Fig.1

Schematic diagram of deflection adaptive control scheme

Fig.2

Adaptive auxiliary support fixture

Fig.3

Simulation area division

Fig.4

Overall elastic deflection trend

Fig.5

Auxiliary support unit

Fig.6

Schematic diagram of casing clamp positioning

Fig.7

Target area segmentation

Table 1

Key geometrical parameters of engine casing mock-up

Table 2

Allowances for each milling process

Fig.8

Simulation results without auxiliary support

Fig.9

Simulation results for applying fixed support force

Fig.10

Milling path and milling node division

Fig.11

Comparison of elastic deflection with and without auxiliary support

Fig.12

Effect of different fixed support forces on elastic deflection under the same milling path

Fig.13

Elastic deflection of a single node under different fixed support forces

Table 3

Optimal support force for each milling node

Fig.14

Support force control curves for different milling paths

Fig.15

Elastic deflection of different milling paths without auxiliary support

Fig.16

Elastic deflection under active control of support force for different milling paths

Fig.17

Comparison of on-machine measurement data and simulation data

Fig.18

Updated support force control curves

Fig.19

Installation site of adaptive auxiliary support fixture

Fig.20

Processing area division

Table 4

Milling operation within process

Fig.21

Flowchart for casing machining control incorporating adaptive auxiliary fixtures

Fig.22

On-machine measurement path

Fig.23

Comparison of on-machine measurement results

Fig.24

Comparison chart of elastic deflection with active control of in-process support forces

Fig.25

Comparison of on-machine measurement results incorporating in-process and inter-process support force compensation

Fig.26

Comparison chart of elastic deflection with in-process and inter-process support force compensation

Fig.27

Comparison of elastic deflection trends in finishing processes