Discussion circuitry board the mill technology of numerical control milling machine
Next the construction that the mill technology of milling machine of circuit board numerical control includes to choose method of knife direction, compensation, location method, frame, knives are nodded. It is the important facet that makes sure mill machines precision.
Walk along method of knife direction, compensation
When milling cutter cuts plank, have by the cutting blade that cutting face always is prep against milling cutter, and the cutting blade that always going against milling cutter additionally at the same time. Former, be machined the face is bright and clean, dimension precision is tall. Main shaft always is clockwise roll. It is main shaft no matter so fixed workbench moves or be workbench the numerical control milling machine that fixed main shaft moves, when the exterior outline of mill printed board, want to use anticlockwise direction to take a knife. What this says normally namely go against mill. And circuit board interior uses suitable mill means when mill casing or chamfer. Mill board compensation is to be in how does bed of mill board opportunity illuminate set value automatically to make milling cutter automatic the half of the milling cutter diameter of the set of central deflection place with mill tangent road, namely radius distance, the appearance that makes mill is cut and program set keep consistent. If the machine tool has compensatory function to need,note compensatory direction and the order of use program at the same time, if use compensation order,wrong meeting makes the appearance of circuit board is equivalent to the dimension of the length of milling cutter diameter and width much or less.
Locate the method is nodded with next knives
Location method can be divided it is two kinds; It is decided at the higher level but not officially announced, 2 be outside fixed position. It is very important also that fixed position makes staff to craft, should define the program of fixed position when road board early days makes the line commonly.
Fixed position is current method inside. Alleged decided at the higher level but not officially announced it is the installing hole inside choice printed board, insert batch of aperture or other is metalloid change aperture to regard fixed position as aperture. The relative position do one's best of aperture is on diagonal and pick the hole of big diameter as far as possible. Cannot use plated through hole. Because of the film inside aperture the difference of ply can affect the consistency that you pick fixed position hole, taking at the same time board when cause the with aperture surface brim film damage inside aperture very easily, below the condition that makes sure printed board locates, pin amount has healed less more. General small board use 2 pin, big board use 3 pin, its advantage is fixed position accurate, board the appearance is out of shape small accuracy tall appearance is good, mill cuts rate fast. Its defect board inside all sorts of bore diameter sort need to have more neat the pin of all sorts of diameters, be like board inside without aperture of practicable fixed position, when in advance is made need and client are discussed in board inside increase fixed position opening relatively, relatively loaded down with trivial details. At the same time avery kind of board mill board pattern plate is different management is relatively troublesome, cost is higher.
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