(A) The test specimen shall be positioned in the middle of the X stroke and placed along the Y and Z axes in the appropriate position for specimen and fixture positioning and tool length. When there are special requirements for the location of the test piece, it shall be stipulated in the agreement between the manufacturer and the user
(B), the specimen fixed specimen should be easy to install on a dedicated fixture, in order to achieve maximum stability of the tool and fixture. Fixture and specimen mounting surface should be straight. The test piece mounting surface should be tested and the fixture clamping surface parallelism. Appropriate clamping methods should be used to allow the tool to penetrate and machine the full length of the center hole. It is recommended to use countersunk screws to secure the specimen to avoid interference between the tool and the screw. Alternatively, other equivalent methods may be used. The overall height of the test piece depends on the chosen method of fixing. The company is located in:
The company is located in:
(C), the specimen of the material, the knife and the cutting parameters The specimen materials and cutting tools and cutting parameters in accordance with the agreement between the manufacturer and the user selected, and should be recorded, the recommended cutting parameters are as follows:
1, cutting speed: cast iron is about 50m / min; aluminum is about 300m / min.
2, feed: about (0.05 ~ 0.10) mm / tooth. The company is located in:
3, depth of cut: all milling process in the radial depth of cut should be 0.2mm.
(D), the size of the specimen If the specimen cut several times, reduce the overall dimensions, the aperture increases, when used for acceptance testing, it is recommended to use the final contour machining specimen size consistent with the provisions of this standard in order to accurately Reflects the cutting accuracy of machine tools. Specimens may be used repeatedly in cutting tests and their specifications shall be maintained within 10% of the nominal size given in this standard. When the test specimen is used again, a thin layer of cutting should be performed to clean all the surfaces before the new precision test.
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