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如何解决铝板加工中变形的问题

来源:http://www.jndclyyxgs.com  发布时间:2021-05-31 16:33:00  

针对铝合金板生产加工中变形的难题,依据原材料样子、加工的剩余量、生产加工方式的不一样,变形的难题会不一样。要想处理这个问题,就须寻找造成变形的来源于。大概有三种:内用劲、温度、内应力与温度相互結果。
In view of the problem of deformation in the production and processing of aluminum alloy plate, the problem of deformation will be different according to the appearance of raw materials, processing surplus and production and processing methods. To deal with this problem, it is necessary to find the source of deformation. There are three kinds: internal force, temperature, internal stress and temperature.
铝合金型材工件切削变形的缘故:
The reason of cutting deformation of aluminum alloy profile workpiece is as follows:
铝合金型材零件变形的缘故许多,与材料、零件样子、加工工艺标准、切削油的特性等都是有关联。关键有下列好多个层面:毛胚内应力造成的变形,切削力、切削热造成的变形,夹持力造成的变形。
There are many reasons for the deformation of aluminum alloy profile parts, which are related to the material, part appearance, processing technology standard and the characteristics of cutting oil. The key points are as follows: deformation caused by internal stress of hair embryo, deformation caused by cutting force and cutting heat, deformation caused by clamping force.


降低工件变形的加工工艺对策:
The processing countermeasures to reduce the deformation of workpiece are as follows
1、减少毛胚的内应力
1. Reduce the internal stress of hair embryo
选用时效性及其震动解决或事先加工工艺均可一部分清 除毛胚的内应力,容量大的毛胚工件故变形也大。若事先除掉毛胚的不必要一部分变小各一部分的容量,不但能够降低之后工艺流程的变形,并且置放一段时间,还能够释放出来一部分内应力。
The internal stress can be partly removed by using aging and vibration solution or pre-processing technology, and the deformation of the workpiece with large capacity is also large. If the unnecessary part of the hair embryo is removed in advance and the capacity of each part is reduced, not only the deformation of the later process can be reduced, but also the internal stress can be released after a period of time.
2、有用挑选刀 具几何图形主要参数
2. Main parameters of useful tool geometry
前角:在维持刃口抗压强度的标准下前角适度挑选大一些,一方面能够打磨锐利的刀口,此外能够降低切削变形使铣面圆 满,从而减少切削力和切削温度。
Rake angle: under the standard of maintaining the compressive strength of the cutting edge, the rake angle should be appropriately larger. On the one hand, it can grind the sharp edge, and in addition, it can reduce the cutting deformation to make the milling surface complete, thus reducing the cutting force and cutting temperature.
后角:后角尺寸对后刃口损坏及工艺性能有立即的危害。粗铣时因为切削速度大、切削负载重、热值大,规定刀 具热管散热标准好,因而后角应挑选小一些。精铣时规定刀口锐利,后刃口与表层的磨擦减少延展性变形,因而后角应挑选大一些。
Back angle: the size of back angle has immediate harm to the damage of back edge and process performance. In rough milling, because of the high cutting speed, heavy cutting load and high calorific value, it is required that the heat dissipation standard of tool heat pipe is good, so the back angle should be selected smaller. In finish milling, the blade should be sharp, and the friction between the back edge and the surface can reduce the ductility deformation, so the back angle should be larger.
螺旋角:为使切削稳定减少切削力,螺旋角应尽量挑选大一些。
Helix angle: in order to make the cutting stable and reduce the cutting force, the helix angle should be larger as far as possible.
主倾角:适度减少主倾角能够改进热管散热标准,使均值温度降低。
Main inclination angle: reducing the main inclination angle can improve the heat dissipation standard of heat pipe and reduce the average temperature.
3、改进刀 具构造
3. Improve the tool structure
降低车刀齿数增加容屑室内空间。因为铝合金材料塑性变形很大切削变形很大,须很大的容屑室内空间,因而容屑槽底半经应当很大、车刀齿数偏少为好。
Reduce the number of turning tool teeth and increase the space of chip chamber. Because the plastic deformation of aluminum alloy material is very large, the cutting deformation is very large, and a large space for chip holding room is needed. Therefore, it is better to have a large half diameter at the bottom of chip holding groove and a small number of turning tool teeth.