What are the contents involved in plastic mold processing?
The latest development of automotive plastic molds is the direct connection between an external computer and a CNC machine tool through an RS-232C serial port, allowing for fast and accurate transmission of NC programs. The external computer can also be connected to multiple CNC machine tools with the same or different control systems for information sharing, and can manage information in the production process of a CNC section composed of multiple machine tools, reducing production preparation time, especially for CNC programs.
Most existing CAD/CAM software for high-speed machining of molds have the function of analyzing residual machining allowance and can adopt reasonable semi precision machining strategies based on the size and distribution of residual machining allowance.
When processing mold cores in Shenzhen, it is advisable to first cut from the outside of the workpiece and then horizontally cut into the workpiece. When cutting in and out of workpieces with cutting tools, inclined (or circular arc) cutting should be used as much as possible to avoid vertical cutting in and out.
The use of climbing cutting can reduce cutting heat, decrease tool stress and work hardening degree, and improve machining quality.
The main goal of semi precision machining is to make the contour shape of the workpiece flat and the surface precision machining allowance uniform. This is particularly important for tool steel molds because it will affect the changes in the cutting layer area and tool load during precision machining, thereby affecting the stability of the cutting process and the surface quality of precision machining.
The optimization process of plastic molds in Shenzhen includes: calculation of the contour after rough machining, calculation of the maximum remaining machining allowance, determination of the maximum allowable machining allowance, partitioning of the surface with a remaining machining allowance greater than the maximum allowable machining allowance (such as grooves, corners, and other areas with transition radii smaller than the rough machining tool radius), and calculation of the tool center trajectory during semi precision machining.
What are the contents involved in plastic mold processing?
Rough machining is based on the Volume model, while precision machining is based on the Surface model.
Previously developed CAD/CAM systems had discontinuous geometric descriptions of parts. Due to the lack of intermediate information describing the machining model after rough machining and before precision machining, the distribution and maximum remaining machining allowance on the rough machined surface are unknown. Therefore, the semi precision machining strategy should be optimized to ensure that the workpiece surface has a uniform residual machining allowance after semi precision machining.