Industry News

Analyze reason of mechanical parts’ inevitable error

Upadte:2017-06-22
Abst:

1, the process system caused by the deformation of the error The process system in the cutting force, clamping force, gravity and inertia force will be under the action of deformation, thus undermining the adjustment of the various components of the process of the relationship between the various parts of the relationship, resulting in processing errors, and affect the stability of the process Sex.

1, the process system caused by the deformation of the error

The process system in the cutting force, clamping force, gravity and inertia force will be under the action of deformation, thus undermining the adjustment of the various components of the process of the relationship between the various parts of the relationship, resulting in processing errors, and affect the stability of the process Sex.

2, processing principle error

Processing principle error refers to the use of an approximate blade contour or approximate transmission relationship between the processing error. For example, the gear hob for machining involute gears, in order to make the hob manufacturing easy, the use of the Archimedes base worm or the normal profile of the basic worm instead of involute basic worm, the gear involute tooth profile The error. (Such as mπ), where m is the modulus, and π is an irrational number, but the lathe of the gears of the gears is limited, and the replacement gears are selected for the gears (Π = 3.1415) can only be calculated, which will cause the tool for the workpiece forming movement (spiral motion) is not accurate, resulting in pitch error.

3, the geometric error of the process system

Due to the actual geometric parameters and position of each component in the process system, the error caused by the deviation from the ideal geometric parameters and the position is collectively referred to as the process system geometry error. The geometry error of the process system is only related to the geometric elements of each part of the process system.

4, the process of heating deformation caused by the error

In the process of processing, due to the heat of cutting, friction heat and the workplace around the heat source, the process system temperature will produce complex changes. Under the action of various heat sources, the process system is deformed, resulting in a change in the correct relative position of the components in the system, resulting in machining errors.

5, the workpiece caused by the stress caused by the error

The internal stress is the error factor of the workpiece itself. Workpieces after hot and cold processing will produce a certain internal stress. In general, the internal stress is in equilibrium, but when the workpiece with internal stress is processed, the original internal stress balance is destroyed, so that the workpiece deformation.

6, measurement error

In the process of adjustment and processing of the workpiece measurement, due to measurement methods, measuring accuracy and other factors on the accuracy of the measurement results of the error, collectively referred to as measurement error.