How to determine the machining allowance?
Machining allowance to determine how? The size of the allowance for mechanical processing speed, quality and cost has a significant impact. Dongguan Shun Wen remind you to carefully determine the machining allowance. We all know the truth too far. Allowance is the same reason. Allowance is too large, not only increase the amount of labor machining, reducing productivity, and increased material, tool and power consumption and increase processing costs; allowance is too small, it can not eliminate all surfaces before the procedure defects and errors, it can not compensate for this step when machining the workpiece installation error, resulting in waste. Therefore, the allowance should be carefully chosen.
Eastar with many years of practical experience in machining, summed up the following aspects, sincerity for your reference: practical work to determine the allowance There are three ways:
First, the look-up table. According to the manual provided data allowance, combined with the actual situation of the factory after production to determine the allowance to be amended. It is widely factories, using the method.
Second, the empirical estimation. Allowance is determined based on the experience accumulated in the process itself staff. Usually in order to prevent margin is too small to produce waste, the estimated margin is always too large. Commonly used in a single piece, small batch production.
Third, the analysis method of calculation. According to the theoretical formulas and some experimental data on various factors affect the machining allowance is analyzed to determine the allowance calculation. This method is more reasonable, but requires comprehensive and reliable test data, calculations are more complicated. Generally only use very expensive materials or a few large, mass production factories.
