The most important tool component design in CNC machinery is critical

The tool design of the most important part of CNC machinery is critical. An important part of the design of this tool is the grinding of the cutting edge, which causes the cutting force to deviate from the blade edge and change direction to its base. Three such cutting edges are appropriate: negative chamfer, honing, and honing negative chamfer. The negative chamfer is like a chamfered plane of the cutting edge, which replaces the weak and sharp tip. The goal of the tool designer here is to find the minimum bandwidth and angle to ensure sufficient strength and life of the cutting edge, because the width and angle increase when the blade is strengthened but also increase the cutting force. Honing is used to dull sharp cutting edges. Taizhou Zhaochen Welding and Cutting Automation Equipment Co., Ltd. is a high-tech enterprise integrating Ru0026D and sales of mechanical and electrical products and computer software and hardware. As a technology-based enterprise in the software export base of Taizhou District, it always adheres to the people-oriented idea of u200bu200bscience and technology, and actively absorbs all kinds of Talent.

Although they do not provide the same protection against fretting as negative chamfering, honing is very effective for finishing inserts made of advanced materials with a small depth of cut and a small feed to maintain the minimum cutting force. Honing can also strengthen the negative chamfer at the intersection of the front and flank surfaces. When micro-cracking occurs in steel parts with ceramic rough turning, honing can release the stress there and strengthen the blade without widening the negative chamfer. In addition to specifying the best edge grinding for a certain process, the tool designer must also optimize the cutting angle and be able to evacuate chips. By increasing the relief angle to reduce the cutting force, the stress on the tool is reduced and the temperature of the cutting zone is reduced. The value of the positive rake angle is as large as possible, and the cutting force is reduced by better shearing and the space of the chip flute is widened. The discharge path is enlarged to help chip discharge, especially in drilling and threading. (Guide: Analysis on finishing control of mold parts)

Another way to keep the tangential cutting force low is high-speed cutting. The high feed rate at very high spindle speeds reduces rather than increases the impact on the workpiece by as much as 75% to 90%, depending on the tool and processing parameters. Furthermore, dry machining improves the thermal stability of the cutting process; milling cutters are at least more accurate in size than five years ago; and modern milling and turning machine tools become more rigid enough to eliminate excessive vibration. All these developments support the use of brittle but harder and more wear-resistant tool materials.

Because of the high feed rate, the tool cuts the chips so fast that most of the heat stays in the chips and has no time to flow to the workpiece and cause distortion. Despite the high cutting temperature, the thermal stability of the workpiece is better and more accurate than under the condition of traditional metal removal rate. Low-impact finishing also minimizes the static deformation of workpieces, fixtures and machine tools, as well as cutter heads with small inserts and low-density materials at high linear speeds and lower feeds per revolution. Because only a low clamping force is required to support the workpiece, the fixture can be made simple and does not require a complex system of reinforcing ribs, workpiece support and clamping elements. The result is that the machine tool feeds more on all sides of the box part.

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