Surface wire drawing treatment is a surface treatment method to form lines on the workpiece surface by grinding products and play a decorative effect. Because the surface wire drawing treatment can reflect the texture of metal materials, it has been loved by more and more users and widely used.

表面拉丝的加工方式，要根据拉丝效果的要求、不同的工件表面的大小和形状选择不同的加工方式。拉丝方式有手工拉丝和机械拉丝两种方式。

For the processing method of surface wire drawing, different processing methods shall be selected according to the requirements of wire drawing effect and the size and shape of different workpiece surfaces. There are two ways of wire drawing: manual wire drawing and mechanical wire drawing.

1、平压式砂带拉丝：

1. Flat pressing sand belt drawing:

平压式拉丝是很常见的一种拉丝方式，工件固定在模具上，研磨砂带高速运转，砂带的背面有一个气动控制的可以上下移动的压块，下压后砂带贴服在被加工表面进行拉丝。通常使用的设备是平压式砂带机。平压式拉丝适应于小面积平面的拉丝表面，广泛应用于数码相机外壳的拉丝，手机外壳的拉丝等等。这种拉丝表面出来的线纹通常是连续丝纹的直丝。

Flat pressing wire drawing is a very common wire drawing method. The workpiece is fixed on the die, and the abrasive belt runs at high speed. There is a pneumatically controlled pressure block that can move up and down on the back of the abrasive belt. After pressing down, the abrasive belt adheres to the machined surface for wire drawing. The commonly used equipment is flat pressing belt sander. Flat pressing wire drawing is suitable for small area flat wire drawing surface. It is widely used in the wire drawing of digital camera shell, mobile phone shell and so on. The lines on the surface of this drawing are usually straight wires with continuous lines.

由于使用砂带，具有广泛的粒度范围选择，所以既可以选用粗粒度砂带加工出粗犷的、有明显的手感线纹，也可以选用细粒度砂带而加工出较为细腻的丝纹。3M公司不仅可以提供普通砂带，还可以提供更加适合拉丝的金字塔系列砂带和不织布尼龙砂带。砂带对这个表面整体研磨拉丝，会产生大量的热量，并且在工件的拉丝一面产生应力集中的问题，尤其对薄壁零件会产生起翘变形的问题。所以这种方式适应于小面积的拉丝加工。

Because the use of abrasive belt has a wide selection of particle size range, both rough and obvious hand feel lines can be processed with coarse-grained abrasive belt, and fine silk lines can also be processed with fine-grained abrasive belt. 3M company can provide not only ordinary abrasive belt, but also pyramid series abrasive belt and non-woven nylon abrasive belt more suitable for wire drawing. When the abrasive belt grinds and draws wire on this surface as a whole, it will produce a lot of heat, and the problem of stress concentration will occur on the drawing side of the workpiece, especially on thin-walled parts. Therefore, this method is suitable for small area wire drawing.

由于是下压式的操作，所以通常是应用于平面，表面不能有突台，例如突起的文字标识等。不过通过对压块等模具的巧妙设计，也可以对略有弯曲的工件进行拉丝。具体方法要视弯曲的程度来具体讨论。

Because it is a down pressing operation, it is usually applied to the plane, and there shall be no protruding platform on the surface, such as protruding text marks, etc. However, through the ingenious design of dies such as pressing block, wire drawing can also be carried out on slightly curved workpieces. The specific method should be discussed according to the degree of bending.

2、不织布辊刷拉丝：工件由传输带传送通过不织布辊刷，辊刷高速旋转对工件表面进行拉丝。拉丝时可以采用辊刷振动和辊刷不振动两种方式，同时配合不同加工速度从而产生长短不同的线纹。不织布辊刷振动，可以产生非常均匀一致的不连续丝纹（短丝）；不织布辊刷不振动，可以产生连续丝纹（长丝或叫直丝）。

2. Non woven roller brush wire drawing: the workpiece is transported by the conveyor belt through the non-woven roller brush, and the roller brush rotates at high speed to wire the workpiece surface. During wire drawing, roller brush vibration and roller brush non vibration can be adopted, and different processing speeds can be matched at the same time, so as to produce lines with different lengths. The vibration of non-woven roller brush can produce very uniform discontinuous filaments (short filaments); The non-woven roller brush does not vibrate and can produce continuous silk lines (filaments or straight filaments).