The gun gets a technology to process medium application in deep aperture of average boring machine

Time:2023-06-21 15:30:06
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source:SVEND CNC Machining

Summary: Deep aperture machines small diameter to basically be used on the tradition receive long twist drill, the article discussed applied gun to be gotten on average boring machine to machine the method of deep aperture. Structure of the working principle that summarized gun getting, composition and main parameter, with average boring machine deep aperture treatment is an object, be gotten to the gun and received long twist drill to undertake cutting contrast experiments, the main tool that discussed a gun to get cutting to machine deep aperture, parameter decides process and treatment effect, measured each cutting parameter.

Applied example makes clear: Gun drilling tool has treatment precision tall, handling time life of short, broach the characteristic with good bit of tall, platoon, in " small diameter deep aperture is machined " the respect has promotion value. 0. Foreword is current, the product amount that contains small diameter deep aperture is increasing, press traditional method treatment, can use only receive long twist drill, every machine about 1 ～ the deepness of 2 times diameter must retreat a knife to discharge bits, machine precision not only surface roughness of low, surface is poor, machine efficiency strength of labor of low, operation is great, quality assures hard, and cause very easily " block bits up " or break off broach, cause greater treatment difficulty, accordingly, "Old long way is machined than small deep hole " it is to puzzle the difficult problem with old system of cold working of a lot of enterprises, a also be technologist and handlers " anxiety " . How had solved the treatment of small diameter deep aperture for traditional production business, already made the task of extremely urgent. And the success application that the gun gets in some traditional production business and promotion, very good settlement puzzle the difficult problem with old company this. Because be used the earliest at arms industry processes barrel and getting a name,the gun is gotten, basically use treatment φ deep aperture of trail of 20mm of 2 ～ φ , it is at present deep Kong Zuan cuts a medium kind of high grade and efficient tool. Company of American getting family (DRILLMASTERS) the company serves as the mainest aperture treatment on the world to rotate one of cutting tool suppliers, the research and development that gets in the gun has old successful experience with production respect, the cutting tool of its place research and development has cutting efficiency precision of tall, treatment is good grow with cutting tool life wait for a characteristic, wide already application is versed in at auto industry, spaceflight course of study, structure builds industry of industry, medical treatment equipment, pattern / cutting tool / the manufacturing industry domain such as industry of metallurgical industry and oil pressure, pneumatics. 1. The gun of the working principle major that the gun gets gets a system to get machine, Chan Ren or two-edged by deep aperture gun getting and high-pressured refrigeration system are comprised (see a picture 1) . The gun gets petiole to be held to be on machine tool main shaft by clip, , broach leaves hole through guiding or guide-post bushing enters workpiece surface, after entering, the unique structure that plunges knife has the effect that directs oneself, assured cutting precision. At this moment cooling fluid reachs cutting place through the passageway among broach, will cut bits to take workpiece appearance from the chamfer that discharge bits, cool to getting blade to undertake at the same time and undertake lubricating to the stage of the protruding that prop up of back, capture good treatment appearance and treatment quality thereby. 1.

