Device and method for rapidly detecting static rigidity of numerical control machine tool
A technology of numerical control machine tools and detection devices, which is applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., can solve the problems of time-consuming detection, and achieve the effect of simple device and time saving
Inactive Publication Date: 2015-03-04
UNIV OF SHANGHAI FOR SCI & TECH
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But this method has obvious shortcomings: first, this method only detects the static stiffness in the feed direction of the machine tool, and second, the detection of each direction has to go through steps such as reinstallation and re-inspection, and the detection is time-consuming
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[0010] The invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0011] Such as figure 1 , As shown in 2, a fast detection device for the static stiffness of a CNC machine tool consists of three parts: a base ball 1, a detection rod 11 and a cutter bar ball 9. The connection between the two steel balls and the detection rod is contacted by the inscribed surface of the high-precision conical surface. A detection rod 11 is connected between the base ball 1 and the cutter rod ball 9, and the conical contact surface of the detection rod 11 is connected with the two spherical surfaces of the base ball 1 and the cutter rod ball 9, and is in close contact under the action of the pre-tightening force, A force sensor and a displacement sensor are arranged in the detection rod, which are respectively used to detect the magnitude of the force applied between the main shaft and the worktable and the change of the distance.
[0012] Th...
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The invention relates to a device and a method for rapidly detecting the static rigidity of a numerical control machine tool. A detection rod is connected between a base all and a tool bar ball; the conical contact surface of the detection rod is connected with two spherical surfaces of the base ball and the tool bar ball, and is in tight contact with the two spherical surfaces under the action of pre-tightening force; a force sensor and a displacement sensor are arranged in the detection rod, and are used for detecting the magnitude of force applied between a main shaft and a workbench and distance change respectively. The whole device is connected between the machine tool workbench and the main shaft; different force loads can be applied between the workbench and the main shaft by using a loading adjusting device in the detection rod; the force sensor and the displacement sensor in the detection rod are used for detecting the force between the main shaft and the workbench and the distance change caused by the force respectively. The static rigidity of the working space of a machine tool is calculated by recording force and displacement data changes of the detection rod during circular movement of the machine tool under different static load conditions. By adopting the device, the static rigidity of the machining plane of the machine tool in different directions can be detected, and the whole detection process contributes to saving of time compared with the conventional way; the device is simple.
Description
technical field [0001] The invention relates to a device and method for rapidly detecting the static stiffness of a numerically controlled machine tool, in particular to a device and method for rapidly detecting the static stiffness in different directions of the working range of the machine tool by using circular motion. Background technique [0002] For metal cutting machine tools, the existence of external forces (cutting force, gravity, inertial force, etc.) The direct consequence is that the accuracy of the workpiece is reduced. Therefore, the performance of the machine tool against external force deformation is an important index reflecting the machining performance of the machine tool, which is generally expressed by the static stiffness of the machine tool. Testing and evaluating the static stiffness of machine tools is an important part of ensuring high-quality machining of machine tools, and is also the basic premise for improving the performance of machining syst...
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IPC IPC(8): B23Q17/00
CPCB23Q17/007
Inventor 陈光胜朱帅
Owner UNIV OF SHANGHAI FOR SCI & TECH