【正文】 shown in . The sample consists of three overflows, a runner, and a biscuit. Most samples had plete metal filling in the overflow and good surface finish. Only the samples produced with a higher solid fraction had the cold shut defect as shown in Table 3 and the representative samples with the cold shut defect is shown in . Representative picture of die casting part Surface defect of casting: (a) Misrun。 accepted 25 June 2010AbstractThe feasibility of semisolid die casting of ADC12 aluminum alloy was studied. The effects of plunger speed, gate thickness, and solid fraction of the slurry on the defects were determined. The defects investigated are gas and shrinkage porosity. In the experiments, semisolid slurry was prepared by the gasinduced semisolid (GISS) technique. Then, the slurry was transferred to the shot sleeve and injected into the die. The die and shot sleeve temperatures were kept at 180 176。固態(tài)現(xiàn)象,2006年,116/117:44 53。4) 鑄造零件制作樣品的微觀結(jié)構(gòu)是全國統(tǒng)一的。更大的開口可以幫助減少湍流和改善供料,這減少了縮松。一個(gè)代表性樣本所產(chǎn)生的半固態(tài)圖4代表顯微組織樣品在不同時(shí)期流變鑄造時(shí)間:(一)5 s?？偨Y(jié)本研究中所用的參數(shù)是表2所示。2 試驗(yàn)本研究中用到的材料是商業(yè)ADC12鋁合金。多年來一直使用鋁制部件這些部件通常使用高壓壓鑄過程大量生產(chǎn)。圖41 模具總裝圖致 謝首先我要感謝我的導(dǎo)師付大軍，他嚴(yán)謹(jǐn)細(xì)致一絲不茍的作風(fēng)一直是我工作學(xué)習(xí)中的榜樣，給我起到了指明燈的作用，他諄諄善誘的教誨和不拘一格的思路給了我無盡的啟迪，讓我很快就感受到了設(shè)計(jì)的樂趣并融入其中。2）定模套板定模套板的主要作用是設(shè)置澆口套，形成系統(tǒng)的通道，承受金屬液填充壓力的沖擊，而不產(chǎn)生型腔變形。一般為推板導(dǎo)柱，推板導(dǎo)套。而伸長某些復(fù)雜壓鑄件時(shí)，只有當(dāng)模具溫度控制在某一較狹窄范圍內(nèi)時(shí)，才能生產(chǎn)出合格的壓鑄件。注意避免在溢流槽和鑄件間產(chǎn)生熱節(jié)。滿足要求。為了避免與金屬硫撞擊型芯，沖蝕粘膜，金屬流引入方向與主型芯平行，而且這樣排氣效果良好。Hmax—壓鑄機(jī)所允許的最大模具厚度（mm），本設(shè)計(jì)壓鑄機(jī)允許的最大模具厚度為500mm；Hmin+10mmH設(shè)Hmax10mm=260mm280mm490mm,所以滿足設(shè)計(jì)要求。脹型力通常的計(jì)算方法為：模具分型面上承受金屬壓力部分的投影面積乘以壓射比壓。4）盡可能滿足鑄件的外觀質(zhì)量要求。由于可持續(xù)發(fā)展和環(huán)境保護(hù)的需要，汽車輕量化是實(shí)現(xiàn)環(huán)保、節(jié)能、節(jié)材，高速的最佳途徑。最初壓鑄的合金是常見的鉛和錫合金。因此，在設(shè)計(jì)過程中，必須通過分析壓鑄件的機(jī)構(gòu)特點(diǎn)。關(guān)鍵詞：壓鑄模，壓鑄工藝，模具設(shè)計(jì)AbstractIn die casting production, die casting die and die casting process, the production operation exists restrict each other, the close relationship between the influence each other。1907年瓦格納（Wagner）首先制成啟動活塞壓鑄機(jī)，用于生產(chǎn)鋁合金鑄件。因此，金屬壓鑄行業(yè)正面臨著發(fā)展的機(jī)遇，其應(yīng)用前景十分廣闊。應(yīng)盡可能有利于排氣。所以鎖模力F鎖≥。