In the past processing, grinding, polishing and other processes are often required after the milling process to achieve the required surface quality. If only milling can achieve this effect, the machining efficiency will be greatly improved. Recently, a series of test results of static pressure gas surface induced ultra precision machining carried out at the Federal Institute of technology in Zurich, Switzerland, show that the surface quality of the workpiece obtained by line by line milling can reach the level of RA less than 25 nm, while the surface quality of the workpiece obtained by surface milling can reach the level of RA less than 3 nm.
The surface quality of milling processing has been greatly enhanced, even reaching the level of polishing, and many subsequent processing has lost the necessity of existence, which greatly shortens the processing time and avoids the convex surface and corner grinding in grinding and polishing. In this kind of precision milling equipment, the function of tool shank is very important.
Wear free clamping precision tool shank
Conventional tool holders, such as collet tool holders and heat shrinkable tool holders, are difficult to complete precision milling tasks. Because there are tiny impurities in the clamping surface, problems such as chattering scratches, tool damage, inaccurate workpiece and concentricity error will occur in the processing. But the precision tool handle can effectively solve this problem.
For example, XiongKe tribos is a kind of precision tool holder. Its built-in stress locking clamping technology can control the runout and repetition accuracy within 0.003 mm. When the extension length is 2.5 x D and the rotation speed is 25000 rpm, the balance level reaches g 2.5. There is no movable part on the tool handle, so it is not mechanically sensitive, which can prevent fixture wear and material fatigue. In addition, it has excellent vibration damping function and fast tool changing speed.
XiongKe tribos series tool handles have different types of interfaces such as hsk-e 25, hsk-e 32 and hsk-f 32, which can meet various processing needs. It has been widely used in micro mold manufacturing industry, optical industry, medical technology industry, coin, watch and jewelry processing and other fields. It plays a pivotal role in improving the fineness of milling processing and protecting the tool life.
Reduce chatter and scratches in large cutting
In the process of large cutting volume, the tool shank will have a great impact on the surface quality of the workpiece, which is found and confirmed by the research of WBK Institute of production technology in Karlsruhe. This research institute has carried out full groove and half groove milling experiments on several machine tools, and conducted comparative tests on several different tool shanks. The test results fully prove that there are great differences in the surface quality of workpieces with different tool handles. The surface quality of precision tool shank is far ahead of that of ordinary heat shrinkable tool shank, especially when the groove is deeper, this advantage is more obvious.
Another advantage of the precision tool shank is the damping characteristic of the hydraulic expansion technology, which can effectively prolong the service life of the tool. Under the same other conditions, higher cutting rate and feed rate can be achieved.
In addition, precision tool holders and high-precision five axis machining equipment can form a perfect partnership. The hydraulic tool shank can effectively alleviate the vibration in the machining process, provide strong support for the extension rod, and minimize the contour interference. Moreover, the clamping time and tool changing time required by this set of equipment are very short, only a few seconds; The clamping device requires no maintenance and is not sensitive to impurities.
