Device for determining cutting parameters of objects by focused laser beam

FIELD: testing engineering.

SUBSTANCE: device comprises optical quantum generator, system for focusing the laser beam with the unmovable lens, and movable base for securing the object to be cut. The movable base is made of rotating platform mounted on the driving shaft of the mechanism for discrete control of the speed of rotation. The mechanism is made of an assembly of driven and driving pulleys connected by means of the driving belt. The rotating platform is provided with the model of the object to be cut. The driving belt that connects the driven and driving pulleys is made of a vibration insulation material. The driven shaft of the rotating platform is set in bearings, is provided with a mechanism for control of tension of the driving belt, and is mounted on the traverse gear.

EFFECT: decreased time and reduced power consumption of testing.

1 cl, 2 dwg

 

The invention relates to the field of test equipment, and more particularly to devices that studies the processes of laser beams on different objects.

Numerous devices for influencing the object to be processed with a laser beam. However, some types of lasers have significant beam divergence angle and require focus. Known for such devices [1, 2], consisting of an optical quantum generator generating a laser beam for processing object, and a device for focusing the beam on the object using a movable lens. This same device is used for monitoring the action processing.

A disadvantage of this device is the impossibility of carrying out of actions on the object when the surrounding conditions, which differ from naturally-aspirated. For example, is widely practiced laser cutting or laser perforation of materials in oxygen or, on the contrary, in a neutral environment.

A device for determining cutting parameters of interest focused laser beam [3]was chosen as a prototype and is shown in figure 1, which contains an optical quantum generator 1, the focusing laser beam with movable lenses 2 system 3 and the movable base 4 for fixing the cut object 5. To determine the optimal near the STI cutting used the same device and a variety of sample materials, mounted on a movable base.

A significant drawback of such devices is that to select the cutting speed required a large number of experiments, spent a great time and spent a lot of electricity.

Object of the present invention to provide such a device for determining cutting parameters of interest focused laser beam, which would reduce time and cost of electricity for testing.

The technical result is achieved in that the device for determining cutting parameters of interest focused laser beam containing optical quantum generator, focusing the laser beam using a movable lens system and movable base for fixing the cut object, in contrast to the known movable base is made in the form of a rotating platform mounted on the driven shaft of the mechanism of discrete control speed, made in the form of a set of connected drive belt driven and driving pulleys, rotating platform strengthened as the cut object model object, and a drive belt connecting the master and slave pulleys, made of vibration damping material and driven shaft rotating platform needle bearing installed in the literature and provided a mechanism for regulating the tension of the belt and mounted on the jig device.

The essence of the invention is illustrated by drawings on which is shown:

figure 1 - diagram of the device of the prototype;

figure 2 - General view of the proposed device for determining cutting parameters of interest focused laser beam;

The device for determination of cutting parameters of interest focused laser beam includes an optical quantum generator 1, the focusing laser beam with movable lenses 2 system 3 and the movable base 4 on which it is proposed to consolidate the quality of the cut object 5 object model. When this movable base 4 is made in the form of a rotating platform mounted on driven shaft 6 of a discrete mechanism for adjusting the speed of rotation is made in the form of a set of connected drive belt 7 slave 8 and 9 leading pulleys and drive belt 7 connecting slave 8 and 9 leading pulleys, made of vibration damping material, and the driven shaft 6 rotating platform mounted in bearings 10, leading pulleys mounted on the shaft 11 of the synchronous motor 12.

Driven shaft 6 is equipped with a mechanism for regulating the tension of the belt 7, is made in the form of a latch 13, the regulating wheel 14 and the coupling 15. All of these elements combines housing 16 mounted on the coordinate device 17.

On the movable base 4 made in view of the rotating platform, fix the cut sample 5, which take the model of the cut sample is preferably round in shape. The rotating platform is mounted on driven shaft 6, on which is installed a set of driven pulleys 8 of different diameters. A mechanism for regulating the tension of the drive belt loosen the drive belt tension 7, put it on the pulleys with the selected gear ratio by setting a certain number of revolutions of the model of the cut sample, and thus, by setting the linear speed of movement of the surface of the model relative to the laser beam. Adjust the belt tension 7 flywheel 14 and hold it in position using the latch 13. Include synchronous motor 12 with a constant number of revolutions, which shaft 11 causes the rotation of the wheel pulleys 9, which through a belt 7 transmit the rotation of the driven pulleys 8 and respectively movable base 4 and the model of the cut object 5. Then include a focusing device 3, covering the place in which will be the focus of the laser beam and measure the radius of the focus of the laser beam relative to the axis of rotation of the model 5. Then include optical quantum generator 1 and affect model 5 focused laser beam. After that switch off the optical quantum generator 1, switch off the engine 12, loosen the clamp 13 and using Maho is the IC 14 and the clutch 15 weaken the tension of the belt 7, bring it on slave 8 and 9 leading pulleys with a different gear ratio. And the process repeats.

