How to deal with hard burrs?
author: hengzhan
2022-05-25
▷Choose a suitable process according to product characteristics and requirements:
In terms of plastics, in addition to liquid nitrogen and dry ice, lasers can also be considered; in terms of metals, in addition to the tool selection and processing path of CNC machining itself, the post-process is similar to magnetic/rolling/vibration grinding, mechanical polishing/grinding, fluid polishing, plasma Polishing etc.
▷Machining section to deal with hard burrs:
①It is recommended to use a 4-blade carbide knife, and the brand can first choose international brands such as Kyocera, Kennametal, Sandvik, etc.;
② Determine the appropriate amount of semi-finishing and fine-finishing cutting tools through verification, and match the forward and reverse rotation of the cutting tools and the empty run after finishing;
③If the structural characteristics allow, use a forming knife (chamfering) or a separate knife fillet. The cost of the tool can be replaced by a domestic brand in the future, and the balance point between tool life and cost can be found through verification.
▷Tunnel magnetic grinding:
①Each product is ground separately with a hanger, which can avoid extra DDS during the grinding process;
②There are conventional 0.50mm*0.50mm magnetic needles available;
③Suitable for mass production, the hanger can be shared with the next cleaning process, which can save labor costs;
④Easy to realize automatic production;
⑤ No effect on the overall size of the product (flatness needs to be verified for different grinding times/frequency).
▷ Fluid polishing:
①Suitable for metal and non-metallic materials;
②Especially suitable for products with special-shaped structures;
③Equipment/consumables (mainly composed of walnut powder or polymer materials) have low cost, simple operation and moderate efficiency;
④Walnut powder or polymer materials have various particle sizes, Different materials/particle sizes are combined with rough, medium and fine polishing to remove burrs and high-gloss surfaces;
⑤ has little effect on the overall size of the product;
⑥ has almost no dust pollution and no waste gas and water discharge.
cnc turning machining
In terms of plastics, in addition to liquid nitrogen and dry ice, lasers can also be considered; in terms of metals, in addition to the tool selection and processing path of CNC machining itself, the post-process is similar to magnetic/rolling/vibration grinding, mechanical polishing/grinding, fluid polishing, plasma Polishing etc.
▷Machining section to deal with hard burrs:
①It is recommended to use a 4-blade carbide knife, and the brand can first choose international brands such as Kyocera, Kennametal, Sandvik, etc.;
② Determine the appropriate amount of semi-finishing and fine-finishing cutting tools through verification, and match the forward and reverse rotation of the cutting tools and the empty run after finishing;
③If the structural characteristics allow, use a forming knife (chamfering) or a separate knife fillet. The cost of the tool can be replaced by a domestic brand in the future, and the balance point between tool life and cost can be found through verification.
▷Tunnel magnetic grinding:
①Each product is ground separately with a hanger, which can avoid extra DDS during the grinding process;
②There are conventional 0.50mm*0.50mm magnetic needles available;
③Suitable for mass production, the hanger can be shared with the next cleaning process, which can save labor costs;
④Easy to realize automatic production;
⑤ No effect on the overall size of the product (flatness needs to be verified for different grinding times/frequency).
▷ Fluid polishing:
①Suitable for metal and non-metallic materials;
②Especially suitable for products with special-shaped structures;
③Equipment/consumables (mainly composed of walnut powder or polymer materials) have low cost, simple operation and moderate efficiency;
④Walnut powder or polymer materials have various particle sizes, Different materials/particle sizes are combined with rough, medium and fine polishing to remove burrs and high-gloss surfaces;
⑤ has little effect on the overall size of the product;
⑥ has almost no dust pollution and no waste gas and water discharge.
cnc turning machining
