Manhart How to evaluate the machining accuracy of a fully electric servo CNC coiling machine?

The evaluation of the machining accuracy of the fully electric servo CNC coiling machine can be carried out from the following aspects:
1、 Selection and preparation of processing specimens
1. Positioning of the test piece: The test piece should be located in the middle of the X stroke of the machine tool and placed at an appropriate position along the Y and Z axes that is suitable for the positioning of the test piece and fixture, as well as the length of the tool.
2. Fixation of test piece: The test piece should be easily installed on a dedicated fixture to achieve maximum stability of the tool and fixture. The installation surface of the fixture and specimen should be straight, and the parallelism between the installation surface of the specimen and the clamping surface of the fixture should be checked.
2、 Cutting parameters and material selection
1. * * Cutting parameters * *: Cutting speed, feed rate, cutting depth and other parameters should be selected according to the agreement between the manufacturer and the user, and recorded. For example, the cutting speed of cast iron parts is about 50m/min, the cutting speed of aluminum parts is about 300m/min, the feed rate is about (0.05~0.10) mm/tooth, and all milling processes should have a radial cutting depth of 0.2mm.
2. * * Test piece material * *: The material of the test piece should be selected according to the principle of matching the cutting tool and cutting parameters.
3、 Processing accuracy detection indicators
1. * * Dimensional accuracy * *: The machine tool should be able to accurately process the specified dimensions, with an error within ± 0.01mm. This requires the use of measuring tools such as micrometers, gauges, and block gauges for inspection.
2. Shape accuracy: The shape of the parts processed by the machine tool should match the design drawings, with an error within ± 0.02mm. This requires the use of instruments such as optical microscopes and electron microscopes to detect the shape accuracy of the parts.
3. Surface roughness: The surface roughness of the parts processed by the machine tool should meet the design requirements, generally between Ra0.8-Ra1.6.
4. * * Repetitive accuracy * *: When the machine tool repeatedly processes the same part, the dimensional and shape errors should be within ± 0.02mm. Evaluate by processing the same part multiple times and detecting changes in its size and shape errors.
4、 Other considerations
1. * * Thermal stability * *: The machine tool should be able to maintain stable machining accuracy and efficiency during continuous processing, without significant thermal deformation.
2. Vibration and Noise: The vibration and noise generated during the operation of the machine tool should comply with relevant national standards and enterprise standards.
5、 Evaluation of servo motors
For fully electric servo CNC coiling machines, the accuracy of servo motors is also an important factor affecting machining precision. It is possible to evaluate the position accuracy, repeat positioning accuracy, speed accuracy and other parameters of servo motors, which are usually described by the values in the technical specification table provided by the manufacturer.
6、 Comprehensive evaluation
Finally, it is necessary to integrate the above evaluation results to determine the overall machining accuracy level of the fully electric servo CNC coiling machine. In the evaluation process, other factors such as the reliability, efficiency, and environmental friendliness of the machine tool also need to be considered.
Through the above methods, the machining accuracy of the fully electric servo CNC coiling machine can be comprehensively and objectively evaluated, providing strong support for the selection, use, and maintenance of the machine tool.