201201931 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種印刷電路板鑽孔機，其中在心軸 組中包括一可以在中心部任意回轉之心軸，並利用配置於 心軸組前端的壓腳（電路板壓腳），而在施壓於工件之加壓 狀態下，進行工件之加工。 【先前技術】 在印刷電路板上進行加工之場合，是先將複數片印刷 電路板予以積層後’再同時在複數片的印刷電路板上進行 加工’以便能提昇作業效率。還有，為了防止加工完後在 孔之入口部產生毛頭，通常是積層後在印刷電路板之最上 層配置上板。在以下是將組合後之印刷電路板和上板一起 稱為印刷電路板。多數時候印刷電路板之板厚並不完全一 致，故積層完後會在印刷電路板之上下方向產生間隙。在 此種場合時，可能會伴隨著鑽頭之鑽切而使得印刷電路板 朝上下方向移動，並因此造成鑽頭折斷之情況。故，事先 利用壓腳來施壓於印刷電路板上加工部之周邊，而在將印 刷電路板按壓於工作台上之狀態下，進行鑽頭的鑽切作業。 *此外’壓腳與心軸組間所形成之空間（以下稱為「屢腳 内二間」）疋連接至集塵機，將外氣經由設置於壓腳上用來 讓鑽頭貫穿之孔(以下稱為鑽頭用孔)中抽出，並將加工中 :產生之錯切粉從印刷電路板上予以回收。在印刷電路板 鑽孔機之場合，因為加玉時之稼動時間⑺⑴較短，故在 201201931 印刷電路板之加工期間，集塵機是經常在作動中。 在將鑽碩移動至下一處加工位置之時，如將印刷電路 曰與£腳間距離予以縮M，即縮短空切削時間的話，就能 提昇加工效率。但是在將壓腳靠近印刷電路板時，會因為201201931 VI. [Technical Field] The present invention relates to a printed circuit board drilling machine in which a mandrel group includes a mandrel that can be arbitrarily rotated at a center portion, and is configured in a mandrel group. The presser foot (circuit board presser foot) of the front end is used to process the workpiece under pressure applied to the workpiece. [Prior Art] When processing on a printed circuit board, a plurality of printed circuit boards are laminated, and then processed on a plurality of printed circuit boards at the same time to improve work efficiency. Further, in order to prevent the hair from being generated at the entrance of the hole after the processing, the upper plate is usually placed on the uppermost layer of the printed circuit board after lamination. In the following, the combined printed circuit board and upper board are collectively referred to as a printed circuit board. Most of the time, the board thickness of the printed circuit board is not exactly the same, so the gap will be generated in the lower direction of the printed circuit board after the lamination is completed. In such a case, the cutting of the drill bit may cause the printed circuit board to move up and down, and thus the drill bit may be broken. Therefore, the presser foot is used to press the periphery of the processed portion on the printed circuit board in advance, and the drill bit is drilled while the printed circuit board is pressed against the table. *In addition, the space formed between the presser foot and the mandrel group (hereinafter referred to as "two feet in the foot") is connected to the dust collector, and the outside air is passed through a hole provided on the presser foot for the drill bit to pass through (hereinafter referred to as The hole is drilled out of the drill bit and the miscut powder produced during processing is recovered from the printed circuit board. In the case of a printed circuit board drilling machine, since the moving time (7) (1) of the jade is short, the dust collector is often in operation during the processing of the printed circuit board of 201201931. When the drill is moved to the next machining position, if the distance between the printed circuit and the foot is reduced by M, that is, the empty cutting time is shortened, the machining efficiency can be improved. But when the presser foot is close to the printed circuit board, it will be because