The structure that 1 gun gets is shown 2 times like the graph, the gun is gotten by get power of body of blade, knife, drive 3 parts composition. (1) getting blade to plunge knife is the crucial share that whole gun gets, its distinctive and scientific combination structure assures to work to still have the effect that directs oneself at the same time in the cutting that finish, can pass perforative the deep hole that gets a high accuracy. Get blade to two are spent basically, can choose the most appropriate combination according to be being come to by the material of cutting workpiece and form, break bits in order to facilitate the balance cutting strength with better job is mixed, transfer cutting power shoulder of the protruding that prop up, make sure good linearity and coaxial are spent. Get blade to have very small pour taper and diameter relatively knife body slightly big, it is OK to can assure to get a body rotate freely inside cutting aperture and won't grind the cutting surface of aperture wall, according to diverse demand, the channel that blade ministry has Chan Yuankong, kidney aperture and double round opening is the same as the oil duct of knife body to join, high-pressured cooling fluid can reach cutting point through this passageway, give the area that cut bits work. A few kinds when get blade to prop up main outside round outline form (see a picture 3) : R1: Form of standard shoulder ministry, apply to the general cutting such as alloy of carbolic steel, stainless steel, nickel and aluminium, when the job, cutting tool is the same as by the extruding action of cutting face the smallest; R2: Apply to aperture of bore with a reamer and cutting of the metal that be not iron; R3: Tall Liu Shi supports humeral department, better control machines dimension, be machined of the face bright and clean use when degree of demand is very high; R4: Tall Liu Shi is propped up, the rear is added tall, apply to the treatment of alternate aperture, blind aperture, reaming; R6: Tall Liu Shi is propped up, the rear sums tall reamer mood, with reamer combination, use at reaming treatment, oriented sex is good; R9: Tall Liu Shi does not join ministry of the shoulder that prop up, better control machines dimension. (2) body of knife body knife uses spaceflight industry special alloy rolled steel is made via heat treatment, knife body has 110 ～ the V of 165 ° chamfer, after high-pressured cutting cooling fluid reachs blade ministry via aperture of oil of body of drive handle, knife from now on outside aperture of V chamfer eduction, will cut bits to take away, to make sure the linearity of cutting and coaxial are spent, so that twisting the torque that cutting place offers to need below change form lesserly,knife body must have enough strength, at the same time knife body also must have enough tenacity, such ability absorb knife body high speed to come back change the line of production to shake unripely. (3) the regulation of method of treatment of industry of standard of complete according to produces power of drive handle drive. Its and the cervical place that the knife connects personally have the groove of smooth arc shape that eliminates stress to be destroyed in order to avoid because of stress is centered and arising, drive handle is cylindrical, common treatment has side two plane, hold sleeve locking for clip whole bit noumenon. 1.

Device of pulverization of refrigeration of high pressure of system of refrigeration of 2 high pressure is a system that whole gun gets systematic key, it has the lubricant, cooling, effect that discharges bits in machining a process. The compression that inputs a system pump of pulse of one part drive forms air sparge, another part air is successive drive piston pump, through two-way cop and pressurization of device of high flow sparge give cutting fluid, carry cutting fluid to broach cutting area, by the quantity of heat that the cutting fluid after pulverization absorbs cutting area, cooling, lubricant gun gets knife head, outside will cutting bits to play working thing compulsively. 2. The applied case that the gun gets makes an enterprise do not have bed of appropriative gun borer as a result of this tradition, set out from economic benefits angle, transform the effect that should have had already, want benefit again old, so whole gun gets a system to must build the base that using existing boring machine and lathe, and the fabricating characteristics that the application of this system cannot destroy primary machine tool. Via analysing contrast, final choice installs a gun to get a system on one average boring machine. 2.

The setup that 1 gun gets a system and try cutting (1) main tool: Clip of handle of Mo Shi awl holds sleeve [1] (see next tables 1) , ; Speed ratio is 1:3.

The main shaft of 81 is added fast implement 1. Express clip of 1 handle of Mo Shi awl to hold sleeve Normal Align=center>nnecttype="rect" Gradientshapeok="t" O:eXtrusionok="f">normal Align=center>normal Align=center>normal Align=center>normal Align=center>normal Align=center> cutting rotates type Normal Align=center>D1(mm)normal Align=center>25normal Align=center>L2(mm)normal Align=center>50normal Align=center>D2(mm)normal Align=center>45.

97normal Align=center>L1(mm)normal Align=center>113.

03normal Align=center>L3(mm)normal Align=center>30.

