“Design and manufacture a wireless transceiver that performs mixed transmission of digital-analog signals on the same channel. Among them, the digital signal is composed of a set of 4 numbers from 0 to 9; the analog signal is a voice signal with a frequency range of 100 Hz to 5 kHz. Using wireless transmission, the carrier frequency range is 20~30MHz, the channel bandwidth is not more than 2...
In recent years, it has entered the field of ultra-precision parts processing technology. From the perspective of development, it will play a greater role in the next century. Today’s electrical machining is close to the level of ultra-precision machining regardless of its function or machining quality. Taking wire EDM as an example, through the use of secondary cutting, its cutting accuracy is ±2μm, which can achieve high surface quality. ; From the perspective of development, ultra-precision machining technology has been advancing to a higher level, so its definition is difficult to determine, and the accuracy has continued to improve over time, so metrology is the first to bear the brunt.
The main feature of precision parts processing is a precision automatic lathe, with five sets of tool holders, each equipped with micrometer fine-tuning to make the workpiece high precision; more than 10 tools can be installed according to the workpiece processing procedure. Two-axis device: The main shaft adopts an electromagnetic clutch to drive the tapping spindle. The high-speed rotation and the rotation difference of the mechanical spindle in the same direction are used for tapping. The two-axis can be shaken and transformed. Reaming and tapping internal and external teeth can be processed at the same time.
Precision parts processing technology is a comprehensive system engineering. Its development comprehensively utilizes advances in machine tools, tools, metrology, environmental technology, microelectronics technology, computer technology, and numerical control technology. Its achievements will promote the entire An important means for the development of science and technology to a higher level is also a key technology that must be broken through at this stage.