Bending machine structure designingWith bending machine control system development, its function more and morecomplete, operating more and more convenient. Although with numerical control system for the control system of bending machine production efficiency, and will be high quality also is very good, but these for copper platoon and LvPai bend it, the consumption of cost is higher, solid we take the common design structure, using hydraulic control system. Such not only can satisfy the production conditions also can save money. The knee bend machine-packed includes the support, the work table and the clamp board, the work table puts on the support, the work table by the foundation and the clamp constitution, the foundation is connected through the hinge and the clamp board, the foundation by the place shell, the coil and the lap is composed, the coil puts in the place shell hollowly, the hollow crown duplicate has the lap. When use by wire to coil circular telegram, after the circular telegram, has the attraction to the clamp, thus realizes to between the clamp and the foundation the thin steel plate clamp. Because has used the electromagnetic force clamp, causes the clamp to be possible to make many kinds of work piece requests, moreover may to have the sidewall work piece to carry on the processing, in the operation is also very simple. Anticipated customer before payment, should better flexure variable which, components aspects and so on bevelling radius from machine's final use, the known machine possibly occurs consider carefully first buys anything. workpiece The first one is worth considering important item is your production parts, the main point is buying a can finish machining task and workbench shortest, the minimum number of machines. Consider carefully material and the largest machining grades thickness and length. If a majority of work is thickness gauge, maximum length 16 10 inches of low carbon steel, so free bending force not greater than 50 tons. However, if engaged in a lot of bottom of dies.the forming, may be considered a 150 tonnage of machine tools. Ok, assuming the thickest material is 1/4 inch, 10 feet free bending need 165 tons, bottom dies.the bending (adjusted bending) will need at least 600 tons. If a majority of workpiece is 5 feet or shorter, number almost halve, which will greatly reduce the acquisition cost. Parts to determine the length of new machines specification is quite important. Flinch change In the same load, 10 feet machine table and the slider appear nao variable is 5 feet machine 4 times. This means that shorter machines need less gaskets adjustment, can produce qualified parts. Reduce gaskets adjusting preparation time shortened again. Materials brand is also a key factor. Compared with low carbon steel, stainless steel need load usually adds about 50 percent, while most of the brand of soft aluminum reduce 50%. You can always from bending machine manufacturers get machine tons, this table shows in decimal different thickness and different materials under each foot length required number estimation. Parts of the bending radius Using free warped, bending radius is concave die from the mouth 0.156 times. In a free bending process, dies.the openings from should be metal material thickness of eight times. For example, using 1/2 inch opening from forming 16 gauge, low-carbon steel parts bending radius about 0.078 inches. If the bending radius nearly small to material thickness shall be bottom of dies.the forming. However, a bottom concave die forming equal pressure than free bending big 4 times the left and right sides. If less than bending radius