集塵機之吸引力謓卜# & p I 運板彺上夺起，而將兼具有空氣流入口 功能之隸塞住，導致無法將鑽㈣全部排出。 因此-種利用加麼於工件之時，讓壓腳及心轴組能相 對私動的印刷電路板鑽孔機相關之提案被提出(專利文獻 1)。亦即’僅在進行工件加工之時，將用來讓壓腳内空： 能連通至外氣之通氣孔’配置在位於與心軸組對向之壓腳 :面’並在加工之時將壓腳内空間與外氣隔離，並在將鑽 、移動至下一處加工位置之時，讓壓腳内空間 外氣。 < 饮王 利用印刷電路板鑽孔機加工所得之孔徑，通常是 …·Η. 4龍’為了能輕易的進行心軸之高度方向定位，是將 H心軸前端至鑽頭前 突…一、 先)為止的距離(以下稱為鑽頭 斤 值〔例如25mm)，而與鑽頭之公稱外 徑無關。因此，採用專利文獻 馱1之技術，可以確實的將鑽 切粉排出，並防止在鑽頭移動 上板的浮起。 動至下一處加工位置之時產生 先前技術文獻 專利文獻1 .特開200 8— 80433號公報。 【發明内容】 4 201201931 發明所欲解決的課題： 在、、田孔彳空鑽切之場合’會有因高速回轉時的鑽頭前端 振動所坆成的加工精度不佳現象。在此場合，如將鑽頭突 出長度予以縮短（例如，i ，則可以提昇加工精度。以 下將利用盥值怂且& -、得、允長度同樣之鑽頭突出長度所進行之加工稱 * 」’及將利用長度縮短後之鑽頭突出長度來 進仃加工之場合稱為「高精度加工」。還有’相較於在通 韦力 時之〜轴組的組裝位置，在進行高精度加工之場 口疋相對於用來固持心軸組之夾頭而降低心轴組的組裝 位置，來縮短鑽頭突出長度。 第6圖所不係說明採用專利文獻1技術之場合所產生 的問題點，其中（a)為將通氣孔位置配置在適用通常加工的 位置而進订同精度加卫之場合，⑻為將通氣孔位置配置在 適用南精度加工的&置而進行通常加工之場合。 如同圖（a)中所示，在通常加工中將心軸組丄水平移動 至下-處加工位置之時’被定位成適用高精度加工之心軸 組1，會將設置於壓腳7 μ +、a β 。 坚腳7上之通軋孔8阻塞住，造成壓腳 内空間31之壓力盔法斗古 …决升间，而發生上板浮起現象。此外， 如同圖（b)中所示，在其掊痒 在同精度加工中當鑽頭6之前端接觸到 工件2 0之上端之砗，诎…a上m . <砰被疋位成適用通常加工之心軸組丨會 離開通氣孔8，故外n合Μ Λ、s * 既外孔會經由通矾孔8而流入壓腳内空間 31，造成壓腳内空間Ή夕厭七& .也攸 i力…法降下，而發生集塵能力 不足現象。 本發明之目的是為了解決 上述之課題，提供 一種印刷 201201931 加工都能 電路板鑽孔機，不論是進行通常加工或是高精度 減少空切削量，而提昇加工效率。 用以解決課題的手段： 為了解決上述之課題，本發明之印刷電路板鑽孔機中 包括：心軸組’被固持於夾頭上’用來固持工具並可以讓 工具任意的回轉’·以及壓腳’被支持於前述夾頭上並可以 沿著前述工具之軸線方向而任意的滑動，且是如同覆蓋住 前述：軸組前端般的嵌合於前述心軸組上。在前述壓腳之 側面設置通氣孔’ ϋ由前述壓腳與前述心軸組所形成之空 間:以連通至外氣’同時將前述空間連接至^源，再經 由前述麼腳施麼於工杜卜，廿々、2 > ㈣犯&孓工件上，並在則述通氣孔為閉塞之狀態 下，利用前述工具而在前述工件上進行加工，其特徵在於： 將前述工具固持在相對於前述夾頭而位於最靠近工件侧之 前述心軸組中，當該工具之前端接觸到前述工件的上面之 時，前述通氣孔是配置於讓前述空間與外氣相互連通之位 置同時並5又置板狀之遮閉器，在當前述壓腳之前端未與 前述工件接觸之時，該遮閉器之一端是被定位在，當前述 壓腳之前端未與前述工件接觸之時，從開口位於前述壓腳 外面之前述通氣孔的下端而朝向上方一定距離之位置，且 該距離是相等於當前述壓腳之前端未與前述工件接觸之時 從前述壓腳之前端至前述工具之前端為止的距離，且遮閉 之它端，是固持在前述夾頭上，又，當前述工具之前端 接觸到前述工件的上面之時’是利用前述遮閉器將前述空 間與外氣隔離。 201201931 發明效果： 不論是通常加工戋令 „ ^ 一尺疋呵精度加工之時，在加工期間都 此讓壓腳内空間保持負 、里狀態’亦能防止在心軸組上升或 水平移動之時工件的浮 ,^ ^ 起故可以提昇加工效率。此外， 由於裝置構造簡單， 亦可以降低操作成本。 【實施方式】 以下根據圖式來針對 +本發明之實施例加以說明。 第1圖係本發明相Μ _ „Α 關卩刷電路板鑽孔機之機頭部的正 面局部剖面圖，圖中 苗4 Α β不為心轴組被定位在高精度加工位 置之i琢合。第2圖為笛】囬丄 ’、 圖中之箭頭A方向視圖。 如第1圖所示，且古圓4^。 八有圓柱狀外形之心軸組1是固定於 夾頭2上。而夾頭9 ^ ^ Α 、 疋於鞍座3上。在夾頭2之下侧 兩端。卩配置一對的軸承4。 以沿著上下方向(2方向J座3疋由滑座5所支持並可 顯干 〇 )任忍的予以定位。滑座5是由未 顯不於圖中之機柱 向）而任魚的早、— 亚可以沿著圖之左右方向（Y方 w的予以疋位。經由 著圖之上下及左右太6 <構成’能將心軸組1沿 轴电i ” 而任意的予以定位。鑽頭6是由心 軸、、且1之剛端所支持並能 ]语人θ ^ 1士蒽回轉。圖中所示之心軸組 …疋在前端部形成45度之倒角。 杯狀的壓腳7是嵌合在心 1 音的#缸 釉組1之别端部上並可以任 為動。心轴Μ與壓腳7間 徑〇. 1mm左女 J乃冋間隙疋約為直 軸承二2:—對支撐桿15是固定在壓腳7之兩端，由 、者’並分別連結至撓性聯軸節16之-端。而 201201931 之一 撓性聯軸節16之它端則是分別連結至一對汽缸1 7 端。汽紅1 7之它端又被分別固定在支座18上。並再分別 將支座18固定於鞍座3上。又汽缸17是不斷的朝圖的下 方而施壓於壓腳7上。 在壓腳7之左側面上配置著通氣孔8。關於通氣孔8 之大小及向度方向之位置是如後所述。 如第2圖中所示，在壓腳7側面用來配置通氣孔8之 部为疋形成一平坦的面7 a。此外，亦在夾頭2之側面上形 成與面7a相同的面2a。 遮閉器50之材質是如不銹鋼等的金屬，並形成具有板 厚1的方形平板。在遮閉器50下端之51a側是密貼在面 7a上’並利用2支螺絲51而固定在面2a上。 在壓腳7之下部固定著樹脂或是金屬製的襯套9。在 襯套9之下端σρ上形成用來連接至外氣及鑽頭用孔之十 字狀的溝U。還有，由於實質上壓腳7與襯套9是作出一 體的構成’在以下是將襯套9之下端面以壓腳7之下端面 7b來稱呼。 設置於壓腳7之下端側 組1所包圍形成的壓腳内空 管33是連接在管接頭32上 顯示於圖中之集塵機。 的孔30，是將由壓腳7及心軸 間31與管接頭32予以連接。 ，又管33之另一端則連接至未 20被載置於工作台21上。工 紙面垂直的前後方向（X方向） 作為工件之印刷電路板 作台21是可以任意的沿著與 而定位。 8 201201931 經由以上的構成，當沿著心軸組1之軸線0方向而相 對於夹頭2來改變心軸組〗之固定位置時，就會改變堡腳 内空間31之軸線〇方向長度。 接下來針對通氣孔8之高度方向配置位置加以說明。 第3圖係顯示壓腳7之前端周邊的放大示意圖，其中 分別（a)所示為壓腳7之下端面几接觸到印刷電路板別之 上面之時，（b)所示為鑽頭6之前端接觸到印刷電路板2〇 之上面之時。還有’心軸組i是設定在高精度加工用之高 度。 此處，疋在壓腳7之下端面7b離開印刷電路板2〇之 場合，接觸到印刷電路板2〇之時，將心軸組i的前端U 與壓腳7之下端面7b間之距離設定為L，並將通常加工時 的距離L定為Ln，高精度加工時的距離L定為Lk，則Ln >Lk。但是，不論壓腳7是在距離^或是距離u之場合， 鑽碩6之前端都是被定位在下端面几之上方一定距離h之 处(通节X 2〜3mm，在此處是設定為2mm)。目此，在本實施 穷。虽壓腳7之下端面7b接觸到印刷電路板2〇之 上面之時’心軸組i的前端la與壓腳7之下端面几間之 距離為Lk，且鑽頭6之俞嫂+ 讚项〇之剛為疋位在離下端面7b距離 位置。 在圖示之場合，通氣孔8是作成直徑為m之圓形。此 在、氣孔8面向外氣側之上端8〇&，與面向壓腳内空 間：1側之上端8ia’具有相同的Z方向高度。而下端81卜 則是定位在當鑽頭6之前媲垃 ^接觸到印刷電路板20之上面之 201201931 時：可以讓壓腳内空間31與外氣連通的位置 圖中所+ # Α 1 在如 Τ虽心軸組1之前端形成倒角部之場合，θ 8 i b a? s -/- + 將下端 •置在較倒角部之上側1 j更為下側之位、 定β '从下之設 疋，m = 在本實施例中，雖然是將通氣孔8之形狀作 成圓形，亦可以是將通氣孔8作成小判狀之長圓孔 遮閉盗50之下端50a，是在壓腳7之下端面礼 是在接觸物刷電…的上面之時，位於由通：孔或8 之下端m算起距離為h之處，並將遮閉器5。