鎖擋模具技術設計畢業論文-資料下載頁

　　

【正文】 雖然模具種類繁多，但其發展重點應該是既能滿足大量需要，又有較高技術含量，特別是目前國內尚不能自給，需大量進口的模具和能代表發展方向的大型、精密、復雜、長壽命模具。模具標準件的種類、數量、水平、生產集中度等對整個模具行業的發展有重大影響。因此，一些重要的模具標準件也必須重點發展，而且其發展速度應快于模具的發展速度，這樣才能不斷提高我國模具標準化水平，從而提高模具質量，縮短模具生產周期，降低成本。由于我國的模具產品在國際市場上占有較大的價格優勢，因此對于出口前景好的模具產品也應作為重點來發展。根據上述需要量大、技術含量高、代表發展方向、出口前景好的原則選擇重點發展產品，而且所選產品必須目前已有一定技術基礎，屬于有條件、有可能發展起來的產品。 根據“十一五”模具行業發展規劃，“十一五”期間模具產品發展重點主要有如下幾類： （1）.汽車覆蓋件模具 沖壓模具占模具總量的40%以上。汽車覆蓋件模具主要為汽車配套，也包括為農用車、工程機械和農機配套的覆蓋件模具，它在沖壓模具中具有很大的代表性，模具大都是大中型，結構復雜，技術要求高。尤其是為轎車配套的覆蓋件模具，要求更高，可以代表沖壓模具的水平。此類模具我國已有一定的技術基礎，已為中檔轎車配套，但水平還不高，能力不足，目前滿足率只有一半左右。中高檔轎車覆蓋件模具主要依靠進口，已成為汽車發展的瓶頸，極大的影響著車型開發。 （2）.精密沖壓模具 多工位級進模和精沖模代表了沖壓模具的發展方向，精度要求壽命要求極高，主要為電子工業、汽車、儀器儀表、電機電器等配套。這兩種模具，國內已有相當基礎，并已引進了國外技術及設備，個別企業生產的產品已達到世界水平，但大部分企業仍有較大差距，供應總量不足，進口很多。（3）.大型精密塑料模具 塑料模具占模具總量近40%，而且這個比例還在上升。塑料模具中為汽車和家電配套的大型注塑模具，為集成電路配套的塑封模，為電子信息產業和機械及包裝配套的多層、多腔、多材質、多色精密注塑模，為新型建材及節水農業配套的塑料異型材擠出模及管路和噴頭模具等，目前雖然已有相當技術基礎并正在快速發展，但技術水平與國外仍有較大差距，總量供不應求，每年的進口額達幾億美元。 （4）.主要模具標準件 目前國內已有較大產量的模具標準件主要是模架、導向件、推桿推管、彈性元件等。這些產品不但國內配套大量需要，出口前景也很好，應繼續大力發展。氮氣缸和熱流道元件主要依靠進口，應在現有基礎上提高水平，形成標準并組織規模化生產。（5）.其他高技術含量的模具 占模具總量給8%的壓鑄模具中，大型薄壁精密壓鑄技術含量高，難度大。鎂合金壓鑄模具目前雖然剛起步，但發展前景好，有代表性。子午線橡膠輪胎模具也是發展方向，其中活絡模技術難度最大。與快速成型技術相結合的一些快速制模技術及相應的快速經濟模具具有很好的發展前景。這些高技術含量的模具在“十一五”期間也應重點發展。附錄BMold design and manufactureMold process is an important basis for the manufacturing industry in China, mold manufacturing equipment industry are dedicated. Although China started very using molds early , it did not form longterm industry. Until 20th century 80s, China Mold Industry Development has entered the fast lane. In recently, not only stateowned enterprises have made great developed , the threeinvested enterprises, township (individual) enterprise development tool also very rapid.Although China39。s mold industry has a rapid development, it is in short supply pared with the demand, its gap main focuses on the precision, large, plex, longlife field of mold. As a result of the precision, life and productivity of the manufacturing cycle and so on, there is still a wide gap between China and the developed ,China needs a lot of imports each year .China39。s mold industry in addition to continuing to improve productivity, in the future it must focus on the internal structure of the industry adjustment and raising the level of technological development. In structural adjustment, it is adjusted to bee a professional enterprise structure, Product structural towards highend tool in the development of improvements to the import and export, highgrade automotive panel forming mold analysis and structural improvements, multifunctional posite tooling and posite processing and laser technology in the mold design and manufacturing applications, highspeed cutting, super finishing and polishing technology, information and direction Develops.In recent years, the mold industry pace of structural adjustment and reform efforts, it primarily in largescale, precision, plex, longlife, middlegrade standard die and mold growth rate is greater than the general mold products。 Plastic and proportion of diecasting mold have a larger rate。 Professional mold factory and its production capacity to increase the number。 funded and the rapid development of private enterprises。 pace, such as jointstock transformation. Judging from the geographical distribution to the Pearl River Delta and Yangtze River Delta as the center of the southeast coastal areas to develop faster than the central and western regions, the development of the South than the North. At present, the fastest growing, mold production is most concentrated in Guangdong and Zhejiang provinces, Jiangsu, Shanghai, Anhui and Shandong and other places in recent years also have further development.Although the total amount of mold present in our country have reached a certain size, mold levels have greatly improved, but the level of design and manufacture a whole lags behind Germany, the United States, Japan, France, Italy and other industrialized countries, many. The existing problems and gaps in the main performance in the following aspects:(1) the total amount doesn39。t up with the demand The allocation of domestic mold was only around 70%. An oversupply of the middle mold, mold in the highend selfrate was only 50%. (2) the organizational structure of enterprises, product mix, technological structure and import and export structure are unreasonable Mold manufacturing plant in China is mostly selfproduced the Tool amp。 Die shop (factory), the proportion of selfproduced as much as 60%, while the more than 70% of die mold products. Most professional mold factory is large and all, small and plete forms of organization, and abroad are small and dedicated, small but excellent. Largescale, precision, plex, longlife mold accounted for less than 30% of the total, while overseas in more than 50%. In 2004, the mold for the :1 ratio of imports and exports, the net imports and exports reached billion . dollars of imports, the net import for the world39。s largest country mold. (3) the level of die products is much lower than international standards, the production cycle is higher than the international standard .Products mainly manifested in low levels of precision molds, cavity surface roughness, and structure of life and so on. (4) the development of the capacity of poor, poor costeffectiveness Business and technical personnel in China die proportion of low, lower level, and do not attach importance to product development, often in the market in a passive position. Workers die in China each year to create an average value of about 10,000 . dollars, foreign mold most industrialized countries is 15 to 20 million, some as high as 25 to 30 million, with a relative die in our country a considerable number of panies also use the workshop management,only small business enterprise realize the modernization .There are many reasons for these disparities,