufacturing method of the metal casing described in the preferred embodiment includes the method of cutting the crucible. Referring to FIG. The shape of the body and the sophomore: cut-out of the plate-like hairs 20. In the present embodiment, the material of the hair is 2, and it can be understood that the material of the hair 2Q can also be other metal materials, such as the town. Alloy, disc press forming. Please refer to Fig. 2 to Fig. 4, the crushing mold 3G is used to form a preform 4 (). The rolling mold is set in a code pressing device ( (not shown), which includes - upper mold 3〇1 and - lower mold, 3〇2', the lower mold 3G2 is fixed on the pressure-blocking device, and the upper mold 3()1 is driven by the pressure-blocking device. Swinging left and right - fixed angle, when the upper die 3〇1 is swung to the maximum angle, the angle between the axis line and the axis line of the lower die 302 is $, and the angle /5 can be designed according to the product structure. The upper mold 3〇1 is provided with a molding surface toward one end of the lower mold, and the molding surface is designed according to the shell to be formed. In the present embodiment, the molding surface 3〇11 is a spherical surface or a tapered surface, that is, The mold 301 is provided with a thickness of one end of the molding surface 3〇11 which is greater than 8 1311079. The lower end of the lower mold 302 is provided with a mounting surface 3〇21 for mounting the chain 20. When the roll forming is performed, the blank 20 is fixed on the mounting surface 3021, and the upper mold 301 is pressed against the blank 2 2 by the rolling device, and is swung left and right with respect to the lower mold. Since the upper mold 301 is provided with the molding surface 3〇11 The thickness of one end is greater than the thickness of the four sides, so the material of the blank 2 will be extruded to the periphery, the thickness of the middle is thinned, the thickness of the blank is thickened, and the material of the blank 2 is strengthened during the extrusion process. The shell has a high strength, and after being crushed by the forming surface 3011 of the upper mold 3〇1, the blank 2 is gradually rolled out of the preform 4 which is close to the shape of the shell to be processed. It can be understood that the center of the lower mold 3〇2 can also be provided with a top outlet 2, and the ejector hole 3022 houses an ejection device 303 for ejecting the workpiece after molding. The ejector hole 3〇22 can also be used for the positioning of the hairs. Therefore, before the molding is completed, the positioning portion 2 can be formed in the center of the hair chain 2 () side (Π 'the positioning portion 2〇1 can be topped The hole is clamped to position the hair to be positioned during the rolling forming, and the positioning portion 2 can also be square or other non-circular shape, and the ejection hole and the clamping portion 201 have the same cross-sectional shape. In order to enable the hair chain 20 to be moved relative to the lower mold during the pressure-sucking process, in the present embodiment, the ejector device 3〇3 is a square apex 'the cross-sectional shape thereof and the cross-sectional shape of the positioning portion 201. It is understood that The ejector hole 3〇22 may also include an upper and lower opening portion, that is, a portion that is fitted with the positioning portion 201 is square or otherwise non-shaped, and a portion that is engaged with the device 3Q is circular, and the device 30 is a cylindrical body. 1311079 Thus, the reference: Figure 5, the precision of the 4° surface of the preform is precisely sharpened, and the second body is 6 〇. Since the pre-form 40 formed by rolling is large, it is substantially the same as the required housing. Therefore, the milling and opening work can be greatly shortened: the shape of the fine household 3' between the other, the wrong after the finishing of the milling and the 'housing 60 processing sheng y shape Accuracy and dimensional accuracy are high. Medium::: In the case of the casing 6成型 formed by the above method, the gold weave in the process of the pressure-inducing process is refined, so that after the rolling, the shell and the %1Λ are improved. Including hardness increase, wear resistance is improved, and the surface texture is enhanced. In the process of manufacturing the casing 6 by the above-mentioned metal shell manufacturing method, since the roughing stage is a method of rolling, the material is crushed. Molding, 2 materials are detached from the chain 2, so no waste is generated. In the finishing process 2, the addition of the official (four): η method is still milling] 'There will be material from the pre-type Lishi 40 off' However, since the shape or size of the preform 4 is substantially the same as that of the desired body 60, only a small amount of material is separated from the preform, and the waste material can greatly reduce the milling time. Therefore, the above metal shell is used. When manufacturing the casing 6G, the waste of materials is reduced. The time required for the forming of the barrier is shorter, which greatly improves the production efficiency. Since the impact during the pressure forming process is small, the rolling mold 3 is used. Long, and the pressure of the equipment The volume can be greatly reduced with respect to the punching device. Referring to Fig. 6, in another embodiment of the present invention, the housing 7 has an irregular shaped portion 701 on the outer casing, and the deformed portion 7〇1 can also be milled. Press forming, that is, the profiled portion 701 is first rolled and formed by a rolling die before the forming of the molded casing 70, so that the shaped portion 701 does not need to be separately processed, and the large-size 10 1311079 is directed to the production efficiency. The invention is in accordance with the requirements of the invention patent, and the application is based on the law. The above is only the preferred embodiment of the invention. The scope of the invention is not limited to the above embodiments, and those who are familiar with the technology of the case, Yu Yiyi Equivalent modifications or variations of the inventive concept are to be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a casing blank in a method of manufacturing a metal casing of the present invention. Figure 2 is a first state diagram of a method of manufacturing a metal casing of the present invention. Figure 3 is a second state view of the method of manufacturing the metal casing of the present invention. Fig. 4 is a pre-formed body after rolling in the method for producing a metal casing of the present invention. Fig. 5 is a view showing the embodiment of the metal casing of the present invention after the sharpening. Fig. 6 is a view showing a casing manufactured by a method of manufacturing a metal casing in another embodiment of the invention. [Main component symbol description] Blank 20 Positioning part 201 Rolling die 30 40 Upper die 301 Lower die 302 Forming surface 3011 Mounting surface 3021 Top ejector L 3022 Pre-existing device 303 Housing 60 彀艨 70 Shaped part 701