In the course of optimal knife handle that seeks a kind to machine a design in the light of efficient milling, contractive knife handle undertook the Haimer of the tight system of Safe-Lock safety lock that a plane of American makes manufacturer have new research and development to matching check (graph 1) . A kind of combination that this kind of clamping apparatus basically is contractive knife handle and locking component applies. Milling treatment is having main effect in aircraft manufacturing industry. Producing Die Casting when, need uses cutting tool and pattern. In addition, forging also need fabricating, just can be used next, if walk on the place such as the orgnaization. The special type data that aviation industry place uses (be like aluminous, titanium and composite material) it is difficult to often gave treatment exercise to bring with the appearance. The large structural member that another characteristic of aviation manufacturing industry is many to containing cavity undertakes milling, this kind of workpiece general from sincere of a whole begin milling treatment, often can the original material that is as high as 90% can be dropped by cutting. All these treatment must achieve top quality and highest precision, to this besides machine tool equipment, the effect of clamping apparatus is very main also. To titanium alloy treatment faces enormous challenge likewise, because the treatment rate of place pursuit is very slow,this is, and the amount that cut bits is very large however. Competitive pressure also makes aviation manufacturing industry pay attention to manufacturing efficiency more. Accordingly, the efficient milling that uses equipment drive power to the limit (namely high-powered cut, HPC) got the heat of the industry is held in both hands. For quite a long time, the special type tool that promotes work of this kind of treatment is had to be able to be offerred on the market use, these tools can bear force of very tall torsion, feed and pulling force. The clip of attrition join chuck holds force to suffer be restricted to be below this load condition, milling cutter is increased from the dangerous sex of the emergence in chuck; Because this needs a kind of precision that be the same as a circle at least,the cutting tool mix with tall, exact tensile force runs unit, if contract,chuck or hydraulic expand chuck. This kind of chuck uses attrition to lock up decided mechanism, clip holds force to be restricted certainly, and in HPC treatment circumstance clip holds force to be able to be not worth sometimes. As optional, the user can avoid occasionally and the clip of Weldon cutting tool with traditional choice runs unit, bolt of its Zhang Jin can have the closedown effect of force. From this torsion can be delivered by random, till milling cutter is broken off till. But, when the user is choosing clip of Weldon cutting tool to run unit, be equal to everybody the defect with hep place brought back the home at the same time: Inadequacy of precision of the sex that be the same as a circle and clip hold position not beautiful, because the knife handle on chuck needs to have a bit space,this is, the cutting tool that uses in HPC circumstance is costlier, and service life is briefer. Have not make a consideration to other program, this also is a challenge that clip of Haimer company cutting tool supports an expert to be faced with. Their research and development gives a kind of Safe-Lock that be called (the safety lock is decided) system, it combines contractive chuck or other and accurate chuck and closedown element together (graph 1~3) . Systematic principle is: Milling cutter bright on set whorl groove, closedown clamping apparatus was set in groove. Carry whorl key seat, cutting tool can be stayed in by close solid at the same time, avoid to come back pigheaded excessive and fall off. This also can be ball or pin. From this, people combines the advantage of the high accuracy of contractive Zhang Jin and closedown function together namely. The lock that cutting tool emergence prevents when system of graph 1 Safe-Lock is aimed at efficient cutting for a kind decides a system, the system of 2 Safe-Lock of knot composition of a picture that this system shows to fall in contractive condition in the graph pursues union of systole or other chuck and closedown component together chuck of systole of 3 Power Shrink Chuck has two kinds of type: Long model (A) and short model (B) . It can achieve very high surface quality, the length of treatment circumstance cutting tool that OK in all sorts of difficult cutting applying is adjustable this is far insufficient still. Adopt the whorl model of keyway, undertake modulatory to the length of cutting tool, clip runs a course very simple. People resembles undertaking heating to chuck euqally before, repass bolt movement guides cutting tool. Ball or pin enter keyway by oneself in rotational process in. The tool accessories with unoccupied place to very close to each other bedspring undertakes propping up. After a few seconds, clamp refrigeration comes down, establish a kind of attrition and closedown link from this. Safe-Lock system is after the aggrandizement sex test of ministry of inside and outside of all previous classics, proved its are practical already adequately. But, the biggest with impression making a person the deepest intensity checks, it is not long ago the new aircraft that in the United States a large flying mechanism builds a plant yuan undertake in component production. When machining titanium metal, cutting tool the emergence on the chuck of the cutting tool clamp from all high accuracy. This also caused the serious damage of precious workpiece. Immediately place chooses Weldon clamp however the precision that short of place needs, cause inadequacy of cutting tool service life thereby. Accordingly, chief of this production branch is willing the chuck of new-style systole of Power Shrink Chuck of the Haimer company that try out contains Safe-Lock system. On a vertical planer-type milling machine that contains HSK-A-100 port, used contractive chuck of a Power-Shrink-Safe-Lock, chuck grows 120mm, set the bore of a 32mm. Be aimed at rough machining and finish machining, use same the cutting tool of completely hard metal of kind of film, its are effective cut length is 83mm. Regard a test as appearance, used a slashing plane part that makes character by titanium 6AL4V material. In experiment process, right on equipment main shaft of cutting tool point of a knife undertook metrical with circularity (total bulgy length: 171mm) . Below the circumstance of the Safe-Lock system that contains Haimer company, it is with circularity 0. 005mm. When the Weldon clamp that uses another supplier below coequal condition, its are achieved only with circularity numerical value 0.
05~0.
Between 08mm, the measured value difference that compares Power-Shrink-Safe-Lock chuck is decuple. Cutting tool emergence also is a problem no longer: Because use Safe-Lock system, cutting tool does not have occurrence shift phenomenon on chuck in whole treatment process. This the result of pressure test exceeded the anticipation of manufacturing branch chief even: Because use Safe-Lock chuck, the service life of cutting tool was lengthened double much. In exterior quality respect, also put in the difference with obvious move. No matter be rough machining or finish machining, after using Safe-Lock chuck system, won't produce oscillatory phenomenon, because this also won't appear moire mark -- this and Weldon chuck as it happens are contrary. This differentia surprise is very obvious. Safe-Lock system does not accept the restriction of Haimer contractive chuck with the principle at system of contractive chuck Safe-Lock only not only. It is OK also by compositive expand to pincers chuck or hydraulic on chuck. Because Haimer company already filed patent to this, think as a kind of standard configuration recommends an user, because this is in at present,undertake cooperative with the supplier of cutting tool manufactory and clamp of other cutting tool. Its experience and idea should be met those who blend in pair of Safe-Lock systems is farther in optimizing, go. The graph contains milling cutter one kind 4, but the assorted device of the Weldon of left-hand rotation and right-hand rotation and Safe-Lock. Haimer company development gave a kind of union the Weldon chuck and Safe-Lock system, technology program that can be aimed at all sorts of harsh treatment conditions to make cutting tool is standardized. To make cutting tool is made the manufacturer can realize stronger standardization, in the future, weldon chuck and Safe-Lock system can are together by union. Two kinds of diverse cutting tool mix are held and locking plan reachs his to the production manufacturer of cutting tool for the user, mean pair of diverse mix to oppose more agile application of the technology. Use Weldon face and Safe-Lock key seat through be united in wedlock on a cutting tool, realized a kind of reliable clip to maintain technology and the good tie that a kind of new-style cutting tool locks up calm technology. CNC Milling
CNC Machining