one kind of bud-shaped forging of the forging process analysis diagram shown in Figure l. Beat piece 251 Figure Figure 1 of this material is strong 2Cr13 stainless steel forgings, volume 40, forging a narrow temperature range, we use 250kg air free forging,hollister scs. Forging Weight 1,Hollister wien.65kg, with the fire consumed the first rough cut weight 2.1kg, cutting size ~ 60 × 95. This forging in terms of material point of view, or from the complexity of the factors are very difficult to consider forming forgings. This forging of the biggest technical difficulty is 40 × 60 face difficult card out of the buds. Process requirements blacksmith made 40 bore, thickness of the drain plate 60 a. We use two methods of similar processes, the effect is quite different. 1,hollister ireland. Process compared to the bud-shaped pieces of the original upsetting forging process and improved forging process of comparing column in Table l. 2. Effects of riveting more rust Hang Tun Table 1 of the original r forging forging forging process and the improved contrast of the original forging process removal Mount improved industrial forging deformation processes of boron removal process times the fire resistance class Mu pressure deformation processes play wide -1-1 compression sac , F + __1n laugh hanging Taiwan Taiwan trapped. lIIl (] Ye Ni Hui Hui head hit flat playing surface iI 2 emblem forged from C === b) {play flat L emblem forging work] 3 [t hit flat complex (tI4 classes) 2] made good at two levels linked to two ∈ accounting accounting level 3 pull ∈ insects are more positive use of the same blank, the application of the same equipment and tooling, the effect varies greatly. Application of the original forging process, the production of four, qualified 3. Main problems are as follows: (1) 40 end of the first concave varying degrees of heart, of which two form a sandwich; (2) in leaf shape and shank junction folding defects occur; (3) forging a very irregular, and the production and inefficient. Application of improved technology, produced a total of 38, except two blade sizes for repair, the rest are all qualified. Complete forging technology 17 1995 2 17 2 / forging time on the oxidation (burning) of the Coal Mine Machinery Factory of Beijing pass safety standards, and Lin flesh learn fr,abercrombie,. Abstract This paper discusses the heated metal, the impact of oxidation (burning) of several key factors, such as: heating temperature sour, heating time, the furnace gas composition and the chemical composition of metals and metal billets relative surface area,hollister, and discussed the forging of burning computational problems. That the correct calculation of the heating norms primarily by burning billets relative surface area (surface area and mass ratio) as the basis, and gives several burning heating mode and two tables calculate the thickness of the blank to The Q test, clean. r. '. , Keywords pad dignified fall i wire count blanks 1T. _ _-● r an eleven. , A, I, / eight II pieces, in a certain production conditions, the material re-calculation error, with the exception foreword by forging complex shapes, volume calculation error, is that burning the calculation error. If it is free forging, forging production plant is generally not in the burning of metal is a heavy seasoning weight calculation test, therefore, important for the calculation of expected accuracy problems. For hot forging + production,abercrombie, you should do the process of even higher if several tons, dozens of tons of steel and even more expected of course also includes a re-trial for forging material has been cutting to size, once the material re- The calculation is wrong, to overcome the end of the first concave heart defects, reducing the fire times, forging quality has significantly improved the appearance of 3. Analysis of improved process technology the biggest difference is in the original forging process based on the first play to increase the flat process. The following is a combination of their own forging process effectiveness analysis features,abercrombie amsterdam. (1) the application of the original process method, compression pull station, the hammer and the forging of small contact area, card table is small, only 60 × 30, material center of distortion, so the formation of concave heart defects in the application of improved methods of forging process, along the radial direction is the first blank is equivalent to playing flat radial upsetting, billets formed around the protruding material flow along the radial direction of the large,Abercrombie nederland, but the length remained the same; and then pull the compression station, the both ends of the convex the end of the first part of the heart to form the Ministry of depression compensation,hollister, the concave heart defects greatly reduced or even disappear 18 (2) using the original forging process, forging the first round after the two sets of radial difference between large, flat leaves play, due to large deformation, physical connection is easy to produce two folding defects, and hit into a 40ram thick flat oval with the same shank diameter, after upsetting then leaves, leaf thickness and size difference between the shank greatly reduced,hollister, resulting in two physical connections folding greatly reduce the chance of missing dance (3) oblate compression to overcome the phenomenon of clamp with meat, forging almost no clips in the rotation, improved compression efficiency. (4) Department of upsetting leakage Handicap 5 to 8 should be ground into a corner,hollister, which eliminates the physical connection of the two folding defects. However, rounded corners can not be too large, over the General Assembly to increase the consumption of metallic materials. Rounded by the regulation, will play a useful role. Short, flat drawing by playing the long process, improve the stretching effect, it is suitable for a small card table, cross-sectional difference between the freshman class of forgings stretching Topics related articles:        相关的主题文章： Zhou Lian. Materials Science and Engineering Manual EM]. Beijing 9 and other process parameters the same Placed side by side for a few or a dozen parts

,Abercrombie nederland S-shaped pieces forming process parameter optimization and experimental study analysis shows that, based on PFEA, ANN and GA for the S-shaped pieces forming process parameter optimization is feasible, and has some practical value. References: [1] Xie Shikun,abercrombie. Mesh and its parameterization in sheet metal forming finite element analysis should be [5] [6] [7] [8] with [D]. Nanchang: Nanchang University, 2005. Tanjian Hao, Zhang Jing. Based on orthogonal planning forging process design criteria for optimal experimental study [J]. Forging Technology, 2006,31 (2) :97-101. Xie Shikun, flowers,abercrombie amsterdam, Guo-Tai Yang. CAD / CAE integration in the finite element model of conversion of [J]. China Mechanical Engineering, 2005,16 (5) :428-431. Xie Shikun, flowers, Guo-Tai Yang, et al. The parameters of the complex curved surface meshing method [J],hollister. Plasticity Engineering, 2005,12 (1) :29-33. Xiao Guanyun, Xie Shikun, flowers, and so on. Based on PFEA, ANN and GA U-shaped pieces of sheet metal forming the shape optimization [J],hollister ireland. Mold Industry, 2006,32 (12) :1-2. NaderAsnafi. Onstretchandshrinkflangingofsheetalumi-numbyfluidforming [J],hollister. MaterialsProcessingTechnology ,1999,96:198-214. Xie Shikun, flowers, Guo-Tai Yang, et al. Dynamic explicit algorithm based on the automotive panel forming process finite element [A]. North Third Conference Proceedings Plasticity [C]. Baotou ,2004.71-75. Hecht-NielsenR. Theoryoftheback-Propagationneuralnet-work [A]. ProceedingsoftheInternationalJointConferenceonNeuralNetworks [C]. WashingtonDC ,1989.593-6O5. United Development Company Beijing vary depending Hui Hui Machinery Co., Ltd,hollister scs. Beijing Electrical Co., Ltd. United Development Corporation is a wholly-owned enterprises in China to set up Beijing high-tech enterprise, specializing in electric-hydraulic hammer (liquid air hammer) technology for a space free steam hammer and hammer forging to transform, to undertake a variety of major tonnage of steam - air free forging and die forging hammer transformation and electro-hydraulic hammer, quickly forging, hydraulic press machine design and manufacture of complete sets of projects to meet national energy-saving and environmentally friendly development requirements. The end of 2000 in Changchun FAW Forging Co., Ltd. and Baoshan Iron & Steel Co., Ltd. in 2005 in a special branch of the electro-hydraulic hammer steel transformation projects, our company with advanced technology,Hollister wien, reliable quality, good service and reasonable prices fell swoop; 2002, and completed the transformation of Changchun FAW hammer the second phase. This indicates that our products in the same industry leading level. Has for the Shougang Group, FAW, Hafei, too, NAC, Baosteel and other steel metallurgy,hollister scs, aviation, automobile manufacturing, shipbuilding, military, oil machinery, mining machinery, heavy machinery and specialized forging enterprise transformation of the three hundred Taiwan hammer. In recent years, more sets of machine hammer to undertake projects, to the end of 2006, users of the machine has delivered more than three units. The hammer is fully capable of a continuous three-shift production to meet the needs of users. To this end, China Machinery and Electronic Daily Company's services: quality first, customer first, service time,hollister, provide users with satisfactory products and services. Address: North Street, Haidian District, Beijing Xizhimen age 45, Block D, 1601,1603 light gardens Postcode: 100044 Tel :010 -62223338 / 9,62218886 Fax :010-62260635, hUp: / / www. beijing-yihui. comE-mail: tec @ beijing-yihui. com, bjyihui @ sohu. net Wuxi Office: Address: Wuxi City,abercrombie, Jiangsu Province Economic Development Zone, Huishan 102 Jin Hui Road Postcode: 214174 Tel :0510 --83,596,685 / 6 Fax :0510-83596689 Topics related articles:        相关的主题文章： music and translated Peter Remove the first child die forging and have made certain benefits

