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沖壓模具在制作時容易出現的問題

刮刮乐2000 www.yfrmbf.com.cn 來源:    發布時間:2019-04-02 13:33:36    點擊:

  沖壓是大批量零件成型生產實用工藝之一。在沖壓生產過程中,模具出現的問題比較多,它是整個沖壓生產要素中比較重要的因素。直接影響到生產效率和成本。影響到產品的交貨周期。模具問題主要集中在模具損壞、產品質量缺陷和模具的刃磨方面,它們長期困擾著行業生產。只有正確處理這幾個關鍵點。沖壓生產才能夠順利進行
  Stamping is one of the practical processes for mass parts forming. In the process of stamping production, the problem of die is the most, which is the most important factor in the whole stamping production factor. It directly affects the production efficiency and cost. Affects the product delivery cycle.  Die problems mainly focus on die damage, product quality defects and die grinding, which have long plagued industry production. Only by correctly handling these key points. Stamping production can proceed smoothly
  1 模具故障
  1 Die Failure
  模具故障是沖壓生產中比較容易出現的問題,常常造成停產,影響產品生產周期。因此,必須盡快找到模具故障原因,合理維修。
  Die failure is the most common problem in stamping production, which often causes shutdown and affects product production cycle. Therefore, it is necessary to find out the cause of die failure as soon as possible and maintain it reasonably.
  模具損壞是指模具開裂、折斷、漲開等,處理模具損壞問題,必須從模具的設計、制造工藝和模具使用方面尋找原因。
  Die damage refers to the cracking, breaking and opening of the die. In order to deal with the problem of die damage, it is necessary to find out the reasons from the design, manufacturing process and use of the die.
  首先要審核模具的制造材料是否合適,相對應的熱處埋工藝是否合理。通常,模具材料的熱處理工藝對其影響很大。如果模具的淬火溫度過高,淬火方法和時間不合理,以及回火次數和溫度、肘間選擇不當,都會導致模具進入沖壓生產后損壞。落料孔尺寸或深度設計不夠,容易使槽孔阻塞,造成落料板損壞。彈簧力設計太小或等高套不等高,會使彈簧斷裂、落料板傾斜.造成重疊沖打,損壞零件。沖頭固定不當或螺絲強度不夠.會導致沖頭掉落或折斷。
  First of all, it is necessary to check whether the manufacturing material of the die is suitable and whether the corresponding burying process of hot spot is reasonable. Usually, the heat treatment process of die material has a great influence on it. If the quenching temperature of the die is too high, the quenching method and time are unreasonable, and the tempering times and temperature, elbow selection are not appropriate, the die will be damaged after entering the stamping production. The size or depth of blanking hole is not enough to block the groove hole and cause the damage of blanking plate.  The spring force design is too small or the equal height sleeve is unequal, which will cause the spring to break and the blanking plate to tilt. It will cause overlapping punching and damage parts. If the punch is not fixed properly or the screw is not strong enough, it will cause the punch to fall off or break.
  2 制件質量缺陷
  2. Quality Defects of Parts
  比較常見的制件質量缺陷是產品尺寸超差。只有少數產品存在表面質量問題。
  The most common part quality defect is product size oversize. Only a few products have surface quality problems.
  尺寸超差是沖壓制件的嚴重缺陷。對此,首先要檢查、核對模具的設計,排除設計和制造的原因。如果超差尺寸和材料厚度有關,應檢測沖壓材料的厚度和材質、硬度。
  Dimension overshoot is a serious defect of stamping parts. In this regard, first of all, the design of the die should be checked and checked, and the reasons for the design and manufacture should be excluded. If the excess size is related to the thickness of the material, the thickness, material quality and hardness of the stamping material should be tested.
