購買設計請充值后下載，，資源目錄下的文件所見即所得，都可以點開預覽，，資料完整，充值下載可得到資源目錄里的所有文件。。?！咀ⅰ浚篸wg后綴為CAD圖紙，doc,docx為WORD文檔，原稿無水印，可編輯。。。具體請見文件預覽，有不明白之處，可咨詢QQ:12401814
Chair support ramming craft analysis and its mold design
Student name:xiong zhi yuan class:0781053
Supervisor:luohaiquan
Abstract: This design topic assigns is some motorcycle chair support, the shapeis simple,
Simultaneously includes falls the material and the curving two workingprocedures, curving relative quite is simple. In this design the essential place is the reasonable choice mold gap,the gap directly affects in the mold design is falling the materialquality, therefore the appropriate gap choice should take the workpiece cross section quality, fall the material precision, the moldlife and the processing quality four items as the basis, and carrieson the suitable classification. Partial key raised lies in, theconcave mold design in the mold design, they all will want theadvanced line of examination mold qualified later in the heattreatment, because it will affect is falling the material will bewhether qualified.
Because this components belong to the mass production, moreover themanufacture precision request is not high, needs the small componentswhich the multi- working procedures flushes. Therefore the cut die hadme to choose the level to enter the mold, in order to could satisfythe manufacture request at the same time also to increase theoperation security and the reduced mold and the equipment quantity,thus reduced the workshop the area. Because myself level is limited, in the present paper inevitably hasmany careless mistakes and the mistake place, asks respectfully tocomment reads teacher to criticize points out mistakes.
Keyword:chongcai gap The level enters the mold Section surface quality
Mold life
Signature of supervisor:
i
外文資料與中文翻譯
外文資料：
Analysis on The Factors of Impacting on The Life of Stamping Die
REN Hai-dong．YU Ling
Abstract：Stamping is a wide range of material processing methods，stamping die is equipment to achieve the important parts of theprocessing，whose life directly afects quality an d cost ofthe product．This article analyzes to its influencing factors，finding a method tosolveproblems，andimprovethelifeof stamping die．
Keywords：Samping die；life；Infl uencing facto
Is the use of stamping presses installed in the die pressure on the material to produce plastic deformation or separation in order to obtain the parts needed for a pressure processing method. In industrial production, especially in household appliances, automotive, aerospace and engineering fields such as instrumentation is widely available. The die is the realization of this important technology components and equipment for processing. Die as a result of a long cycle of production and processing, the use of the high cost of materials, manufacturing costs in product cost of production occupies a significant proportion, therefore, to improve the life of stamping dies is very important. Through the use of molds, for various reasons can not be a reproduction of the red pieces of qualified, could no longer be repaired, which is commonly referred to as die failure. Die life by various forms of limitations expired, common are: wear failure, failure deformation, fracture failure and failure, such as bite wounds. Stamping processes, as well as due to different working conditions of the different effects of stamping die failure are many factors, but the same factors may also bring some form of failure. In this paper, an analysis of its influencing factors, possible solutions to the problem in order to achieve the purpose of die life.
1 Mold Design
Mold design, including structural design and parts design. The structure of mold not only affects the quality of parts produced to determine the productivity of enterprises and processing methods, but also to improve the life of mold also has a key role. Therefore, before designers to make full preparations to meet the production tooling to optimize the structure at the same time.
1.1 Parts of Product Design
Reasonable product design will help improve the life of mold. If the product has a cusp, or fillet radius is too small, the design of the edge will die due to stress concentration and cracking. Without prejudice to the structure and function of products, we can change the design of some of its unreasonable.
