3results about How to "Improve accuracy retention" patented technology

This invention discloses a machining process for precision screws, belonging to the field of mechanical manufacturing technology. It includes the following steps: S1, rough machining and forming: treating the surface of the bar stock and machining functional slot structures, followed by pre-deburring; S2, structural strengthening: heat-treating the workpiece for strengthening; S3, precision finishing: correcting the form and position tolerances of the heat-treated workpiece and precision grinding each surface; S4, quality assurance delivery: completing inspection, cleaning, and packaging. This process flow is clear, employing a logical arrangement of "forming first, then strengthening, and then fine-tuning," resulting in a workpiece with not only a high-hardness surface but also improved coaxiality of its stepped axis and thread trajectory accuracy. This significantly enhances the screw's operational stability at high speeds. Furthermore, through staged quality control and precision correction, it improves the first-pass yield of the workpiece and reduces the risk of scrap due to heat treatment deformation, possessing extremely high industrial application value.

This invention relates to the field of CNC machine tool precision control technology, and discloses a method and system for precision control of heavy-duty CNC machine tools. The method includes: constructing a unified state sample set and a basic error characterization model; performing spatial error partitioning modeling; performing partition boundary transition compensation processing on a preset machining trajectory; performing adaptive feedback correction based on a first compensation trajectory; correcting and controlling CNC commands during the formal machining process; and outputting a precision control result set. Compared to the existing technology that uses a single position compensation method, especially under the condition of machining large, irregularly shaped workpieces across the entire stroke, it cannot achieve the technical problem of boundary area compensation transition. This application, by constructing a unified state characterization model including spatial position, axis load, and workpiece weight distribution, combined with spatial error partitioning and boundary transition compensation, achieves partitioned, continuous, and dynamic precision control of heavy-duty CNC machine tools under the entire machining domain and multiple working conditions.

The invention discloses a numerical control rotary table real-time feedback control device based on multi-source data fusion. The numerical control rotary table real-time feedback control device comprises a numerical control rotary table body, a multi-source data acquisition unit, a data fusion processing unit, an edge calculation module, a layered feedback control unit, a dynamic error compensation unit and a driving execution unit. The numerical control rotary table body adopts a cam roller gapless transmission structure; the multi-source data acquisition unit synchronously acquires position, temperature, vibration, torque and rotating speed full-dimensional data; the data fusion processing unit is used for realizing hardware-level data preprocessing; the edge calculation module is integrated with each unit onboard to realize local real-time calculation; the layered feedback control unit adopts a three-ring nested hardware control architecture; the dynamic error compensation unit is used for full-time dynamic compensation; all the units are electrically connected to form a full-hardware global closed-loop control system; the end-to-end response time of the device is less than or equal to 1ms, the positioning error is less than or equal to + / -0.5 arc second, the device is adaptive to various cam type numerical control rotary tables, and the localization of core parts of high-end numerical control equipment can be promoted.