Production technology and quality standards of steel milling balls

Steel ball grinding is widely used in aviation, aerospace, bearings, motors, high-precision instruments, valves, petroleum and other industries. So do you know what the production process of steel ball grinding is? What are the quality standards for grinding steel balls? Let's take a look at the production process and quality standards of steel balls.

Production technology of honing steel balls

1. Wire drawing (wire drawing): Use a wire drawing machine to draw wire to the required wire diameter;

2. Cold head (forging): Put the wire drawing into the steel ball cold head machine, and make the steel mold inside the machine into a spherical blank;

3. Light balls: Two cast iron grinding balls in the light ball machine will grind the cold balls under pressure to remove the outer ring belt and rod on the balls.

4. Soft ball: Two cast iron grinding ball discs in the soft ball machine grind the light ball embryo to the required ball diameter and surface roughness;

5. Heat treatment: Put the balls into a heat treatment furnace, quench and temper and carburize them to make the balls have a certain carburizing layer and have a certain hardness, toughness and crushing load;

6. Hard grinding: The grinding wheel in the grinder presses the heat-treated balls to remove the black oxide layer on the surface of the ball and correct the accuracy of the balls;

7. Refining/Polishing Cleaning: Refining: Grind the balls in the refining machine to achieve the accuracy and finish required for the finished product; Polishing Cleaning: Pour the balls into the polishing bucket and rotate them with a polishing cleaner. Add water to clean and brighten the sphere;

8. Appearance ion: Use artificial visual inspection to check whether there are any defects on the surface of the ground steel ball, and use a micrometer to measure the roundness, changes in batch diameter and surface roughness through a surface roughness meter as the final inspection;

9. Packaging: Apply steel balls/stainless steel balls/bearing steel balls with anti-rust oil, and then put them in a carton or woven bag.

Grinding steel balls

Standard for grinding steel balls

1. Raw material quality standards

The material used for ink grinding balls is GCr15 bearing steel. On this basis, Qingdao Fite innovatively produced GCr15SiMn and martensitic stainless steel grinding balls with better wear resistance. It is currently the only company in China to form a series of products. It is widely used in the ink manufacturing industry.

2. Standards for dimensional accuracy and geometric accuracy of grounded steel balls

Grinding steel balls with a diameter of 1.2~12.7mm, the diameter change of steel balls is ≤25μm; batch diameter change ≤50μm; spherical error ≤25μm; specification value ±150μm (can be prepared according to user requirements)

3. Steel ball crushing load standard

This standard is an important standard to ensure that the steel ball does not break.

4. Steel ball heat treatment quality standards

This standard is an important basis for ensuring that steel balls have high wear resistance and high hardness.

The above is an introduction to the production process and quality standards of steel milling balls. I hope everyone will be helpful to the production process and quality standards of steel milling balls.