A Method of Controlling the Composite Position Error of Hole Groups by Optimizing Fixture Layout

Abstract

The invention discloses a method for controlling the composite position error of a hole group by optimizing the layout of a fixture. The method comprises the following steps: establishing a relationship model between the geometric error of the fixture positioning element, the position of the positioning element and the position error of the workpiece; establishing the milling force, The relationship model between the clamping force, the position of the positioning element and the position error of the workpiece; the objective function is to minimize the composite position error of the hole group feature, and the position of the fixture positioning element is the optimization variable. Combined compound position degree error is the smallest. The fixture design method has strong versatility and simple design method.

Description

technical field

[0001] The invention relates to the field of fixture design, in particular to a method for controlling the compound position error of hole groups by optimizing the layout of fixtures. Background technique

[0002] Fixtures are an important part of process equipment. The workpiece has a definite position in the fixture, and it does not change with the influence of various factors in the process of processing or measurement. It is a technical requirement that the fixture must meet to ensure accurate positioning, stability and reliability. At present, scholars at home and abroad have done a lot of research work on the problem of fixture layout design.

[0003] The positioning error of the fixture is the main factor leading to the position error of the workpiece. The positioning error of the fixture is mainly determined by the position error of the positioning element, the geometric error and the geometric error of the workpiece reference plane. Qin [1] estab...

Images