The basic shape of the deep drawing parts common development and application of test equipment Flow, so as to achieve the purpose of regulating the BHF. In this paper, power supply,adidas climacool hose, slide-wire rheostat circuit and multimeter to adjust the composition of the different power values. BHF control system shown in Figure 3. Rainbow w, Jj ∞ Yi Pao DC power management products is busy {H 3 BHF control system diagram is well known, deep drawing process the deformation zone prone to wrinkling phenomenon, currently the most extensive and effective prevention measures is set blank holder. Blank device is reasonable and effective, the key is the size of the blank holder force is appropriate. BHF is too small to resist wrinkling instability trends; BHF is too large,adidas climacool, in vain contributed to a dangerous section of the rupture. Visible BHF deep-drawing process is a very important process parameters. As in the drawing process, wrinkling instability trend is different. In the beginning stages of drawing,adidas climacool chill, the trend of increasing wrinkles, BHF power should be gradually increased since then, the trend of reduced wrinkling instability,adidas la trainer, BHF should be reduced accordingly, we can see almost the ideal platform BHF should be change. To this end, wrinkle-free blank holder force,adidas climacool schuhe, subject to the critical wrinkling conditions, should be to ensure the premise of rough do not wrinkle, select the value as small as possible. However, drawing sheet,adidas neo, the corresponding limits on the investment does not wrinkle deformation is generally small, in this case if a single degree of deformation as a sheet forming limit, you can not truly reflect the limits of plate deformation. To this end, the production of wrinkle preventive measures to stabilize the deformation process to proceed, in order to play the buried plate deformation inherent ability. Therefore, to set the appropriate size of the blank holder force, in order to fully reflect the board's Crossing - Apartments shed for cattle cross ● a salary limit of deformation, the need to pull the material by the deep drawing process of carrying capacity constraints. Towel sheet deep drawing process to ensure its smooth shape is a necessary condition for the maximum drawing force f should be small risk of rupture of the carrying capacity of cross-section,adidas online shop, therefore, determines the maximum allowable value of BHF. As the ultimate bearing capacity by plate material properties, like dangerous broken and nervous stress and deformation effects such as, in general, it is also changing during the forming process, and therefore, the maximum allowed value of BHF forming process in the whole should also be constantly changing. In summary we can see, in the deep drawing process,adidas schuhe, the critical condition of wrinkling and ultimate bearing capacity are necessary to determine the minimum and maximum allowed BHF BHF, and in the deep drawing process are changing. Can be seen, the pressure side of the existing equipment to provide such changes BHF is very difficult. Therefore, the existing devices to achieve BHF and changes in the regulation of exercise for in-depth study of Latin shape the law, is of great significance. This installation of the BHF-conditioning system, you can easily adjust the value of different BHF, which in the deep drawing process for the realization of the changing BHF, so forming conditions become more units to provide a reasonable basis. Fifth, the device operating characteristics of the device die size of the design: the axisymmetric part Dd = 160mm ~ For the most part non-axisymmetric die lip length L = 160mmc Figure 4 Calibration of the current relationship with BHF Figure made on the device resistance strain gauge pasted drawing force and blank holder force sensor operating range is 0 ~ 200kN respectively, and 0 - 250kN. 50 used a type of LVDT displacement sensor operating range of 0 - 100mm. According to the operating characteristics of the electromagnetic proportional pressure relief valve and pressure side of the scope of work force sensor, the device blank holder force is adjustable from 20 ~ 250kN. From the design of the die size point of view, this range of pressure and powerful enough to meet the requirements. Figure 4 shows the calibration of the device and the current value of BHF relationship. Six, the application of this choice of diameters D = 64,96,128 (mm) punch in the device on a drawing test. Test material for the 08AI steel, rough size Dn = 250mm, top cone diameter = D / Dd, deep drawing power of a stroke on the impact of the relationship can be seen in certain BHF, when K more hours, the smaller the required drawing force and drawing to a certain height after the break, this time mainly to bulging deformation when K is large, that is gradually drawing closer to the cylinder-shaped parts, the larger the required drawing force, this time to the main drawing deformation. and from the Figure 5 can be seen, cylindrical parts spare parts easily than conical shape, visible, cylindrical and conical parts there is an intrinsic link between the parts shown in Figure 5 relative to the top cone diameter of the impact force on the drawing shown in Figure 6 a K = 0.6, different BHF BHF deep-drawing power of a stroke on the impact of the relationship can be seen, the greater the blank holder force, required drawing force is also greater. (continued on page 37) 27 相关的主题文章： 2005.1-4\] Lu into water-soluble> 10% fully meet Taiwan QSTTIl5 a pair _ 9 = 16-230 the right combination of punch and die clearance of its single its convex surface