動模板行程就是壓鑄機(jī)在開模后模具分型面之間的實(shí)際距離。3）內(nèi)澆口厚度查表得內(nèi)澆口厚度為鑄件壁厚的40%~60%，取50%。在定型上為壓室的延長段用專用的澆口套形成，所以直澆道的直徑與壓室的直徑相同，為使壓射余料易從澆口套中取出，在靠近分型面的一端做出鑄造斜度。根據(jù)金屬壓鑄工藝與模具設(shè)計(jì)，60%=，103，本設(shè)計(jì)一共兩個(gè)溢流槽。在本設(shè)計(jì)中采用水冷法，在模具內(nèi)增設(shè)冷卻水通道，使循環(huán)水通入型芯內(nèi)，冷卻速度比風(fēng)冷快，生產(chǎn)效率高，控制比較方便。常用的限位元件一般為限位釘。推板在設(shè)計(jì)時(shí)應(yīng)考慮推板的厚度以保證強(qiáng)度和剛度的需要，防止因金屬液的間接沖擊或脫模阻力產(chǎn)生的變形，推板各個(gè)大平面應(yīng)相互平行，以保證推出元件運(yùn)行的穩(wěn)定性。采礦和材料工程專業(yè),工程學(xué)院,大學(xué)Songkla王子2。因此,最終的結(jié)構(gòu)部分充滿氣泡和氧化物夾雜。表1的化學(xué)成分鋁ADC12合金(質(zhì)量分?jǐn)?shù))Si Fe Cu Mn Mg Zn Ti Cr Ni Pb Sn Al Bal.在這個(gè)實(shí)驗(yàn)中,坩堝中ADC12鋁合金在通過電力爐加熱到100攝氏度以上達(dá)到熔點(diǎn)溫度(~ 680 C). 坩堝中大約200 g的鋁合金融化。DL是密度從Eq。多數(shù)樣品有完整的金屬填充溢出和良好的表面光潔度。相反,當(dāng)厚門是用于半固態(tài)壓鑄,只有樣本編碼SSM28和SSM29有缺陷,如表3所示,如圖9所示。[2] 鄭J,王建民問,趙P,吳c .優(yōu)化工藝參數(shù)的高壓壓鑄用人工神經(jīng)網(wǎng)絡(luò)[J]。[10] JORSTAD J, THIEMAN M, KAMM R. SLC: 最新的和最經(jīng)濟(jì)的方法來半固態(tài)金屬(SSM)鑄造[C]/ /第七屆國際會議的半固態(tài)合金及復(fù)合材料加工。 semisolid die casting。 (c) SSM26should not be too high because it will be difficult to inject into the die. Microstructure analysisThe representative microstructures of the samples produced by liquid die casting and semisolid die casting are shown in . Fine dendritic structure was observed in the samples from the liquid die casting process. However, in the samples from the semisolid die casting process the microstructure consisted of primary αphase, secondary αphase and eutectic phase. The primary αphase structure was produced by the GISS process, then grew larger in the die. αphase and eutectic structure were formed slurry flowed into the die. Because of the high cooling microstructure at therates, the sizes of secondary αphase and the eutectic Observation of the microstructure uniformity atαphase and eutectic structure were formed after the different positions is shown in . The obtainedslurry flowed into the die. Because of the high cooling micrographs illustrate that the microstructure at the rates, the sizes of secondary αphase and the eutectic positions A, B, C, and D are similar and uniform. Surface blister in samples: (a) Liquid die casting。 (b) 10 s。3. Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, 90112, ThailandReceived 13 May 2010。