Machine a domain in cutting at present, hollow short awl handle (HSK) already gained ground more and more, because it compares,this is 7: Knife handle of 24 big taper is mixed in precision, tigidity applicable high rotate speed and change a knife to go to the lavatory wait for a respect to have clear advantage. Of standard of HSK formal international announce what will make it gets each country inside bigger range to admit. But when applying this kind of new-style knife handle, as a result of the characteristic on its structure, still must master the size that concerns its carrying capacity and use note, ability makes sure ground of barrier of safe, without reason works. holds water make " HSK, technical standard " working group basis needs, it is before 1993, to hollow short awl handle (HSK) just begins the work around the formulate of the DIN standard of all sorts of norms, and right how correct and reasonable those who use all sorts of norms is hollow short awl handle (the research work consideration of HSK) is not much, only right a few hollow short awl handle (the norms of HSK) is correct and reasonable use undertook study. Its reason is, this part job was exceeded at that time the working limits of formulate standard. However at this late hour, to ensure the promotion of HSK knife handle and safety apply reasonably, concerned knife handle uses a problem correctly to appear very pressing. Pass formulate the technology of a directiveness is normative, provide specific service data, can help a company reasonable use this knife handle. For this, the machine tool lab that was in university of industry of A go smoothly 1999 established a working group, working group member comes from manufactory of the cutting tool with world famous each country, knife handle the user of business and HSK, support this research work on financial capacity. The main task of working group is to decide the performance data of HSK knife handle: Can susceptive is the biggest curved quadrature, torque and use top rotate speed. And the condition of these performance data and application (be like clamp means and clamping force) about, the element such as the data that also uses with place of production knife handle and heat treatment craft is concerned. Use the small norms knife handle that cementite steeliness builds for example, because the wall in awl handle part is large very thin, what meeting occurrence temper by dipping in water appears is likely, make knife handle bears the ability of dynamic load is reduced greatly. bears the weight of the ability of curved quadrature and clamping force bend quadrature about the susceptive on knife handle is the power generation that goes up in cutting tool by transverse action. The carrying capacity bending quadrature of knife handle is to be below curved rules effect the value bending quadrature when making knife handle begins depart of flange interface at the same time, from this critical turn quadrature value begins, curved quadrature, be out of shape the trend of diagnostic curve becomes steep apparently, show the join intensity that knife handle outfit places is reduced quickly. When adjacent and critical point, join intensity is already insufficient, although right now the flange face of knife handle and main shaft end panel still maintain comprehensive contact, dan Wanju is adjacent already make the critical value of both depart. The size of quadrature of this critical turn basically depends on taut force, because this is increased,taut force can raise the biggest curved moment. This extend longer cutting tool to have special sense to hanging, right now a lesser cutting force can produce bigger curved moment. But the total load that increases taut force to be able to increase action to go up in cant of knife handle clamp, be in especially tall use pass fast below, because leave the action of mental efforts, the clamping force that in-house clip claw brings to bear on increases subsequently, the dependability that causes clamp is able to rise, but the place that makes knife handle the thinnest however on the other hand bears very big load, cause knife handle damage. How does decide the carrying capacity to torque to be able to produce very great cutting power and torque when milling of big negative charge, HSK knife handle must can bear, deliver such torque. To decide knife handle is the biggest the carrying capacity of torque, undertook static state and dynamic load experiment especially. When the experiment, till,increase torque gradually knife handle invalidation. Turn round by what use the HSK63 date knife handle that different material makes, be out of shape the curve is seen, below the action of load, knife handle is out of shape at flexibility first level, bear the weight of into what enter outfit clip later level, the curve is relatively flat, because there is attrition force between the interface in knife handle and main shaft,this is, form very tall turn round tigidity. After overcoming this attrition torque, tigidity drops subsequently. Continue to increase load, transmission key begins to bear torque, till knife handle damages. This shows, closely related the size of attaint torque and material. If can choose material correctly, can increase the carrying capacity of knife handle apparently. To decide the carrying capacity of the biggest torque of knife handle, become a static state only the experiment is insufficient still, the trends that produces in cutting treatment is stimulated brace up continuously below action, knife handle bears the ability of torque drops apparently. The ultimate torque of the HSK63 date knife handle that listed different material is made in the watch bears the weight of value. Can see by the watch, 7% dynamic to all material carrying capacity is large. Of knife handle of date of watch HSK63 bear the weight of clamping force of function HSK-63 A-C knife handle: 15KN, 18KN, depart of 21KN flange end panel bends quadrature: 420Nm, 460Nm, 510Nm slip torque: 115 ～ 155Nm, 138 ～ 186Nm, experiment of static state of 161 ～ 218Nm destroys torque: 2200Nm(16MnCr5, 56HRC) , 2400Nm(41Cr4, 53HRC) , 3300Nm(X46Cr13, 53HRC) trends experiment destroys torque: 1600Nm(16MnCr5, 56HRC) , 1800Nm(41Cr4, 53HRC) , 2400Nm(X46Cr13, 53HRC) is highest use rotate speed: 22500r/min(most peccadillo is filled with cooperate) , 27500r/min(most the serious offence is filled with cooperate) to E structure (do not take key seat) HSK knife handle, transmissible is the biggest torque is to rely on the attrition between knife handle and main shaft to come true, its size divides the difference that cooperates precision with taper to have outside Shanghaiguan, still depend on taut force. The 18KN that the slip torque of knife handle of date of a HSK63 is recommending according to DIN standard is 138 ～ 186Nm below taut strength condition, if enhance taut power to 21KN, slip torque can rise about 20% , amount to 161 ～ 218Nm. is used finite yuan of the biggest rotate speed that imitate law determines to the biggest rotate speed is used to decide knife handle, applied finite yuan of imitate law. It can determine the rate with knife handle and puffy when high speed rotates main shaft, can present the metabolic state of clamp place. Because give priority to axial aperture to bilge more greatly than HSK knife handle, below high rotate speed, the clamp between main shaft and knife handle cooperates (join) was loosened, osculatory end panel also appears clearance, make the ability of radial tie knife handle is lost completely, knife handle can be in main shaft aperture rock. The size of the clamp load that knife handle interior gets and distributing besides be concerned with cutting bear and rotate speed, still concern with clamp system and taut force. The biggest rotate speed that allows the rotate speed regulation that makes knife handle loses radial fixed position or stress to exceed material to allow stress for knife handle. Below high rotate speed, not only advocate the balance of knife handle is very principal, and the balance of whole tool system is very principal also, because of what although each component of tool system is,had balanced, because make common difference, after forming tool system still the likelihood is lopsided. HSK already got applied as a high-powered safe knife handle, its structure parameter will make international standard very quickly. To avoid overload, in be used actually, knife handle of accurate knowledge HSK is mixed to the largest carrying capacity of curved quadrature, torque use top rotate speed, no matter return the production manufacturer that is knife handle to the user very be necessary, so that be aimed at specific use condition to choose measure of true HSK knife handle and structure, accomplish reasonable, use surely. CNC MillingCNC Machining