外文翻譯--孔加工技術發(fā)展動向

1、<p><b>　　附 錄</b></p><p>　　Hole processing technological development trend</p><p>　　In the machine parts processing work, the hole processing accounts for the proportion quite

2、 in a big way, with high speed vi state similar is high speed, the high accuracy drills truncates the processing to propose the agenda, the high efficiency hole processing regarding urges the spare part rationalization o

3、f production is the indispensable important technological process. In recent years, the spare part production mostly used take the CNC engine bed as the central production shape, when carri</p><p>　　The high

4、 speed hole processing uses the processing center (MC) condition</p><p>　　The realization hole processing high speed precondition is must use the high speed processing center, but the engine bed is high spee

5、d must satisfy the following condition.</p><p>　　1. Provides high speed rotates the main axle</p><p>　　The drill bit and the end mill equally have the central tooth, because nearby the central t

6、ooth has one kind of circumferential velociy, therefore, cutting speed to high speed development time, the main axle rotational speed also must realize high speed. Specially when use minor diameter drill bit, the main ax

7、le is high speed is essential. From now on, along with the hole processing high speed progress, estimated the rotational speed will reach 30,000 ~ 100000r/min the main axle demand unceasing</p><p>　　2. May m

8、ove partially has Moved quickly the function</p><p>　　The main axle and the work table and so on may move partially should reduce the weight as far as possible, realizes the movement quickly to melt, this al

9、so carries on the condition which the high speed hole processing must have. 1 hole process period only needs several seconds, therefore, must reduce between hole and hole the tool time of travel, this realizes the high e

10、fficiency cutting key question, solves this question way first namely for to be possible to move the part the movement to have </p><p>　　3.The work table and the engine bed overall area proportion should be

11、smaller</p><p>　　Move quickly as the processing center users, they hope workstations and workstations outside of the space occupied by some as possible. Particularly Kong processing these costs are higher an

12、d lower value-added processing area, the best use of that structure tight processing center. If Japan's high-speed physical-chemical testing of CNC milling machine Institute, the scope for 300mm2 processing, machine

13、tools identity covering 950mm2, machine tools covering about three times the size of her bigge</p><p>　　4. The main axle may directly supply the refrigerant</p><p>　　In drills truncates in the p

14、rocess, processes L/D (bits Kong diameter and deep over) to have specially to pay attention to the row of filings question in 5 above hole, best selects the belt for the oil hole drill bit, in order to carries on the sta

15、ble processing. Uses by the main axle center supplies refrigerant way, regarding replaces the clamping apparatus the locking bolt then is more convenient.</p><p>　　5. Has the hole processing to insert with t

16、he CNC tool makes up the function</p><p>　　The CNC cutting characteristic lies in may carry on the inspection tool path the reasonable processing, when carries on the CNC machining to the hole, may use the s

17、piral cutting, high walk knives,to cuts and so on the tool inserts makes up the way, has these functions the CNC control system to be possible to perform in the hole processing to apply.</p><p><b>　　孔加

18、工技術發(fā)展動向</b></p><p>　　在機械零件加工作業(yè)中，孔加工所占比例相當大，與高速銑削相類似的高速、高精度鉆削加工已提上議事日程，高效率孔加工對于促使零部件生產(chǎn)合理化是不可或缺的重要工藝過程。近年來，零部件生產(chǎn)大都采用以CNC機床為中心的生產(chǎn)形態(tài)，進行孔加工時，也大都采用加工中心、CNC電加工機床等先進設備。無論哪個領域的孔加工，實現(xiàn)高精度和高速化都是取得用戶訂單的重要競爭手段。</

19、p><p>　　高速孔加工所用加工中心(MC)的條件</p><p>　　實現(xiàn)孔加工高速化的先決條件是必須采用高速加工中心，而機床的高速化必須滿足下列條件。</p><p>　　1. 配備高速回轉主軸 </p><p>　　鉆頭和立銑刀一樣帶有中心齒，由于中心齒附近有一種圓周速度，因此，切削速度向高速化發(fā)展時，主軸的轉速也必須實現(xiàn)高速化。特別是在

20、使用小直徑鉆頭時，主軸的高速化更是不可缺少的。今后，隨著孔加工高速化的進展，預計轉速達30000～100000r/min的主軸需求將不斷增多。同時，由于達到規(guī)定的高速回轉所需時間很短以及要求Z向(鉆頭切削方向)主軸伸出長度應控制在最小程度之內，因此，高速主軸的配置是實現(xiàn)高速高精度孔加工不可缺少的條件。 2. 可動部分具有動作敏捷的功能 主軸和工作臺等可動部分應盡可能減輕重量，以實現(xiàn)動作快捷化，這也是進行高速孔加工必須

21、具備的條件。1個孔的加工時間只需數(shù)秒鐘，因此，必須縮短孔與孔之間的工具移動時間，這是實現(xiàn)高效率切削的關鍵問題，解決此問題的途徑首先即為可動部件的動作必須靈活快捷。例如，即便達到了高精度的定位精度，但如機床可動部分的動作不夠靈敏快捷，也就不可能滿足當前用戶提出的實現(xiàn)高速孔加工的要求。通常是用加速度特性(G值)來判斷機床可動部分的快捷性能，當G=0.8～1.5時，可判斷該機床為具有高度快捷性能的加工中心。</p><p&

22、gt;　　3. 工作臺與機床整體面積的比例應較小 </p><p>　　作為加工中心的用戶，他們希望工作臺及工作臺以外的部分所占空間應盡可能一些。尤其是孔加工這類加工成本較高而附加價值又較低的加工領域，最好使用那種結構緊湊的加工中心。如日本理化研究所試制的高速CNC銑床，其加工范圍為300mm2，機床本體所占面積950mm2，機床所占面積約為可加工最大工件尺寸的三倍，整個結構相當緊湊。該銑床主軸轉速為45000r

23、/min，可進行高速切削。主軸為XY方向移動式結構(工作臺僅限Z軸移動)，其加速度特性值G=1.5，表明該機床具有快捷動作功能。 4. 主軸可直接供給冷卻液 在鉆削過程中，加工L/D(鉆頭直徑與孔深之比)在5以上的孔必須特別注意排屑問題，最好選用帶供油孔的鉆頭，以便進行穩(wěn)定的加工。采用由主軸中心供給冷卻液的方式，對于更換卡具的鎖緊螺栓則更為方便。 5. 具有孔加工用CNC工具插補功能 CNC切削的