CN103286440A - Fast positioning method of laser cutting part - Google Patents

Abstract

The invention relates to a fast positioning method of a laser cutting part. The method includes the following steps: (1) measuring and building a coordinate system of the laser cutting machine; (2) measuring a practical position of a par tool; (3) carrying out laser cutting part programming, wherein three points are built in laser cutting programming software according to a practical coordinate value relative to a measured target, a numerical module of the part tool is adjusted so that a theory numerical model of the target in the tool model coincides with the three built points, and positioning of the numerical model of the tool is finished; (4) carrying out part cutting programming through the tool numerical model. The method can fast, efficiently and accurately position the part and guarantees precision and efficiency of the laser cutting part.

Description

The method for rapidly positioning of laser cutting part

Technical field

The present invention relates to a kind of method for rapidly positioning of laser cutting part, be used for the quick location of laser cutting part.

Background technology

The a large amount of use in the aircraft development process of titanium-alloy thin-plate class part, but the manual difficulty of processing of this part is very big, introducing along with large-scale five coordinate laser cutting devices, realized the outer rim Laser cutting of the thin-walled class titanium alloy component of super plastotype, replace original manual processing, efficient improves Laser cutting greatly with respect to processing not only by hand, and machining accuracy has more had guarantee.

The laser cutting process of part is: at part tooling design three place's locating holes, be positioned in the laser cutting machine after frock machines, laser generator and three locating holes is close to greatest extent, and record is the coordinate figure at three places at that time.By the coordinate figure of record and the coordinate figure match of former design point, carry out the part programming with the anti-position of part under the laser cutting machine coordinate of obtaining, in the whole process, any movement can not take place in part tooling, otherwise need the physical location in profiling measurement and positioning hole again, each renewal part frock all needs to carry out again a profiling and measures.

The problem that above processing mode exists is: because laser generator is merely able to greatest extent near part tooling, the value that obtains is not accurate enough, and be merely able to slowly operation in the measuring process and run into the damage that piece surface causes generator to prevent laser generator, different personnel operation level differences, also there is bigger difference in the value of measuring, the element precision that very difficult assurance finally processes, part is scrapped and is happened occasionally, be merely able to take to leave a small amount of surplus at last, adopt the mode of the manual processing of workman then, make Laser cutting not play crucial effect.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of method for rapidly positioning of laser cutting part, and this method can be fast, efficiently, accurately part is positioned, and guarantees precision and the efficient of laser cutting part.

For overcoming the above problems, concrete technical scheme of the present invention is as follows: a kind of method for rapidly positioning of laser cutting part may further comprise the steps:

1) measures and sets up the laser cutting machine coordinate system: place a target at laser cutting head, measure the coordinate figure that the laser cutting machine initial point is in X, Y, three direction extreme value places of Z respectively, by target and laser generator position relative coordinate value conversion laser generator position coordinates, in laser tracker, set up the laser cutting machine coordinate system by the coordinate figure of the initial point place after converting and X, Y, three direction extreme value places of Z;

2) measure the part tooling physical location: part tooling is placed in the laser cutting machine, the position that design at least three places are used for placing target on the part tooling, use laser tracker to measure the target of placing on the part tooling, the relative actual coordinate value in the laser cutting machine coordinate system;

3) laser cutting part programming: in the laser cutting programming software, set up three points according to the relative actual coordinate value of measurement target drone, adjust the part tooling digital-to-analogue and make the theoretical digital-to-analogue of the interior target of frock digital-to-analogue overlap with three points of foundation, finish the location of frock digital-to-analogue;

4) back, location frock digital-to-analogue is carried out part cutting programming.

The method for rapidly positioning of this laser cutting part has the following advantages:

1, tool locating can effectively guarantee the machining accuracy of part accurately: compare profiling match location, can realize the accurate location of part tooling by this way, to guarantee the precision of part cutting, can realize not having surplus processing, avoid the inaccurate part that causes of a large amount of problems and profiling match location of the follow-up manual processing of band surplus part to scrap problem;

2, tool locating efficient is very high: compare profiling match location, the time that needs by this way location can reduce 20 times at least;

3. can reduce the probability that generating laser damages: position by square match for a long time, take place during the phenomenon on laser generator bump frock surface, can effectively avoid this type of phenomenon by this way.

The specific embodiment

A kind of method for rapidly positioning of laser cutting part may further comprise the steps:

1) measures and sets up the laser cutting machine coordinate system: place a target at laser cutting head, measure the coordinate figure that the laser cutting machine initial point is in X, Y, three direction extreme value places of Z respectively, by target and laser generator position relative coordinate value conversion laser generator position coordinates, in laser tracker, set up the laser cutting machine coordinate system by the coordinate figure of the initial point place after converting and X, Y, three direction extreme value places of Z;

2) measure the part tooling physical location: part tooling is placed in the laser cutting machine, the position that design at least three places are used for placing target on the part tooling, use laser tracker to measure the target of placing on the part tooling, the relative actual coordinate value in the laser cutting machine coordinate system;

3) laser cutting part programming: in the laser cutting programming software, set up three points according to the relative actual coordinate value of measurement target drone, adjust the part tooling digital-to-analogue and make the theoretical digital-to-analogue of the interior target of frock digital-to-analogue overlap with three points of foundation, finish the location of frock digital-to-analogue;

4) back, location frock digital-to-analogue is carried out part cutting programming.

The core of this method is to utilize laser tracker to measure the actual origin position of laser cutting machine and X, Y, Z direction motion path, in laser tracker, set up the laser cutting machine coordinate system, placing at least 3 targets in part tooling is reflector, by the relative physical location of laser tracker measurement target drone in the laser cutting machine coordinate system, in the laser cutting programming software, adjust the position of part tooling digital-to-analogue according to the relative position coordinates value of measuring.This method fast, efficiently, accurately.

Claims (1)

1. the method for rapidly positioning of a laser cutting part is characterized in that may further comprise the steps:

1) measures and sets up the laser cutting machine coordinate system: place a target at laser cutting head, measure the coordinate figure that the laser cutting machine initial point is in X, Y, three direction extreme value places of Z respectively, by target and laser generator position relative coordinate value conversion laser generator position coordinates, in laser tracker, set up the laser cutting machine coordinate system by the coordinate figure of the initial point place after converting and X, Y, three direction extreme value places of Z;

2) measure the part tooling physical location: part tooling is placed in the laser cutting machine, the position that design at least three places are used for placing target on the part tooling, use laser tracker to measure the target of placing on the part tooling, the relative actual coordinate value in the laser cutting machine coordinate system;

3) laser cutting part programming: in the laser cutting programming software, set up three points according to the relative actual coordinate value of measurement target drone, adjust the part tooling digital-to-analogue and make the theoretical digital-to-analogue of the interior target of frock digital-to-analogue overlap with three points of foundation, finish the location of frock digital-to-analogue;

4) back, location frock digital-to-analogue is carried out part cutting programming.