Summary of working knowledge: 1, how to quickly master accurate work movements for novices. 2, how the teacher teaches wire cutting. First, from the novice work mentality, focus on the operation of the movement, the development of good habits of these three points.
A, for the new job, we must always maintain a continuous desire to learn the heart, so that "three people must have my teacher", "review the old and know the new"; In the process of learning, abandon the idea of high vision and low skills, and practice more.
B, preliminary understanding of machine tool performance (coordinate system, processing specifications), molybdenum wire specifications required for processing workpiece, cutting fluid selection (oil-based, water-based);Wire operation: After manually adjusting the travel switch to the appropriate position, the wire barrel is opened to the leftmost end (the counterclockwise manual lasts 35 to 55 cycles), the molybdenum wire is tightened and the manual winding begins (or the control handle automatically wraps the wire, the speed is kept between 100 and 200; Or the lowest gear), when the cylinder goes to the right end (manual clockwise rotation 35 to 55 turns); Then tighten the wire with the tightening wheel (pay attention to the hand strength to balance, while maintaining a movement, it is best to tighten the wire at high speed). Processing trilogy: look at the drawings (determine the external size of the workpiece to process the workpiece), look at the process (determine the machining tolerance, materials), and find the appropriate clamping method (bracket, press, etc.). Operation action: After clamping and fixing the workpiece, make sure that the molybdenum wire is located in the middle of the upper and lower guide wheel, and the upper and lower water plate does not hinder the operation of the molybdenum wire; Check the level of the workpiece with a dial indicator (or check with a needle); Manually stick the vertical of the x and y axes (CNC machine tools are operated with control handles); Drawing or manually input the program in a single board machine; Select the appropriate interpulse and pulse width (according to the height of the workpiece, material, roughness, etc.); Check the water amount and concentration of cutting fluid in the tank; Put the waterproof plate in place for processing.
C, work habits: abide by the processing trilogy before processing (know it by heart); Observe the machining condition of the machine tool at any time during the processing process (to prevent broken wire, cutting fluid blockage, processing current instability, conductive block wear and other problems); Replace molybdenum wire and cutting fluid regularly, and keep the surface of the machine clean.
2, from the key practical operation, task assignment, learning progress feedback of these three points.
A, in the professor, the focus of practical operation must be quantified, specific to how to do each step, what degree is qualified, there are different methods of operation, these points must be clear (not on paper).
B, every morning to determine the students' learning tasks (specific, simple and clear), clear learning objectives (clear), determine the assessment standard actions (can be considered based on evidence).
C, develop a feedback mechanism for students' learning progress, assess students every 5 days or 7 days (according to the specific situation), and give material and spiritual rewards through the assessment (if you fail to pass the assessment, review with students, identify problems, encourage students to propose solutions, and finalize the implementation plan).
From novice to skilled is the process of experience accumulation, but also the operation of continuous standardization, innovative thinking constantly enrich the process; Only by maintaining a mindset of continuous learning can we become an irreplaceable person.