[8] HONG C P, KIM J M. 開發(fā)先進(jìn)流變過程及其應(yīng)用[J]。3) 好的半固態(tài)壓鑄鑄件需要合適的柱塞速度和固體分?jǐn)?shù)漿。,縮松和氣孔的尺寸較大影響宏觀缺陷。可以推論,在理想的固體狀態(tài)下ADC12鋁合金做成的半固態(tài)漿料在 不同流變過程中使用GISS過程。在這項(xiàng)研究中,孔隙度、表面缺陷、表面皰、宏觀和微觀結(jié)構(gòu)研究的樣本。a本研究的主要目標(biāo)是其可行性1)處理的鋁合金半固態(tài)ADC12使用氣體引起的半固態(tài)(GISS)技術(shù)和2)半固態(tài)壓鑄的商業(yè)部分。 流變鑄造第1章在電子、航天、和建筑領(lǐng)域。圖41為鑄件的總裝圖。1）定模座板再設(shè)計(jì)定模座板時(shí)，考慮澆口套安裝孔的位置與尺寸應(yīng)與壓鑄機(jī)壓室的定位法蘭配合，定模座板上應(yīng)留出緊固螺釘或安裝壓板的位置。導(dǎo)向元件的作用是保證推出機(jī)構(gòu)按既定方向平穩(wěn)可靠的往復(fù)運(yùn)動，又是還承受推板等構(gòu)件的重量。大多數(shù)形狀簡單，壓鑄工藝性好的壓鑄件對模具溫度控制要求不高，模具溫度在較大范圍內(nèi)變動仍能生產(chǎn)出合格的壓鑄件。在溢流槽上設(shè)置排氣槽時(shí)，應(yīng)合理設(shè)計(jì)溢流口，避免過早堵塞排氣槽。a90176。1）概述根據(jù)金屬壓鑄工藝與模具設(shè)計(jì)，選擇扇形彈鼓澆道。雖然可以通過模具高度調(diào)節(jié)裝置的相對位置來適應(yīng)所設(shè)計(jì)的壓鑄模厚度；但是動座板的可調(diào)節(jié)的最大距離是給定的，即調(diào)節(jié)舉例的范圍不超過壓鑄機(jī)所允許的最小模具厚度和最大模具厚度，因此要滿足：Hmin+10mmH設(shè)Hmax10mm（24）式中：Hmin—壓鑄機(jī)所允許的最小模具厚度(mm),本設(shè)計(jì)壓鑄機(jī)允許的最小模具厚度為250mm；H設(shè)—壓鑄模具的設(shè)計(jì)厚度（mm），根據(jù)對鑄件的分析，所設(shè)計(jì)的定模座板厚40mm，動模座板厚32mm，定模套板厚32mm，動模套板厚50mm，支撐板厚63mm，墊塊寬63mm，那么模具厚度為280mm。因此壓鑄機(jī)的鎖模力必須大于壓鑄時(shí)產(chǎn)生的脹型力。3）有利于保證鑄件的精度要求。近年來，汽車工業(yè)的飛速發(fā)展給壓鑄成型的生產(chǎn)帶來了機(jī)遇。1885年奧默根瑟勒（Mergenthaler）發(fā)明了鉛字壓鑄機(jī)。所以，金屬壓鑄模的設(shè)計(jì)，實(shí)質(zhì)上是對壓鑄生產(chǎn)過程中預(yù)計(jì)產(chǎn)生的結(jié)構(gòu)和可能出現(xiàn)各種問題的綜合反映。So, metal diecasting die design, is essentially to die casting process is expected to produce the structure and may appear all sorts of the prehensive reflection of a problem Therefore, in the design process, must through the analysis of the characteristics of die casting institutionsUnderstand the die casting technology parameters of the implementation of the possible to degree, master in the different conditions in the filling to consider economic conditions and the effects of factors to design the reasonable structure, reliable operation, and meet the production requirements of the die casting dieAnd because the metal diecasting die structure is relatively plex, manufacture accuracy high precision, when die casting die design and manufacture, after the pletion of the revision of the room is not big, so in the mold design should be careful thinking, careful meticulous, strive to appear not of principle error, in order to achieve the most eco