99 (2) try cut an object, all move qualitative steel for 45# , HB230 ～ the axis of 260 kind spare parts. (3) cutting means, use workpiece to secure, the means that cutting tool rotates. (4) the option that the gun gets kind of shoulder of the axis that prop up, the timber that cuts an object according to trying is qualitative, the R that chose two groups of different length 1 model gun getting: One group is φ the broach of 10 4 (cent is 300, 600, 900, 1200mm4 class) ; Another group is φ the broach of 11 3 (cent is 400, 800, 900, 1200mm3 class) . (5) the choice of parameter of the geometry that get a tip. Gun getting is gotten cut main decision at outside outside blade horn φ , inside the eccentric throw that gets a tip is reached inside blade horn φ . The horn that get a tip 2 φ [° of 2 φ =180 - (outside φ + inside φ ) ] , generally speaking harder data needs to use the minor part that get a tip, weaker data needs to use the larger part that get a tip, no matter get pointed point of view how, blade horn is mixed outside inside of blade horn choose must assure broach to be mixed in the radial component of force when cutting advocate the action with cutting can reasonable force is on the area propping up of broach, so that have the effect to surface of the aperture that press light. The nodical position of cutting blade is apart from broach center to be 1/4 diameter commonly. According to hard alloy gun getting gets equilibrium analysis, cutting force is equal to radial of the blade outside the requirement inside force of blade radial cutting, but in machining a process actually assure very hard. To avoid bore prejudicial, cutting force is more than radial of the blade outside having only inside force of blade radial cutting, ability makes radial join forces from beginning to end action at work surface [3] . Then, use at treatment commonly cast-iron with the =20[2] inside the =30 outside φ of horn of the blade outside be being taken when common rolled steel, φ , if pursue,4 are shown. </DIV>(6) the treatment that guides aperture, part on two kinds of workpiece prefab one precision is φ 10, φ 11, deepness is 5mm respectively, 5.

The guiding of 5mm after aperture, machined φ respectively 10 × 1165mm (300, 600, 900, 1200mm4 class) , 11 × of φ 1150mm (400, 800, 1200mm3 class) deep aperture. (7) cutting fluid, use with tall " EP " cooling fluid of oil radical water-solubility, pressure 6 ～ 8Bar. (8) cutting parameter, broach enters Kong Qian completely, rotate speed coming back spends V=30m/min, feed speed F=0.

02mm/r; After broach enters hole completely, rotate speed coming back spends V=45m/min, feed speed F=0.

04mm/r. (9) cutting classifications, to assure bore diameter precision, must make drill pipe props up distance and drill pipe diameter to compare do not be more than 45[4] , beat take every to get cut deepness to amount to a diameter 30 times when for one class, when actual cutting, every class settling time is controlled 3 minutes for 1 ～ , time of every class cutting 6 ～ 10 minutes. The test is very successful, cutting is light, smooth, cooling and sufficient, cut bits to show silvery white, short helix curly (see a picture 5) , eduction is successful, the result is favorable. Undertake as the development that tries cutting, gained a few practical experience stage by stage, detect and the record undertook summing up, contrast receive long twist drill, be as follows parameter contrasts watch 2. The main parameter that expresses 2 twist drill, gun to drill treatment hole contrasts watch Normal MARGIN of Auto" Align=center> name: 0cm 0cm 0pt; TEXT-INDENT: 15.

1pt; TEXT-ALIGN: Center; Mso-char-indent-count: 1.

67; Mso-pagination: Widow-orphan; Mso-margin-top-alt: Auto; Mso-margin-bottom-alt: Normal Align=center> twist drill: 0cm 0cm 0pt; TEXT-INDENT: 15.

1pt; TEXT-ALIGN: Center; Mso-char-indent-count: 1.

67; Mso-pagination: Widow-orphan; Mso-margin-top-alt: Auto; Mso-margin-bottom-alt: Auto" Align=center> gun gets Normal MARGIN of surface roughness of Widow-orphan" Align=left> surface: 0cm 0cm 0pt; TEXT-INDENT: 15.