High speed machines successful key

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  • source:LAMOND CNC Machining
The article picks from: The move that Steve Ortner of magazine of American MoldMaking Technology had machine tool, cutting tool and process designing is combined correctly, die manufacturer machines results high speed all advantage. The key with high speed successful treatment condenses for 3 element: (1) machine tool, (2) cutting tool and (3) process designing. This 3 person right combination makes the competitor that mould manufactory compares them in productivity, quality and price respect has an advantage more. Wrong combination wastes your hardship to make the money that come. Apparent, choosing correct machine tool to measure treatment to optimizing high speed, Xiaoyu is crucial. Accordingly, finding the machine tool that machines a design technically for high speed is important. Not by the product temptation that has standard machine tool transforming with high speed options. Otherwise, you will get the tigidity that does not finish place of your task of the most difficult treatment to need, precision and rate. In application of this mould treatment, machining center of double pillar structure is in for the bracket cutting that the H-13 steel of hardness HRC 52 forms a mixed pattern antrum. Handling time is 2.

5 hours. (the photograph is offerred by company of Absolute Machine Tools) 1.

The has rigid structure machine tool that we search the machine tool can absorb vibration, offer stiffness and counteractive bending, although be when very tall acceleration. First consideration is passed completely finite the yuan of analysis, has a large number of reinforcement and cast-iron structure machine tool that provides life of optimal cutting tool and exterior surface roughness. In addition, guide screw of system of the slideway that should pay close attention to a machine tool closely, slideway, ball and balance deserve to weigh. Although machine tool itself ought to very heavy, but its shift component should as far as possible weight is light and do not sacrifice rigid. Weight is light and the guide with good tigidity can obtain the rapiddest acceleration to shorten whole cutting time. As to slideway system, your application decided to whether use the machine tool that has ball guide screw or linear guide. Linear slideway special apply to those who have low torque main shaft is small the machine tool to medium-sized norms. And those who have tall torque main shaft is medium-sized to guide screw of ball of requirement of large HSM machine tool. Although with what main shaft machine tool uses high rotate speed together every are planted,the system can undertake light cutting with very rapid rate, ball guide screw is being decreased brace up the respect has an advantage really. So how should you undertake choosing? The answer perhaps is both all but. Manufacturer of partial machine tool uses linear guide in X axis and ball guide screw is used in axis of Y, Z. Linear slideway bears the load of workbench weight. This makes axial inertial the smallest change, it is even when workbench load change is very big. Had system of ball guide screw, need shuttle table and the torque value that overcome crawl become fluctuant very big and adjust hard. One of structural essential factor with any the mainest machine tools are ball guide screw, but it was ignored normally. You need big diameter, strong ball guide screw to prevent bending and vibration. Flimsy, the ball guide screw with light weight can make the task is finished scarcely. The machine tool that ensures you get contains beforehand the ball guide screw of drawing (taut below load) with purify heat is out of shape, eliminate sub creep and raise axial tigidity. If machine tool structure cannot support beforehand the ball guide screw of drawing, so ball guide screw must undertake cooling through circular fluid, and this produces maintenance problem again. One is not had beforehand the demarcate that the machine tool of drawing ball guide screw must want to have precision, but perhaps remain axial tigidity to be not worth. Should have fixed bolt of the long distance machine tool of very long ball guide screw / the abrupt shift of circumgyrate nut plant with preventing bolt, and servo electric machinery should be together to join rigidly in order to form repeatedly with ball guide screw directly. Servo electric machinery does not join directly (for example, use leather belt annulus with leather belt) the forfeiture that can cause athletic character and tigidity, precision of final meeting sacrifice and exterior surface roughness. because of very tall in HSM acceleration, use those who deserve to undertake the balance is to won't do again. Accordingly, the balance system that you use need machine tool a large servo electric machinery that need not balance or a hydraulic pressure (consult the machine tool in column of the following side designs: The advantage of double pillar structure and match control, electric machinery and drive) . Main shaft is the core of a kind of any machine tools. Although many main shaft type can be offerred, include the main shaft of gear case and direct drive, but most agree with of HSM application is the compositive main shaft that produces top rotate speed or electric main shaft. A very good experience law is to search main shaft rotate speed from 15, 000 to 40, the machine tool of 000 Rpm. Compositive main shaft mixes electric machinery individual plant continent is united in wedlock together, arbor of substantial main shaft is rotor, and the axle sleeve of main shaft is stator. Ask when you when very high rotate speed and very good surface surface roughness, they are very ideal. Although compositive main shaft maintains cost as a result of its tall and become very costly, but they can provide admirable thermal stability, be out of shape small, exceedingly good acceleration / decelerate and enough cutting torque. All these apply to HSM is crucial. 2.