The present invention can be realized by using the following tools:

As quantum generator was used industrial unit "quantum-15"with the energy range of the laser beam from 8 to 15 j, the power of the laser from 1.4 to 2.6 million watts/cm2pulse duration of from 2 to 5 MS, the wavelength of the laser radiation of 1.06 μm, the maximum pulse repetition rate up to 20 Hz, the focal length of the laser head 50 and 100 mm, the diameter of the adjustable light spot in the focal plane: 0,3+0,2-1,3-0,2mm

The speed of a motor powered by AC 220V, constant and equal to about 20/s Ratio pulleys: 2,037; 1,0; 0,491.

The range of radii of the laser beam on the model of the object to be processed from 0,015 0,027 to meters

The range of the tangential velocities on the model of the object to be processed: 1,88-6,91 m/s, and taking into account the possibility of carrying out work stopped on the model: 0; 1,88-6,91 m/S.

The present invention can be implemented to define the parameters and modes of laser cutting of sheet and film materials; determination of parameters and modes of fire and explosion safety laser cutting of sheet and film flammable materials in susnow environment; research work on the above areas.

Literature:

1. Nil, APA, Angicor. Laser processing of materials. M: mechanical engineering, 1975, s.

2. Aggregations. Fundamentals of laser material processing. M.: Mashinostroenie, 1989, p.15.

3. U.S. patent No. 4381441 Method and installation for laser trimming of thin film resistors. MCI: 23 To 26/00. Publication from 26.04.1983, prototype.

The device for determination of cutting parameters of interest focused laser beam containing optical quantum generator, focusing the laser beam using a movable lens system and movable base for fixing the cut object, characterized in that the movable base is made in the form of a rotating platform mounted on the driven shaft of the mechanism of discrete control speed, made in the form of a set of connected drive belt driven and driving pulleys, and drive pulley is mounted on a shaft of the synchronous motor, and the rotating platform strengthened as the cut object model of the object, while the drive belt connecting the master and slave pulleys, made of damping fluctuations of the material, and a driven shaft rotatable platform mounted in bearings provided with a mechanism for regulating the tension of the belt and placed the and coordinate the device.



 

Same patents:

FIELD: laser welding equipment.

SUBSTANCE: as welding tool laser beam is used. Number of welding point, current position, seam length or melting space are identified by counting signals of welding process presence and comparing these to supporting time counts. Number of welded seam is identified on basis of welding stop signal or open seam edge signal or closed seam edge signal appropriately for welding technology. Number of welded product is identified on basis of number of welded seams and/or lengths thereof. Probability of occurrence of non-solidity defects or reasons of decrease of laser equipment nodes resource are determined for current welding technology on basis of equality or exceeding of sixth threshold value by total signal It. exceeding of edges of welded parts is determined by threshold amplitude selection of signals Ii of welded parts, tracked appropriately for current welding technology from front and sides of joint trajectory. Actual or possible from pre-threshold comparison reasons of defect are identified on basis of appearance of signals of threshold or pre-threshold unacceptable excesses of edges, deviations from joint, space width, decreases of laser emission intensiveness levels, amplitude, length, frequency of intensiveness signals of laser charge, increase of welding speed or unacceptable changes of laser spot diameter. Actual or pre-threshold based possible reasons of overheating and exhausts are identified on basis of appearance of signals of threshold or pre-threshold levels of unacceptable excesses of intensiveness of laser emission, amplitude, length, frequency of signals of laser charge, decrease of welding speed and unacceptable changes of laser spot diameter. Appropriately for current welding technology signals of unacceptable signal states and their actual or possible reasons are recorded for corrections of welding process in real time scale or re-welding of defect portion or stopping process in case of long disruption of optimal welding process and signals for automatic control of laser welding process are formed by adaptive amplitude change, laser charge length, welding speed, pulses frequency and laser emission focusing. Device is provided with laser block with laser beam intensiveness indicator, laser charge current indicator, positioned in power source block, and electronic synchronization block. Operation block is electrically connected by input and output to infrared converter through electronic

synchronization block, which is connected to input and output of control block, laser charge current indicator and laser beam intensiveness indicator. Infrared converter is made with possible orientation by areas of surfaces adjacent areas tracking areas, positioned along drive of relative movement of laser beam along joint, in front and on the sides of joint trajectory or relatively to beam axis for controlling approaches to seam edge, to ending of seam of solid metal of closed edge and to ending of seam of edge of closed edge, vicinity of surface of heat track of formed welding tub, vicinity of surface of laser spot focusing, vicinity of heat tracks of controlled laser block surfaces for diagnosing their abnormal modes of operation and deviations.

EFFECT: higher quality, lower costs, higher speed of operation, higher personnel safety, higher efficiency.

2 cl, 1 dwg

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