Stainless steel cutting should overcome the characteristics of cutting stainless steel materials
Sus303, SUS304 and SUS316 of vostian iron series are in the majority of stainless steel materials that are frequently cut. However, due to their high corrosion resistance and strength and toughness, such materials will have problems of difficult heat dissipation, work hardening and tool sticking to chips during cutting, making their machinability more difficult< br>
In order to overcome the characteristics of cutting stainless steel materials, the material, coating and tool design of cutting tools are the key points. Stainless steel cutting series products are mainly aimed at stainless steel cutting. The description is as follows:
1、 For stainless steel cutting, in addition to easy chip breaking and good chip removal, how to take away the processing heat energy and reduce the work hardening phenomenon< br>
2、 Stainless steel cutting adopts wet cooling, and the more suitable coating is "G10"< br>
3、 High spiral angle R groove and seismic design; In high efficiency machining, the cutting speed VC can reach 100~120m/min, and it also has 1D machining capacity in groove milling and side milling< br>
HSK tool handle tool taper handle detection and dynamic balance should be placed at an important position
In modern automobile industry, aircraft manufacturing, gas turbine manufacturing and other industries, in order to improve production efficiency, high-speed and ultra-high-speed cutting machines with spindle speed of tens of thousands or even tens of thousands of revolutions per minute are widely used. At such a high speed, the 7:24 tool taper shank commonly used in traditional cutting shows a series of shortcomings, which has been difficult to meet the machining requirements of high-speed cutting< br>
Therefore, many advanced production lines at home and abroad have widely used a new type of 1:10 short cone hollow taper handle (HSK handle) to replace the 7:24 taper handle. Because HSK tool taper shank has superior performance in stiffness, radial circular runout accuracy, repeated installation accuracy, tool life, etc., it has been rapidly popularized. However, as the import price of various types of hollow handle tools is very expensive, it is necessary to base on domestic production and manufacturing. Developing domestic HSK hollow taper handle tools is an important task facing China's tool industry< br>
At present, there is no formal international standard for HSK interface. Manufacturers of HSK interface related products in various countries design and manufacture according to the standards din69893 and din69063. Therefore, the inspection and dynamic balance of HSK tool handle should be placed in a very important position< br>
High precision tool chucks differ depending on the manufacturing tolerances used< br>
The tool collet provides a standard connection between various cutting tools and the spindle of the machining center. It works like an adjustable drill chuck, just like a home repairman can change the drill bit of a jackhammer. The spindle hole of the machining center and the handle and flange of the tool collet are manufactured according to the standards. These standards have been developed worldwide in the past 30 years. In general, the formulation of these standards is relatively complete. As long as the spindle and tool collet meet the requirements of the standards, the connection between them can be ensured to be firm and have a high concentricity< br>
Because the tool collet adopts standard structure and its innovation and development is relatively slow compared with the main body of the machine tool, a lingering impression has been formed among some users of the machining center: the tool collet seems to be a "commodity" (standardized product). It is also easy to draw this conclusion from the number of tool collet manufacturers who have been successful in the market competition today. However, some end users do not agree with the concept of "commodity". It is true that all tool chucks of a certain type look alike, but certainly not exactly the same< br>
In most metal cutting processes, the difference between qualified parts and scrap often lies in the very small difference in key dimensions. Similarly, the difference between a high-precision tool collet depends on the manufacturing tolerances used. The rotation axis of the cutting tool must be exactly consistent with the rotation axis of the machine tool spindle. The approach to achieving near perfect concentricity is clear but complex< br>
First, when installing the taper handle of the tool chuck into the corresponding spindle taper hole, it must be very accurate every time. For this reason, the taper tolerance of the mating surface must be very small. These tolerances are formulated and issued by national or international standards committees and are generally available for anyone to consult. The roundness and cone angle of the manufactured tool chuck shall be measured with gauges, and these quantity rules shall be calibrated by the physical reference gauge. The measurement methods adopted at the production site vary from physical contact mechanical measurement, physical contact / electronic analog measurement to non-contact analog measurement (such as gas gauge). All these effective methods have a common feature: they all need to be calibrated with a physical reference gauge.