固定在夾頭 2 t面。還有’遮閉器5。之寬度，是其各側都較通氣二 之度（口徑）m的兩端長出約2mm以上的長度，並具The attraction of the dust collector is 夺 & & & & & & & & & & & & & & & & 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺 夺Therefore, a proposal relating to a printed circuit board drilling machine in which a presser foot and a mandrel group can be relatively freely moved is proposed (Patent Document 1). That is, 'only when the workpiece is being processed, it will be used to make the presser foot empty: the vent hole that can communicate with the outside air' is placed on the presser foot opposite the mandrel group: face' and will be processed The space inside the presser foot is isolated from the outside air, and the space inside the presser foot is made to be outside when the drill is moved to the next processing position. < The king's aperture obtained by using the printed circuit board drilling machine is usually...·Η. 4 Dragon' In order to easily position the height of the mandrel, the front end of the H mandrel is forwarded to the drill bit. The distance to the first point (hereinafter referred to as the bit value (for example, 25 mm) is independent of the nominal outer diameter of the drill. Therefore, by the technique of Patent Document 驮 1, it is possible to surely discharge the drill powder and prevent the floating of the plate on the movement of the drill bit. The prior art is produced at the time of the next processing position. Patent Document 1. JP-A-200-8-350433. [Claim of the Invention] 4 201201931 Problem to be Solved by the Invention: In the case where the hole is drilled in the field, there is a problem that the machining accuracy due to the vibration of the tip of the drill at the time of high-speed rotation is poor. In this case, if the length of the drill protrusion is shortened (for example, i, the machining accuracy can be improved. In the following, the machining value of the length of the drill with the same length and the length of the drill can be used." And the case where the length of the drill with the length shortened is used for the machining process is called "high-precision machining". There is also a "high-precision machining" compared to the assembly position of the shaft group at the time of Tongweili. The mouthpiece reduces the assembly length of the spindle group with respect to the chuck for holding the spindle group, and shortens the length of the drill protrusion. Fig. 6 does not describe the problem occurring in the case of the technique of Patent Document 1, in which a) In the case where the position of the vent hole is placed at the position where the normal machining is applied, and the precision is applied, (8) is a case where the vent hole position is placed in the normal machining of the South precision machining and the normal machining is performed. As shown in a), when the spindle set is moved horizontally to the lower-machining position during normal machining, the spindle set 1 that is positioned for high-precision machining will be placed on the presser foot 7 μ +, a β. The through-hole 8 on the foot 7 is blocked, causing the pressure in the space 31 of the presser foot to rise, and the upper plate floats. Further, as shown in the figure (b), Itching in the same precision machining, when the front end of the drill bit 6 contacts the upper end of the workpiece 20, 诎...a is m. <砰 