1.2 Die Structure Design
Reasonable structure can improve the die life. For example, in Die, the direction to improve the convex and concave stamping die in the course of the relative stability, thus ensuring the mold space at a reasonable framework of blanking blanking. And the reasonableness of blanking clearance and stability to improve die life is an important measure. Accurate reduced-oriented relationship between the relative movement of the wear and tear of parts and components to avoid the convex, concave die as a result of unreasonable gap a "bite injuries" and other forms of failure. Particularly in the Fine Blanking Die, the high-precision mold-oriented institutions is to ensure that the structural design of an important guarantee for success. Therefore in order to improve the life of mold, the form must be the right choice and guide precision-oriented. The choice of orientation should be higher than the accuracy of convex and concave mold with precision. For more blanking punch, punch in a number of large difference in diameter, there is a difference and close the case that if a small and a long punch, then easily lead to instability or break. We can punch arranged in Figure 1 (a) ladder-style in order to increase its stiffness. Punching holes for the need to increase the punch guide in order to enhance the strength of punch, which is to ensure the normal work of stamping dies to the premise. Which can increase many-oriented approach, to be used in Figure 1 (b) shown in the front and the entire process-oriented and other-oriented.
Figure 1 (a) ladder layout punch 1 (b) punch-oriented
Accurate calculation of the process can also increase mold life. Such as discharge power and the calculation of stroke. If we are not allowed to easily spring fatigue fracture or failure. Die on a high degree of calculation, as well as the choice of press and reasonable manner and location-oriented institutions can effectively improve the die life. Modulus of continuity for the design and layout of the ride side of the calculation of size is also crucial.
1.3 Die gap
Stamping dies when space is the convex, concave die size difference between the horizontal edge. Gap on the impact of a large die life is a stamping process and die design of an extremely important issue. Convex, concave die gap size of a direct impact on product quality and mold the life space is too large or too small will cause the edge passivation or wear and tear (as shown in Figure 2). Die materials drop to die later, punch to punch prevail, and these two dimensions has been the impact of space. The experimental results show that the thickness of the gap below 2 percent, prone punch damage, space for more than 6%, there had been errors in parts size. Gap in the thickness of 4% ~ 5%, the effect of blanking good stability. Die gap, therefore the correct choice is to ensure that an important way to die life. At present, the choice of space data in addition to investigations, the most by the actual experience.
(a) gap is too small (b) a reasonable gap (c) gap is too large
Figure 2 gap on the impact of stampings
2 Die Manufacturing
Mold manufacturing process design is reasonable, to ensure that mold is an important way of life. Most of mold manufacturing parts of the process can be carried out in accordance with the normal, but there are special requirements for spare parts or spare parts for local processing, will need to have some special methods.
2.1 Mechanical Rough
Material machining accuracy of the assembly of the mold affects accuracy, it will directly affect the mold of parallelism, perpendicularity and coaxiality. In addition, the marks left rough, worn, are prone to stress concentration sites, but also occurred in the early fatigue cracks and the local.
2.2 Heat Treatment
Heat Treatment in the manufacture of stamping die plays a very important role, in spite of different types and different structure of mold, the use of different steel products, or using different machining and processing of shape, but they need to use heat treatment process to obtain a higher hardness and wear resistance, as well as other mechanical properties required. In general, the die service life and quality of products produced to a large extent depends on the quality of heat treatment processing. Thus, in die manufacturing, and continuously improve the skill level of heat treatment, a reasonable template to improve the performance of internal organization and working methods, it is particularly important. Heat treatment time and temperature is an important factor, because of the time in different temperatures, heat treatment may constitute a different form, the main annealing, normalizing, quenching and tempering, and carburizing, nitriding, carbonitriding, etc.. For example, in the blanking die, because people punch wedge material is the work of more serious wear and tear parts, so the hardness should be greater in general for the HRC 60 ~ 63, die for the HRC 57 ~ 60, this kind of hardness than the two , or die punch hardness is higher than the longer die life.
