Sand paper polishing and diamond grinding polishing should pay attention to the problem

In the mechanical polishing the basic procedures, wrote the macro introduced new material small make up half of mechanical polishing of pure threw and fine basic program, then threw the sandpaper polished and refined in the semi finished diamond grinding and polishing of the two types of polishing should pay attention to what problem, by large macro new material below small make up to you in detail their pay attention to the problem.

I. the following points should be noted when polishing with sandpaper:

1. Soft wood or bamboo sticks are needed for polishing with sandpaper. MIM experts found that when polishing a round surface or sphere, the use of a cork rod can better match the curve of the round surface and sphere. And harder wood like cherry wood, more suitable for smooth surface polishing. Trim the ends of the strips so that they are consistent with the shape of the steel surface, thus avoiding the sharp Angle of the strips from touching the steel surface and causing deep scratches.

2, when the switch to a different type of sand paper, polishing direction should transform to 45 ° ~ 90 °, so before a sandpaper model after polishing the stripe of shadow can be distinguished. Dahong new material reminds us that before changing to different models of sandpaper, we must use 100 % pure cotton to dip into alcohol and other cleaning liquid to wipe the polishing surface carefully, because a small piece of sand left on the surface will destroy the following polishing work. This cleaning process is also important when switching from sandpaper polishing to diamond paste polishing. All particles and kerosene must be completely cleaned before the polishing process continues.

3. In order to avoid abrasions and burns on the surface of workpieces, dahong new material reminds metal powder injection molding manufacturers to be particularly careful when using #1200 and #1500 sandpaper for polishing. Thus it is necessary to load a light load and to polish the surface by two-step polishing method. With every kind of model in polishing abrasive paper should be two polishing along two different directions, two directions between each rotation 45 ° ~ 90 °.

Ii. The following points should be noted for diamond grinding and polishing:

1. Dahong new material finds that diamond lapping and polishing must be carried out as far as possible under light pressure, especially when polishing the pre-hard steel parts and polishing with fine grinding paste. When polishing with #8000 grinding paste, the usual load is 100~200g/cm2, but it is difficult to maintain the accuracy of this load. To make this easier, make a thin, narrow handle on a wooden bar, such as a copper sheet. Or cut a piece of bamboo to make it softer. This helps control the polishing pressure to ensure that the mold surface pressure is not too high.

2. When using diamond grinding and polishing, not only is the working surface required to be clean, but MIM experts specially remind workers to clean their hands carefully.

3. The polishing time should not be too long. The shorter the time, the better the effect. The new material found that if the polishing process is too long it will cause "orange peel" and "pitting".

4. In order to obtain high-quality polishing effect, MIM industry leading manufacturers suggest that polishing methods and tools that are easy to heat should be avoided. For example: polishing wheel, the heat generated by polishing wheel can easily cause "orange peel".

5. When the polishing process stops, it is important to keep the surface of the workpiece clean and carefully remove all grinding agents and lubricants, and then spray a layer of mold antirust coating on the surface.

As mechanical polishing mainly relies on manual work, polishing technology is still the main factor affecting polishing quality at present. Besides, it is also related to mold materials, surface condition before polishing and heat treatment process. High quality steel is a prerequisite for good polishing quality. If the surface hardness of steel is not uniform or different in characteristics, it will often cause difficulties in polishing. Various inclusions and pores in steel are not conducive to polishing.

The above is by the big big new material small small make up to you detailed introduction in mechanical polishing sandpaper polishing and diamond grinding polishing to pay attention to the question, more about other polishing means of other content, welcome to consult guangdong big big new material metal powder injection molding MIM technical professional team answer for you!