is clamped into a mandrel group suitable for normal processing, and will leave the vent hole 8, so n Μ Λ, s * The outer hole will flow into the inner space 31 of the presser foot through the boring hole 8, causing the space inside the presser foot to be smashed and the lower force is lowered. Phenomenon. The object of the present invention is to solve the above problems and to provide a circuit board drilling machine capable of printing 201201931, which can improve the machining efficiency by performing normal machining or reducing the amount of air cutting with high precision. Means: In order to solve the above problems, the printed circuit board drilling machine of the present invention comprises: a spindle set 'held on the chuck' for holding the tool and allowing the tool to rotate arbitrarily '· and the presser foot 'is supported The aforementioned chuck can be along the aforementioned work The sliding direction is arbitrarily slid in the axial direction, and is fitted to the mandrel group as in the front end of the shaft group. A vent hole is provided on the side of the presser foot, and the presser foot and the mandrel group are provided. The space formed: to connect to the outside air 'at the same time connect the space to the source, and then apply the above-mentioned foot to the work Dub, 廿々, 2 > (4) commit & 孓 workpiece, and then speak When the air hole is in an occluded state, the workpiece is processed on the workpiece by using the tool, and the tool is held in the mandrel group located closest to the workpiece side with respect to the chuck, when the tool is at the front end. When the upper surface of the workpiece is in contact with the workpiece, the vent hole is disposed at a position where the space and the outside air are in communication with each other, and is further provided with a plate shape, and the front end of the presser foot is not in contact with the workpiece. One end of the shutter is positioned such that when the front end of the presser foot is not in contact with the workpiece, a position at a distance upward from the lower end of the vent hole outside the presser foot is opened And the distance is equal to the distance from the front end of the presser foot to the front end of the tool when the front end of the presser foot is not in contact with the workpiece, and the end of the shutter is retained on the chuck, and When the front end of the aforementioned tool comes into contact with the upper surface of the aforementioned workpiece, the space is separated from the outside air by the aforementioned shutter. 201201931 Effect of the invention: Whether it is the usual processing „ ^ 一 疋 疋 precision processing, the internal space of the presser foot is kept negative during the machining process, and the workpiece can be prevented from rising or horizontally moving. In addition, since the device structure is simple, the operation cost can also be reduced. [Embodiment] Hereinafter, an embodiment of the present invention will be described based on the drawings. FIG. 1 is a view of the present invention. Phase _ „ Α Α 卩 卩 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路 电路Figure 2 is a view of the direction of the arrow A in the picture of the flute. As shown in Figure 1, and the ancient circle 4^. The mandrel set 1 having a cylindrical shape is fixed to the collet 2. The collet 9 ^ ^ Α is placed on the saddle 3. At the lower ends of the chuck 2 at both ends.