CN105149938A - Automatic component assembling method based on Catia - Google Patents

Abstract

The invention relates to the field of component assembling and designing, in particular to an automatic component assembling method based on Catia to solve the problems that during current component assembling, time and labor are wasted. The automatic component assembling method based on Catia comprises the steps that firstly, assembling characteristics of components are determined, and characteristic coordinate systems of the components are established according to the assembling characteristics; secondly, transformation matrixes among the components are calculated according to the characteristic coordinate systems of the components, transformation is carried out on the transformation matrixes of the components to be moved, and assembled position coordinates are obtained; and finally, the components to be moved are endowed with the position coordinates, and accordingly automatic assembling of the components can be rapidly and effectively finished. Time and labor cost are saved.

Description

A kind of part automatic assembly method based on Catia

Technical field

The present invention relates to Assembly of the parts design field, be specifically related to a kind of part automatic assembly method based on Catia.

Background technology

When carrying out trim designs with Catia, need to utilize movement, alignment etc. to order the Space configuration of each part.Particularly when there are a large amount of parts in installation diagram, manually being put by each parts puts in place is a not only time-consuming but also job of requiring great effort.

Summary of the invention

The object of this invention is to provide a kind of part automatic assembly method based on Catia, to solve the problem that current Assembly of the parts is wasted time and energy.

Technical scheme of the present invention is:

Based on a part automatic assembly method of Catia, part comprises multiple, and the position coordinates system that each part has, comprising:

Step one, determine that the assembly features of each part, assembly features comprise such as hole with axle assembling, the laminating assembling of face, face or groove and protruding assembling etc.;

Step 2, set up the property coordinate system of each part according to described assembly features;

Step 3, calculate the transformation matrix between each part according to described property coordinate system;

Step 4, the position coordinates system of part wherein to be moved to be converted with described transformation matrix, obtain the position coordinates after assembling;

Step 5, by after described assembling position coordinates give described part to be moved, realize the assembling between multiple described part.

Alternatively, in described step 2, be come denotation coordination system by following homogeneous coordinates matrix:

$\left[\begin{array}{cccc}Xx& Xy& Az& 0\\ Yx& Yy& Yz& 0\\ Zx& Zy& Zz& 0\\ Ox& Oy& Oz& 1\end{array}\right];$

Wherein, upper three row are respectively the vectorial coordinate of X, Y, Z axis, and last column is origin.

Alternatively, in described step 3, be represent transformation relation by the matrix of 4 × 4.

Beneficial effect of the present invention:

Part automatic assembly method based on Catia of the present invention, first the transformation matrix between each part is calculated according to the property coordinate system of each part, the transformation matrix of part wherein to be moved is converted, obtain the position coordinates after assembling, part to be moved is given again by position coordinates, thus the automatic assembling that can complete quickly and efficiently between multiple part, save time and human cost.

Accompanying drawing explanation

Fig. 1 is any two Assembly of the parts principle schematic of the present invention;

Fig. 2 is pipe component and the bolt part first assembling process schematic diagram of one embodiment of the invention;

Fig. 3 is pipe component and the bolt part second assembling process schematic diagram of one embodiment of the invention;

Fig. 4 is the schematic diagram after the pipe component of one embodiment of the invention and bolt Assembly of the parts complete.

Detailed description of the invention

Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.

As shown in Figure 1, a kind of part automatic assembly method based on Catia provided by the invention, described part comprises multiple, the position coordinates system that each described part has; Part automatic assembly method specifically comprises the steps:

Step one, determine that the assembly features of each part, assembly features comprise such as hole with axle assembling, the laminating assembling of face, face or groove and protruding assembling etc.Part can comprise multiple, as shown in Figure 1, comprises the first part 1 and the second part 2; Wherein, the first part 1 and the second part 2 are that groove and projection are assembled, and are again the laminating assembling of face, face between groove and projection.

Step 2, set up the property coordinate system of each part according to assembly features.Further, be come denotation coordination system by following homogeneous coordinates matrix in the present embodiment:

$\left[\begin{array}{cccc}Xx& Xy& Az& 0\\ Yx& Yy& Yz& 0\\ Zx& Zy& Zz& 0\\ Ox& Oy& Oz& 1\end{array}\right];$

Wherein, upper three row are respectively the vectorial coordinate of X, Y, Z axis, and last column is origin; The assembly features coordinate system 3 on the first part 1 and the assembly features coordinate system 4 on the second part 2 can be represented respectively with CA and CB.

Step 3, calculate the transformation matrix between each part according to property coordinate system.In the present embodiment, be represent transformation relation by the matrix of 4 × 4, the conversion of CB to CA can be represented by homogeneous coordinates matrix T B-A, i.e. T _b-A× C _b=C _a, then

Step 4, the position coordinates system transformation matrix of part wherein to be moved to be converted, obtain the position coordinates after assembling.Part position coordinate C'PB after second part 2 assembles can calculate with following formula: C' _pB=T _b-A× C _pB.

Step 5, by assembling after position coordinates give part to be moved, realize the assembling between multiple part.As shown in Figure 1, the relevant position the second part 2 being assembled to the first part 1 is needed.Namely the position of part B is set to C'PB, just achieves the automatic assembling of part B.After having assembled, the assembly features coordinate system 3 on the first part 1 overlaps with the assembly features coordinate system 4 on the second part 2.

Part automatic assembly method based on Catia of the present invention, first the transformation matrix between each part is calculated according to the property coordinate system of each part, the transformation matrix of part wherein to be moved is converted, obtain the position coordinates after assembling, again position coordinates is given part (the position coordinates system 5 of the second part 2) to be moved, thus the automatic assembling that can complete quickly and efficiently between multiple part, save time and human cost.

As shown in Figures 2 to 4, be further described with the example of one section of pipeline assembling.

First, program, according to the assembly features of the assembly features of bolt part 7 and pipe component 6, sets up the assembly features coordinate system (as shown in Figure 3) of part.

By calculating, obtain the coordinate transforming from bolts assemblies property coordinate system 8 to pipe component assembly features coordinate system 9.

Again the original position coordinate system of bolt part 7 is multiplied with this coordinate transforming, obtains rigging position.

The position coordinates of bolt part 7 is set to final position coordinate by program, just completes the assembling of bolt part 7, the results are shown in Figure 4.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.

Claims (3)

1. based on a part automatic assembly method of Catia, part comprises multiple, and each part has position coordinates system, it is characterized in that, comprises the steps:

Step one, determine the assembly features of each part;

Step 2, set up the property coordinate system of each part according to described assembly features;

Step 3, calculate the transformation matrix between each part according to described property coordinate system;

Step 4, the position coordinates system of part wherein to be moved to be converted with described transformation matrix, obtain the position coordinates after assembling;

Step 5, by after described assembling position coordinates give described part to be moved, realize the assembling between multiple described part.

2. the part automatic assembly method based on Catia according to claim 1, is characterized in that, in described step 2, is come denotation coordination system by following homogeneous coordinates matrix:

$\left[\begin{array}{cccc}Xx& Xy& Az& 0\\ Yx& Yy& Yz& 0\\ Zx& Zy& Zz& 0\\ Ox& Oy& Oz& 1\end{array}\right];$

Wherein, upper three row are respectively the vectorial coordinate of X, Y, Z axis, and last column is origin.

3. the part automatic assembly method based on Catia according to claim 1 and 2, is characterized in that, in described step 3, is represent transformation relation by the matrix of 4 × 4.