Method for compensating errors occurring in a production process

Abstract

The invention pertains to a method for controlling a production process of an object in a production assembly and for compensating errors occurring in the production process, the method (100) comprising generating actual property data comprising obtained values of properties of at least one sample object produced in the production assembly according to a production model; performing a nominal-actual value comparison (150) with the obtained values of properties of the actual property data and set values of corresponding properties of nominal property data of the object, thereby generating deviation data, and automatically creating (170) an adapted production model based on the nominal property data and on the deviation data, wherein the adapted production model is useable in an adapted production process for producing an adapted object in the production assembly, and differs from the nominal property data so that the errors occurring in the production process are at least partially compensated in the adapted production process. The invention furthermore pertains to a self-compensating manufacturing system, a measurement unit and an error compensation unit for execution of said method (100).

Description

technical field [0001] The invention belongs to the field of quality assurance of production processes. More specifically, the present invention relates to a system and method for controlling a production facility based on the measurement of samples of the output of the production process, defined by nominal data, and for compensating for systematic errors occurring during the production process, For example, provided as mechanical drawings and / or CAD models. Background technique [0002] This is a common practice used during the industrial production of commodities such as automobiles to measure the characteristics and properties of their different parts. These measurements can be carried out in special measuring units by means of contact or non-contact measuring instruments (eg based on laser or photogrammetric principles). Such a procedure is disclosed, for example, in DE19544240A1. [0003] US 7,672,500 discloses a method for monitoring and visualizing the output of a...

AI Technical Summary

Problems solved by technology

[0012] However, this parameter value modification has the strong disadvantage that it requires good knowledge about the general installation setup of the facility, the current configuration of the facility and about the causes of production errors

This requires highly skilled personnel and in addition - due to production error causes are often not known exactly - in many cases a try-and-error approach has to be carried out, which is time consuming and expensive

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