material thickness, should be used in front-end fillet radius of less than material thickness of the punch, and turn to embossing bending method. So, need 10 times in liberty bending stress. Free bends, convex molding and according to 85 ° dies.the or less than 85 ° processing (smaller as well). Using this group of mould, notice the punch and concave die in stroke at the bottom of the gap, and cover springback and make the materials about 90 ° to keep excessive flex. Usually, free bending die in new bending machine produces the springback Angle acuities 2 °, bending radius equal distance of dies.the openings 0.156 times. For a bottom dies.the bend, mould Angle general for 86 ~ 90 °. In the end, the concavo-convex trip mode between due a slightly higher than the material thickness clearance. Forming Angle to improve, because the number of dies.the bottom bend large (about four times for freedom bending), reduce the bending radius range usually cause rebound of stress. Stamped with a bottom bend dies.the same, just to bend the punch the front-end processing became need bending radius, and stroke bottom clearances between less than material thickness. Due to exert enough pressure (about ten times) free bending force of the punch front-end contact materials, basically avoided rebound. In order to select the lowest number specifications, preferably for greater than material thickness of bending radius to plan, and as far as possible using free bending method. Bending radius is bigger, often do not affect the quality of into pieces and its future use. precision Bending accuracy requirement is a requires careful consideration; it is this factors, decision you need to consider a CNC bending machine or manual control bending machine. If bending accuracy + 1 ° and cannot be changed, you must focus on CNC machine. CNC bending machine slider repeat precision is + 0.0004 inches, forming the precise angular must adopt such accuracy and good mold. Manual control bending machine slider repeat precision for + 0.002 inches long, and in adopting appropriate mold conditions will typically produce + 2 ~ 3 ° deviation. In addition, CNC bending machine for quick pack mould ready, when you require bending many small batch spare parts, it is one of the unquestionable consider reason. mould Even though you have full shelf, do not assume that these mould moulds suitable for bought a new machine. Must be checked every one mold to wear, the method is to measure the punch front-end to Taiwan shoulder length and dies.the Taiwan shoulder length between. For general mold, each feet deviation should be in hospital 0.001 inches, and total length deviation is not more than + 0.005 inches. As for jingmo mould, each feet accuracy should be + 0.0004 inches, must not be more than the total precision CNC 0.002 inches. The best jingmo mould in CNC bending machine, the conventional mould used to manually bending machine. Bending parts of side Hypothesis along one 5 x 10 feet of 10-90 ° gauge low-carbon steel plate bend, bending machine probably must exert extra pressure plate 7.5 tons top up, and the operator must for 280 pounds of straight edge whereabouts prepared. Make the parts may need several strong workers even a crane. Bending machine operator often require bending the long side parts, but realize their work how difficult. Now there is a torsten feeder suitable for engaged in this kind of work workshop, the device can be according to new and old machine needs to improve. Use this device, forming long side parts just one operator. For bending machines provide CNC system, hydraulic systems, and grating ruler, servo motor