A Trial Type of Hybrid Micro Machine Tool
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A hybrid micro machine tool is developed. This tabletop size machine tool can be applied for EDM, ECM, mechanical machining, laser processing, and complex machining which is combined each machining method. To study the basic performance of hybrid micro machine tool, a complex machining experiment is carried out with the developed machine tool. The complex machining has 3 steps : machining electrode by milling, hole shaping by EDM, and hole finishing by ECM. These steps are performed in sequence on the same machine tool. In order to evaluate a hybrid micro machine tool from the environmental point of view, machining energy, the volume of machining liquid, and installation space of hybrid micro machine tool are measured. The measured values are compared with estimated values when same complex machining is carried out with conventional machine tools. Machining energy, the volume of machining liquid, and installation space of hybrid micro machine tool areone-hundredth times smaller than that of conventional machine tool.Keywords:
Machine tool
Computer numerical control (CNC) machine tool plays an extremely significant role in any manufacturing industry due to its automation and high accuracy. Keeping the CNC machine tool at its highest performance to meet the demand of high accuracy machining is always significant. To maintain the accuracy of a machine tool over the time, it is important to measure and compensate the geometric error, one of the main error source of machine tool, especially when the machine get old. There are totally 21 geometrical errors in a 3-axis machine tool including three translational errors and three rotational errors for each axis and three perpendicular error (Squareness) within three axes of the machine. This paper presents an economical and simple method for measuring the geometric error of a 3-axis CNC machine tool based on the machining of actual samples. Three samples for each axis will be machined following a design cutting path. The samples will then be measured using a coordinate measuring machine (CMM). The collect data will be used for estimating the geometric errors. The volumetric errors will be then computed and verified through machining of 3D geometries.
Machine tool
Coordinate-measuring machine
Cnc milling
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Machine tool
Computer-aided
Computer technology
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A hybrid micro machine tool is developed. This tabletop size machine tool can be applied for EDM, ECM, mechanical machining, laser processing, and complex machining which is combined each machining method. To study the basic performance of hybrid micro machine tool, a complex machining experiment is carried out with the developed machine tool. The complex machining has 3 steps : machining electrode by milling, hole shaping by EDM, and hole finishing by ECM. These steps are performed in sequence on the same machine tool. In order to evaluate a hybrid micro machine tool from the environmental point of view, machining energy, the volume of machining liquid, and installation space of hybrid micro machine tool are measured. The measured values are compared with estimated values when same complex machining is carried out with conventional machine tools. Machining energy, the volume of machining liquid, and installation space of hybrid micro machine tool areone-hundredth times smaller than that of conventional machine tool.
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OKUMA heralded in the industry and developed high-speed contour machining technology to control high-accuracy, high-quality and high-speed machining in shape machining as represented by die mold machining. In 1987,the technology was loaded into our company's computer numerical control "OSP". Since then, our company has developed and supplied a series of advanced control functions one after another prior to the needs of a market. OKUMA has developed the new high-speed contour machining technology "super-NURBS" which is based on technologies cultivated for many years. The new control technology "Super-NURBS" always pulls out the highest acceleration and deceleration performance of a machine also in curved surface machining. With this, "Super-NURBS" improves the machined accuracy and quality as well as reducing the machining time sharply (conventional ratio of our company twice). The following describes the abstracts and effects of new numerical control technology "Super-NURBS".
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CNC machine tool numerical control system by monitor,servo controllers,servo motors,switches and sensors,and numerical control machine tool has a strong dependence on electronics,computers and other high-tech,as technology advances,our country will substantially increase the proportion of demand on CNC machine tools,non-numerical control machine tool will gradually be eliminated.Many companies have begun to apply CAD(computer aided design),ERP(enterprise resource planning)and information technology to respond to the development of numerical control machine tools such as e-commerce requirements.
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Machine control
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Modern numerical control machine is the production of many advanced technology-synthetic application in computer,automatic control,automatic detection and exact machnie etc..Machining part with numerical control machine pays more attention to technologic analysis before producing than with ordinary machine.This page analyzes the chiefly technology at machining part with numerical control machine.Such as the design of machining sequence,programming method,cutter point selection,machining route decision etc..
Machine tool
Sequence (biology)
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Abstract Machine tools usually cut two or more surfaces after the work piece clamped on work table. In order to improve the machining accuracy and optimize accuracy design, it is hoped that the geometric errors that influence the accuracy of machined surface prominently can be known beforehand, so the adjustment will be carried out with a definite objective rather than without any clue. Because the machining accuracy of each direction in 3-D space is different value, in this paper, machining accuracy failure mode was defined as the various combination of the machining accuracy of each direction according to whether it is up to the reserved objective value or not. A three-axis machine tool was selected as an example and there were 7 machining accuracy failure modes for it. Based on the generalized correlation analysis, the correlation relationships between 7 machining accuracy failure modes were analyzed, and the main failure modes that affect the machining accuracy of work piece to be machined were identified. For each machining accuracy failure mode, key geometric error that had major influence on it was identified based on sensitivity analysis. Finally, four stepped work pieces were milled by a 3-axis machine tool to illustrate the analytical method proposed in this study.
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Mode (computer interface)
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Machine tool
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Numerical control machine tools are mother machine in the equipment manufacturing industry, which have important influence to the national defense and economic development. This paper gives a briefly introduction to the development history and advantages of numerical control machine tool and high-grade CNC machine tool.
Machine tool
Machine building
Machine control
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The machining error of a variableaxis NC machine tool is analyzed by studying the deformation of Stewart platform, the kinetic part of the machine tool. Vector expression of machining error is derived on the condition of static loads. Moreover, the machining error is preadjusted by establishing a relevant preadjusted model. The method is universal and provides a theoretical foundation to improve the machining accuracy of the machine tool in static stiffness. A simulation example is finally given, demonstrating that the machining error arisen from the static stiffness does exist and the error has to be corrected.
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