A cascade mechanism in laser processing process

Abstract

The invention is a kind of series mechanism in a kind of laser process technology, which can realize the adjustment of relative posture and position of laser head and piece, the merits lie in: it can realize aplanatism process, the reflected times of laser beam is little, the energy loss is small, the control is convenient. The series mechanism is made up of several light arm through rotary junctions, finally, a light arm and laser head are connected, two light arms are connected through a rotary junction, there only has a reflecting mirror in the rotary junction, the control system control the rotary junction to rotate, makes the two light arms to rotate relatively, thus adjusts the space position of each light arm, finally realizes the adjustment of final posture and position of piece relative to the laser head, the invention uses robot arm control system as the control system of the whole three-dimension series mechanism space movement; each rotary junction in the series mechanism sets a reflecting device, the mirror adjusting mechanism and rotary junction of the reflecting device are coupled together, rotates according to some function relation with the rotary junction, thus adjusts the space position reflecting mirror, maintains the laser beam advancing along the light arm axis direction after the reflected by the mirror.

Description

Technical field [0001] The invention relates to a tandem mechanism in laser processing technology. The three-dimensional tandem mechanism can conveniently realize the adjustment of the final relative posture and position of a laser head and a workpiece during laser processing, and can ensure high-precision, equal optical path processing. Background technique [0002] At present, in the field of solid-state laser medical applications, the multi-light guide arm series technology is generally adopted. The right-angle relationship between each adjacent two light guide arms remains unchanged, and a rotary joint is used to connect the two. The light guide arm can rotate around its own axis. The movement of one or more such rotary joints, so as to realize the adjustment of the final relative posture between the laser head and the workpiece, is recorded as mechanism one; in the industrial application field of high-power laser processing (especially gas laser processing such as CO2), ...

AI Technical Summary

Problems solved by technology

The technologies used by these two commonly used mechanisms have the following problems: 1. Mechanism 1 adopts the multi-light guide arm series technology, and the right-angle relationship between each adjacent two light guide arms remains unchanged, and the light guide arms can only wrap around themselves. The axis of the axis rotates, which determines that the angle between any two adjacent light guide arms will not change, only the angle between two non-adjacent light guide arms will change, so it is necessary to achieve flexible space posture Changes will inevitably lead to an increase in the number of revolving joints and the number of mirrors installed on the revolving joints for reflection, and the loss of laser energy is large; 2. Mechanism 2 uses the technology of parallel sliding of the laser head along the direction of the space guide rail to realize the adjustment of the spatial position , since the length of the light guide arm in the three directions of the X, Y and Z axes changes with the parallel sliding of the laser head along the guide rails in the three directions of the X, Y and Z axes, the changes in the length of the light guide arm in each direction are accumulated together It will become a large amount of variation, so that the actual stroke of the laser beam in the light guide arm has a large amount of variation. In laser processing, it cannot be guaranteed that the entire processing process is equal optical path processing, and after the shortest optical path There will be a large error between the diameter of the laser spot that comes out last and the diameter of the laser spot that comes out after the longest optical path, and it is difficult to ensure that it meets the requirements of precise processing; Adjusting the spatial position of the laser head cannot adjust the spatial attitude of the laser head, and to make the laser head have a larger spatial position adjustment range, it is necessary to make a correspondingly large-sized guide rail, which takes up a lot of space and wastes materials.

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