Analysis of transmission error of machine tool transmission chain? Measures to reduce the transmission error of the transmission chain?
Error analysis: that is to measure the angle error Δφ of the end element of the transmission chain
Measures: 1. The fewer the number of transmission chains, the shorter the transmission chain, the smaller the Δφ, and the higher the accuracy.
2. The smaller the transmission ratio i, the smaller the transmission ratio at the head end and the end.
3. Since the error of the end piece in the transmission part has the greatest influence, it should be made as accurate as possible
4. Using a correction device
How are machining errors classified? Which errors are constant errors? Which errors are systematic errors of variable value? Which errors are random errors?
System error: (constant value system error variable value system error) random error
Constant system error: machining principle error, machining error caused by machine tool, tool, fixture manufacturing error, force deformation of process system, etc.
Variable value system error: wear of props; thermal deformation error of tools, fixtures, machine tools, etc. before thermal equilibrium
Random errors: copying of blank errors, positioning errors, tightening errors, errors of multiple adjustments, deformation errors caused by residual stress }