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.

表面拉絲的加工方式，要根據拉絲效果的要求、不同的工件表面的大小和形狀選擇不同的加工方式。拉絲方式有手工拉絲和機械拉絲兩種方式。

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、平壓式砂帶拉絲：

1. Flat pressing sand belt drawing:

平壓式拉絲是很常見的一種拉絲方式，工件固定在模具上，研磨砂帶高速運轉，砂帶的背面有一個氣動控制的可以上下移動的壓塊，下壓后砂帶貼服在被加工表面進行拉絲。通常使用的設備是平壓式砂帶機。平壓式拉絲適應于小面積平面的拉絲表面，廣泛應用于數碼相機外殼的拉絲，手機外殼的拉絲等等。這種拉絲表面出來的線紋通常是連續絲紋的直絲。

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.

由于使用砂帶，具有廣泛的粒度范圍選擇，所以既可以選用粗粒度砂帶加工出粗獷的、有明顯的手感線紋，也可以選用細粒度砂帶而加工出較為細膩的絲紋。3M公司不僅可以提供普通砂帶，還可以提供更加適合拉絲的金字塔系列砂帶和不織布尼龍砂帶。砂帶對這個表面整體研磨拉絲，會產生大量的熱量，并且在工件的拉絲一面產生應力集中的問題，尤其對薄壁零件會產生起翹變形的問題。所以這種方式適應于小面積的拉絲加工。

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.

由于是下壓式的操作，所以通常是應用于平面，表面不能有突臺，例如突起的文字標識等。不過通過對壓塊等模具的巧妙設計，也可以對略有彎曲的工件進行拉絲。具體方法要視彎曲的程度來具體討論。

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、不織布輥刷拉絲：工件由傳輸帶傳送通過不織布輥刷，輥刷高速旋轉對工件表面進行拉絲。拉絲時可以采用輥刷振動和輥刷不振動兩種方式，同時配合不同加工速度從而產生長短不同的線紋。不織布輥刷振動，可以產生非常均勻一致的不連續絲紋（短絲）；不織布輥刷不振動，可以產生連續絲紋（長絲或叫直絲）。

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).