ObjectARX-based finite element systems integration and application of the wheel forming Spoke first contact surface pressure plate and the second upsetting blank, then the central punch and blank contact,adidas online shop, 4 Figure 4 pre-forming mold structure 1. Preformed billet 2. On the forming mold 3. Under the forming die 4. The central charge and the first five. Figure 5 Pre-sizing ring trellis forming process of the metal contact with the mold pressure exerted by the mold with a downward trend. One hub area for the free rigid zone, the material slightly downward movement, speaking out from the downward movement of the whole; and radial plate area materials upsetting role as a significant downward movement, and from the inside outward radial motion increases. This type of free upsetting deformation flow pattern inside the ring until the billet and forming contacts will change. As the billet outer ring contact surface with sizing increases, the resistance increasing constraints. Then spoke apparent shunt zone plate layer,adidas climacool schuhe, the inner layer of material diverted inward movement of the wheel hub area, the outer material then flows to the rim area,adidas climacool chill, which the hub cavity fill appear significant. At the same time, inside the wheel hub area also form a shunt layer, the metal wheels were up and down to the cavity flow. As the metal hub next to the intensity of the flow chamber upward mobility than the strength of many, therefore, the hub cavity is first filled with the next, then the hub cavity filled quickly. Wheel cavity is completely filled, with the continuation of the forming die under the pressure, wheel hub area and spoke quickly to the plate area of ​​the material flow of the rim area. When the upper and lower forming mold is closed, completely filled the cavity rim. From the initial pre-forming the equivalent strain distribution (upsetting the end) curved tunnel violent storm once prosperous blind jie pan crack crack for legacy Li. Figure 6 pre-forming process at the end of the speed vector and the equivalent strain distribution analysis shows that the stress and strain distribution within the workpiece is very uneven, with the increased travel on the forming mold,adidas schuhe, the metal deformation within the workpiece increases,adidas neo, board part of the largest radial deformation, the equivalent strain of 2.85, the metal rim of a small amount of deformation, especially in the outer rim, the other effect becomes 1.26. The analysis of the basic data have been used for actual production, if the strict control of the process step, after forming the shape and size of the wheels can meet the design requirements. Therefore, the calculation results show that the finite element analysis system integrated with high precision and reliability. 3. Upsetting rolling reduction of the impact of pre-filled cavity formed in the wheel of the whole process step forming process occupies an important position. After upsetting the pre-formed blank,adidas climacool, the general shape of the formation of wheel wheel shape,adidas climacool hose, and the rim part of the pre-forming quality will directly affect the shape and size after rolling, this use of the aforementioned integrated finite element analysis system,adidas la trainer, upsetting the main study volume of the cavity is full of pressure effects. In the actual design process conditions, the relative reduction ratio when the simulation were taken 72.3,75.1,78.1 pre-forming step of forming working conditions. It can be seen from Figure 7: When the relative reduction ratio is small, due to enter the pre-forming, the blanks were the first to the rim of the upper and lower cavity flow, and after contact with the inner ring with the sizing, so the first forming the outer rim . In the blank with the rim of the upper and lower chamber have some exposure to H abundance ratio is 78.1 ■ of Ju Figure 7 pre-forming at the end of the speed vector resistance, the metal flow to the inside of the rim. And then a smaller outer diameter blank, blank contact with the outer ring with sizing late, that is free upsetting stage longer. So this is the rim diameter ring of the role of the regional material flow has slowed, and the resulting corner the final stages of rim is difficult to full. The results show that: upsetting the relative rolling reduction of 75 or so, pre-forming is full of the best. V. CONCLUSIONS (1) prepared using VC interface program development based on ObjectARX AutoCAD, to achieve a pre-processing finite element analysis of graphical input and data exchange between modules, and finite element analysis system developed graphical interface. (2) in the VC environment, using WINDOWS process of finite element analysis system to integrate the various modules. (3) heavy plant 840HDS wheels, for example, for upsetting, pre-forming process step simulation, the results were consistent with the site, the level of integration and analysis system accuracy has been verified. (4) analysis of the upsetting rolling reduction of the preformed cavity filled with the impact of process design in the field conditions, upsetting the relative rolling reduction of 75 or so, pre-forming is full of the best. References 1 Wang Fujun, Zhang Zhimin, Zhang Wei. AutoCAD2000 environment C VC + + application development tutorial. Beijing: Beijing Hope Electronic Press, 2000.2 Qi Shu workshops. VisualC + +6.0 application user interface, pre-production example. Beijing: China Water Power Press, 1999.3 Jiansheng, Guohui Guang, Jie Sun first. Rigid-plastic finite element software TFORM2 its application. Taiyuan Heavy Machinery Institute 1997, 18 (3): 255 - 2595 相关的主题文章： c1Step4501andStress-effective blanking a must coat the aperture processing mode than on the larger diameter of the lower die

