Improper selection of abrasive products used for wire drawing will have a great influence on the effect of wire drawing or drawing. Different abrasive products have different wire drawing effects. The same abrasive product has different particle sizes, and also produces different wire drawing effects. Since the abrasive products directly act on the wire drawing surface, it is very important to select the appropriate abrasive products and whether they are qualified or not.
1. About the belt
In wire drawing, an important factor is the surface consistency of the product. Consistency has two aspects: first, the surface drawing of the workpiece should be uniform, and second, the consistency of the drawing effect between different workpieces should be better, and the difference should be small.
The surface drawing should be uniform and consistent. At present, the effect of ordinary abrasive belts depends on the quality of the abrasive belt itself. For the consistency of wire drawing effect between different workpieces, ordinary abrasive belts are much worse. Because the abrasive belt itself is lossy during the wire drawing process, specifically, the abrasive is sharp and sharp at the beginning of the wire drawing, and the wire drawing line is deep, but soon after the wire drawing, the abrasive begins to become dull, and the drawn line pattern is relatively shallow. In this way, the same batch of wire-drawing workpieces will have obvious differences in the surface effect of the front-drawn products and the back-drawn products.
2. Nylon wheels (drawing wheels, gray wheels, gray reels, fiber wheels, non-woven grinding wheels) are made of high-quality mineral sand and high-quality fibers. Its advantages are: the wire drawing surface can have a certain curvature, the wire drawing effect is consistent before and after, and there will be no different texture depths or disordered wire drawing patterns due to the loss of abrasive products during operation.
Nylon wheel construction is anti-clogging. This is because it has the advantages of good adhesion and good heat dissipation. This advantage is conducive to the dissipation of heat during wire drawing, and is conducive to wire drawing processing of large surface areas.
It must also be noted that: the relevant factors of surface drawing treatment. There are many factors affecting the surface wire drawing treatment. In addition to the decisive factors such as the wire drawing method discussed above and the abrasive material for wire drawing, there are also some factors that will affect the final surface treatment effect and quality stability. For example, the material and shape of the workpiece to be processed, the surface state before wire drawing and the process parameters of wire drawing, etc. Analyzing these related influencing factors can deepen the understanding of the wire drawing process, so as to better design the wire drawing process and solve the problems in the wire drawing process.
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◆ The material of the workpiece to be processed: the hardness of the material has a significant impact on the effect of the wire drawing. The same drawing method, grinding material, for different materials, the effect of drawing is different.
◆ The shape of the workpiece: the size of the drawing area, whether the surface is flat, the curvature of the 3D surface, whether there are protrusions, etc. are all factors to be considered.
◆ The thickness of the workpiece material is sometimes also a consideration in the wire drawing process. For thin-walled plates, the phenomenon of warping and deformation of the workpiece is easy to occur after drawing, which is caused by different stresses on both sides of the plate caused by drawing.
◆ Wire drawing surface state: Some raw materials have been polished before wire drawing, and some raw materials have lines on the surface in advance.
◆ Wire drawing process parameters: The process parameters during wire drawing, such as the speed of the feeding speed, the speed of the grinding product, whether to set the swing, whether to use the cooling lubricant, how to place the workpiece to feed, etc., all have an impact on the wire drawing.
◆ After the wire drawing process is completed, in order to protect the lines on the surface and the post-processing of the wire drawing, anodizing treatment or chemical conversion coating treatment must be done for light metal materials such as aluminum alloy and magnesium alloy. Various protective treatments can be optionally performed for stainless steel. Such as passivation, ion plating, blackening, coloring and varnishing, etc.