卩 Configure a pair of bearings 4. It is positioned in the up and down direction (2 in the J direction, 3 is supported by the carriage 5 and can be dried). The slide 5 is not shown in the figure of the machine column, and the fish is early, and the sub-direction can be along the left and right direction of the figure (Y square w is clamped. Above and below the map is too 6 < The constituting 'can set the mandrel group 1 along the axis i" can be positioned arbitrarily. The drill bit 6 is supported by the mandrel and the rigid end of 1 and can be rotated by the speaker θ ^ 1 ± 蒽. The mandrel group shown in Fig. 疋 forms a chamfer of 45 degrees at the front end portion. The cup-shaped presser foot 7 is fitted to the other end of the # cylinder glaze group 1 of the heart 1 sound and can be moved. The distance between the presser foot 7 is 1. 1mm left female J is the gap 疋 about straight bearing 2 2: the support rod 15 is fixed at the two ends of the presser foot 7, and the 'connected to the flexible coupling respectively The end of one of the flexible couplings 16 of 201201931 is connected to the end of a pair of cylinders 17. The ends of the steam red 1 7 are respectively fixed on the support 18 and respectively The support 18 is fixed to the saddle 3. The cylinder 17 is continuously pressed against the presser foot 7 toward the lower side of the figure. The vent hole 8 is disposed on the left side of the presser foot 7. The size of the vent hole 8 is And toward the side The position is as described later. As shown in Fig. 2, the portion for arranging the vent hole 8 on the side of the presser foot 7 is formed into a flat surface 7a, and is also formed on the side of the chuck 2. The same surface 2a as the surface 7a. The material of the shutter 50 is a metal such as stainless steel, and a square flat plate having a thickness of 1 is formed. The 51a side of the lower end of the shutter 50 is adhered to the surface 7a' and utilized. Two screws 51 are fixed to the surface 2a. A resin or a metal bushing 9 is fixed to the lower portion of the presser foot 7. A cross for connecting the outer air and the drill hole is formed at the lower end σρ of the bushing 9. Further, since the presser foot 7 and the bushing 9 are substantially integrated, the lower end face of the bushing 9 is referred to as the lower end face 7b of the presser foot 7 as follows. The presser foot inner tube 33 formed by the lower end side group 1 is a dust collecting machine which is connected to the pipe joint 32 and shown in the drawing. The hole 30 is connected between the presser foot 7 and the mandrel 31 and the pipe joint 32. And the other end of the tube 33 is connected to the non-20 which is placed on the table 21. The vertical direction of the work paper surface (X direction) is The printed circuit board stage 21 of the workpiece can be positioned arbitrarily along the alignment. 