Kunshan Meiyaxing Hardware Machinery Co., Ltd. is a service-oriented enterprise specializing in the sales and operation of CNC cutting tools. We provide tungsten carbide end mills, end mill inserts, turning inserts, grooving and parting inserts, drilling and boring inserts, multi-functional inserts, threading inserts, and other indexable inserts, along with matching tool holders and tool holders. We have established long-term and stable strategic partnerships with well-known professional manufacturers of high-efficiency tungsten carbide end mills. The company possesses advanced production equipment from Swiss Rollomatic, German Walter, and Japanese Makino Seiki, as well as German ZOLLER-GENIUS 3S and American PG... With 1000 and other testing equipment, relying on our service and operations, and guided by strong R&D and production capabilities, we solve various tooling problems for processing and manufacturing enterprises. We aim to become a professional partner providing comprehensive tooling solutions and cost optimization services, focusing on optimizing product processing costs to achieve mutual benefit and common development.
DT8A, a high-purity, hairline-free pure iron (also known as military-grade pure iron), occupies an important position in the defense, aerospace, electronics, and precision instrument fields due to its excellent electromagnetic properties and vacuum tightness. However, its processing characteristics bring unique challenges to the machining industry. DT8A pure iron is extremely soft (HBS 50-80), has high plasticity and high toughness, and is prone to "tool sticking" during cutting, leading to rapid tool wear, difficulty in chip removal, and difficulty in guaranteeing machining accuracy. Therefore, selecting appropriate tools and grasping the timing of their use are the core keys to efficient and high-precision machining of DT8A.
I. Advantages of Tool Selection for Machining DT8A
Given the "soft and sticky" material characteristics of DT8A, tool selection should focus on "sharp chip removal" and "wear resistance." The main advantages are reflected in the following two types of tools:
1. Carbide Tools: The Mainstay for Roughing and Continuous Cutting
· Advantages: Possesses high hardness and bending strength, suitable for withstanding large cutting loads. For roughing, tungsten-cobalt carbide tools such as YG8 are recommended, as they have good impact resistance and thermal conductivity, capable of handling large depths of cut (ap=3-6mm) and large feed rates (f=0.35-0.4mm/r) during DT8A roughing.
· Key Points for Use: Due to the high plasticity of DT8A, tool geometry parameters need to be optimized. The rake angle should be increased (γO=25°-30°) to reduce cutting deformation and cutting force, and a wider chip flute (width 15-20 times the feed rate) and a larger radius of curvature should be used to facilitate chip removal and prevent chip entanglement.
2. High-speed steel and finishing tools: Powerful tools for precision cutting and discontinuous machining
• Advantages: High-speed steel (such as W18Cr4V) has excellent toughness, and its cutting edge can be ground to an extremely sharp point. For soft materials like DT8A, the sharp cutting edge effectively "cuts" the material rather than "crushes" it, significantly reducing the surface hardening layer and tool sticking.
• Usage points: For finish turning, YT14 can be used. Carbide tools are used with smaller cutting parameters (vc=60-80m/min, ap=0.1-0.4mm, f=0.1mm/r). For machining complex contours or thin-walled parts, sharp and vibration-resistant high-speed steel tools are more advantageous.
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, is 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.
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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
