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Machining objects and features of NC lathe

返回列表 source:xiangyuanBrowse:174Published time:2016-11-28

铝压铸件的设计与塑胶件的设计比较相似,塑胶件的一些设计常规也适用于压铸件。 2.对于铝合金,模具所受温度和压力比塑胶的大很多,对设计的正确性要求特严。即使很好的模具材料,一旦有焊接,模具就几乎无寿命可言。锌合金跟塑胶差不多,模具寿命较好。 3.不能有凹的尖角,避免模具崩角。 4.压铸件的精度虽然比较高,但比塑胶差,而且拔模力比塑胶大,通常结构不能太复杂,必要时应将复杂的零件分解成两件或多件。 5.铝合金的螺孔通常模具只做锥坑,采用后加工。对于要求严的配合部位通常留 0.3mm的后加工量。 6.铝合金压铸易产生气孔,在外观上需加以考虑。 铝合金压铸件(含硅)表面做阳极氧化很难的,一般时间稍长回出现黑色。 铝合金压铸件不能做阳极氧化,可用喷油或喷塑。The design of aluminum die castings is similar to the design of plastic parts, the design of plastic parts is also applicable to the die casting. 2 for aluminum alloy, the mold temperature and pressure than the large plastic, the design of the correct requirements of special. Even if very good mold materials, once there is welding, die almost no life at all. Zinc alloy with plastic, mold life is good. 3 there is no sharp concave mold, avoid corner collapse. 4 die casting precision although relatively high, but worse than plastic, and draft than plastic, usually the structure is not too complicated, when necessary parts of the complex is decomposed into two or more pieces. 5 screw Aluminum Alloy usually die only after processing by cone pit. For the requirements of the complex parts usually left 0.3mm after the amount of processing. 6 aluminum alloy die casting is easy to produce porosity, in appearance, it needs to be considered. Aluminum alloy die castings (silicon containing) surface to do the anode oxidation is difficult, generally a little longer back to black. Aluminum Alloy die casting can do anodic oxidation, available injection or spray.
(1) high difficulty processing
Forming surface parts, non standard pitch (or lead), variable pitch, equal pitch and variable pitch or spiral parts which can smooth transition between the cylinder and the conical spiral surface can be processed on the NC lathe.
(2) machining of high precision parts
The precision requirements of the parts mainly refer to the size, shape, position and surface accuracy requirements, in which the surface precision of the main surface roughness.
Ultra precision rotary drum head parts in the VCR, copier and laser printer on polyhedral reflector, geometric contour accuracy up to 0.01 M, the surface roughness value of Ra 0.02 M. These high precision parts can be processed on special precision CNC lathe.
(3) the machining of hardened workpieces
In large mold processing, there are a lot of large size and complex shape parts.
The deformation of these parts after heat treatment of the large, difficult grinding, and turning machining of hardened parts with ceramic tools in CNC lathe, turning instead of grinding, improve the processing efficiency.
(4) high efficiency machining
In order to further improve the efficiency of the turning process, the same or different parts can be processed simultaneously on a CNC lathe by increasing the control axis of the lathe.