8 201201931 With the above configuration, the fixing of the spindle group with respect to the chuck 2 along the axis 0 direction of the spindle group 1 is fixed. In the position, the length in the axial direction of the space 31 in the forefoot is changed. Next, the position of the vent hole 8 in the height direction will be described. Fig. 3 is an enlarged schematic view showing the periphery of the front end of the presser foot 7, respectively (a ) is shown when the lower end of the presser foot 7 touches the top of the printed circuit board, and (b) shows the front end of the drill bit 6 when it contacts the printed circuit board 2 。. i is set to the height for high-precision machining. Here, when the lower end surface 7b of the presser foot 7 leaves the printed circuit board 2b, the distance between the front end U of the mandrel group i and the lower end surface 7b of the presser foot 7 is contacted when the printed circuit board 2 is contacted. When L is set, the distance L at the time of normal machining is Ln, and the distance L at the time of high-precision machining is Lk, Ln > Lk. However, regardless of whether the presser foot 7 is at a distance ^ or a distance u, the front end of the drill 6 is positioned at a certain distance h above the lower end face (the pass X 2 to 3 mm, here is set to 2mm). For this reason, it is poor in this implementation. When the lower end surface 7b of the presser foot 7 contacts the upper surface of the printed circuit board 2', the distance between the front end la of the mandrel group i and the lower end surface of the presser foot 7 is Lk, and the bit 6 of the drill bit + praise The 〇 is just the position of the 疋 position at the distance from the lower end face 7b. In the case of the illustration, the vent hole 8 is formed in a circular shape having a diameter of m. The upper end 8 〇& of the air hole 8 facing the outer air side has the same Z-direction height as the inner side of the presser foot: the upper end 8ia' of the 1 side. The lower end 81 is positioned at 201201931 when the drill bit 6 is in contact with the upper surface of the printed circuit board 20: the position in the position where the inner space 31 of the presser foot is in communication with the outside air is + # Α 1 When the front end of the mandrel group 1 forms a chamfered portion, θ 8 iba s -/- + sets the lower end to the lower side of the chamfered portion 1 j to the lower side, and the fixed β ' from the bottom疋, m = In the present embodiment, although the shape of the vent hole 8 is made circular, the vent hole 8 may be formed into a small-shaped oblong hole to cover the lower end 50a of the thief 50, which is under the presser foot 7. The end face is located on the top of the contact brush, and is located at the distance h from the lower end of the hole or hole 8 and the shutter 5 is placed. Fixed to the 2 t side of the chuck. There is also a 'hedge 5. The width of each side is longer than the length of the second degree of ventilation (caliber) m by about 2 mm or more.
卜2職之板厚t。還有，在同圖（a)中所示之距離 壓腳 I ^離開印刷電路板20之上面時（或者是在 之下端面7b接觸到印刷電路板20的上面之時），由 壓腳7之下端面7b至遮閉器5〇之下端50a為止的距離。 接下來針對本發明之動作加以說明。 在心軸組1沿著水平方向移動之場合，壓腳7之下端 二是離開印刷電路板2。’而通氣孔8中從下端面8ob J與遮閉器5〇之下姐4 下禚50a相對向之位置為止，是與外氣相 …此夕卜由於鑽碩用孔10亦是開放狀態，故外氣就通 氣孔8及鑽頭用孔10而流入壓腳内空間31内。其結 果，鑽頭用孔1 〇周邊 邊之壓力疋與大氣壓力接近，就不會發 生印刷電路板20之浮起現象。 "* 7b接觸到印刷電路板2 0至鑽頭Θ之前端接 觸到印刷電路板2〇 A I· « 為止期間’遮閉器5 0及鑽頭6 (亦即心 10 201201931 軸組υ是整體同時下降。故，在下端φ 7b接觸到印刷電 路板20至鑽頭6之前戚姑細2；丨/ &接觸到印刷電路板20為止期間， 會因為遮閉器5°的下降而使得通氣孔8之實質截面積逐漸 的減小，當鑽頭6之前端接觸到印刷電路板20時，就會如 第3圖⑻所不’經由遮閉器5〇而將通氣孔8與外氣隔離， 讓通氣孔8之實質截面積成為Q。因此 壓腳内空間31是保持著負壓狀態。 T加… 加工結束，鑽頭6之前端從印刷電路板2G離開後，由 於遮閉器5 0會相對於通氣孔8 瑕*孔8上昇’而使得通氣孔8之實 質截面積逐漸的增加，當塵腳7之下端面7b從印刷電路板 2〇之上面離開之時，壓腳心間31之麼力值就接近大氣 =因此，印刷電路板20就不會往上浮起。經過確認，當 ，氣孔8之直徑大於3mm時就能達到此種效果。 