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压射冲头使用寿命的影响因素分析与试验研究.pdf

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压射冲头 使用寿命 影响 因素 分析 试验 研究
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â   h P ¨ p  ¥ • Y y Í s  Ð k  ù î ½ y § 1 null £ null Ú 1, 2 null Û ½ î 1 null ç null 1 null  ¿ Ü 1 null f m £ 1 ( 1.广东鸿图科技股份有限公司;2.华中科技大学材料成形与模具技术国家重点实验室) K null 1 null â   h ^ â ü Ï   × 1 ¥ B ñ £ q ,  p  ¥ É  ° ¤ • Y ž â ü 3 Á ¥ r q Ð î ' b[ HT200 h ¹  ` ,ù î  B Õ W u T Ï  £ e Å Z E , k   Y £ Ï  H W a ¥ † W #  â   h P ¨ p  ¥ • Y b² T V ü , ¥ † W # Ð Ï  H W  â   h ¥ P ¨ p  • Y “ v ,’ ¥ † W # e Å  0.08~ 0.16 mm H , h ¥ P ¨ p   É b   ¥ † W u / , h Ï  H W ¹ 35 s H , h ¥ P ¨ p  K É , V r 1600  Q P · b 1 o M null â ü ;â   h ; p  ; Ï  £ ; ¥ † W # Ï m s Ë | null TG249. 2null null null null Ó D S ½ ’ null Anull Ó c I | null 1001- 2249(2010) 03- 0238- 03 DOI:10.3870/ tzzz.2010.03. 014 l à ° ù : 2009null05null25;© ¿ à l ž ° ù : 2010null01null09 » B T € e º :½ y § , 3 ,1981 M  3 ,ý ñ = , r bm 1¹ r ª ¥  h v Ë b 图1null 失效冲头的照片 2null 冲头使用寿命的影响因素 â ü   h ¥ P ¨ H q 1  ¯  ,V 7 • Y  P ¨ p  ¥ y Í 9 “  b“   h ' µ  Ú ¥ r b¹ N 7 ?  B Õ L H ¥  h Ï  £ e Å Z E b  h Ï  £ ¥ L H S e ü ^  â ü   “ ¤ B ñ È H D (â ü  ' È H D ü H H W þ É , h Ñ  V ® , h l ê v , h Ð â  i ¥ ¥ † W # V v , h Ð â  i W ] “ À µ ™ î † Ø ¥ ˆ ¬ ,] “ ¸ ^ r b î [   h Ð â  i ™ î † Ø ˆ ¬ ¥ H q / ,s ž B ñ † Ø ¥ Y £ Ï  H W ,ü V [ “ z ¹ 4 Ú  h ¥ P ¨ p  b 4null 冲头使用寿命的试验结果及分析 4. 1null ¥ † W #   h P ¨ p  ¥ • Y [ HT200 h „ H13‹ É ¥ â  i ¥ † ¹ è , ‚ ¿ M â  i = d  j ¥ f ƒ / ,º ¿ M  h ¥  / Ê µ , k    h Ð â  i ¥ ¥ † W #   h p  ¥ • Y ,² T n V 1b V 1null ¥ † W #   h P ¨ p  ¥ • Y (d W u T Ï  )  h ? ì /mm  h p  /(  Q %ñ - 1) 1 2 3 4 5 6 7 8 9 10 Ü ( p  / (  Q %ñ - 1) null110- 0.06- 0.10 726 759 718 753 802 814 778 794 735 764 764 null110- 0.08- 0.12 956 1023 10561128 938 995 1037 1140 984 976 1023 null110- 0.10- 0.14 886 859 887 869 921 867 935 868 946 897 893 null110- 0.12- 0.16 653 596 609 621 608 604 586 764 655 647 634 null null â ü  ¹ 16 500 kNã T Ï i â ü  ,â  i = d ° å ¹ null110+ 0. 04- 0 mm, ! ç 4Õ ‚ ] Ê µ ¥ k   h (n V 1) , k  H ò | 10ñ  h ¥ ©  ” b null null V 1 ” V ü , À µ Ï  £ L H S e ¥ f ƒ / ,  j ¹ null110- 0. 08- 0. 12 mm ¥  h p  K É , Ü ( p  r ž 1 023  Q /ñ b’ ¥ † W # M v  M l H , h ¥ p  ( ê  , O µ  ü A b 4.2null Ï  H W   h P ¨ p  ¥ • Y  ’ ç  h ? ì ¹ null110- 0. 08- 0. 12 mma Ï  £ 5 ° å ¹ null12 mma Ï  £ â ¹ 250 kPa,  ð â ü H q ‚ M H ,© ç  W u T Ï  Z T / Y £ ¥ Ï  H W   h p  ¥ • Y b k  H ,s Y ! ç 8ñ Ï  H W  ,' ¹ 20a25a 30a35a40a45a50a55 s,² T n V 2b V 2null ‚ ] Ï  H W   h p  ¥ • Y Ï  H W / s  h p  /(  Q %ñ - 1) 1 2 3 4 5 6 7 8 9 10 Ü ( p  / (  Q %ñ - 1) 20 569 531 568 603 508 486 537 546 472 481 530 25 986 1 034 867 965 768 815 743 832 764 867 864 30 1 393 1 564 1 482 1 531 1 447 1 356 1 211 1 347 1 296 1 248 1 387 35 1 500 1 610 1 579 1 429 1 796 1 642 1 489 1 657 1 534 1 683 1 591 40 1 402 1 398 1 465 1 487 1 400 1 438 1 389 1 531 1 490 1 358 1 435 45 1 428 1 399 1 501 1 386 1 295 1 317 1 286 1 108 1 327 1 276 1 332 50 1 164 1 198 1 206 1 221 1 093 1 217 1 104 1 006 1 062 1 105 1 137 55 963 975 10231 146 964 987 1 0081 0271 1061 006 1020 null null V V 2 V [ A  ,  ¨   h Ï  £ L H S e “ d ª , ¿ null110- 0. 