A manufacturer of non-standard parts explains the process for machining non-standard components and the characteristics of precision part machining.
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Industry News
Published:2022-06-23
Non-standard part machining Let the manufacturer explain the process for machining non-standard parts and the characteristics of precision part machining.
Non-standard parts manufacturer: What is the process for machining non-standard parts?
In the machining process of non-standard parts, the reference surface is crucial—and the same holds true for the machining of precision mechanical components. Typically, the precise reference surface is machined first, and then other surfaces are machined based on this reference. We will now provide a detailed introduction to this process.
For box-type parts, the primary hole is typically used as the rough reference to machine the plane, and then the plane is used as the fine reference to machine the hole system. For shaft-type parts, the outer circle is usually used as the rough reference to machine the center hole, and subsequently the center hole serves as the fine reference for machining surfaces such as the outer circle and end faces. If there are several fine references, the machining of the base surface and the primary surface should be arranged according to the sequence of reference transformations and in accordance with the principle of progressively improving machining accuracy.
For workpieces such as housings, brackets, and connecting rods, the planes should be machined before the holes. Since plane contours are flat and have large surface areas, machining the planes first and then using these planes as reference surfaces for hole positioning not only ensures stable and reliable positioning during machining but also helps to meet the required positional accuracy between the holes and the planes.
A part typically consists of several curved surfaces, and the machining of each surface generally needs to be carried out in stages. When arranging the machining sequence for precision mechanical parts, one should first schedule rough machining for all surfaces, followed by semi-finish machining as needed in the intermediate stage, and then finish machining and fine finishing. For workpieces with high precision requirements, in order to minimize the impact of deformation caused by rough machining on fine machining, it is generally advisable not to perform rough and fine machining continuously but rather to carry them out in staged operations with appropriate intervals.
Non-standard part machining Manufacturer: What are the characteristics of precision parts machining?
Precision part machining offers numerous advantages. We’ve previously shared with you the specific benefits of precision part machining—most notably, its ability to achieve high precision that’s unattainable through conventional machining methods. This high precision relies on sophisticated machining equipment and precise constraint systems, with a precision mask serving as an intermediary to enable extremely fine control over the amount of material removed or added from the part’s outer surface. So, what exactly are the characteristics of precision part machining? Below, we’ll provide you with a detailed introduction.
I. Cutting Machining of Precision Parts
The main processes include precision turning, mirror grinding, and grinding. Microturning is performed on a precision lathe using a single-crystal diamond tool that has been finely ground; the cutting depth is only about 1 micron. It is commonly used to machine high-precision, smooth components such as spherical surfaces, aspheric surfaces, and plane mirrors made from non-ferrous metals.
II. Processing of Non-Standard Precision Parts
When the precision of non-standard parts reaches the nanometer level—or even the atomic level (with atomic lattice spacings ranging from 0.1 to 0.2 nanometers)—conventional ultra-precision machining methods can no longer meet the requirements. In such cases, special precision machining techniques must be employed, utilizing energy sources such as chemical energy, electrochemical energy, thermal energy, or electrical energy to surpass the total energy interaction between atoms. The machining of non-standard parts involves removing certain atoms from the workpiece surface, breaking their bonds, or inducing lattice distortions, thereby achieving ultra-precision machining. These processes include mechanochemical polishing, ion sputtering and ion implantation, electron-beam lithography, laser-beam treatment, metal vaporization, and molecular-beam epitaxy.
Non-standard part machining Manufacturer: That’s all for today’s explanation. Wishing everyone a happy life!
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