Production process and quality standards of grinding steel balls
Grinding steel balls are widely used in aviation, aerospace, bearings, motors, high-precision instruments, valves, petroleum and other industries. So do you know what is the production process of grinding steel balls? What are the quality standards for grinding steel balls? Let ’s take a look at the production process and quality standards of steel balls.
Honing steel ball production process
1. Wire drawing (wire drawing): the wire is drawn with a wire drawing machine to the required wire diameter;
2. Cold heading (forging): Place the drawn wire into a steel ball cold heading machine, and the steel mold inside the machine is beaten into a ball blank;
3. Light ball: Two cast iron grinding balls in the light ball machine will grind the cold ball embryos under pressure to remove the outer ring belt and poles on the ball embryo;
4. Soft ball: two cast iron grinding ball discs in the soft ball machine will grind the light ball ball embryo to make the ball embryo into the required ball diameter and surface roughness;
5. Heat treatment: the ball is placed in a heat treatment furnace and then carburized after quenching and then tempering so that the ball has a certain carburized layer and hardness, toughness and crushing load;
6. Hard grinding: The grinding wheel discs in the grinding machine pressurize the heat-treated spherules to remove the black oxide layer on the surface of the ball and correct the accuracy of the ball;
7. Refining / polishing cleaning: Refining: grinding the grinding globules in the refining machine to make the balls reach the precision and finish required for the finished product; polishing cleaning: pouring the balls into the polishing drum and rotating with a polishing cleaner Add water to clean and brighten the sphere;
8. Selection of appearance: use manual visual inspection to check the surface of the ground steel ball for any flaws, and use a micrometer to measure the roundness, the change in the diameter of the batch, and the surface roughness with a surface roughness meter as the final inspection;
9. Packing: Coated the steel ball / stainless steel ball / bearing steel ball with anti-rust oil and put it into a carton or woven bag.
Grinding steel ball standard
1. Raw material quality standards
The material used for the ink grinding ball is GCr15 bearing steel. Based on this, Qingdao Feite has innovatively produced GCr15SiMn and martensitic stainless steel grinding balls with better wear resistance. It is currently the only company in China that has formed a series of products. It is widely used in the ink manufacturing industry.
2. Standards for dimensional accuracy and geometric accuracy of ground steel balls
Grinding steel balls with a diameter of 1.2 ～ 12.7mm, ball diameter variation ≤25μm; batch diameter variation ≤50μm; spherical error ≤25μm; gauge value ± 150μm (can be formulated according to user requirements)
3.Crushing load standard of steel ball
This standard is an important standard to ensure that the steel ball is not broken.
4. Quality standard for heat treatment of milled steel balls
This standard is an important basis for ensuring that the steel balls have high wear resistance and high hardness
The above is an introduction to the production process and quality standards of grinding steel balls. I hope that everyone will be helpful after understanding the production technology and quality standards of grinding steel balls.
