Deep Kong Jia is versed in experiment of cutting tool tatty studies

Deep aperture treatment applies extensively at the domain such as aerospace, car, shipping. As a result of product requirement diversification and the requirement that change in a small way, treatment of small diameter deep aperture becomes more and more general. Small diameter deep aperture machines gun of tool first selection to get, but the treatment status that close or closes partly is in when the gun gets treatment, cannot observe directly the cutting circumstance of cutting tool, and cut what bits causes a bore easily to jam, in addition, small and deep Kong Dao sends cooling fluid to reach cutting area not easily, cause auger cut a condition abominable, cutting tool wears away serious. The platoon bits with so medium process of gun getting treatment and cutting tool wear away the problem is technical difficult problem all the time. Once the cutting tool in machining a process happens wear away, will cause get the change that bits cuts in cutting a course, affect the treatment quality of aperture, serious when can bring about cutting tool invalidation. Accordingly, the cutting tool that the gun gets wears away the question is crucial. In recent years, researcher is right of cutting tool wear away the problem did a lot of research. To cutting tool tatty the method that monitor has a lot of kinds at present, treatment is cut in small deep Kong Zuan in, the axial force in passing treatment course commonly comes of token cutting tool wear away condition. Qin Guohua wear away to cutting tool in the light of cutting parameter the influence of state and service life, the cutting tool that considered to be based on nerve network and genetic algorithm wears away detect with control method. Song Lei force in machining a process through deep aperture and torque monitor cutting tool to wear away. Li Jingtao carry different cooling and lubricant kind, analysis and face of the knife after comparing the cutting force that 45 steel place gets and cutting tool wear away state. Jung J.

Wait to got deep aperture treatment to undertake to the gun mechanical build a model, the change that adopts monitoring torque will reflect the wear out condition of cutting tool. From in last few years in light of research, domestic and international scholar cuts cutting tool tatty to consider to have a lot of to getting, having a lot of among them is the wear out condition that forecasts a model to study cutting tool through building, but get tatty influence to however rarely document gives a rule to the gun about parameter of craft of gun getting treatment. The article passes a test, studied the gun gets treatment craft parameter to get tatty effect to cutting force and gun. 1 gun gets treatment system gun to get treatment is deep Kong Jia the bits of very common one the platoon outside planting in labour machines means. Cutting fluid is entered from cooling aperture reach bit hand-in-hand travel is cooling and lubricant, will cut bits next from V chamfer eduction. Gun getting machines a system to get cutting tool and composition of machine tool system by the gun. The treatment way that the gun gets has: ① workpiece rotates, cutting tool rotates and feed; ② workpiece is fixed, cutting tool rotates and feed; ③ workpiece rotates, cutting tool feed. In this second experiment because treatment deepness is bigger, need to be used in broach head oriented set undertake directing. And workpiece weight slants big, to get the treatment hole of high accuracy, use cutting tool to rotate so and undertake getting cutting machining into given treatment way. Gun getting structure sees a picture 1, by broach, drill pipe, get a power 3 parts composition. The bit that the gun gets can be made by different material, have on broach oriented piece, use at raising the precision that machines aperture; There is V chamfer to be used at discharging bits on drill pipe; Get a handle to be used transfer power. The cooling fluid that the gun gets affects the situation that discharge bits directly, high-pressured cooling fluid chooses commonly in treatment. (1 gun gets composition of a picture of C) whole knot 2 experiments condition and method are in the structure boring machine of efficient deep Kong Zuan has a test, ZWKA-2108 of machine tool model, 80mm of φ of diameter of the biggest treatment, 3000mm of deepness of the biggest treatment. Workpiece uses material of 45 round steel bar, dimension is 300mm of  20mm × , treatment deepness is 175mm, every time uses new cutting tool to undertake machining. The experiment uses hard alloy gun to get, diametical φ 6mm, 200mm of length of drill rod, model of drill pipe flexibility measures E=6.

