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山东汽车冲压模具怎么维修

来源:    发布时间:2019-04-26 13:22:42    点击:

  模具修理:
  Die repair:
  模具的修理指的是模具在不能满足预定的使用要求或制件不能满足质量要求的情况下对模进行的修复工作。此项工作由模具修理工完成。以下就几种模具常见的故障的修理方法及要求进行说明。
  Mould repair refers to the repair of the die when the die can not meet the predetermined use requirements or the parts can not meet the quality requirements. This work is done by the die repairman. The repairing methods and requirements for common faults of several dies are described below.
  A、刀口崩刃:
  A. Blade breaking:
  山东模具在使用中由于各种原因引起的崩刃,都会对制件的质量产生一定的影响。它是模具修理中比较常见的修理内容之一,对刀口的崩刃修理步骤如下:
  The blade collapse caused by various reasons in the use of Shandong moulds will have a certain impact on the quality of the parts. It is one of the most common repairing contents in die repairing. The steps of repairing tool edge collapse are as follows:
  1.根据崩刃的情况,如果崩刃很小时,通常要将崩刃处用砂轮机磨大些,以保证焊接牢固,不易再次崩刃;2.用相应的焊条进行焊接,目前我们采用的是D332焊条来对刃口进行堆焊。堆焊之前一定要选好修理的基准面,包括间隙面和非间隙面;3.将刃口的非间隙面修平(参考事先留下的基准);4.对照过渡件进行划线,如果没有过渡件可以用事先留下的基准进行粗磨间隙面;5.上机台对间隙面进行修配,可借助粘土等辅助研配。在修配过程中一定要小心,开动压力机时尽量慢,必要时用装模高度调整向下开,以避免刀口啃坏的现象发生;6.刀口间隙要合理,对于钢板冲压模,单边刀口间隙取板料厚度的1/20。但在实际操作过程中,可以用板料试冲的办法来检验间隙的大小,只要剪切后制件的毛刺达到要求即可,一般情况下,毛刺大小的判定标准是,毛刺高度不大于板料厚度的1/10;7.检测刀口的间隙面是否与剪切的方向统一;8.间隙配好后,用油石将刀口的间隙面推光滑,以减小生产中板料与刀口的磨擦及废料下落的阻力。
  1. According to the situation of the avalanche, if the avalanche is very small, the avalanche should be grinded by a grinding wheel to ensure that the welding is firm and the avalanche is not easy to occur again. 2. The corresponding electrode is used for welding. At present, D332 electrode is used for surfacing the edge. Before surfacing, it is necessary to select the repair datum surface, including gap surface and non-gap surface; 3. smoothing the non-gap surface of the edge (refer to the datum left beforehand); 4. marking the transition part, if there is no transition part, rough grinding the gap surface with the datum left beforehand; 5. repairing the gap surface with the help of clay and other auxiliary grinding. In the process of repair, care must be taken to start the press as slowly as possible, and adjust the height of the die downward when necessary, so as to avoid the phenomenon of knife-edge gnawing; 6. Knife-edge clearance should be reasonable, for the steel plate stamping die, one-sided knife-edge clearance takes one-twentieth of the thickness of the sheet metal. But in the actual operation process, we can use the method of plate punching to check the gap size, as long as the burr of the cut part meets the requirements. Generally, the criterion for determining the burr size is that the burr height is not more than 1/10 of the thickness of the sheet metal; 7. Whether the gap surface of the cutting edge is consistent with the direction of the cutting; 8. When the gap is matched, the gap surface of the cutting edge is pushed smooth by oil stone. Slip to reduce friction between plate and knife edge and resistance of waste falling in production.
  B、毛刺:
  B. Burrs:
  制件在修边、冲孔和落料时易出现毛刺过大的现象,产生毛刺的原因主要为模具刃口间隙大和刃口间隙小两类:
  When trimming, punching and blanking, the burr of parts is too large. The main reasons for burr are large clearance of die edge and small clearance of blade edge.
  间隙大时:断面光亮带很小或基本上看不见,毛刺的特点为厚而大,不易除去;间隙小时:断面出现两光亮带,由于间隙小,其毛刺的特点为高而薄。
  When the clearance is large, the bright band of the section is very small or basically invisible, and the burr is characterized by thick and large burr, which is difficult to remove; when the clearance is small, there are two bright bands in the section. Because of the small clearance, the burr is characterized by high and thin burr.
