A Temperature Compensation System for CNC Machine Tool
A temperature compensation, CNC machine tool technology, applied in the field of CNC machine tools, can solve the problems of no pre-installed temperature sensor and difficult temperature data acquisition, and achieve the effect of reducing labor costs and improving machining accuracy
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Embodiment 1
[0024] refer to figure 1 , a temperature compensation system for a numerically controlled machine tool proposed by the present invention, comprising: a temperature difference calculation module, a deformation calculation module and a motion output module.
[0025] The temperature difference calculation model is preset in the temperature difference calculation module, and the temperature difference calculation model is:
[0026] Among them, T i is the current temperature difference, T i-1 is the temperature difference at the latest speed change of the moving shaft, V i is the current movement speed of the movement axis, V i-1 is the movement speed of the movement axis before the latest speed change, and Δt is the movement time at the current movement speed;
[0027] When V i >V i-1 , G(V i )>1, specifically, G(V i ) = V i / (V i -V i-1 ); when V i i-1 , 0i )i ) = (V i-1 -V i ) / V i-1 .
[0028] f(Δt)=k×Δt, k is a calculation constant, and is a positive number, a...
Embodiment 2
[0039]The difference between this embodiment and Embodiment 1 is that there is no preset deformation calculation model in the deformation calculation module. In this embodiment, a deformation temperature difference mapping set is preset in the deformation calculation module, and the deformation temperature difference mapping set includes a plurality of subsets, and each subset includes a temperature difference value and a deformation value. The deformation calculation module obtains the corresponding deformation value according to the current temperature difference as the deformation amount of the target motion axis.
[0040] In this embodiment, the corresponding relationship between the temperature difference value and the deformation value can be obtained through experimental measurement. Compared with Embodiment 1, this embodiment needs to consume a lot of manpower and time costs in the early stage to collect and arrange deformation temperature difference mapping sets, but,...
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Description
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Application Information
- IPC
- G05B19/404
- CPC
- G05B19/404; G05B2219/37509
- Inventors
- 毛益飞; 杨纪村