雖然通常加工時的距離Ln較高精度加工時的距離U 為大’由於在通常加工之場合夾頭2之位置並無改變，僅 ^組^之位置有所改變’故在動作上是與上述之高精度 加工的場合相同。 還有’遮閉器50之材質亦可以是採用具有較大岡 合成樹脂。 此外’就以上述之例子而言，基於以下的理由是以m 2 h為佳。 y 如按照上述將h设定為約2mm以下時，因為h變小 :炎加工上亦變的較為困難，故h較大時通氣孔8會The board of the 2nd job is thick t. Further, when the distance leg I ^ shown in the same figure (a) is away from the upper surface of the printed circuit board 20 (or when the lower end surface 7b contacts the upper surface of the printed circuit board 20), the presser foot 7 The distance from the lower end face 7b to the lower end 50a of the shutter 5〇. Next, the operation of the present invention will be described. In the case where the mandrel group 1 is moved in the horizontal direction, the lower end 2 of the presser foot 7 is away from the printed circuit board 2. 'The vent hole 8 is from the lower end surface 8ob J and the position of the lower side of the shutter 5 〇 under the shutter 5 , 50a, and is the outer gas phase... This is because the drill hole 10 is also open. Therefore, the outside air flows into the inside space 31 of the presser foot in the vent hole 8 and the drill hole 10. As a result, the pressure 〇 around the hole 1 of the drill bit is close to the atmospheric pressure, and the floating phenomenon of the printed circuit board 20 does not occur. "* 7b touches the printed circuit board 2 0 to the front end of the drill bit 接触 contacts the printed circuit board 2〇AI· « During the period of time, the shutter 50 and the drill bit 6 (ie the heart 10 201201931 axis group υ is the same as the whole Therefore, before the lower end φ 7b contacts the printed circuit board 20 to the drill bit 2; during the contact with the printed circuit board 20, the vent hole 8 is caused by the drop of the shutter 5°. The substantial cross-sectional area is gradually reduced. When the front end of the drill bit 6 contacts the printed circuit board 20, the vent hole 8 is isolated from the outside air via the shutter 5〇 as shown in FIG. 3(8), and the vent hole is provided. The substantial cross-sectional area of 8 becomes Q. Therefore, the space 31 in the presser foot is maintained in a negative pressure state. T is added. After the machining is finished, the front end of the drill bit 6 is separated from the printed circuit board 2G, since the shutter 50 is opposed to the vent hole. 8 瑕 * hole 8 rises 'and the substantial cross-sectional area of the vent hole 8 gradually increases, when the lower end face 7b of the dust foot 7 is separated from the top of the printed circuit board 2, the force value of the presser foot center 31 is close Atmosphere = Therefore, the printed circuit board 20 will not float up. After confirmation, when This effect can be achieved when the diameter of the pores 8 is larger than 3 mm. Although the distance Ln during processing is usually high, the distance U during processing is large. 'Because the position of the chuck 2 does not change in the case of normal processing, only ^ The position of the group ^ has changed', so the operation is the same as the above-mentioned high-precision machining. Also, the material of the shutter 50 may be made of a larger synthetic resin. In addition, the above example In other words, it is preferable to use m 2 h for the following reasons: y If h is set to be about 2 mm or less as described above, since h becomes small: it is difficult to change the inflammatory process, so the vent hole 8 is large when h is large. meeting
