【正文】 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 China39。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。 綜上所述，再查閱有關(guān)資料，得出方案一優(yōu)于方案二，故選擇方案二，那么安裝電動機(jī)的幾座要高于水平機(jī)座 21mm，且凸出部分厚度為 5mm，其余部分厚度為 10mm。 第七章 機(jī)座的設(shè)計(jì) 首先，根據(jù)導(dǎo)軌進(jìn)給系統(tǒng)與電動機(jī)的大小，以及二者的位置分析，將機(jī)座設(shè)定為330*255mm。本切割機(jī)采用燕尾槽型導(dǎo)軌，需要在 水平方向上調(diào)整間隙。根據(jù)情況選擇螺桿直徑為 12mm， 螺距為 5mm，當(dāng)手輪旋轉(zhuǎn)一周時螺桿前進(jìn)了 5mm。 28′ 。通過計(jì)算可知 ,若要實(shí)現(xiàn)壓桿前進(jìn) 50mm ,手輪需旋轉(zhuǎn) 10圈。 軸的內(nèi)部為了連接電動機(jī)的軸所以為空心，其空心長度為 23mm，直徑為 11mm。 軸的撓度計(jì)算 齊魯工業(yè)大學(xué) 2022 屆本科生畢業(yè)設(shè)計(jì)（論文） 9 由于軸與電機(jī)軸同步轉(zhuǎn)動，選擇聯(lián)軸器。 第三章 總的設(shè)計(jì)方案與電動機(jī)的選擇 方案擬定與設(shè)計(jì)內(nèi)容 根據(jù)工件運(yùn)動和砂輪片運(yùn)動 形式可將金相切割機(jī)分為兩類，一類為工件運(yùn)動，砂輪片固定不動的切割機(jī)；另一類為工件固定不動，砂輪片運(yùn)動的切割機(jī)。選擇可靠性高的金相試樣切割機(jī)，可以提高制樣效率和質(zhì)量，降低成本，提高經(jīng)濟(jì)效益。通常，金相試樣的制備要經(jīng)過取樣、鑲嵌、磨光和拋光幾個步驟。 本設(shè)計(jì)通過對金相試樣切割機(jī)的整體造型、機(jī)械結(jié)構(gòu)和控制系統(tǒng)進(jìn)行了分析，完成了切割機(jī)主體結(jié)構(gòu)的設(shè)計(jì)，控制系統(tǒng)采用了銑床導(dǎo)軌原理，實(shí)現(xiàn)了低成本和手動化。 關(guān)鍵詞 ： 金相試樣 切割機(jī) 機(jī)械設(shè)計(jì) 手動控制 控制系統(tǒng) 低成本 齊魯工業(yè)大學(xué)