The method of turning multi-line whorl

4mm is wide. Be over when the car after chamfer of the first helix, let lathe tool rely on certain flank, should choose to arrange the flank of knife direction commonly. Roll is small procrastinate board axial is mobile a Zhou Jie (or pitch) add 0.

The precision surplus that 2mm controls, measure a that tooth top that goes against knife direction namely wide it is about 2.

8 ～ 3.

2mm, namely the tooth top of the first corkscrewed yarn asks at dimension wide, begin thick car next chamfer of the 2nd helix, till the measure with chamfer of the first helix is basic equal. Single shot contrast measures sheet of half fine vehicle it is thick that needle contrast is measured the important segment before vehicle of car hind, fine. "Comparative " use single shot to measure each helix chamfer respectively namely, that chamfer with greater measured value is opposite narrower. Vernier calipers of reoccupy transverse tooth thickness measures two transverse tooth thickness that give neighbour of photograph of this chamfer place, finding out that tooth flank with its greater measured value is the range that wants turning, till measured value error is reduced, namely each chamfer ages each agree basically. When the fine vehicle of multi-line whorl is planning fine vehicle separately, right first car certain flank should choose somewhat. If random begins fine vehicle from a flank, and this lateral surplus is larger also. When the exterior surface roughness that asks this side car to design place, it is to go generally speaking fine vehicle the same flank of another helix chamfer, is not to continue car former flank. Such doing can appear sometimes such problem: Move accurately when lathe tool a Zhou Jie (or pitch) go car when another flank, this flank does not have surplus or discovering however is a car a few knives, flank has not achieve its surface surface roughness to ask to come with respect to the car dimension. Be the surplus that leaves when thick car, half fine vehicle little? Either. Very apparent, it is face of a side the surplus that leaves when turning is too much and those who cause trough of the 2nd whorl is same a flank surplus is small, or without surplus. Such must already the flank of fine vehicle again fine vehicle, caused needless on the operation repetition, affected the efficiency of turning, caused separately the time is much, the chance of occurrence error is much also. So, how to reduce an error, improve efficiency, achieve precision to ask to become the main contradiction of turning multi-line whorl. Because do not have surplus and surplus,the occurrence that above place talks about a problem is not lesser and bring about, when beginning fine vehicle however, cause to which flank did not choose the vehicle or choosing a mistake first. Accordingly, before fine vehicle, answer first which flank chooses the vehicle somewhat. Before fine vehicle, use single shot contrast to measure likewise, find out two chamfer which measured value is lesser, criterion this chamfer is wider. Callipers of reoccupy transverse tooth thickness measures two transverse tooth thickness of adjacent of photograph of this chamfer place, see which measured value lesser, vehicle of again certain spirit flank begins from which. If of groove on the right side of tooth form ply is narrower, that should choose right side to regard essence of life as the one side of the car, what regard essence of life as the car namely is fiducial. Pass comparative alternative so, it is the beginning that chose a tooth with opposite less surplus flank to regard essence of life as the car actually. Good vehicle of fine of this tooth flank (exterior surface roughness achieves a requirement can) , reentry goes accurately separately all right car the same flank of another helix chamfer, won't appear so the problem with insufficient surplus. Good when fine vehicle after the first tooth flank, should undertake accurate separately in order to assure workpiece pitch (or Zhou Jie) correct. What teaching material place tells is circumferential can carry out separately with axial separately, but also should choose which kind of methods certainly according to the particular case of field and condition. In exercitation education, I use dial gauge surveillance is small procrastinate board separately. Such advantage is: Intuitionistic, accurate, operation is convenient, can assure taller separately precision. In the car the course when the 2nd flank is exact separately, the axial position of lathe tool is firm already, as long as ordinal in deepening, procrastinate board feed deepness comes turning scale of the first lateral (namely whorl trail) , obtained precision of the 2nd tooth identical lateral. Pass namely accurate separately, axial position is firm, radial position is in the scale when turning of face of a side is changeless the same flank that assured two helix chamfer, namely the accuracy of pitch. At this moment, OK car of essence of life is same the another flank of tooth chamfer. The needle that use sheet or callipers of transverse tooth thickness are measured in order to assure transverse tooth thickness or in diameter dimension accords with design requirement, go again accurately separately car the same flank of another helix chamfer. Finished the fine vehicle job of bull whorl so. Above place talks to see not hard, it is thick car no matter, still be fine vehicle, should choose a flank to be mixed as turning above all measure fiducial, and another flank becomes surplus. The precision of multi-line whorl is measured and the error amends multi-line whorl besides wanting to measure big, medium, trail with common thread, even right its separately precision (pitch precision) undertake accurate measurement is mixed amend, this also is one of main technique index of multi-line whorl. The screw that waits for pitch as echelon whorl separately error relatively congress causes tine to close gap ignore big ignore small, affect the transmission precision of worm, worm wheel. How be measured and be how be measured and amended? Its measurement technique is: Measure a way above all to transverse tooth thickness. If measure two ways to transverse tooth thickness basic and equal, remember next its laws respectively the numerical value to transverse tooth thickness, measure the method that includes these two a tooth-like part of anything again to transverse tooth thickness (namely the law of two tine is mixed to transverse tooth thickness) of width of chamfer of a helix, after writing down this next measured value, again forward or move backward a law to transverse tooth thickness, measure a way again to transverse tooth thickness, compare metrical result twice, gotten measured value error is separately error. Can see, measure twice contain two identical flute profile, the its law value to transverse tooth thickness is changeless. But measure included slot twice different however, because changed chamfer of a helix every time, the outcome that measures twice so is different, at this moment, we need not consider the operation error when measuring. Explain chamfer of a helix is wider, and another helix chamfer is narrower. To transverse tooth thickness in two corkscrewed yarn laws equal circumstance falls, two pitch that form lead (or Zhou Jie) completely not equal. The way that its settle uses single shot likewise farther contrast measures two helix chamfer, look which measured value is greater, explain which chamfer is narrower. Measure two transverse tooth thickness of adjacent of its place photograph again, find out that flute profile with its greater measured value, so, what that flank of this chamfer needs amendatory range namely. May appear sometimes the measured value of two chamfer is equal, measured value of transverse tooth thickness differs however, the specification is measured what two chamfer place places that intermediate flute profile is thicker, should revise two aspect of this flute profile so. Transverse tooth thickness is equal, groove is wide differ, should amend narrow two flank of groove. Hypothesis surplus still has 0.

