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Taizhou Union Plastic Mould Co.,Ltd

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Email:sales@tzunionmould.com

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Prospect Of High-speed Cutting In Die Manufacturing
Nov 25, 2018

In the United States, Germany, Japan and other industrial developed countries, its mold industry in recent years is undergoing a large-scale technological revolution, which is to gradually replace electrical processing equipment with high-speed cutting machine tools, high-efficiency precision machining of mold cavity. These machine tools mainly include a variety of high-speed CNC milling machines, machining centers.

Features of high-speed machine tools

1. High load bearing and high rigidity

This is because the mold is developing toward large size, processing equipment must have a large enough table size and work schedule to adapt to it. Now, a few tons to dozens of tons of mold is very common, requiring the machine table to be able to withstand heavy weight. The strength and hardness of the die materials are very high, and the small diameter end milling cutter with large elongation is often used to process the die cavity. In order to ensure the machining accuracy and surface quality of the parts, the high-speed machine tool used in mold manufacturing must have high dynamic and static stiffness to improve the positioning accuracy, tracking accuracy and anti-vibration capability of the machine tool

2. High speed and high power

High speed machining is the development direction. High speed milling has shown great advantages in die machining. In order to adapt to the machining of the mold cavity surface, the tool radius should be smaller than the minimum circumference radius of the mold surface, so as to avoid "interference" between the tool and the workpiece during the machining process. As the tool diameter is small, the spindle speed is required to be very high. The spindle speed of foreign high-speed machining machines has reached 40,000 ~100000r/min, and the rapid feeding speed can reach 30,000 ~60000min. The rough and finish machining of the cavity and other parts of the mold part is usually done in the workpiece assembly. Therefore, the spindle power should be large. The spindle power of the medium-size mold milling machine and the machining center is usually 10~40kW, some even higher

3. Multi-axis linkage and good comprehensive cutting capacity of deep hole cavity

Mold cavity is composed of complex 6 curved surface and groove, and many molds have deep cavity. In order to achieve high precision, high speed and high stability machining of 3D curved surface, the machine tool needs multi-axis linkage and has good comprehensive cutting capacity of deep hole cavity. The five-axis machining center can be used, in addition to the linear motion of three coordinates, there are two feeding motions of rotating coordinates. The milling head or working table can be used for continuous rotary feed, which is suitable for machining die parts with complex cavity surface.

Advantages of high-speed cutting technology in die manufacturing

Advantages of high-speed cutting technology in die manufacturing

1. High processing efficiency

Using high speed cutting, not only machine speed is high, feed is fast, but also rough finishing can be done in one time, which greatly improves production efficiency. Combined with numerical control technology, the manufacturing cycle of die can be shortened by about 40%.

2. High degree of automation

High speed machining dies require neither electrodes nor subsequent grinding and polishing. It is also easy to realize the automation of machining process, which improves the development speed of the dies.

3. High surface quality

Quench hardened steel can be processed by high-speed cutting technology, and high surface quality can be obtained. The surface roughness is lower than Ra0.6 mm, and the machining effect of milling instead of grinding can be achieved, which not only saves a lot of time, but also improves the machining surface quality

4. Compound processing has a broad prospect

While machining center has many compound machining process can be implemented on a machine tool, but it is still not completely adapt to mould processing, mechanical processing and electrical, chemical, ultrasonic principle of different processing methods, such as composite, with two or more process characteristics of the composite processing in the mould manufacturing will have broad prospects in the future.

At present in the mold processing manufacturing process, mainly to common machine processing and edm. General machine tool processing mold cavity is generally before heat treatment rough processing, semi-finishing and finishing, then grinding, polishing, time - consuming and laborious. Edm is cutting after annealing, then heat treatment, edm, and finally grinding, polishing. With the acceleration of the update speed of consumer products, more and more high requirements are put forward for the production efficiency and manufacturing quality of mold. According to luo baihui, to shorten manufacturing cycle and reduce cost, advanced machining technology must be widely adopted. The emergence of high-speed cutting technology, which represents advanced manufacturing technology, meets the requirements and features of modern die machining