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| Boring and milling machine with the structure and characteristics |
The structure of the milling and boring and characteristics
n case a part. When is represented with long hole, is fine metal cutting in one of the most important content. Although there are still using boring, milling and boring, desktop bushing after long boring stem or supporting pillar of artificial is turning workpiece 180 ° method of implementation of long fine holes, but in recent years, on the one hand, because of nc milling and boring and milling center, make extensive use of horizontal milling and boring coordinate location accuracy and precision worktable rotation degree has increased greatly, long fine holes is gradually efficient workbench rotary 180 ° of another form turns bore the ordinary or CNC lathe bed layout of planer desktop milling and boring machine, production and application from the structure that rotary worktable of 180 ° turns in the almost become, boring holes on the machine series. The only way to long
Second, turn into the coaxial tolerance of error and boring
Milling and boring affect the coaxial tolerance of the main array boring and milling and boring desktop, also be the rotary worktable 180 ° turns degree error da and to make turns into half before boring holes in the long axis, after turn d1 again and boring axis superposition of long and boring cut half hole d2, the workbench (x) to move Lx = 2lx (figure 1) positioning error dx2. But turning around 180 ° worktable, mesa xy plane coordinates in the Angle error, yz in-plane df of Angle error dy to produce and y translation errors dy, is also the planer desktop milling and boring u-turn bore the important factors influencing the coaxial tolerance. But the boring axis space position, turn to the coaxial tolerance, boring, usually send into complete with column length of 1ta dig holes, and usually milling and boring desktop with longitudinal to enter the worktable milling and boring desktop is obviously different.
Third, boring axis vertical position when the column into the reasonable and affirmatory
When met specific case, milling and boring must put on fixed in the vertical column bed of a suitable location, and with boring axis with the boring cutter out into a form, boring axis and was boring axis in the name of the in-plane xz intersect error db, in the in-plane yz, and desktop intersect error dg milling and boring, turn to the coaxial tolerance of boring have important influence, and along with the boring axis, send into the length of the boring boring axis self-respect, flexible deformation under the rod to turn the coaxial tolerance of boring. And the desktop milling and boring, planing of milling and boring desktop boring axis, stretch boring longitudinal mobile column in a fixed bed must be determined on a vertical position, and this is an important position can be determined and should be choose.
Four, milling and boring cutter location is reasonable and affirmatory
In milling and boring by post, turn into boring clamping boring axis in the knife knife, &boring pole to the reasonable position along the Z, on one hand we should meet to tip rotation center distance slightly in front of the spindle box than half (full-length hole hole not long again teenager is too boring, boring axis stiffness fell), On the other hand also satisfy the tool tip rotation center, boring axis and the pillar of the line intersection of longitudinal move on O, etc. |
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