2mm should deuce it on two flank. Two such transverse tooth thickness are decreased at the same time thin, still maintain identical ply, pitch error also was eliminated. Anyhow, doing when be being amended finally, should mix according to the transverse tooth thickness of every corkscrewed yarn groove is wide will choose to amend the position. Although did not do the feed of radial, axial,the cutting power influence to whorl precision often can discover in cutting process, but bits still can be cut when turning repeatedly, this cuts the action of bits force namely. In turning when the whorl of bigger pitch, the effect of cutting force is more apparent. Because cutting force can increase the reason that increases accordingly along with cutting area,this is. So, in time of turning multi-line whorl the head should notice: Turning is accomplished when the first flank reduce cutting force and remove cutting force, namely when the car achieves a requirement basically to dimension and exterior surface roughness, diameter, axial does feed to move no longer, just relapse turning (take a knife for nothing) till little cutting is mixed not till cutting. Such doing made sure lathe tool is in already axial and radial proper place, regained the dormant position of workpiece and cutting tool again, assure further thereby and raised the validity of workpiece tooth horn. At this moment, reentry travel is accurate separately, determine axial position. Turning the same flank of chamfer of the 2nd helix, do radial feed only, the car comes remove cutting force till. Conversely, if car of the first side comes,remove cutting force and car of the 2nd side still is in to dimension cutting retreats a knife, although be correct separately, but the pitch when measuring may appear error, this is the error that cutting force place produces. Eliminate the error that cutting force place causes only, ability assures dimension, appearance, position and exterior precision, raise the integral precision of the spare parts thereby. CNC Milling