Kunshan Meiyaxing Hardware Machinery Co., Ltd., a direct branch of Hong Kong Meiya International Trading Co., Ltd., owns its own tool brand: MANF, and engages in the sales and operation of CNC tools. It provides tungsten carbide end mills, milling inserts, turning inserts, grooving and parting inserts, drilling and boring inserts, multi-functional inserts, threading inserts, and other indexable inserts and their matching tool holders and tool holders. It has also established long-term strategic partnerships with many well-known manufacturers, with joint R&D, design, and production teams, advanced equipment, and continuously innovative technological strength. They are committed to mutual cooperation, guided by technical services, forming a mutually supportive industrial chain to solve various machining problems for processing and manufacturing enterprises. DT8A, as a high-purity, hairline-free pure iron (also known as military-grade pure iron), occupies an important position in the fields of national defense, aerospace, electronics, and precision instruments due to its excellent electromagnetic properties and vacuum tightness. However, its machining characteristics bring unique challenges to the machining industry. DT8A pure iron is extremely soft (HBS). The DT8A steel (50-80 mm) has high plasticity and toughness, making it prone to "tool sticking" during cutting. This leads to rapid tool wear, difficulty in chip removal, and compromised machining accuracy. Therefore, selecting the appropriate tool and knowing when to use it are crucial for efficient and high-precision machining of the DT8A.
II. Knowing When to Use Tools for DT8A Machining
Appropriate selection of tool type and cutting parameters requires flexible switching based on the machining stage and working conditions:
1. Large Carbide Roughing Stage: This is the stage where the tool bears the greatest load. YG8 carbide tools should be the first choice, utilizing their high bending strength for heavy-duty cutting to quickly remove excess material. At this time, a lower cutting speed (vc≈50m/min) combined with a large depth of cut can improve efficiency.
2. Precision Semi-finishing and Finish Turning Stages: The core of this stage is ensuring dimensional accuracy and surface quality. Switch to YT14 or high-performance, sharp-edged coated carbide tools. To prevent tool wear leading to dimensional deviations, appropriately increase the cutting speed (vc=60-80m/min) and reduce the depth of cut and feed rate. Using a double-edge rake tool can effectively break chips at low feed rates, protecting the machined surface.
3. Complex Working Conditions such as Drilling and Milling: Consulting cutting parameter guidelines from mainstream tool manufacturers reveals that when machining sticky materials such as stainless steel, a higher spindle speed combined with a lower feed rate is recommended, along with the use of water-soluble cutting fluid to facilitate chip removal and heat dissipation. The same applies to machining DT8A, especially for small-diameter drilling (e.g., φ6-10mm), where the spindle speed should be maintained between 1600-3800 min⁻¹, and the feed rate controlled between 0.04-0.10 mm/rev to prevent tool sticking and breakage.
The core challenge in machining DT8A pure iron lies in its "soft" nature and "sticky" cutting performance. Correctly determining when to use carbide tools for roughing and sharp-coated tools for finishing, and optimizing tool rake angle, chip flute parameters, and cutting parameters based on its plasticity, are key to overcoming problems such as rapid tool wear and difficulty in ensuring accuracy. Through scientific selection and parameter matching, not only can tool life be significantly extended, but the precision machining advantages of DT8A can also be maximized.
If you have any questions about MANF brand tools, please call us for consultation or negotiation"
Contact us:Company name:Kunshan Meiyaxing Hardware Machinery Co., Ltd;Tel:8618962438699;Address: Room 3003, Building 3, Zhengtailong, No. 1288 Chengbei Middle Road, Kunshan City, Jiangsu Province, China;Email:myxcuttingtools@gmail.com;Website: https://www.myxcuttingtools.com
