International Journal of Research in Engineering and Science (IJRES) ISSN (Online): 2320-9364, ISSN (Print): 2320-9356 www.ijres.org Volume 5 Issue 5 ǁ May. 2017 ǁ PP. 01-04
Based on The Robust Design of Gear Die Optimization Rong Fei1liu Sheng2 1,2
(College Of Materials Engineering shanghai University Of Engineering Science,Shanghai 201620,Chian)
ABSTRUCT: The article is based on the optimization of bevel gear (the modulus is 5.2 and the max diameter is 157mm) preforming Die, then optimizing the final Die. Due to the finished forging is cold sizing, so the load is higher than preforming, and lead to a higher wear depth. This article will through design the final Die to reduce the wear depth and load. Based on the simulation technology and Taguchi to optimize and analysis the Die scheme. At last, get the best optimization final Die, and instruct the reality production. Keywords: Bevel gear; Die; Taguchi robust design; optimization I.INTRODUCTION The optimization design of the final forging die of the bevel gear of this subject is based on the initial die optimization, and further optimizes the final forging die [1,2]. Since the maximum diameter of the straight bevel gear reaches 157mm, the final forging is cold finishing, so the load required during the forming process is larger, and the die wear is much larger than the pre forged die. So this chapter will be the traditional mold design of bevel gear cold forging and the inspection of the relevant literature based on the design of the two bevel gears finishing die, die die that combined combined bridge with diversion hole and bridge with the boss. Then the optimization of the final forging die is carried out by combining Taguchi robust design with the numerical simulation software[3-5], thus reducing the die wear and forming load and determining the optimum die scheme As shown in Fig. 1.1, the bevel gear is machined in turn, and the corresponding parameters of the bevel gear are shown in table 1.1. As shown in Figure 1.2, the combination of the flying bridge and the porthole die, as shown in Figure 1.3, is a combination of the flying bridge and the lug type die.
Fig1.1 Bevel gearFig1.2 Flash land and tap hole of final Die section view
II. OPTIMIZATION OF COMBINED DIE OF FLYING BRIDGE AND PORTHOLE HOLE The die is optimized by using small feature[6-8], and the corresponding signal-to-noise ratio (S/N) is calculated as follows: 1 N 10 log 10 ( X i2 ) (2-1) N i 1 According to the mould shown in Figure three, the 1.2 design variables correspond to the horizontal values, as shown in Table 2.1. The orthogonal table designed according to Taguchi method is shown in table 2,2. Tab 2.1 The levels of design variance 水平数 1 2 3
D/mm 22 24 26
R/mm 3 4 5
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H/mm 1 2 3
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