Thermal Distortion Compensation Method
A compensation method and thermal deformation technology, applied in the direction of metal processing equipment, maintenance and safety accessories, metal processing machinery parts, etc., can solve the problems of time-consuming, interference, and complexity in measurement and adjustment, and achieve the effect of processing quality and efficiency
Active Publication Date: 2019-10-08
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology
At present, the usual method is to use multiple measurements to take the average value, which is time-consuming and complicated in the process of measurement and adjustment, and has high requirements for the operator, and the measurement is greatly disturbed by the outside world, resulting in the measurement accuracy being affected. influences
[0004] Other similar thermally deformed rods on the machine tool (such as the spindle and the guide rail of the machine tool) may also generate thermal expansion due to the heat of the motor, thus affecting the accuracy of data processing
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[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0031] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be unders...
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The invention provides a thermal deformation compensation method. The thermal deformation compensation method comprises the steps that the thermal displacement of at least two axial positions on a rod-shaped object at two or more different temperatures is obtained; the thermal expansion zero point is determined according to the thermal displacement of the at least two axial positions on the rod-shaped object at the two or more different temperatures, and is the position where the approximate linear relation exists between the temperature variable quantity and the thermal displacement of the rod-shaped object; the thermal displacement of the thermal expansion zero point under the specific temperature variable quantity is determined; the error compensation quantity of the rod-shaped object is determined according to the thermal displacement of the thermal expansion zero point under the specific temperature variable quantity; and thermal deformation of the rod-shaped object is compensatedaccording to the error compensation quantity.
Description
technical field [0001] The present invention generally relates to the technical field of numerical control machining, and more specifically relates to a thermal deformation compensation method for compensating the thermal deformation of a rod on a machine tool and a corresponding device for realizing the method. Background technique [0002] In CNC machining, the transmission of the lead screw is usually used to drive the spindle and the worktable to move. The screw rod is generally connected with the motor, and the motor drives the transmission of the screw rod. Since the lead screw is a slender rod, it is significantly affected by temperature. The heating of the motor will cause the screw rod to expand and produce elongation, which will cause the position of data processing (for example, the tool point, etc.) to deviate from the predetermined position. [0003] In order to improve the positioning accuracy of the screw drive, error compensation is usually used. The error...
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IPC IPC(8): B23Q11/00
Inventor 刘宏伟向华陈吉红
Owner HUAZHONG UNIV OF SCI & TECH