Cutting tool of HSK cutting tool is the 2nd key of success application HSM. Invest HSK knife handle, because be in,tigidity and CAT/BT of excel of knife handle of HSK of rotate speed respect are mixed MCAT/BBT system. Do not try to buy cheaper cutting tool. In the final analysis, you decrease only purchase cost. And all profit that you never will reap HSM machine tool. In what problem is CAT/BT system put? Below high rotate speed, they cannot be placed well hold. Because they rely on the awl surface contact with main shaft to obtain tigidity only,that is. As main shaft rotate speed rise, the clip pulling a hammer that can stretch them from mental efforts runs a system. Below high rotate speed, because main shaft head is slight from the action of mental efforts expand, because the pulling force of pull rod is constant, the knife handle that causes a tradition faces towards main shaft interior moves further. Of this kind of cutting tool hind pull the dimension precision that changed Z axis and can bring about cutting tool conglutinate to be on main shaft. But why need not Where is MCAT/BBT system? Because of the double contact between end panel of machine tool main shaft and face of knife handle flange, and the contact with main shaft cone, make their tigidity gets rising. This kind of contact reduced a machine tool between the vibration when high rotate speed and machine tool main shaft and knife handle cone small brace up wear away. But, MCAT/BBT knife handle has the as same as CAT/BT system mix that pull a hammer to hold configuration, and the same question that can come up against centrifugal force to cause. Differ with traditional knife handle, HSK knife handle is hollow, and their clamp orgnaization begins the work from interior, make knife handle does not suffer the effect of centrifugal force. Still have, because HSK is short awl handle, the position of main shaft bearing approachs main shaft head more, tigidity gets rising. The HSM machine tool that is you with supplier collaboration and application undertake selecting first-rate HSK system, this is a very good idea. HSK-A system does not exceed 24 to rotate speed, the tall torque cutting of 000 Rpm is ideal. On the other hand, HSK-E knife handle does not have the drive slot of A system, improved the balance below high speed consequently. This sort special the low torque finish machining that applies to main shaft high rotate speed to fall. Experience law is do not exceed 15 to rotate speed, the heavy cut of 000 Rpm uses large HSK-100A, of medium-sized norms HSK-63A apply to rotate speed not to exceed 24, the finish machining of half precise and penetrating of 000 Rpm, and diminutive HSK-50E knife handle applies to high speed finish machining. This pattern that is used at bracket antrum and model core is one is used on machining center of a double pillar 4 ' X 3 ' X 3 ' H-13 steel (hardness HRC52) honest stuff is cost 2.

5 hours of treatment come out. 3.

Process designing since you had had first-rate HSM machine tool to already used HSK knife handle. But the result that you still cannot get you to want. Whether did you ignore process designing? Using the process designing software that is used at conventional treatment and method to HSM to machine all the same is a common error. But use the software that undertakes optimizing in the light of HSM, you will get superior spare parts quality and better integrated result. The treatment that you still will attend to in nobody (use a variety of cutting tool bos to break the ground to machine a spare parts first and last) in achieve consistent result. In addition, if your process designing software identifies the surplus that goes up to machine accurately, your aux will be able to enters semifinishing machining to need not transfer directly from rough machining cutting. Advanced now CAM system has place of success application HSM must a few character. The most important is to embrace some software to be able to compress real data to exterior data. A lot of systems are in when creating machine program apparently the reseau that places a triangle. Unfortunate is, place in all apparently triangles with these tiny not be real exterior data. And going up at all, the software of this kind of type will damage exterior surface roughness and precision when treatment. The other key character that wants the CAM that search includes treatment of method of cycloidal type rough machining, contour line and surplus to identify automatically reach rework. Searching correct software package and partner's right machine tool is the foundation that carries out high speed treatment successfully. Accordingly, should find can decrease brace up the structure has the rigid and wonderful machine tool, advanced campaign that has optimizing in the light of HSM system and the main shaft of high rotate speed that can handle task of your the most difficult treatment. Construct on that strong base next correct knife handle and process designing. One final is recommended - the craft that requests help of your machine tool supplier to optimize you. They can help you design to be able to reflect crackajack supplier to help the solution that optimizes craft. They can apply you to design for your HSM outstanding and the solution with consistent effect. Remember, correctly modular machine tool, knife handle and process designing machine the high speed that causes a success and protect your factory has competitive advantage. Moldmakers Will Reap All The Benefits Of High-speed Machining With The Right Mix Of Machine Tool, tooling And Programming.