加工。 W 11 201201931 2.為了提昇遮閉器50之氣密性能’而在通氣孔8之入 口裝上例如是密封墊等之場合，則可能會在壓腳7之表面 上造成段差，當m k h之時，因為從一開始就可以將遮閉器 50覆蓋在密封塾上，在動作當中遮閉器50不會與密封墊 等之端緣發生干涉，而能夠讓遮閉器50滑順的動作。 因此’在不發生如上所述之問題，並能確保有充足截 面積之場合，亦可以是作成m < h。 第4圖係顯示本發明之衍生例示意圖。如上所述，由 於即使將本發明相關之通氣孔8作成相對較小的口徑（m: 亦同樣具有效果，故如通氣孔8之口徑在5mm以下之時就 算不設置上述之平坦面，亦不易發生遮閉器50與密封墊等 之端緣干涉的問題。因此，就可以如本圖中所示的，直接 在壓腳7之圓筒狀側壁上穿孔作出通氣孔8。在此場合， 可以设置複數個小σ徑的通氣孔8，同時亦可以設置一體 成幵y的個或是分別設置個別的遮閉器5 0。 第5圖係顯示本發明之其它衍生例示意圖。在加工深 度K之孔的場合，是如第4圖所示鐵頭6是下降κ。由於 此時遮閉器50之下*山+ 、 下^…亦同時是下降Κ，故必須事先確 '、（-h) “。亦即如同圖中所示的，如 線作成左側較高之w 项軋孔8之軸 位置相… 讓通氣孔8之下端8ob的 才較於下端8ib的位置為高，而能夠 h)gK。 旳月匕夠輕易的實現（Η — 【圖式簡單說明】 12 201201931 第1圖係本發明 面局部剖面圖。 相關印刷電路板鑽孔機之 機碩部的正 第2圖係第1圖中 第3圖（a) 、 （b)顯 示意圖。 之箭頭A方向視圖。 示第1圖中壓腳7前端 周邊之放大 第4圖係顯示本發明之衍生例示意圖。 意圖。 第5圖係顯示本發明之其它衍生例示意圖 第6圖（a) ' (b)係說明習知技術及課題之 【主要元件符號說明】 心軸組； 2〜爽頭； 6〜工具（鑽頭）； 7〜壓腳； 8 ~通氣孔； 2 0〜工件； 3壓腳内空間； 5 0〜遮閉器。 13machining. W 11 201201931 2. In order to improve the airtight performance of the shutter 50, when a gasket or the like is attached to the inlet of the vent hole 8, a step may be caused on the surface of the presser foot 7, when mkh Since the shutter 50 can be covered on the sealing jaw from the beginning, the shutter 50 can be prevented from interfering with the edge of the gasket or the like during the operation, and the shutter 50 can be smoothly slid. Therefore, in the case where the above problem does not occur and it is ensured that there is a sufficient cross-sectional area, it is also possible to create m < h. Figure 4 is a schematic view showing a derivative of the present invention. As described above, even if the vent hole 8 according to the present invention is made to have a relatively small diameter (m: the same effect is obtained, if the vent hole 8 has a diameter of 5 mm or less, even if the flat surface is not provided, it is not easy. The problem that the shutter 50 interferes with the edge of the gasket or the like occurs. Therefore, as shown in the figure, the vent hole 8 can be made by directly perforating the cylindrical side wall of the presser foot 7. In this case, A plurality of vent holes 8 having a small sigma diameter are provided, and at the same time, an integral 幵y may be provided or an individual shutter 50 may be separately provided. Fig. 5 is a schematic view showing another derivative of the present invention. In the case of the hole, the iron head 6 is lowered by κ as shown in Fig. 4. Since the lower side of the shutter 50 is also lower than the mountain, it is necessary to confirm ', (-h) ". That is, as shown in the figure, if the line is made to the left side of the upper side of the upper w-rolling hole 8, the position of the lower end 8ob of the vent hole 8 is higher than that of the lower end 8ib, and can be h )gK. 旳月匕 is easy to implement (Η - [Simple description] 12 201201931 1 is a partial cross-sectional view of the present invention. Fig. 2 is a front view of a machine-part of a related printed circuit board drilling machine, and Fig. 3 (a) and (b) are views showing an arrow A direction. FIG. 1 is a schematic view showing a derivative of the present invention. FIG. 5 is a schematic view showing another derivative of the present invention. FIG. 6(a) '(b) is a description [Technical and subject matter] [Main component symbol description] Mandrel group; 2~ cool head; 6~tool (drill); 7~ presser foot; 8 ~ vent hole; 2 0~ workpiece; 3 presser foot space; 0~ shutter. 13