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Synchron mirror milling

IP.com Disclosure Number: IPCOM000237460D
Publication Date: 2014-Jun-18
Document File: 2 page(s) / 89K

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09741: IP.COM

Abstract

1. ABSTRACT
Milling of thin-walled, mostly symmetrical, complex and large structures, e.g. frames taken from either Aluminium or Titanium plate or from forging semi-finished starting stock.

Current technology is to carry out milling of frames on conventional milling centers with a single spindle side by side. This practice encompasses that after rough milling (pocketing) of one side naturally the part distorts significantly due to the unsymmetrical one-sided material removal to a bowed structure. Milling of the mirror plane is carried out in a second operation after turning and re-positioning on the machine bed. This intermediate condition is brought into plane with considerable forces, which is not good for the material nor for the final product. Internal stresses are frozen into the part by this practice, which can lead to out-of-tolerance parts causing concession.

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Page 01 of 2


1. ABSTRACT

Milling of thin-walled, mostly symmetrical, complex and large structures, e.g. frames taken from either Aluminium or Titanium plate or from forging semi-finished starting stock.

Current technology is to carry out milling of frames on conventional milling centers with a single spindle side by side. This practice encompasses that after rough milling (pocketing) of one side naturally the part distorts significantly due to the unsymmetrical one-sided material removal to a bowed structure. Milling of the mirror plane is carried out in a second operation after turning and re-positioning on the machine bed. This intermediate condition is brought into plane with considerable forces, which is not good for the material nor for the final product. Internal stresses are frozen into the part by this practice, which can lead to out-of-tolerance parts causing concession.


2. DISCLOSURE

With the practice of synchronal mirror milling the part is milled in one single operation by aid of two spindles operating synchronically (see Fig. 1). Besides the reduction in operation time it provides the advantage that the milling forces are counterbalanced and partly eliminated leading to less fixation effort and none the less internal stresses to be frozen into the final part. It is anticipated that the resultant part provides a much advantageous state of internal stresses balanced over the cross section and a lower absolute value than a part machined on conventional single-spind...