Deep hole gun drill machining straightness error prediction and control method
A technology of straightness error and control method, which is applied in metal processing, boring/drilling, automatic control devices, etc., and can solve the problems of not considering the axial thrust and the inconsistency of actual processing, etc.
Pending Publication Date: 2021-01-15
YANCHENG INST OF TECH
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3) Sakuma et al. also considered the influence of the guide bush and the intermediate support gap on the straight limit error, but did not consider the influence of the axial thrust, that is, the hole deviation completely depends on the geometric parameters of the tool
6) Deng et al studied the straightness error model caused by the gap between the drill sleeve and the intermediate support in the gun drilling process, but their research is limited to the single support gun drilling system, which is not consistent with the actual processing
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[0077] The present invention will be described in more detail below with reference to schematic diagrams, wherein preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as the broad knowledge of those skilled in the art, but not as a limitation of the present invention.
[0078] 1. Modeling process of straightness error prediction model
[0079] Based on the Euler-Bernoulli beam theory, for any point on the drill pipe, the bending moment model based on the support spacing, drilling axial force and support clearance, and the corresponding boundary conditions of the bending moment model are established, and finally the bending moment model is carried out Linearize the solution to obtain a straightness error prediction model. That is, based ...
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The invention provides a deep hole gun drill machining straightness error prediction and control method. The method comprises the steps of building a multi-support three-stage deep hole gun drill machining straightness error prediction model through applying the Euler-Bernoulli beam theory, and carrying out the test verification; analyzing the influence of changes of a guide sleeve gap, a supporting gap and a drilling axial force on the straightness error through the straightness error prediction model. The method for achieving active control over the straightness error of a machined hole by changing the gap quantity of a supporting piece close to a workpiece is provided, so that the straightness error is reduced.
Description
technical field [0001] The invention belongs to the technical field of straightness control of deep holes, in particular to a method for predicting and controlling straightness errors in deep hole gun drilling. Background technique [0002] At present, in the national key development industries such as aerospace, weapon equipment, and automobile manufacturing, there are more and more demands for small-diameter deep hole processing, especially for titanium alloy materials, such as various cabins in the C919 large aircraft. Hole processing of door shaft guide rail. Gun drilling is an important technical means to realize deep hole processing. However, due to the small diameter and long hole depth of the processed hole, the structure of the gun drill is relatively complex, and the relative rigidity is weak, there is a common problem that the straightness error of the processed hole is large. Straightness is an important technical index in deep hole processing. Due to the part...
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Login to View More IPC IPC(8): B23B41/02B23Q15/00B23Q15/007
CPCB23B41/02B23Q15/00B23Q15/007
Inventor 李亮梁华朱奔驰
Owner YANCHENG INST OF TECH