The new method of turning taper seat
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70x(D-d)/L, or A ≈ 28.
7 ° K(shows) 2 times like the graph. Next, the numerical value that presses computational earning is checked so that angle counts from inside trigonometric function watch, the horny degree that gets in order to check again is a basis, adjust (rotational) of lathe small procrastinate board undertake turning. Still must use conic plug guage for many times in turning process or conic a compasses will examine the osculatory circumstance of workpiece taper seat, repeatedly corrective small procrastinate board rotational angle, until accord with a requirement till. Computation of this kind of traditional method is trival, corrective small procrastinate board difficult, and n is low. 2 adjust small procrastinate board new method one from above analytic circumstance is knowable, because of lathe in procrastinate board on the surface (installation is small pull board place) scale is to spend, and the conic bevel of workpiece " it is however with cent, second metric, because this makes lathe and workpiece both,the precision between differs 100 thousand times (1 ° =60'=3600 ") . This is to use lathe small procrastinate board the main reason that the precision when turning is conic assures hard. Now we for the moment the conic part workpiece (sectional) decompose become a rectangle and two right-angled triangles (the 3) that be like a graph. Graph 3 in AC and the clip solution that AB fashions. , namely the conic bevel A of conic part in workpiece. Bevel edge AB namely the exterior element line of cone, it is turning the feed contrail when conic surface. Advance when the point of a knife of lathe tool when the distance of B, still must the distance of A of corresponding ground displacement. Such, the tangent in forming a right-angled triangle with respect to apparent ground (Alb =tana) concerned. Graph 4 graphs 5 move to ensure knife point of a knife presses afore-mentioned feed contrail, the tangential relationship that we can use afore-mentioned right-angled triangles will adjust (rotational) small procrastinate board. The method is, the dial gauge that finds a place for one has electromagnetism attraction above the lathe bed slideway of preexistence lathe, and dial gauge measure a head to touch small procrastinate board side (4) seeing a picture, will sneak away next board fore-and-aft shift pursues 3 in when the distance of B, nominal roll is small procrastinate board make dial gauge appears graph 3 in the numerical value of A. The tangent that handles trigonometric function so (A/b=tana) concerns, decided turning is conic when the taper seat of bevel angle A small procrastinate board the angle that should turn. For example, draft turning a workpiece with 4 conic Mohs. When adjusting, need only small procrastinate board bottom close solid screw cap is loose, in the dial gauge that finds a place for one has electromagnetism attraction above lathe bed slideway, and dial gauge measure a head to touch small procrastinate board side (if pursue,show) 4 times. Will sneak away then board fore-and-aft and mobile 100mm(pursues namely 3 in the distance) of B, nominal roll is small procrastinate board, make dial gauge appears 2.
The reading of 60mm (pursue namely 3 in the numerical value of A, can be in watch 1 in check) , this is turning before 4 Mohs are conic small procrastinate board the proper point of view that should turn. Screw next small procrastinate board bottom close solid screw cap, again mobile finally smooth board check, avoid midway happening error. The main aspects diameter that needs to press workpiece only when turning or small end diameter (decide by the particular case of the requirement in producing blueprint) turning can. Adjust with this kind of method small procrastinate board turning is conic, can dispense with any computation, also do not need to check trigonometric function watch, skilled worker is adjusted small procrastinate board need to spend ten seconds to plant only time, do not need to use conic plug guage in turning process or conic a compasses will examine the conic circumstance of workpiece, also avoided to relapse corrective small procrastinate board the trouble of rotational angle. The work that the car becomes is conic precision is very tall (the exterior besmear that uses conic measure shows the agent is checked, interface can achieve 95% above) . What make lathe to facilitate handlers is moved is small procrastinate board, according to all sorts of round taper the tangent in conic bevel (A/b=tana) concerns, make shift sneak away board the length that is 100mm (b) when, touch small procrastinate board the dial gauge reading of side (the numerical value of A) corresponding relation, rank is expressed 1 with the watch 2 in. Before expressing round awl of 1 turning Mohs small procrastinate board A/mm 0 2 of reading of dial gauge of number of name of A/mm of reading of dial gauge of number of rotational volume name.
60 4 2.
60 1 2.
49 5 2.
63 2 2.
50 6 2.
61 3 2.
51 7 2.
60 what adjust lathe by afore-mentioned methods is small procrastinate board when, dial gauge is in small procrastinate board distance of side displacement 100mm, can use smooth the dial on board hand axle will control, go to the lavatory already accurate. 3 new methods 2 if sneak away,are afore-mentioned dials on board hand axle, or as a result of other reason cannot make sneak away board well and truly mobile 100mm(pursues 3 in the distance of B) when, can convert shift is little procrastinate board will control. Express before 2 turning are general and conic small procrastinate board A/mm 1:2 of reading of dial gauge of K of round taper of A/mm of reading of dial gauge of K of rotational quantity round taper00 0.
25 1:10 5.
00 1:100 0.
50 7:64 5.
47 1:50 1.
00 1:86.
25 1:30 1.
67 1:77.
14 1:20 2.
50 1:510.
00 1:16 3.
13 1:4.
07 12.
28 1:15 3.
33 7:24 14.
58 1:12 4.
17 1:316.
