锻压技术

预制坯形状对挖掘机斗齿终锻成形的影响

英文标题：Influence of preform shape on final forging for excavator bucket teeth

分类号：TG316

出版年,卷(期):页码：2019,44(9):1-6

摘要：

根据某型号矿用挖掘机斗齿形状特点，设计了两步成形的锻压工艺，试验样件存在两侧弧形凸起填充不满的问题。根据成形难点重新设计了预制坯，并使用Deform-3D有限元软件对斗齿锻压过程进行数值模拟，分析了锻造过程中的等效应变和金属流动规律，研究了锻造模具的受载荷情况。根据模拟结果对预制坯形状和尺寸进行修正，设计模具并进行生产试制。生产得到的斗齿锻件充填饱满、内部金属流线分布合理、无折叠飞边等缺陷，与模拟结果相一致。结果表明，通过对预制坯形状进行优化，能够有效降低斗齿成形难度、提高成形效果。该研究优化了斗齿锻造工艺，提供了一种合适的预制坯形状，为挖掘机斗齿的锻造生产提供了一种可行的工艺方法。

According to the shape characteristics of a certain type of mining excavator bucket teeth, the forging process of two-step forming was designed. There was the problem of insufficient filling of the curved protrusions on both sides of test sample. Then, the preform blank was redesigned according to the forming difficulty, and the forging process of bucket teeth was simulated by finite element software Deform-3D. Furthermore, the equivalent strain and metal flow law during the forging process were analyzed, and the load of forging mold was studied. According to the simulation results, the shape and sizes of preform blank were corrected, and the mold was designed to produce the trial production. Finally, the produced bucket teeth forgings were filled fully, the flow lines of internal metal distributed reasonably without folding flashes, which were consistent with the simulation results. The results show that by optimizing the shape of preform blank, it is possible to effectively reduce the difficulty of forming the bucket teeth and improve the forming effect. Thus, the bucket teeth forging process is optimized, and the suitable shape of preform blank is designed to provide a feasible process method for forging production of excavator bucket teeth.

基金项目：

郑州市科技重大专项资金（152PZDZX007）

曹民业（1995-），男，硕士研究生E-mail：18595819117@163.com；通讯作者：刘华（1962-），男，博士，博士生导师，研究员E-mail:13903832971@163.com

参考文献：

［1］许午阳. 挖掘机斗齿多向可控精密成形技术研究
［D］. 北京：机械科学研究总院, 2017.

Xu W Y. Research on Multi-directional Controllable Precision Forming Technology of Excavator Bucket
［D］. Beijing: Academy of Machinery Science & Technology, 2017.

［2］周志丹, 陈垣, 刘金龙. 提高挖掘机斗齿寿命的研究现状和发展
［J］. 煤矿机械, 2011, 32 (3):7-9.

Zhou Z D, Chen Y, Liu J L. Study on development and improving lifetime of excavator teeth
［J］. Coal Mine Machinery, 2011, 32(3):7-9.

［3］王春香,李乐,李双青.挖掘机斗齿的三维建模方法研究
［J］.矿山机械,2010,38(15):47-49.

Wang C X, Li L, Li S Q. Research on 3D modeling method of excavator teeth
［J］. Mining Machinery, 2010, 38(15): 47-49.

［4］姚会元. 一种挖掘机斗齿的制造方法
［P］. 中国: CN201010224603.1, 2010-10-20.

Yao H Y. Method for manufacturing excavator bucket teeth
［P］. China: CN201010224603.1, 2010-10-20.

［5］汪金保, 刘华, 孙红星, 等. 大直径带毂直齿轮冷精密成形数值模拟及工艺分析
［J］. 精密成形工程,2014, 6(6):104-110.

Wang J B, Liu H, Sun H X, et al. Numerical simulation and process analysis of cold precision forging for large-diameter spur gears with hub
［J］. Journal of Netshape Forming Engineering,2014, 6(6):104-110.

［6］刘光辉,刘百宣,刘华,等. 双法兰式三阀组阀体多向精密成形工艺
［J］. 精密成形工程, 2017, 9(2):58-62.

Liu G H,Liu B X,Liu H,et al. Multi-direction precision forming technology of double flanges tri-valve set body
［J］. Journal of Netshape Forming Engineering, 2017, 9(2):58-62.

［7］李炎粉,崔华丽.锻压工艺对挖掘机斗齿性能的影响研究
［J］.热加工工艺,2017,46(1):140-142, 145.

Li Y F, Cui H L. Effect of forging process on performance of excavator bucket teeth
［J］.Hot Working Technology, 2017, 46(1):140-142, 145.

［8］郭红,刘英,李卫.挖掘机斗齿的磨损机制与选材研究
［J］.材料导报,2014,28(7):99-103.

Guo H, Liu Y, Li W. The investigation of wear mechanism and material selection of bucket teeth on excavator
［J］.Materials Review,2014,28(7):99-103.

［9］周晓光,杨宗联,叶升平,等.挖掘机斗齿复合生产工艺
［J］.特种铸造及有色合金,2012,32(5):453-455.

Zhou X G, Yang Z L, Ye S P, et al. Manufacturing of excavator bucket teeth by composite technology of vacuum investment casting combining with steel ball chilling vibration
［J］.Special Casting & Nonferrous Alloys,2012,32(5):453-455.

［10］李京丽. 斗齿用低合金钢的优化热处理工艺研究
［D］. 长沙:中南大学,2012.

Li J L.Study on Optimized Heat Treatment Process of Low Alloy Steel for Tooth
［D］. Changsha: Central South University, 2012.

［11］许午阳, 刘华, 曹鋆汇, 等. 一种锻造斗齿用低合金耐磨钢热变形行为
［J］. 锻压技术, 2017, 42(2):128-132，138.

Xu W Y, Liu H, Cao J H, et al. Hot deformation behavior on low-alloy high-abrasive steel used for forging bucket teeth
［J］. Forging & Stamping Technology, 2017, 42(2):128-132，138.

［12］刘丹. 斜齿圆柱齿轮冷精密成形工艺及数值模拟研究
［D］. 北京:机械科学研究总院,2008.

Liu D. Research on Cold Precision Forming Process and Numerical Simulation of Helical Cylindrical Gear
［D］.Beijing: Academy of Machinery Science & Technology,2008.

［13］许午阳, 刘华, 刘百宣, 等. 基于热加工图的锻造斗齿用钢热加工工艺参数
［J］. 精密成形工程, 2017, 9(2):45-49.

Xu W Y, Liu H, Liu B X, et al. Hot processing parameters of steel for forging bucket teeth based on processing maps
［J］. Journal of Netshape Forming Engineering,2017, 9(2):45-49.

［14］曹民业,刘光辉,汪金保,等.一种挖掘机斗齿多向精密成形工艺研究
［J］.精密成形工程,2019,11(1):30-35.

Cao M Y, Liu G H, Wang J B, et al. Research on multi-directional precision forming process of excavator bucket teeth
［J］. Journal of Netshape Forming Engineering,2019, 11(1): 30-35.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】