  间隙大时的修理方法:
  Repair methods for large clearance:
  1.修边和冲孔工序采用凸模不动而修整凹模的办法,而落料工序时则以凹模为基准,即凹模尺寸不变,通过修整凸模的办法。以上的区别是为了保证产品尺寸不在修理前后受影响;2.对着制件找出模具刃口间隙大的部位;3.用相应的焊条(D332)对此部位进行补焊,以保证模具刃口的硬度;4.修配刀口间隙(其方法与刀口崩刃的方法相同)。
  1. In trimming and piercing process, the punch is fixed and the die is trimmed, while in blanking process, the die is used as the reference, that is, the die size is unchanged, and the punch is trimmed. The above differences are to ensure that the size of the product is not affected before and after repair; 2. Find out the parts with large clearance at the edge of the die; 3. Repair the parts with corresponding welding rods (D332) to ensure the hardness of the die edge; 4. Repair the clearance of the tool edge (the method is the same as the method of tool edge collapse).
  间隙小时的修理方法:
  Repair method for gap hour:
  1.具体的情况依据模具间隙的大小进行调整,以保证间隙的合理。对于修边冲孔模而言,采用间隙放在凹模的办法,而对于落料模而言就应采用放大凸模的办法,从而保证零件的尺寸在修理前后不变;2.修理完成后,要测量其间隙面的垂直,并用板件试刀口间隙是否达到合理的要求。
                                      山东模具
  1. Specific conditions are adjusted according to the size of die clearance to ensure that the clearance is reasonable. For trimming punching die, the gap is placed in the concave die, while for blanking die, the method of enlarging the punch should be adopted to ensure that the dimension of the part remains unchanged before and after repair. 2. After repair, the vertical of the gap surface should be measured, and whether the clearance of the cutting edge of the plate can meet the reasonable requirements.
  对于冲孔模,其产生毛刺后,如果是凸模或凹模磨损,可以找相应的标准件进行更换,如果没有标准件,可以采用补焊或测绘进行制造。另外,特别指出一点,对于合金钢材料等焊接性能较差的材料,要进行特殊处理后再进行焊接,如:预热等,否则会引起模具的开裂。
  For punching die, if the punch or die is worn out after burring, the corresponding standard parts can be replaced. If there is no standard parts, it can be manufactured by repair welding or surveying. In addition, it is especially pointed out that for the materials with poor welding performance such as alloy steel, special treatment should be carried out before welding, such as preheating, otherwise the die will crack.
  C、拉毛:
  C. Grooming:
  拉毛主要发生在拉延、成型和翻边等工序。
  Drawing mainly occurs in drawing, forming and flanging processes.
  解决方法:1.首先对照制件找出模具的相应拉毛的位置;2.用油石将模具相应的位置推顺,注意圆角的大小统一;3.用细砂纸将模具推顺部位进行抛光,砂纸在400号以上。
  Solutions: 1. Find out the corresponding position of the die according to the parts; 2. Push the corresponding position of the die with the oil stone, and pay attention to the size of the rounded corners; 3. Polish the pushing part of the die with fine sand paper, and the sand paper is over 400.
  D、修边和冲孔带料:
  D. trimming and punching tapes:
  修边和冲孔带料产生的主要原因为:修边或冲孔时模具的压料或卸料装置出现异常。
  The main reasons for edge trimming and punching strip material are: abnormal pressure or discharge device of die during edge trimming or punching.
  解决方法:1.根据制件带的部位找出模具的相应部位;2.检查模具压卸料板是否存在异常;3.对压料板相应部位进行补焊;4.结合制件将焊补部位进行修顺,具体的型面与工序件配制;5.试冲;6.如果检查并非模具压卸料板的问题,可以检查模具的刀块是否有拉毛现象。
  Solutions: 1. Find out the corresponding parts of the die according to the parts of the strip; 2. Check whether there is abnormality in the die press-unload plate; 3. Repair welding the corresponding parts of the press-unload plate; 4. Combine the parts to repair the welding parts, and make the specific surface and process parts; 5. Trial punching; 6. If the inspection is not the problem of the die press-unload plate, check whether the knife block of the die has the brushing phenomenon. 。
 
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