3 Die Assembly and Debugging
Assembly is the key to mold production process. A direct impact on the quality of the die assembly of the quality of parts, dies and the life of the state of the technology. Die assembly includes two aspects:
(1) good parts of each machining process in accordance with requirements of drawings assembled into a general assembly and assembly;
(2) in the assembly process as part of the processing work. Die in the assembly as an example, the technical requirements is to ensure consistency blanking gap and ensure the accuracy of direction-oriented institutions, as well as the movement to ensure that all relevant pieces of die design in accordance with strict technical parameters. This is a debugging tool to ensure a successful and smooth conduct of the production protection, but also to ensure that an important factor in mold life. In recent years, with the development of the production, users are vulnerable to damage parts of the swap request, so that users die at the scene of the rapid replacement of damaged parts. Die before the test mode, it should also be designed in strict accordance with the technical parameters of the model to select press. It is closely related to the length of die life. Press the stiffness, precision, crucial parameters such as tonnage. Press one of the stiffness of stiffness by the bed, transmission stiffness and rigidity of three parts-oriented, if less stiffness, load and unloading end, the die gap, great changes will happen, it will affect the accuracy of stamping parts and mold life. Die after assembly, must be red and adjust the test can be used for production. In order to protect the mold, the first time in debugging, it is necessary to pay attention to the use of paper or aluminum, as well as cold-rolled plate red test. To ensure that edge punch die edge into the depth of the scope of a reasonable (usually for a material thickness). Stamping die so red when the level of stress and wear and tear will be minimal, and fully protect the convex and concave mold, increased die life. The purpose of debugging and the task is: to die out not only qualified stampings, security and stability but also put into production use. Should be based on examination of stamping defects, analysis of its