Measure with computation

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When the measurement that 1 essence grinds taper hole diameter processes the taper hole work with more expensive precision on round grinder inside, measure with taper plug guage commonly inside aperture taper and main aspects diameter. But treatment internal diameter is when 100mm above, and exterior surface roughness also asks very tall, can cause measure the difficulty that go up, can appear the following problem: Because taper diameter is big, the weight of taper compasses also increases, grind the plug guage when measuring taper sinks, master a balance not easily with the hand, cause place to measure taper not accurate; When taper compasses is measured, press workpiece face easily, influence quality. Use the measurement technique that shows like graph 10-1 place, with respect to can better settlement this one problem. When batch is produced, make the standard component that accords with blueprint requirement completely first, with this pair the watch measures the work with same other. When measuring, stick fixed position lever on workpiece end panel first, the around that use a hand swings gently watch lever, the least value that makes the watch mirrors instead is taper hole place measures a diameter. Can give the real measure of a treatment quite so, till treatment finished product. The gear of indirect measurement oil pump of external diameter of 2 odd gear is odd, demand of precision of external diameter dimension is higher, when grinding external diameter, it is relatively difficult to measure. Measure an issue definitely for solution, use the method of the indirect measurement that shows like graph 10-5 place, simple and intuitionistic, master easily. When measuring, in micrometer anvil overlay the one auxiliary mat with one appearance and ply dimension tall precision, the ply of this mat is integer, can measure. Real measure is equal to the external diameter of gear of micrometer measure reading is subtractively spacer ply. Notable problem is the production precision of auxiliary mat, must accord with a requirement, its inside circular arc R must be mixed dimension of nominal of gear external diameter is equal. Spacer ply had better be integral, lest calculative is troublesome. Essence of 3 plug guage measures alveolus diameter to machine a few precision to ask taller small inside Kong Shi, be in without appropriate measurement when the tool, machine medium aperture for control, can make place of a 10-6 that be like a graph show taper 1:5Of 0 inside aperture plug guage, will measure small diameter straight aperture. The diameter that needs opening on plug guage is in engrave 0 lines, ordinal cut 1mm length toward small end 1 case, plug guage enters 1mm inside past aperture, the diameter of aperture with respect to expand into 0.

02mm. If measure the end panel that gives workpiece opening,to plug guage 0 lines differ 15mm, at this moment Kong Xiao 0.

3mm. OK and effective control cutting deepness, assure product quality. Check provides 4 aperture symmetry the Kong Duo of arbor jacket knife is square aperture, to satisfy the need that float boring cutter installs, tall to requirement of precision of the dimension of aperture of arbor upper part, appearance outside, still ask to the positional precision of aperture as much tall. Can use common measuring tool to measure to dimension and appearance precision, no-go to the measurement of positional precision. For this, made the tool that shows like graph 10-8 place with respect to the design, solved this one problem. When the examination, preexistence U form piece outfit of one aspect of the matter is expressed 100 minutes, another end inserts square aperture inside, and around is mobile, note the indication on next watches, retroflexion arbor next 180 ° , the method with same reoccupy is measured, the difference of the value that measures twice, it is to need treatment capacity namely. This U form piece, can make it is adjustable, do not examine in order to suit with the arbor of size. 5 in begging the method that cuts round of diameter to be repaired in machinery, often encounter be less than semicircular destroy round of in kind, should machine new annulus, must calculate round of original diameter. Reached in practice seek the formula that defeats round of diameter simple and accurately, see graph 10-9. Exemple of ED (1)AB=AECE+ED (2) of × of AE × EB=CE: Foregone CD=50mm, AE=10mm, seek diametical AB solution: ∵ E=ED=0.

5CD=25=25mm takes the place of datum into type (1) get × of 10 × EB=25 25 EB=62.

5mm criterion AB=10+62.

5=72.

5mm answers: Broken annulus external diameter is 72.

The approximate calculation of big circular arc of 56 small milling cutter machines big diameter circular arc with small diameter milling cutter, must calculate the angle that milling head should tilt. Use to facilitate, recommend a kind of approximate calculation now, formula is the A in Sina=d/D type -- the angle that establishs milling head to should be pulled (° ) ; D -- milling cutter diameter (Mm) ; D -- by diameter of treatment workpiece circular arc (Mm) . Exemple: Milling cutter diameter is 110mm, r of circular arc radius is 115.

4mm, beg establish a head how to many degrees should pull? Solution by on formula gets Sina=d/2 × R=110/230.

8=0.

4766 answer: Establish milling head to should pull 28 ° 28 ′ this shows, should establish milling head to pull only turn 28 ° 28 ′ , the milling cutter treatment that can use ψ 110mm gives R=115.

The circular arc inside 4mm. Use face of the circular arc inside milling of this kind of method, can shorten greatly knife head extends length, its calculation method is very simple also. CNC Milling CNC Machining