Machine tool design: The machine tool design with the basic dominant position of double pillar structure is having tremendous effect to HSM treatment. Those who take machine tool of C form frame and double pillar system is different make give an example. Design of C form frame is common at small-sized / the machine tool of medium-sized norms, rated workbench load is less than 1, 500 Lbs, it has the head with an a lathe bed, pillar and slip fluctuation of an edge pillar. Over axis of Y of park of axis of X of this kind of configuration general, it makes the load on two axes is alterable. When workbench load is changed, make the machine tool adjusts hard with control this is planted alterable load, two axes are affected. On the machine tool of frame of form of a C, workbench perhaps gets be proppinged up completely through slide, but slide never is propped up completely by cast lathe bed. The inherent instability that this causes cannot be accepted by HSM. Contrary, structure of double pillar bridge-type is mixed to medium-sized norms is ideal for bigger HSM machine tool. In this kind of configuration, y and Z axis have fixed load, and the load of only workbench is changing. Because axial load is mixed inertial never change (the indistinctive difference except of cutting tool and knife handle weight) , this makes the machine tool is mixed in Y Z to can by very accurate adjustment. Design of bridge-type of this kind of double pillar is peculiar still a very long cast lathe bed, it can prop up the journey that workbench grows with getting used to machine tool pole completely. This kind of configuration was eliminated lopsided or tilt and deflexion. Numerical control machine tool is online detect the child that machine tool of technical numerical control is contemporary high-tech development, every time when a batch of spare partses begin to machine, have detect in great quantities need to finish, the outfit card that includes clamping apparatus and part, search, of origin of spare parts process designing determine, of first spare parts detect, detect between working procedure reach treatment to end detect etc. The main step that completes these detecting to work at present has handiwork to detect, detect from the line and online detect. Online detect also say real time detects, it is the real time in the process that machining undertake detecting to cutting tool, make corresponding processing according to detected result. Online detecting is one kind is based on computer automation detect technology, its detect the process is controlled by numerical control program. Closed circuit is online detected advantage is: Can assure precision of numerical control machine tool, enlarge function of numerical control machine tool, improve performance of numerical control machine tool, improve efficiency of numerical control machine tool. The online testing system of numerical control machine tool is comprised by software and hardware. Hardware part divides composition by the following normally: (Noumenon of 1) machine tool: Machine tool noumenon is implementation treatment, detected foundation, its job component is the part that implementation wants to move basically, the precision of its drive disk assembly is affecting treatment, detected precision directly. (System of 2) numerical control: At present numerical control machine tool uses system of CNC numerical control commonly, its are main the characteristic is operation of input memory, CNC Machining, interpolation and machine tool all sorts of control functions pass a program to come true. Interface equipment connection can be passed between the computer and other unit, when controlling object or functional change, need to change software and interface only. CNC system is mixed by memory of the processing central commonly composition of input output interface, central processor is comprised by memory, arithmetic unit, controller and bus line again. (3) servo: Servo is the main component of numerical control machine tool, the control of feed position servo of machine tool of numerical control of implementation of in order to and main shaft rotate speed (or the position) servo control. The function of servo is the precision of treatment of decision machine tool, main factor that measures quality of precision, surface and manufacturing efficiency. (4) surveys a system: Measure a system to the contact touchs hairdo to measure head, signal to transmit system and data to collect a system to comprise, it is numerical control machine tool the crucial part of online testing system, immediate impact is worn online detected precision. Among them crucial part is measure a head, use measure a head to be able to undertake in machining a process dimension is measured, modify machine program automatically according to measuring an outcome, improvement machines precision, make since of numerical control machine tool machines equipment, hold concurrently again measure some kind of function of machine. (All of 5) computer science department: Benefit of online testing system is collected with what the computer undertakes metrical data and processing, detect of numerical control program generate, detect of the process emulate reach wait for a function with communication of numerical control machine tool. Online testing system considers run the software such as current and popular Windows and CAD/CAM/CAPP/CAM and VC++ , and reduce the analysis that measures an outcome and computational time, use the computer of Pentium level above commonly. The move that had machine tool, cutting tool and process designing is combined correctly, die manufacturer machines results high speed all advantage. CNC Milling CNC Machining