causes and try to solve them. Some bending, deep drawing and flanging, etc. so that the deformation of sheet metal dies, stamping parts, when the shape of complex or high accuracy, it is difficult to accurately calculate the deformation of the former size and shape of the rough. For this type of stamping parts, although the relevant references are rough calculation methods and formulas, but the impact of plastic deformation as a result of many factors, calculated from the size and needs of different size. In the actual production in order to obtain more accurate size, often determined through experiments. Red in the test set to adjust the size of blank.
4 Conclusion
Stamping die life impact of a number of factors, from the above analysis we can see from the mold design to the use of the entire process can improve the die life. Practice has proved that the rational design of die structure and the shape of the die using the appropriate manufacturing processes, heat treatment process, so that die in the normal conditions, can increase the mold life.
References:
[1] Weng its gold. Cold stamping technology [M]. Beijing: Mechanical Industry Press, 2007.
[2] Liu, ZHANG Bao-zhong. Stamping die design and manufacture of [M]. Beijing: Higher Education Publishing
Agency. 2006.
[3]Xiaopei.wang. Stamping Manual [M]. Beijing: Mechanical Industry Press, 2006.
中文翻譯：
影響沖壓模具壽命的因素分析
任海東，于玲
摘要：沖壓成形是一種應用廣泛的材料加工方法，沖壓模具是實現(xiàn)零件加工的重要工藝裝備，它的使用壽命直接影響到產品的質量和成本。對模具壽命的影響因素加以分析，找出解決問題的方法，從而達到提高模具壽命的目的。
關鍵詞：沖壓模具：壽命；影響因素
沖壓是利用安裝在壓力機上的沖模對材料施加壓力，使其產生分離或塑性變形，從而獲得所需要的零件的一種壓力加工方法。它在工業(yè)生產中，尤其是在家用電器、汽車、航空以及儀器儀表等工程領域獲得廣泛應用。而沖模就是實現(xiàn)這一零件加工的重要工藝裝備。由于模具的生產加工周期長，使用的材料費用高，制造成本在產品生產成本中占有相當大的比例，因此，提高沖壓模具的壽命是非常重要的。模具經過使用，由于種種原因不能再生產出合格的沖件，也不能再修復，這種情況一般稱為模具失效。模具壽命受各種失效形式的限制，常見的有：磨損失效、變形失效、斷裂失效及啃傷失效等。由于沖壓工序不同以及工作條件的不同，影響沖壓模具失效的因素很多，而同一種因素也可能帶來幾種失效形式。本文對其影響因素進行分析，找出解決問題的方法，從而達到提高模具壽命的目的。
1 模具設計
模具設計包括結構設計和零部件設計。模具的結構不僅能影響到所生產零件的質量，決定企業(yè)的生產效率和加工方式，而且對提高模具的使用壽命也具有關鍵的作用。因此設計者在設計之前，要做好充分的準備工作，在滿足生產的同時盡可能優(yōu)化模具結構。
1．1 零件產品設計
合理的產品設計有利于提高模具的壽命。如果產品具有尖角，或圓角半徑太小，所設計的凹模刃口就會因應力集中而開裂。在不影響產品結構和功能的前提下，我們可以改變其一些不合理的設計。
1．2 模具結構設計
合理的結構可以提高模具的壽命。例如在沖裁模中，導向機構提高了凸、凹模在沖壓過程中的相對穩(wěn)定性，從而保證模具在合理的沖裁間隙范圍內進行沖裁。而沖裁間隙的合理性及穩(wěn)定性正是提高模具壽命的重要措施。精確的導向減少了有相對運動關系的零部件的磨損，避免了凸、凹模由于間隙不合理出現(xiàn)“啃傷”等失效形式。尤其在精密沖裁模中，高精度的