1e5MPa. Axial force is used 3 to milling the appearance that measure power undertakes metrical, of cutting tool wear away the value undertakes metrical with all-purpose tool microscope. Get in gun getting in cutting treatment course, outside of cutting blade wear away than inside cutting blade is serious, of blade of the cutting outside be being used commonly hind the judge standard that VB regards knife face wear extent as cutting tool life. Accordingly, the cutting tool that this second experiment records wears away the wear extent that the value is face of the knife after blade of the cutting outside gun getting. The research that waits according to Li Baoguo, the rotate speed limits that this second experiment chooses is 2000-3500r/min, the limits of feed speed is 30-45mm/min. To ensure the accuracy of this second experiment, have a test 2 times to each influencing factor, take average. In the experiment, because gun getting is long diameter comparing is big, tigidity is poorer, cutting speed and feed rate should increase gradually to formulary rate. This second experiment has a test to each influencing factor, if experiment data logging expresses 1 to show. Express 1 experiment data logging 3 results are analysed (1) the influence of treatment craft parameter to cutting force machines craft parameter by what express 1 scale to go out to the influence of cutting force the rule sees a picture 2. Graph the cutting force below speed of 2 different rotate speed, feed can be seen by the graph, below same feed speed, as the addition of rotate speed, cutting force is in taper. When choosing different feed career, as the addition of rotate speed, the current that cutting force reduces differs somewhat; When low feed speed, the current that cutting force reduces is faster; When same rotate speed, as the addition of feed speed, cutting force increases. When 2500r/min of rotate speed prep above, the cutting force below different feed speed all has descendent tendency, as a whole, the rate that the cutting force below low feed speed drops is rapidder. (2) tatty of face of the knife after treatment craft parameter is right affects a figure 3 express for the basis 1 in tatty of face of the knife after the treatment craft parameter that data scale gives is gotten to the gun affects the pattern. Graph below speed of 3 different rotate speed, feed outside face of the knife after blade wears away value by the graph knowable, when same feed speed, as the addition of rotate speed, knife face wears away after the value is shown in the begining reduce a current, but when feed rate is older, after rotate speed exceeds 3000r/min, hind of knife face wear away to the value increases as rotate speed continuity and increase. When same rotate speed, as the addition of feed speed, hind of knife face wear away the value increases. Can see from inside the graph, as the addition of rotate speed, of face of the knife after different feed rate falls wear away the value has constant wave motion. Of face of the knife after low feed rate falls wear away the scope that is worth change is little, of face of the knife after and compare other feed rate falling wear away the value is little. Brief summary (1) the experiment explains, cutting force follows the accretion of rotate speed and reduce, increase along with the accretion of feed speed. Below the case with feed very big speed, rotate speed is the main factor that affects cutting force; When low rotate speed, feed speed is the main factor that affects cutting force; When 2500r/min of rotate speed prep above, the cutting force below different feed speed all shows descendent trend. (2) the experiment explains, hind of knife face wear away to the value follows the change of rotate speed and change, when rotate speed is more than 3000r/min, face of the knife after entering what fall to speed high wears away to increase and increase what the value follows rotate speed, auger appropriate choice rotate speed wants when cutting treatment; Hind of knife face wear away the value increases along with the accretion of feed speed, below low feed speed hind knife face wears away when the value is less than tall feed speed hind of knife face wear away value, machine Kong Shi to want to choose low feed career. (3) the experiment explains, of face of the knife after the factor that affects cutting force also can is opposite at the same time wear away the influence with value certain generation. The change of cutting force is brought about vibration produces in machining a process, the osculatory force between the cutting tool when making machine and place treatment aperture becomes not stable, as treatment continuity undertakes cutting tool happening wears away bringing about. The change of the vibration that this shows to in machining a process, arise and cutting force is tatty of influence cutting tool main factor. (4) through the experiment the analysis reachs, machine the fluctuant hour of force of the cutting in the process, the vibration in treatment also will be reduced, the osculatory force between cutting tool and Kong Zhi changes to also will be reduced, of ultimate cutting tool wear away will reduce. The specification reduces the vibration in treatment, variation that reduces cutting force to be able to reduce cutting tool wear away. (5) pass a test knowable, lower feed rate, increase rotate speed appropriately, can reduce the cutting force in machining a process not only, also can reduce cutting tool wear away. CNC Milling