However, these standards impose various restrictions on milling cutters and inserts, which stipulate the shape and thickness of the blades, the inscribed circle of the cutting blades, the dimensions of the blade holder and wedge clamping parts, and the size of the cutter body. Due to the limited design range of blade material, edge and chip breaking groove, the standard tool suppliers and production are limited by the machining function.
However, today, the concept of milling cutter tends to be flexible. Computer gong machining provides tool developers with the freedom to adopt new tool and blade design. These designs can be optimized. With the new tool concept, CNC machining can better solve the problems of machining safety, accuracy, surface quality, metal removal rate, tool overhang, high-speed cutting, and the ability of different cutting paths Question.
Today’s milling tools are constantly optimized to meet the needs of modern production, machine tools and data, and are widely accepted by all industries. The new cutting tool can remove metal several times faster, with smaller cutting force and better orientation. Its typical runout is only a fraction of that of the old standard tool. Therefore, the machining tolerance can always be controlled in a smaller range, and the cutting edge loss is also smaller and more ideal. The axial and radial runout is very small, which means that the cutting edge accuracy is improved, so the surface quality of the workpiece is better, the tolerance is smaller, the tool life is longer, and the cutting load is more evenly distributed, so as to improve the cutting speed and reduce the noise, vibration and loss.
The use of tools also helps to increase spindle speed, high speed feed and hard part milling, and extends the opportunities for dry cutting. The design of these tools is more concise, and the amount of work required for adjustment and maintenance is very small. The cutter body is rigid and accurate in size. It is made of pre hardened steel to ensure that the blade is accurately and firmly installed on the milling cutter body, and the appropriate tooth pitch can be selected according to different application.
The new milling tools use the blade material and groove type developed for specific data or process. The functions and achievements of the new milling cutters equipped with these blades are far better than those of ISO or ans standard tools and inserts. Compared with most standard blades, modern new blades and tools can provide larger positive rake angle and more complex groove shape, thus reducing cutting force and forming synergistic effect of faster and more stable metal removal.
Strengthen the concept of die precision
- Die is a precision forming tool used for batch forming and stamping. Mold precision includes the accuracy of parts obtained in processing and the quality awareness of ensuring product accuracy during production. However, the mold precision generally refers to the accuracy of working parts of mold.
① The concept of precision in mold processing refers to the degree of conformity between the actual geometric parameters and the designed geometric parameters after the mold parts are processed and assembled.
② The concept of precision in die and mould production refers to the various thinking modes and quality consciousness formed gradually by the employees in the production practice to guide their production behavior. It is a kind of quality consciousness that the enterprise staff and workers always implement the quality consciousness of grasping the product precision in their behaviors.
- The precision of mould includes four aspects: dimension precision, shape precision, position precision and surface precision. Due to the working time of the mold, the upper die and the lower die are two parts, so the position accuracy between the upper and lower dies is the most important among the four kinds of precision.
When the machining precision is very high, the mold is often surplus but force is insufficient. The precision of the die is about 1.0 ~ 0.01 mm, which is much higher than that of the former one. However, such as the engine components, but the accuracy is required to be less than one thousandth of a millimeter, or even smaller. Therefore, it is impossible to completely replace cutting with die.
Mold now its own smoothness, roughness has been a great leap forward. However, the mold itself is also made by machine tools. If the accuracy of the machine tool used to manufacture the mold itself can not pass the standard, the precision of the products produced must not be high.
About the author