導向機構是確保模具結構設計成功的重要保障。因而為了提高模具的壽命，必須正確選擇導向形式和導向精度。導向精度的選擇應高于凸、凹模的配合精度。對于多凸模沖裁，在幾個凸模直徑相差較大，相距又很近的情況下，如果小凸模細小而又較長，則容易造成失穩(wěn)或折斷。我們可以把凸模布置成如圖1(a)階梯式的，以增加其剛度。對于小孔沖裁，必須增加對凸模的導向，以提高凸模的強度，這是保證沖壓模具能正常工作的前提。其中能增加導向的方法很多，可采用如圖1(b)所示的前端導向和全程導向等。
準確的工藝計算也可以提高模具的壽命。如卸料力及行程的計算。若計算不準，容易造成彈簧的疲勞斷裂或失效。對合模高度的計算以及壓力機的選擇，合理的定位方式及導向機構等，都可以有效地提高模具的使用壽命。對于連續(xù)模排樣的設計和搭邊尺寸的計算也至關重要。
1．3 模具間隙
模具間隙是指沖壓時凸、凹模刃口橫向尺寸之差。間隙對模具壽命的影響很大，是沖壓工藝與模具設計中的一個極其重要的問題。凸、凹模間隙的大小直接影響產品的質量和模具的使用壽命，間隙過大或過小都會使刃口鈍化或磨損(如圖2所示)。沖裁模中落料一般以凹模為準，沖孔以凸模為準，而這兩個尺寸又受到間隙的影響。實驗表明，間隙在板厚的2％以下時，凸模容易發(fā)生損壞，間隙在6％以上時，制件尺寸出現(xiàn)誤差。間隙在板厚4％ ～5％時，沖裁穩(wěn)定效果好。因此正確選擇模具間隙，是保證模具壽命的重要途徑。目前，間隙的選擇除了查資料以外，大部分靠實際經驗獲得。
2 模具制造
模具制造工藝設計的合理性，也是保證模具壽命的重要途徑。大部分模具零件的制造可以按正常的工藝進行，但對有特別要求的零件或零件局部加工，就需要有一定特殊的方法。
2．1 機械粗加工
材料的加工精度對模具的裝配精度有很大的影響，將直接影響模具的平行度、垂直度和同軸度。另外，粗加工留下的刀痕、磨痕，都是容易產生應力集中的部位，也是早期產生裂紋和發(fā)生疲勞的地方。
2．2 熱處理
熱處理在沖壓模具的制造中起著很重要的作用，盡管不同類型及不同的結構模具，使用不同的鋼材，或采用不同的機械加工及加工成形，但都需要用熱處理的加工方法，使其獲得較高的硬度和耐磨性，以及其他所要求的力學性能。一般來說，沖模的使用壽命及生產出來的產品質量，在很大程度上取決于熱處理加工質量．因此，在沖模制造中，不斷提高熱處理的技術水平，合理的改進模板內部組織和性能的工作方法，就顯得格外的重要。時間和溫度是熱處理的重要因素，由于時間溫度的不同，可構成不同的熱處理形式，其主要有退火、正火、淬火、回火和滲碳、滲氮、碳氮共滲等。比如在沖裁模中，由于凸模楔人材料，是磨損比較嚴重的工作零件，所以其硬度應大些，一般為HRC 60～63，凹模為HRC 57～60，這樣比兩者硬度樣，或凹模硬度高于凸模的模具壽命更長一些。
3 模具裝配及調試
裝配是模具生產中的關鍵工序。沖模裝配質量直接影響制件的質量、沖模的技術狀態(tài)和使用壽命。沖模的裝配工作包括兩方面的內容：
(1)將每個加工好的零件按圖紙工藝要求裝配成組合件及總體裝配；
(2)在裝配過程中進行的一部分加工工作。以沖裁模的裝配為例，其技術要求是保證沖裁間隙一致性，保證導向機構的導向精度，以及保證各相關運動件能夠按照模具設計的技術參數(shù)嚴格進行。這是保證模具調試成功及生產能夠順利進行的保障，也是確保模具壽命的重要因素。近年來，隨著生產的發(fā)展，用戶對易損壞零件提出了互換要求，以便用戶在現(xiàn)場對模具損壞零件的迅速更換。模具在試模前，還應該嚴格按照設計的技術參數(shù)來選擇壓力機的型號。它關系到模具使用壽命的長短。壓力機的剛度、精度、噸位等參數(shù)至關重要。其中壓力機的剛度是由床身剛度、傳動剛度和導向剛度三部分組成，如果剛度較差，負載終了和卸載時，模具間隙會發(fā)生很大變化，將會影響到沖壓件的精度和模具壽命。模具裝配完后，必須經過試沖和調整，才能進行生產使用。為了保護模具，在第一次調試時，要注意利用紙片或鋁片以及冷軋板進行試沖。保證凸模刃口進入到凹模刃口的深度在合理的范圍內(一般為一個料厚)。這樣模具沖壓時的沖壓力及磨損程度會最小，充分保護了凸、凹模，提高了模具壽命。調試的目的和任務是：使沖模不僅能沖出合格的沖壓件，而且能安全穩(wěn)定的投入生產使用。應根據試沖件中出現(xiàn)的缺陷，分析其產生的原因，設法加以解決。有些彎曲、拉深及翻邊等使板料變形的沖模，當沖壓件的形狀復雜或精度較高時，很難精確計算出變形前的毛坯尺寸和形狀。對于這一類沖壓件，雖然相關參考資料都有計算毛坯的方法和公式，但由于影響塑性變形的因素非常多，計算出來的尺寸和實際的需要尺寸是有差別的。在實際的生產中為了得到較準確的尺寸，往往通過試驗來確定．即在試沖調整中確定毛坯的尺寸。
4 結論
影響沖壓模具壽命的因素很多，從以上分析可以看出從模具設計到使用的全過程中，均能提高模具壽命。實踐證明，合理設計模具結構及形狀，采用恰當?shù)臎_模制造工藝、熱處理工藝，使模具在正常的條件下工作，均能提高模具的壽命。
參考文獻：
[1]翁其金．冷沖壓技術[M]．北京：機械工業(yè)出版社，2007．
[2]劉建超，張寶忠．沖壓模具設計與制造[M]．北京：高等教育出版
社。2006．
[3]王孝培．沖壓手冊[M]．北京：機械工業(yè)出版社，2006．
14