etc fittings of many foreign companies are actively competing for the Chinese market, for the rapidly improve the level of our country bending machine provides favorable conditions. Some foreign bending machine company is also China seek technical cooperation, joint venture for production, also provides us with the opportunity. Therefore, facing the challenge and opportunity, difficulties and favorable conditions coexist situation, we must seize the opportunities and meet the challenges, rapidly improve play and develop our own bending machine technology level.折彎機(jī)的結(jié)構(gòu)設(shè)計(jì)隨著折彎機(jī)控制系統(tǒng)的發(fā)展，它的功能越來越齊全，操作越來越方便。雖然以數(shù)控系統(tǒng)為控制系統(tǒng)的折彎機(jī)生產(chǎn)效率會(huì)很高，而且質(zhì)量也非常好，但這些對(duì)于銅排和鋁排的彎曲來說，消耗的成本較高，固我們采取常用的設(shè)計(jì)結(jié)構(gòu)，使用液壓控制系統(tǒng)。這樣不但能滿足生產(chǎn)條件還能節(jié)省資金。折彎機(jī)包括支架、工作臺(tái)和夾緊板，工作臺(tái)置于支架上，工作臺(tái)由底座和壓板構(gòu)成，底座通過鉸鏈與夾緊板相連，底座由座殼、線圈和蓋板組成，線圈置于座殼的凹陷內(nèi)，凹陷頂部覆有蓋板。使用時(shí)由導(dǎo)線對(duì)線圈通電，通電后對(duì)壓板產(chǎn)生引力，從而實(shí)現(xiàn)對(duì)壓板和底座之間薄板的夾持。由于采用了電磁力夾持，使得壓板可以做成多種工件要求，而且可對(duì)有側(cè)壁的工件進(jìn)行加工，操作上也十分簡便。預(yù)期的買主在付款之前，最好先從機(jī)器的最終用途、已知機(jī)器可能發(fā)生的撓變量、零件的彎曲半徑等方面仔細(xì)考慮買什么。工件第一個(gè)值得考慮的重要事項(xiàng)是您要生產(chǎn)的零件，要點(diǎn)是購買一臺(tái)能夠完成加工任務(wù)而工作臺(tái)最短、噸數(shù)最小的機(jī)器。仔細(xì)考慮材料牌號(hào)以及最大加工厚度和長度。如果大部分工作是厚度 16 gauge、最大長度 10 英尺的低碳鋼，那么自由彎曲力不必大于 50 噸。不過，若是從事大量的有底凹模成形,也許應(yīng)該考慮一臺(tái) 150 噸位的機(jī)床。好了，假定最厚的材料是 1/4 英寸，10 英尺自由彎曲需要 165 噸，而有底凹模彎曲（校正彎曲）至少需要 600 噸。如果大部分工件是 5 英尺或更短一些，噸數(shù)差不多減半，從而大大降低購置成本。零件長度對(duì)確定新機(jī)器的規(guī)格是相當(dāng)重要的。撓變?cè)谙嗤妮d荷下，10 英尺機(jī)工作臺(tái)和滑塊出現(xiàn)的撓變是 5 英尺機(jī)的 4 倍。這就是說，較短的機(jī)器需要較少的墊片調(diào)整，就能生產(chǎn)出合格的零件。減少墊片調(diào)整又縮短了準(zhǔn)備時(shí)間。材料牌號(hào)也是一個(gè)關(guān)鍵因素。與低碳鋼相比，不銹鋼需要的載荷通常增加 50%左右，而大多數(shù)牌號(hào)的軟鋁減少 50%左右。您隨時(shí)可以從折彎機(jī)廠商那里得到機(jī)器的噸數(shù)表，該表顯示在不同厚度、不同材料下每英尺長度所需要的噸數(shù)估算。零件的彎曲半徑采用自由彎曲時(shí)，彎曲半徑為凹模開口距的 0.156 倍。 在自由彎曲過程中，凹模開口距應(yīng)是金屬材料厚度的 8 倍。例如，使用 1/2 英寸的開口距成形 16 gauge 低碳鋼時(shí)，零件的彎曲半徑約 0.078 英寸。若彎曲半徑差不多小到材料厚度，須進(jìn)行有底凹模成形。不過，有底凹模成形所需的壓力比自由彎曲大 4 倍左右。如果彎曲半徑小于材料厚度，須采用前端圓角半徑小于材料厚度的凸模，并求助于壓印彎曲法。這樣，就需要 10 倍于自由彎曲的壓力。就自由彎曲而言，凸模和凹模按 85°或小于 85°加工（小點(diǎn)兒為好）。采用這組模具時(shí)，注意凸模與凹模在沖程底端的空隙，以及足以補(bǔ)償回彈而使材料保持 90°左右的過度彎曲。通常，自由彎曲模在新折彎機(jī)上產(chǎn)生的回彈角≤2°，彎曲半徑等于凹模開口距的0.156 倍。對(duì)于有底凹模彎曲，模具角度一般為 86 ～ 90°。在行程的底端，凸凹模之間應(yīng)有一個(gè)略大于材料厚度的間隙。成形角度得以改善，因?yàn)橛械装寄澢膰崝?shù)較大（約為自由彎曲的 4 倍），減小了彎曲半徑范圍內(nèi)通常引起回彈的應(yīng)力。壓印彎曲與有底凹模彎曲相同，只不過把凸模的前端加工成了需要的彎曲半徑，而且沖程底端的凸凹模間隙小于材料厚度。由于施加足夠的壓力（大約是自由彎曲的 10 倍）迫使凸模前端接觸材料，基本上避免了回彈。為了選擇最低的噸數(shù)規(guī)格，最好為大于材料厚度的彎曲半徑作打算，并盡可能地采用自由彎曲法。彎曲半徑較大時(shí)，常常不影響成件的質(zhì)量及其今后的使用。精度彎曲精度要求是一個(gè)需要慎重考慮的因素，正是這個(gè)因素，決定了您需要考慮一臺(tái)CNC 折彎機(jī)還是手控折彎機(jī)。如果彎曲精度要求±1°而且不能變，您必須著眼于 CNC 機(jī)。CNC 折彎機(jī)滑塊重復(fù)精度是±0.0004 英寸，成形精確的角度須采用這樣的精度和良好的模具。手控折彎機(jī)滑塊重復(fù)精度為±0.002 英寸，而且在采用合適的模具的條件下一般會(huì)產(chǎn)生±2～3°的偏差。此外，CNC 折彎機(jī)為快速裝模作好準(zhǔn)備，當(dāng)您需要彎制許多小批量零件時(shí)，這是一個(gè)不容置疑的考慮理由。模具即使您有滿架子的模具，勿以為這些模具適合于新買的機(jī)器。必須檢查每件模具的磨損，方法是測(cè)量凸模前端至臺(tái)肩的長度和凹模臺(tái)肩之間的長度。對(duì)于常規(guī)模具，每英尺偏差應(yīng)在±0.001 英寸左右，而且總長度偏差不大于±0.005英寸。至于精磨模具，每英尺精度應(yīng)該是±0.0004 英寸，總精度不得大于±0.002 英寸。最好把精磨模具用于 CNC 折彎機(jī)，常規(guī)模具用于手動(dòng)折彎機(jī)。彎曲件邊長假設(shè)沿著一張 5×10 英尺的 10-gauge 低碳鋼板彎曲 90°，折彎機(jī)大概必須額外施加7.5 噸壓力把鋼板頂起來，而操作者必須為 280 磅重的直邊下落作好準(zhǔn)備。制造該零件可能需要好幾個(gè)身強(qiáng)力壯的工人甚至一臺(tái)起重機(jī)。折彎機(jī)操作者經(jīng)常需要彎制長邊零件，卻意識(shí)不到他們的工作有多么費(fèi)勁?，F(xiàn)在有一種托料裝置適合于從事這種工作的車間，這種裝置可以根據(jù)新老機(jī)器的需要加以改進(jìn)。利用該裝置，成形長邊零件只需一人操作。為折彎機(jī)提供數(shù)控系統(tǒng)、液壓系統(tǒng)，以及光柵尺、伺服電機(jī)等配套件的許多外國公司也正在積極爭奪中國市場(chǎng)，為迅速提高我國折彎機(jī)的水平提供了有利條件。一些外國折彎機(jī)公司也正在中國謀求技術(shù)合作、合資生產(chǎn)，也為我們提供了機(jī)遇。因此，面對(duì)這一挑戰(zhàn)與機(jī)遇、困難與有利條件并存的局面，我們必須抓住機(jī)遇，迎接打挑戰(zhàn)，迅速提高和發(fā)展我國自己的折彎機(jī)技術(shù)水平。