Forging burr hole punching differential Does not produce punching burr, thus saving work of cleaning up glitches,adidas climacool schuhe, the economic effect is that the fort off the side of the wall i words Du Kui health - poor private school leek j soap / bfj perforated bamboo '0 touch forgings, all with red hole with skin. As the punching slot model with skin forming in forging a greater temperature drop, greater resistance to deformation, so the thickness can not be designed too thin, the minimum thickness was 3ram. Excision with skin punch punching die. In punching, due to the hole and punching die forgings concave touch not completely fit, skin is still in limbo, but when there is a tear in the punching zone, so the bottom of the hole in forging a greater vertical burr. This bore burr, clean up is very difficult, especially the small size of the hole even more irregular, seriously affecting the quality of forging and cost. On the basis of practice in the production, we developed a referred to as In this paper, this method specifically to be addressed. First, the traditional method produces burr punching Analysis conventional punching method shown in Figure 1,adidas la trainer, the lower section in red always have a greater burr, shown in Figure 1A at the enlarged map. Figure 1 shows, punching die is at the cusp of cutting edge, when the punch is easy to crack. Must be designed into a small plane,adidas climacool hose, so as reduced height, forged in the area is in suspended state. Punching deformation will occur when the skin punching, especially more so this is just hot punching burr reasons. . . . +. Burr thickness and height of buildings, mainly due to forging material strength, performance, punching the film thickness,adidas neo, punching die size of the gap between the convex and concave grip, die wear state, as well as forging temperature and other factors. Week 1 class Simulium Kai Rong Si surface tellurium Figure 1 hole punch 2 holes 3} forging die in 4 hole punch skin eleven collapse angle 6 with crack with a bright wide burr burr height E through I ● improve the impact because, although able to restrict to a minimum on the burr, but not cutting out completely in this way gross farming without forging, which always require an additional secondary deburring process. In order to obtain burr-die forging, we test referred to as a A spit up too much time punching punching around the forward section 2 in Figure 1. Hole punch 2. 3 holes forging. Shen} hole punching die a skin thickness of an embossing height and then a second process step, the reverse separation punching. Shown in Figure 3. 18 Figure 3 Reverse-cut application of section separation} 1 hole punch 2. 3 hole punching concave horizontal forging film a one touch 4 punching punching collapse forward angle n. A reverse angle of a forward fall punching punching punching bright light with a reverse punch with a skin thickness seen from Figure 3,adidas climacool, the forward and reverse embossed die-cut separation of punching,adidas climacool chill, cutting height is the differential. Therefore, as shown in Figure 1,3 shows the differential punching,adidas online shop, punching differential surface without tearing off the red zone,adidas schuhe, so no vertical spikes. Therefore, to achieve the purpose of punching without burr. Third, the differential of about punching process, design rules 1. Forward embossing punching punch slider should be adjusted under the dead, so that the next location of dead skin thickness in half of the punching position can also be slightly more, but can not make punching and forging skin separation. General h a f Ji ~ curse j. 2. After punching the reverse isolation of forging punching forward, flip 180. And placed within the die, and then reverse the separation punching, punch the bottom dead center position of the film and punching should be separated to forging. 3. Should pay attention to (1) When the forging parting line shape is symmetric under a forward and reverse punching punching the punching die is the same mold. (2) When the forging parting line shape is asymmetric under the forward and reverse punching punching the punching die can not use the same mold. Because punching is positioned by the shape. In order to ensure the accuracy of positive and negative cutting position, it must design their own special punching die. (3) If it is a continuous multi-station punch. Both positive and negative cutting process step according to the method of continuous punching. Fourth, no burr punching the economic effects of the differential sum. Differential punching the new method can be burr-hole die forging, thus eliminating a lot of deburring workload, especially for small size with irregular hole punching die forgings, it is a kinds of good ways to teach if the economy is obvious. After Yu 相关的主题文章： unless the strain is very large. 3. Whether in high or low temperature zone deformation White pine ratio of 0.3 concave die cavity shape and size