【正文】 無需驗算而公差帶法計算復(fù)雜需要經(jīng)過多次初算驗算，且考慮因素較多 [9]。在設(shè)計推出脫模機(jī)構(gòu)時應(yīng)遵循下列原則。推力點應(yīng)該作用在制品剛性好的部位，如筋部、凸緣、殼體形制品的壁緣處，盡量避免推力點作用在制品的薄平面上，防止制件破裂、穿孔，如殼體形制件及筒形制件多采用推板推出。5）合模時的正確復(fù)位 設(shè)計推出機(jī)構(gòu)時，還必須考慮合模時機(jī)構(gòu)的正確復(fù)位，并保證不會與其他模具零件相干涉。 18 模架選用本設(shè)計采用CI2930A80B70C90的標(biāo)準(zhǔn)模架，此模架設(shè)計采用自動脫模，所以適合標(biāo)準(zhǔn)模架。P 腔 =kP 成k——損耗系數(shù)，這里取 1/3；P 成 ——塑件成型所需的注射壓力（MPa），P 成 =110—140MPa，這里 P 成 取140MPa。20所以 F=A+ A 1=10000mm2+=P 模 =103NP 腔 F==103N故 P 腔 F＜P 鎖 即所選注射機(jī)的鎖模力能符合要求。模具冷卻系統(tǒng)的設(shè)計原則：①冷卻水通道的設(shè)置 動定模和型腔的四周應(yīng)均勻地布置冷卻水道，不可只布置在模具的動模和定模邊，否則開模后的制品一側(cè)溫度高一側(cè)溫度低，在進(jìn)一步冷卻時會發(fā)生翹曲變形。目的不僅是簡單地檢驗一下模具是否能用，而且包括對模具設(shè)計合理性的評定以及對成型工藝條件的探索。（1）預(yù)檢 在模具裝上注射機(jī)前，應(yīng)根據(jù)圖紙對其進(jìn)行全面仔細(xì)檢查，以便及時發(fā)現(xiàn)問題進(jìn)行修模，以免裝上機(jī)后又拆下來。（4）調(diào)整頂桿頂出距離 模具壓穩(wěn)后便慢慢開模，直到動模板停止后退，然后調(diào)整頂桿位置。 試模（1）試模前，必須對設(shè)備的油路、水路以及電路等進(jìn)行檢查，并按照規(guī)定保養(yǎng)設(shè)備，做好開機(jī)前的準(zhǔn)備。然后按壓力、速率、溫度這樣的先后順序變動。制品產(chǎn)生飛邊。12普通銑床 平口 鉗 鉆頭 游標(biāo)卡尺3 挖槽 曲面粗加工挖槽 CNC 銑床 虎鉗 ￠3 銑刀游標(biāo)卡尺4 挖槽 曲面粗加工挖槽 CNC 銑床 虎鉗 ￠2 球刀游標(biāo)卡尺5 精加工曲面精加工平行銑削CNC 銑床 虎鉗 ￠1 球刀游標(biāo)卡尺6 攻螺紋剛性攻絲 4M8 虎鉗 絲錐9 鉆水路鉆 2248。5 通孔普通銑床 平口 鉗 鉆頭 游標(biāo)卡尺游標(biāo)卡尺5 挖槽 曲面粗加工挖槽 CNC 銑床 虎鉗 ￠3 銑刀游標(biāo)卡尺6 挖槽 曲面粗加工挖槽 CNC 銑床 虎鉗 ￠2 球刀游標(biāo)卡尺7 精加工曲面精加工平行銑削CNC 銑床 虎鉗 ￠1 球刀游標(biāo)卡尺8 攻螺紋剛性攻絲 4M8 虎鉗 絲錐9 鉆水路鉆 2248。 三年的大學(xué)生活就快走入尾聲，我們的校園生活就要劃上句號，心中是無盡的難舍與眷戀。 學(xué)友情深，情同兄妹。這是我們就業(yè)前的一次理論與實踐的熱身訓(xùn)練，也是對自己在大學(xué)三年中所學(xué)知識的一次總的檢驗。在這次設(shè)計過程中，本人有幸得到指導(dǎo)老師和同學(xué)們的熱心幫助，使自己可以順利地完成設(shè)計任務(wù)。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。s performers of the troupe still tour the region39。s Liaoning province, decades ago. The solider gave the old man a handmade saddle when they bid farewell. The story inspired Nasun to write Carved Saddle, a song that later became one of his most popular numbers. Now, every year, Nasun recruits young singers and dancers for the troupe. The troupe has also designed a new repertoire, which is mostly based on the daily lives of Mongolian people, especially the lives of nomadic families, and has bined contemporary musical elements with folk songs of the region. Haimu, a 25yearold khoomei (a local variant of overtone singing) singer, joined the troupe three years ago. Along with a sixmember band, he performs fast songs and soft ones that he writes－all while playing the horsehead fiddle.Although I learned the piano since childhood and grew up listening to various kinds of music, to me, the folk music of Inner Mongolia is the root, he says. Performing in remote villages is pleasant. I feel at home on the boundless grasslands, and the warm people there make me feel fulfilled. The first round of spring auction season in Beijing ended last week, but it failed to create much spring in the art market. Although two pieces of Chinese painting fetched more than 100 million yuan, the decline in trading volume and sa le rate showed a downturn this year. In the “Grand View: Chinese Painting Highlight” session at China Guardian 2022 spring auctions, Pan