67 methods are: Be in above all of lathe small procrastinate board above the dial gauge that finds a place for one has electromagnetism attraction, and dial gauge measure a head to touch tailstock covers the side face of the canister (if pursue,5 show) . Will sneak away then board make fore-and-aft shift examine tailstock sleeve whether as parallel as lathe bed slideway. Loosen next small procrastinate board bottom close solid screw cap, will small procrastinate board rotational and similar point of view, jolty small procrastinate board handle, can use small procrastinate board the dial control on screw is small procrastinate board well and truly mobile 100mm is apart from (if pursue 3 in the length) of B, make the graph appears in dial gauge 3 in A is numeric (can according to different round taper from the watch 1 or watch 2 in check) . Such, when what get turning appoints conic bevel A or round taper K quickly is conic, small procrastinate board the proper point of view that should turn, what can make the car is become is conic achieve likewise tall precision. From analysis of plane geometry angle, when small procrastinate board not rotational angle and when mobile 100mm is apart from, the line segment of length of this paragraph of 100mm is a graph 6 medium AC(pursue namely 3 in B) . But when small procrastinate board rotational. After angle, line segment of this paragraph of AC makes the AB' line segment on line segment of bevel edge AB with coincide of AB line segment. So, when small procrastinate board rotational. After angle, with shift small procrastinate board 100mm distance will replace smooth board mobile 100mm is apart from (graph the method of 3 medium B) , will adjust small procrastinate board rotational angle, whether can you affect a car to become conic precision? It is generally speaking won't. Graph 6 in the right-angled triangle, bevel edge always is more than adjacent edge (AB>AC namely of AB') . However, when A<1 ° 40' , cosa=AC/AB=1.
000(" ) of compendious mechanic manual, similarly hereinafter) , bevel edge AB and the length of the AC side adjacent are approximate and equal. Mohs is conic in, the bevel angle A with conic 0#-7# is to be in 1 ° of ～ of 1 ° 25'40 " ; average level is conic between 30'3" in, round taper K=1:200 ～ 1:25 kinds of of 0 conic bevel. It is to be between 25'56" of 0 ° 8'36 "-1 ° . Above 13 kinds conic in, the AC side their adjacent is equal to bevel edge AB approximately, move namely lathe is smooth board 100 Mm(pursues 6 medium AB) , as small as shift procrastinate board 100 Mm(pursues the B value that 6 medium AB') determine is approximate and equal, it is negligible to the influence of conic precision consequently. Average level is conic medium round taper K=1:16, 1:15, 1:12 with 1:14 kinds of 0 conic, their bevel angle A is to be in 2 ° of ～ of 1 ° 57'24 " between 51'45" , value of the others bowstring is 0.
999, AB ～ AC, because its error is extremely small,also can ignor. The others with average conic level 7 kinds, its bevel A increases gradually, consequently bevel edge and the poor value by the side of adjacent also increase subsequently. If its corresponding AB value expresses 3 to show: Express 3 round taper (length of K) bevel edge (AB)/mm 7:64 AB=100.
14 1:8AB=100.
20 1:7AB=100.
25 1:5AB=100.
50 1:1.
407AB=100.
76 7:24 AB=101.
06 1:3AB=101.
38 above 7 kinds of round taper, AB grows slightly than AC. Because this shift is little,procrastinate board the distance should press the AB value that expresses 3 kinds to undertake adjustment. 4 errors analysis and precautionary measures are being adjusted small procrastinate board when, smooth board move along lathe bed slideway, hold the work in the 3 ungual collet that are placed in lathe, the extension line that its center generatrix is line of center of lathe main shaft paragraph. The central generatrix of lathe main shaft and lathe bed slideway are so parallel, it is a factor that affects conic precision. If discover lathe main shaft and lathe bed slideway are not parallel (with smooth board the cylinder that feed car becomes appears conic phenomenon) , can adjusting small procrastinate board when proper increase and decrease touchs small procrastinate board the reading of the dial gauge of side, will because lathe main shaft and lathe bed slideway are rough,be corrected the error that go and arises. Lathe is small procrastinate board side is us those who use new method is important and fiducial (4) seeing a picture. Normally, small procrastinate board in making a process, its slideway face and side should install the treatment in clip to finish in, parallel is between them consequently. If small procrastinate board as a result of be used for a long time and damage, when be made afresh, must small procrastinate board slideway face and side install the treatment in clip to finish in, assure the parallel between them. Using the 2nd kind of new method to adjust small procrastinate board when, tailstock sleeve is to adjust small procrastinate board fiducial. Accordingly, should examine above all tailstock sleeve whether as parallel as lathe bed slideway. When examining, should make the tailstock of the alignment that measure a head of dial gauge covers the centre height of the canister, at the same time the axes line of dial gauge must cover the exterior generatrix phase of the canister with tailstock perpendicular. If discover tailstock sleeve and lathe bed slideway are not parallel, corrective method can be being adjusted likewise small procrastinate board when, appropriately the reading of the dial gauge that increase and decrease touchs tailstock covers canister side face. If because workpiece is longer, the tailstock device tip that needs to use lathe participates in those who hold clip, the position of tailstock (the horizontal radial position of workpiece) install correctly, also can affect the conic precision that the car becomes, examine as Alexandrine as corrective method. Graph 7 when turning round taper hole or cone, lathe tool must install the centre height in workpiece (namely the horizontal position of workpiece centre of turning circle) place. Carry out a proof, if lathe tool is installed on the high side or on the low side, the conic and inevitable meeting that the car becomes appears the exterior generatrix that the graph shows 7 times submits hyperbola form, small end diametical D increases become D ' , decrescent of conic bevel A becomes A' . The precision of the taper seat that becomes to assure a car and surface roughness accord with a requirement, the cutter hub of lathe tool must have enough tigidity (ask when turning round taper hole especially taller) . Cutting blade should hold sharp position from beginning to end, feed should even, must determine appropriate cutting rate at the same time, if do not have the exterior surface roughness that attains ideal, usable and fine emery cloth the conic surface of equably arenaceous smooth workpiece. CNC Milling