  沖壓生產過程中引起尺寸超差,主要是模具的磨損、定位導向不良和制件產生變形。模具的刃口磨耗.會造成毛刺太大或切外形尺寸變大、沖孔變小、平面度超差,應該刃磨或更換模具。模具人雜志微信,值得觀注!定位導向不良包括沒有導向、導銷或其他定位裝置沒有起作用,送料機沒有放松,定位塊磨損使送距過長,導料板長度不對或導料間隙太大等。制件在生產中變形,主要有撞擊變形,例如制品的吹出氣壓太強或重力落下撞擊太大變形:出料時受擠壓或括傷變形,應及時清理出料位置或加大出料空間:頂出不當變形。例如頂料銷配制不當、彈簧力不適當或頂出過長,應調整彈力或改變位置或銷數量;下料變形。部份彎曲件不能容許料重疊,須每次落下,當出現碟形應變時可采用壓力墊消除;沖剪變形,主要是材料扭曲不平。尺寸增大或中心不對稱;浮屑擠壓變形,是由于廢料上浮或細屑留在模面上或異物等擠壓變形。
  Over-tolerance in stamping process is mainly caused by wear of die, poor orientation and deformation of parts. The abrasion of the edge of the die will result in too large burr or bigger size of the cut profile, smaller punch hole, and flatness exceeding tolerance. The die should be sharpened or replaced. Mold Man Magazine Wechat Professional, worthy of attention! Poor orientation includes no orientation, no guide pin or other positioning device, no loosening of feeder, excessive distance due to wear of positioning block, incorrect length of guide plate or excessive gap between guides, etc.  Deformation of parts in production mainly includes impact deformation, for example, the blow-out pressure of products is too strong or the impact of gravity falls too large deformation: when the material is discharged by extrusion or bracket deformation, the position of discharging material should be cleared in time or the space of discharging material should be enlarged: the improper deformation of ejection. For example, if the ejector pin is not properly prepared, the spring force is inappropriate or the ejector is too long, the elasticity should be adjusted or the position or number of pins should be changed; the blanking deformation should be achieved. Partial bending parts can not allow overlapping of materials, they must be dropped every time. Pressure cushion can be used to eliminate the dish strain; punching and shearing deformation, mainly the material distortion is uneven. Dimension enlargement or center asymmetry; floating chip extrusion deformation is caused by scrap floating or fine chip remaining on the die surface or foreign body extrusion deformation.
  表面質量不合格
  Surface quality is not up to standard
  沖壓制件的表面質量問題,主要是毛刺過大。造成制件毛刺過大的原因,首先是模具刃口的磨損,應重新研磨模具(下述),確保刃口鋒利。 3 模具的刃磨
  The surface quality problems of stamping parts are mainly excessive burrs. The reason for the excessive burr is the wear of the die edge. The die should be re-grinded (as follows) to ensure that the edge is sharp. 3. Grinding of Dies
  沖壓生產中對模具進行合理的刃磨??梢雜行У靨岣叱迥5氖倜?,節省模具費用,大幅度降低產品成本。
  In stamping production, the die should be grinded reasonably. It can effectively improve the life of the die, save the cost of the die and greatly reduce the cost of the product.
                           山東模具
  當沖模刃口磨損到一定程度時,原本鋒利的刃口變鈍了,會造成沖裁件毛刺過大,尺寸與形位精度下降。因此,模具必須進行刃磨,以恢復其鋒利的沖裁刃口。減小沖裁毛刺和尺寸與形位偏差,改善成形件表面質量。如果不及時刃磨模具,會因為拖延刃磨時間,使得已經磨鈍的刃口遭受堅硬、過大、過厚毛刺的劇烈摩擦,形成模具惡性循環的過度磨損,導致要以幾倍的刃磨量才能夠使刃口恢復鋒利,大大縮短模具的壽命。當制件的毛刺即將超出允許毛刺高度時,應立即停止生產,對模具進行刃磨。
  When the cutting edge of the die is worn to a certain extent, the original sharp edge becomes blunt, which will cause the burr of the blanking part to be too large and the precision of size and shape and position to be reduced.  Therefore, the die must be grinded to restore its sharp cutting edge. Reduce the punching burr and the deviation between size and shape, improve the surface quality of the formed parts. If the die is not grinded in time, the blunt edge will suffer severe friction of hard, large and thick burrs because of delaying the grinding time, resulting in excessive wear and tear of the vicious circle of the die, which will lead to several times of the grinding amount to restore the sharp edge and greatly shorten the life of the die. When the burr of the part is about to exceed the allowable burr height, the production should be stopped immediately and the die should be sharpened.
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