Tianshou’s representative work Eagle, Rock and Flora hit a record auction price of 279 million yuan, while Li Keran’s masterwork Jinggang Mountain fetched million yuan, an unexpected high in recent years. However, the trading volume fells to billion yuan from billion yuan in the same period the year before. The Huangchen 2022 Spring Auctions, which recorded million yuan in total sales, experienced the same. The section number went down to 5 from 12 pared to last year. According to expert Shao Jianwu, the art market did not attract much excitement this year due to the booming stock market and the persistent problems of fery and fake deals. The two pieces of Chinese painting notched up high price this spring due to their own value not due to a revival in the market. The successful transaction of two works with a hammer price of more than 100 million yuan once again confirms that valuable and rare works of high quality always earn the longlasting high price. Chinese painting and calligraphy is still the pillar of the market. However, the overall sales rate has dropped slightly, which reflects the demand for the ordinary auction goods has weakened,” said the president of China Guardian’s Hu Yanyan. Besides, the entry of new buyers also makes certain changes to the direction of purchasing. In a word, the overall market trend is very unpredictable. Although China Guardian 2022 Spring Auctions has achieved remarkable results, it does not mean that the market has walked out of the predicament. We still have to wait for the big economic boom to invigorate the art market.” Even so, the hot pursuit of some special items appeared this spring. A special session of China Guardian Spring Auctions titled “Fine Gilt—Bronze Buddhist Images” achieved a great deal with total sales volume of million yuan and 92 percent sale rate. The 5th Shamar Rinpoche Statue from 1617th century of Tibet was sold for million yuan. The Beijing Chengxuan Auctions featured almost 2,800 items of coins and stamps in three sessions with good sale rate. The Huachen Auctions also set a special session of photographs under the condition of largescale decline of auction sessions. There was a palpable dull thud of disappointment that acpanied the return of the imperial entourage of Zhen Huan to her homeland. It followed a couple years of hushed excitement as Chinese fans were fed tidbits about their proud concubine who was supposed to conquer the high ground of the North American market. Zhen Huan is, of course, the title character of The Legend of Zhen Huan, a 2022 television series that swept China off its feet and later took other Asian countries by storm. Two years ago, it was reported that HBO, a premium cable service headquartered in the United States, was going to air it in North America after some modification. Now, a condensed version that provides English subtitles but no dubbing has finally been made available on Netflix for online streaming. This version, highly anticipated as a milestone in China3