1、刀具磨損加快:一般含高熔點(diǎn)元素、塑性大,切削溫度高,使刀具磨損加快,磨刀、換刀頻繁,從而影響了生產(chǎn)效率,提高了刀具使用成本。
2、切削力大,切削溫度高:該類型材料強(qiáng)度大,切削時切向應(yīng)力大、塑性變形大,因而切削力大。此外材料導(dǎo)熱性極差,造成不銹鋼加工切削溫度升高,且高溫往往集中在刀具刃口附近的狹長區(qū)域內(nèi),從而加快了刀具的磨損。
3、加工硬化嚴(yán)重:不銹鋼以及一些高溫合金不銹鋼均為奧氏體組織,切削時加工硬化傾向大,通常是普通碳素鋼的數(shù)倍,刀具在加工硬化區(qū)域內(nèi)切削,使刀具壽命縮短。
4、容易粘刀:無論是奧氏體不銹鋼還是馬氏體不銹鋼均存在加工時切屑強(qiáng)韌、切削溫度很高的特點(diǎn)。當(dāng)強(qiáng)韌的切屑流經(jīng)前刀面時,將產(chǎn)生粘結(jié)、熔焊等粘刀現(xiàn)象,影響鈑金加工零件表面粗糙度。
在鈑金加工過程中由于不銹鋼材料導(dǎo)熱性能差,在應(yīng)用中模性也是較小,孔一般在加工也是不難的;遇到鈑金加工困難,那我們應(yīng)該怎么解決呢?鈑金加工廠家提醒您那就是要選用合適的刀具材料,這樣才能確定刀具的參數(shù)和刀具的切削的用數(shù)。
1, tool wear accelerated: generally containing high melting point element, large plastic, high cutting temperature, cutting tool wear faster, grinding knife, changing knife frequently, thus affecting the production efficiency and improve the cost of cutting tools.
2, the cutting force is large and the cutting temperature is high: this type of material has high strength, large tangential stress and large plastic deformation during cutting, so the cutting force is large. In addition, the thermal conductivity of the material is very poor, which causes the increase of the cutting temperature of the stainless steel, and the high temperature is often concentrated in the narrow area near the cutting edge of the tool, thus speeding up the wear of the tool.
3. Machining hardening is serious: stainless steel and some superalloy stainless steel are austenite. The machining hardening tendency is large, usually several times of ordinary carbon steel, cutting tool in the hardened area makes cutting tool life shorter.
4, easy to stick knife: whether it is austenitic stainless steel or martensitic stainless steel, there are characteristics of chip toughness and cutting temperature. When the tough chip flows through the rake face, it will produce adhesion, welding and other sticky knife phenomenon, affecting the surface roughness of sheet metal parts.
In the process of sheet metal processing, due to poor thermal conductivity of stainless steel materials, in the application of the model is also smaller, the hole is generally in processing is not difficult, and facing the difficult processing of sheet metal, how should we solve it? Sheet metal processing manufacturers remind you that it is necessary to choose the right tool materials, so as to determine the parameters of the tool and the number of cutting tools.
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