沖孔模設計外文翻譯

1、<p><b>　　外文資料</b></p><p>　　Piercing Die Design</p><p>　　A complete press tool for cutting two holes in work material at one stroke of the press, classified and standardized by a

2、 large manufacturer as a single-station piercing die.</p><p>　　Any complete press tool ,consisting of a pair( or a combination of pairs ) of mating members for producing pressworked ( stamped ) parts, includ

3、ing all supporting and actuating elements of the tool, is a die .Pressworking terminology commonly defines the female part of any complete press tool as a die.</p><p>　　The guide pins, or posts,are mounted i

4、n the lower shoe .The upper shoe contains bushings which slide on the guide pins .The assembly of the lower and upper shoes with guide pins and bushings is a die set .Die sets in many sizes and designs are commercially.&

5、lt;/p><p>　　A punnch holder mounted to the upper shoe holds two round punches (male members of the die) which are guided by bushings inserted in the stripper.A sleeve, or quill, encloses one punch to prevent it

6、s buckling under pressure from the ram of the press .Afer penetration of the work material,the two punches enter the die bushing for a slight distance.</p><p>　　The female member, or die, consists of two die

7、 bushings inswetwd in die block. Since this press tool punches holes to the diameters required, the diameters of the die bushings are larger than those of the punches by the amount of clearance.</p><p>　　Sin

8、ce the work material stock or workpiece can cling to a punch on the upstroke, it may be necessary to strip the material from the punch .Spring-loaded strippers hold the work material against the die block until the punch

9、es are withdrawn from the punched holes .A workpiece to be pierced is commonly held and located in a nest composed of flat plates shaped to encircle the outside part contours. Stock is positioned in dies by pins, blocks,

10、 or other types of stops for locating before the downstro</p><p>　　Blanking Die Design</p><p>　　A die replace the die bushing and the two piercing punches are replaced by one blanking punch .A

11、 stock stop is incorporated instead of nest plates .This is a drop-through design since the finished blanks drop through the die , the lower shoe , and the press bolster .</p><p>　　Large blanks are commonly

12、produced by an inverted die in which the die is mounted to the upper shoe with the punch secured to the bottom shoe . The passing of a large blank through the bolster is often impractical but its size may necessitate sec

13、tional die design .</p><p>　　Draft ,or angular clearance in an inverted die is unnecessary because the blank does not pass through it . For ease of construction , regrinding , and strength the cutting edges

14、 of each section should not include points and intricate contours . </p><p>　　The springs-loaded stripper is mounted on the lower shoe ; it travels upward in stripping the stock from the punch fastend to the

15、 lower shoe . Stripper bolts hold and guide the stripper in its travel . </p><p>　　On the upstroke of the ram , the upper end of the knockout rod strikes an arm on the press frame , which forces the lower en

16、d of the rod downward , through the die , and ejects the finished blank from the die cavity . A stop collar retains the rods and limits their travel . </p><p>　　Center of Pressure</p><p>　　If th

17、e coutour to be blanked is irregularly shaped , the summation of shearing forces on one side of the center of the ram may greatly exceed the forces the on the other side . Such irregularity results in a bending moment

18、in the press ram , and undesirable deflections and misalignment . It is therefore necessary to find a point about which the summation of shearing forces will be symmetrical . This point is called the center of pressure ,

19、 and is the center of gravity of the line that is the p</p><p>　　The press tool will be designed so that the center of pressure will be on the axis of the press ram when the tool is mounted in the press .<

20、;/p><p><b>　　中文翻譯</b></p><p><b>　　沖孔模設計</b></p><p>　　在一個壓力機行程中，在原材料上沖裁出兩個孔的一個完整的沖壓模具。一家大制造商將其分類并標準化為單工位沖孔模。</p><p>　　任意一副完整的沖壓模具，都是由一對（或多對）生產(chǎn)沖壓零件的配

21、合零件組成的，同時還包括模具上的固定支承零件和傳力連接零件。壓力加工術語上通常把所有沖壓模具上的凹件定義為凹模。</p><p>　　導柱安裝在下模座上。上模座安裝與導柱滑動配合的導套。上、下模座連同導柱、導套組成的部件稱為模架。市場上有多種模架尺寸和設計形式供選用。</p><p>　　安裝在上模座上的凸模固定板固定了兩個圓形凸模，這兩個圓形凸模（模具中的凸出部分）通過嵌入在卸料板上的模

22、套進行導向。安裝在一個細小凸模外圍的護套可以防止凸模在壓力機滑動的壓力作用下彎曲。在沖裁完工件后，兩個凸模還要伸入凹模襯套一小段距離。</p><p>　　凹模是由兩個嵌入在凹模板內(nèi)的襯套組成。由于沖孔模應沖出所要求的孔徑，所以凹模的襯套內(nèi)徑應稍大于凸模一個間隙值。</p><p>　　當廢料或工件粘在上行的凸模上時，必須從凸模上卸掉廢料。彈簧驅動的卸料板相對凹模板運動，將原材料卸下，直到

23、凸模從沖過的孔內(nèi)抽出。被沖孔的工件用定位板定位，定位板是與重建外形輪廓相符的平板。在滑塊下行之前，毛坯要在凹模內(nèi)通過定位銷、定位板或其它類型的定位裝置定位。</p><p><b>　　落料模設計</b></p><p>　　用一塊凹模板代替了凹模襯套和用一個落料凸模代替兩個沖孔凸模，而坯料的定位用定位板代替。由于沖出的落料件經(jīng)凹模、下模座和壓力機墊板內(nèi)孔下落，所以這

24、是一幅下出料方式的結構設計。</p><p>　　大型落料件通常采用倒裝式落料模，其凹模被安裝在上模座，而凸模被固定在下模座。大型落料件通過墊板的下出料方式來實現(xiàn)通常是不切實際的，而采用鑲拼式結構設計則比較合適。</p><p>　　對于倒裝式落料模，斜度或傾斜角處的間隙是不必要的，因為落料件不會采用下出料方式。為了使沖裁刃口結構簡單，便于修模，保證強度，每一個拼塊不應該存在刃口輪廓線的交

25、點和復雜輪廓。</p><p>　　彈簧驅動的卸料裝置固定在下模座，它向上運動可以從固定在下模座上的凸模上卸掉廢料，卸料螺栓對卸料動作起固定和導向作用。</p><p>　　在壓力機滑塊回程時，推桿的上端將撞到固定在壓力機機身上的打桿，推桿下端向下施力，通過模具使沖制的零件從模腔內(nèi)被推下。限位環(huán)用來擋住推桿并限制它的運動行程。</p><p><b>