Thermal error compensation calculation method, device and equipment of machine tool, and storage medium
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A calculation method and technology of thermal error, applied in computer control, program control, instruments, etc., can solve problems such as inaccurate prediction and inaccurate model establishment.
Active Publication Date: 2020-05-08
SANMING UNIV
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[0003]
In view of the above problems, the object of the present invention is to provide a thermal error compensation calculation method, device, equipment and storage medium of a machine tool, which solves the problem that the widely used CNC vertical five-axis machining center is performing various milling, drilling and cutting operations. In complex and variable processing, the model cannot be established accurately, resulting in inaccurate predictions
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Embodiment 1
[0057] see figure 1 , the first embodiment of the present invention provides a thermal error compensation calculation method of a machine tool, which can be executed by the thermal error compensation calculation device of the machine tool, in particular, by one or more processors in the thermal error compensation calculation device of the machine tool to perform, and include at least the following steps:
[0058] S101. Obtain multiple physical parameters of compound cutting processing conditions; wherein each physical parameter includes at least two state quantities.
[0059] In this embodiment, the physical parameters include at least eight types, and each physical parameter includes at least two state quantities. Specifically, the physical parameters and physical states include: the processing state includes periodic processing and non-periodic processing state, etc.; Physical parameters of processing methods include face milling, end milling, and drilling; physical paramet...
no. 3 example
[0107] The third embodiment of the present invention also provides a thermal error compensation computing device for a machine tool, including a processor, a memory, and a computer program stored in the memory, and the computer program can be executed by the processor to achieve the above-mentioned The thermal error compensation calculation method of the machine tool described in the embodiment.
no. 4 example
[0109] A fourth embodiment of the present invention provides a computer-readable storage medium, the computer-readable storage medium includes a stored computer program, wherein, when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the following steps: The thermal error compensation calculation method of the above-mentioned machine tool.
[0110] Exemplarily, the computer program may be divided into one or more units, and the one or more units are stored in the memory and executed by the processor to implement the present invention. The one or more units may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in the thermal error compensation computing device of the machine tool.
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Abstract
The invention discloses a thermal error compensation calculation method, a thermal error compensation calculation device and thermal error compensation calculation equipment of a machine tool, and a storage medium. The thermal error compensation calculation method comprises the steps of: acquiring multiple physical parameters of composite cutting machining conditions, wherein each physical parameter comprises at least two state variables; calculating a state quantity combination of the physical parameters having the greatest influence on target parameters of the machine tool based on a Taguchiexperiment method; assigning the state quantity combination to the composite cutting machining conditions corresponding to the machine tool, so that the machine tool performs machining under the state quantity combination; acquiring temperature values and a thermal deformation amount after temperature and error synchronous measurement; grouping the temperature values by using a fuzzy C-mean clustering algorithm to obtain k temperature groups, and taking the center of each temperature group as a cluster temperature feature point; acquiring a kernel clustering factor based on the k cluster feature points and a rough set theory method; and establishing a linear regression thermal error compensation model based on the kernel clustering factor and the thermal deformation, and performing thermal error compensation calculation on the machine tool. The thermal error compensation calculation method, the thermal error compensation calculation device and the thermal error compensation calculation equipment improve the linear positioning and rotary positioning precision.
Description
technical field [0001] The invention relates to the technical field of equipment processing, in particular to a thermal error compensation calculation method, device, equipment and storage medium of a machine tool. Background technique [0002] When the CNC machine tool is running, the internal structure and mechanism will generate deformation errors due to heat generation. This thermal error accounts for more than 70% of the overall error ratio, which seriously affects the accuracy of the final workpiece. The main method to reduce the thermal error of the machine tool is to use thermal compensation. The current commercial practice is to use the built-in compensation device of the controller or an external compensation circuit board to measure the temperature value and deformation value in advance. Based on the simple mathematical regression model, establish Data table; in actual operation, read the data through the temperature sensor pasted on the surface of each mechanism ...
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