08- 0. 12 mm ? ì ¥  h , Ï  £ 7 Y 35 s H  h p  K É , Ü ( p  r ž 1 591  Q /ñ b  h Ð â  i ^ M º G i ¥ “ d bB î ) ‚ H È È L !  h S Ô  û B ç ¥ õ œ  „ ° L   â  i Ï Á î b 3 Á Ï  L ‚ – , h Ð â  i W µ B ç ¥ ¥ † „ W # ,V v V l û ‚ z b L l V ü , null110¥ HT200 ü M  h Ð H13 â  i ¥ Ø X W # ¹ 0. 08~ 0. 16 mmbâ  H ,’ W # v ¿ ƒ ñ u W ´ H , h † Á A ü V ? É Æ W # ,i  C õ  „ _ P ,° ¤  Á V   å „  h p  ¥ h  ;  T W # l ¿ ƒ ñ u W ´ H ,5 { Ÿ Ð ! ç ¥ â  Î  M  l „ ‚ x Ø b e Å “ ¸ W # A ¶ V F ý Å /   ,ø ì e Å F ý  µ bþ Ø ¥ £ × ç Ÿ ^  $ ,y N 1  û Ø X ¥ W # , h ¶ 1 Ï  b V ! 9  I n , h ¥ P ¨ p  ö 1 | % ¿ Ñ  e Å b L = ©  ² T V ü ,Y £ Ï  H W e Å  35 s, h ¥ Ñ  ) ¿ 110~ 140 l W null à Ó ~ (上海交通大学轻合金精密成型国家工程研究中心,金属基复合材料国家重点实验室) K null 1 null ù î i  1  ‡ bâ ü 3 Á ¥ AZ91D„ AM60† Á h ‘ ó ü q ¥ ± 4 F ® a ï Ð Ÿ ? , I ³  £ ) Ø ý \   Ÿ ? ¥ • Y b² T V ü , AZ91D„ AM60‡ bâ ü q F ® ( ®  8 nullnullMg „ Mg17 Al12M F î ,% · ) Ø ª Mg17Al12M h , H r ) Ø ª  [ d õ à M ™ T   bAZ91D „ AM60ü q ( ?  £ ) Ø ª ) ,£ Ú .â ü Ï  † F â / Œ ¥ 7 ? Ð ‹ ¨ [ J]. + Õ ü / # µ ä † Á , 2008, 28(12): 943null946. [2] null  v ,u Z o . â ü 3 Á Ï ¥ Ñ  e Å [ J]. + Õ ü / # µ ä † Á , 1999(4): 22null23. [3] null f ä  ,£ Ú ,Û ½ î . v ˜ ¯  h † Á  Ú î ï † q ¥ â ü / Œ 7 ? # É  e Å [J]. + Õ ü / # µ ä † Á , 2009, 29( 11): 1 030null 1 032. [4] null Ì . â ü  â   h ¥ ¿ É [J].ü / / Œ , 2004, 25(10): 787null 788. [5] null f x  . õ ü o M ˜ ‹  â ü   h  ¥ ‹ ¨ [ J]. ü / / Œ , 2000, 21(2): 24null26. [6] null ë 5 § .† Á o  ü M  â ü  â   h  ¥ ‹ ¨ [J].ü / / Œ , 2006, 27(6): 565null566. [7] null Ï S  € ý ñ Ð ö ü / s ö .ü / m ¨ (» 5  %ü / ý \ )[M ].  Ø : € ý   ñ , 2002. [8] null ñ = ì .â ü / Œ e ü m ¨ [M]. Ü : ê S /  ñ , 2006. (I  :ï ’ S ) 240 â ï ü / + Õ ü / # µ ä † Á null 2010 M » 30  » 3 ù served with 11% selfnullinoculator addition after the melt is processed by SIM at 6502. School of Mathematical Science, Harbin University of Nornull mal,Harbin, China)2010, 30(3)0231~ 0233 Abstract A new technology for metal matrix composnull ites ∋∋∋ liquid infiltrationnullforging densification under pressure was proposed based on the analysis of some traditional methods. And the Al2O3f % SiCp/Al comnull posites were prepared by the methods. Microstructure and performance testing show that interface bonding of the composites exhibits metallurgical bonding with compact structure and excellent properties. The typinull cal parts∋∋∋ loading wheel was produced by the methnull od, realizing the liquid forging integral forming benull tween wearnullresistant composites ring and main body. Key Words: Local Reinforcement, Metal Matrix Comnull posites, Liquid Forging, Integral Forming Production of Motorcycle Brake Clamp Body by Squeenull zing Casting Luo Jixiang1, Han Mingxing1, Huang Yingbin2 , Chen Yun1 , Luo Guojian1(1. School of Lonull gistic Engineering, Wuhan University of Technology, Wuhan, China; 2. Zhejiang Yuhuan Kailing Group Co., Ltd., Yuhuan, China) 2010, 30(3)0234~ 0237 Abstract Aiming at structural features of motorcycle brake clamp body, based on 2D model designed by the Auto CAD, visualization of the model was developed with the help of 3DnullMAX software on established 3D model platform by Pro/ E software, and flow field and temperature field in the parts during filling process were simulated by theJSCast software. Thesimulated results are well in agreement with the experimental ones, so potential defects and their position in the parts were predicted by the model, and processing denull sign was examined by the JSCast software with the completion of optimized design. Solidification process was obviously improved as a result of uniform distrinull bution of temperaturefield in wall thickness by setting core at thick position of the parts, eliminating the hot spot in thick position and improving the quality of the parts. Key Words: SqueezingCasting, Filling, Solidification, Visualization, Numerical Simulation Factors Influencing Service Life of Injection Punch Heads and Its Experiment An Zhaoyong1, Wan Li1,2, Huang Zhiyuan1, Chen Liang1, Liao Weiping1, Zhang Xiaoshui1 (1. Guangdong Hongtu Technology Co. , Ltd. , Gaoyao, China; 2. State Key Laboratory of Materials Processing and Die & Mold Technology, Huazhong University of Science and Technology, Wunull han, China) 2010, 30(3)0238~ 0240 Abstract Injection punch heads as a key assistant part in die casting machine, its service lif directly affected the manufacturing efficiency and cost. A new internull mittent cooling method was presented for the injection punch heads made by HT200. Effects of tolerance and cooling time on service lifeof the injection punch heads were analyzed. The results reveal that service life of the heads is closely related to thetolerance and cooling time. The punch heads exhibits a longer service life with toleranceat 0.08~ 0. 16 mm. Furthermore, servnull ice life of theHT200 punch heads can reach up to 1600 times under theoptimized tolerance of 0.08~ 0.16 mm and cooling time of 35 s. Key Words: DieCasting, InjectionPunch Heads, Servnull iceLife, CoolingWater, Tolerance Production of MagnesiumAlloyShockAbsorptionTower byVacuumDieCasting Lin Ling, Zeng Xiaoqin, Ding Wenjiang ( National Engineering Research Center of Light Alloy Net Forming, State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong Univernull sity, Shanghai, China) 2010, 30(3)0240~ 0243 Abstract Microstructure and mechanical properties of AZ91D shock absorption tower and AM60 shock abnull sorption tower produced by vacuum die casting were analyzed comparatively, and effects of heat treatment were examined. Microstructures of both AZ91D and AM60 magnesium alloy parts are composed of nullnullMg matrix and nullMg17Al12 phase, in which nullMg17Al12 phase disappears after solid solution and it is precipitanull ted as discontinuous phase after aging treatment. Alnull though both AZ91D and AM60 alloy parts can be strengthened by heat treatment, strengthening effect on AZ91D alloy parts are superior to that on AM60 alnull loy parts. In addition, gas hole in the parts can be efnull fectively eliminated, however, shrinkage defects can not completely eliminated by vacuum die casting. Menull chanical properties of the vacuum die casting parts can (
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本文标题:压射冲头使用寿命的影响因素分析与试验研究.pdf
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