Method for machining central hole of regular octahedron workpiece and special clamp thereof

Abstract

The invention relates to a method for machining a central hole of a regular octahedron workpiece and a special clamp thereof. By the machining method, the structural characteristics that any one pair of opposite end faces of the regular octahedron are parallel to each other and the projection of the regular octahedron body to any one regular triangle end face is connected to a circumcircle of the regular triangle end face are utilized, and the regular octahedron workpiece is clamped by a sleeve of which the diameter of the inner hole is equal to the diameter of the circumcircle of the regular octahedron workpiece, so that when the regular octahedron workpiece is arranged in a round hole of the clamp body in a horizontal mode, the inner wall of the sleeve can surround six vertex angles of the periphery of the upper and lower regular triangle end faces of the regular octahedron workpiece, the regular octahedron workpiece is clamped in the sleeve through axial limiting devices which are arranged at two ends of the sleeve, a plurality of regular octahedron workpieces are clamped at a time, and the sum of the height of the workpieces is slightly greater than the height of the round hole; and therefore, after a drill bit penetrates through a through hole which is formed at an axial limiting position, the central hole can be drilled on the regular octahedron workpiece.

Description

technical field [0001] The invention relates to a processing method for a central hole of a regular octahedron workpiece used in the technical field of mechanical processing, and also relates to a fixture specially used for the processing method of the regular octahedron workpiece. Background technique [0002] Because the six-contained and eight-cavity pressure device can obtain a larger pressure range, the six-contained and eight-cavity pressure device plays an important role in the study of the structure, phase transition, and physical and chemical properties of materials under extreme conditions. Experiments The pressure transmission medium used for encapsulating the sample is a regular octahedron workpiece sintered by pyrophyllite or MgO, so it is necessary to punch a small round hole in the octahedron, and install the sample in the small round hole for the experiment. [0003] However, due to the special geometric shape of the octahedron workpiece, it is not easy to pr...

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Problems solved by technology

[0003] However, due to the special geometric shape of the octahedron workpiece, it is not easy to process the required small round hole, that is, the center hole, on the octahedron workpiece whether it is a lathe or a bench drill, especially when drilling with a bench drill. There will be a phenomenon that the operator uses his hand as a fixed fixture, which makes the drilling process quite unsafe, and the center hole that is polished is often deflected or a horn hole is drilled, resulting in an increase in the processing error of the center hole

However, using these regular octahedral workpieces with large processing errors for high-temperature and high-pressure material experiments will greatly reduce the repeatability and safety of the experiment, and the accuracy of the experimental results will also be greatly reduced, and the possibility of firing octahedral workpieces will be reduced. Substantial increase, resulting in a lot of waste of financial and material resources, and even casualties

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