CN201483161U

CN201483161U - Automatic focusing device

Info

Publication number: CN201483161U
Application number: CN 200920160205
Authority: CN
Inventors: 何成鹏
Original assignee: WUHAN SUNIC LASER EQUIPMENT MANUFACTURING Co Ltd
Current assignee: WUHAN SUNIC LASER EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2009-06-19
Filing date: 2009-06-19
Publication date: 2010-05-26
Anticipated expiration: 2019-06-19

Abstract

The utility model relates to a laser cutting and focusing device, in particular to an automatic focusing device. The automatic focusing device comprises a housing, a detecting head, a spray nozzle, a lens and a lens barrel, wherein the detecting head is connected with an input terminal of a converter, an output terminal of the converter is connected with the input terminal of a control box, and the output terminal of the control box is connected with a lifting device which is fixedly connected with the lens. The utility model has the advantages of simple structure, and can solve the vertical motion of a focusing lens and the accuracy rate of a laser bean effectively.

Description

A kind of automatic focusing device

Technical field

The utility model relates to a kind of laser cutting focus control.

Background technology

Laser cutting is to utilize the laser beam flying of high power density to cross material surface, in short time material is heated to several thousand to up to ten thousand degrees centigrade at the utmost point, make material fusing or gasification, will melt with gases at high pressure again or gasification substance blows away from joint-cutting, reach the purpose of cutting material.Laser cutting, owing to be to have replaced traditional mechanical blades with sightless light beam, the mechanical part and the workbench of laser probe are contactless, can not cause scuffing to working surface at work; Laser cutting speed is fast, and otch is smooth smooth, generally need not following process; The cutting heat affected area is little, and sheet deformation is little, joint-cutting narrow (0.1mm-0.3mm); Otch does not have mechanical stress, no shear burr; The machining accuracy height, good reproducibility does not damage material surface; Numerical control programming can be processed plane arbitrarily, and whole plate cutting that can be very big to breadth need not the die sinking tool, and economy saves time.

Laser cutting mainly is the CO2 laser cutting, the CO2 laser cutting is with focus lamp the CO2 laser beam to be focused on material surface to make the material fusing, use simultaneously with the coaxial Compressed Gas of laser beam and blow away the material that is melted, and make laser beam and material do relative motion, thereby form the joint-cutting of definite shape along certain track.The CO2 laser cutting technique than the obvious advantage of additive method is: cut quality is good, kerf width narrow (being generally 0.1-0.5mm), precision height (general hole centre-to-centre spacing error 0.1-0.4mm, overall size error 0.1-0.5mm), cut surface roughness good (general Ra be 12.5-25 μ m), joint-cutting does not generally need reprocessing to weld.Secondly cutting speed is fast, for example adopts the 2KW laser power, and the carbon steel cutting speed that 8mm is thick is 1.6m/min; The stainless steel cut speed that 2mm is thick is 3.5m/min, and the heat affected area is little, is out of shape minimum.Cleaning, safe, pollution-free has been improved operating personnel's working environment greatly once more.Certainly with regard to precision and cut surface roughness, the CO2 laser cutting can not surpass electric machining; With regard to cutting thickness, be difficult to reach the level of flame and plasma cutting.

Usually, the laser head of common laser cutting machine can only be done the motion of horizontal direction, and can not do the motion of vertical direction, as is cut the uneven thickness or the air spots of material, during cutting, laser head and the distance that is cut between the working face of object can change, the focusing focus of laser beam all the time on same horizontal plane, thereby cause the degree of depth inequality of indentation, and, the part that departs from the focusing focus of laser beam, owing to weakening of laser intensity, its effect that is cut also can be affected.So common laser cutting machine is poor to the applicability of different materials, can not guarantee the different quality requirement of different product.

Summary of the invention

The objective of the invention is to avoid the deficiencies in the prior art that a kind of laser cutting device is provided, it is simple in structure, has effectively solved moving both vertically and the accuracy rate of laser beam of laser head.

For achieving the above object, the technical scheme that the present invention takes is: a kind of automatic focusing device, include housing, detecting head, nozzle, lens, lens drum, detecting head is connected with the converter input, and converter output end is connected with the input of control box, the output of control box is connected with lowering or hoisting gear, and lowering or hoisting gear and lens are connected.

Further, described converter is located in the described housing.

Further, be provided with insulated ring above the described detecting head and between the described lens drum.

Further, described lowering or hoisting gear includes the motor that is located on the described housing, and the ball-screw that is provided with in motor and the housing is connected, and is provided with feed screw nut on ball-screw, and the nut seat and the lens of described feed screw nut are connected.

Further, described lens drum outer wall is provided with line slideway, and the nut seat of the feed screw nut of line slideway and described lowering or hoisting gear is connected.

The beneficial effects of the utility model are: it is simple in structure, has effectively solved moving both vertically and the accuracy rate of laser beam of condenser lens.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.

As shown in Figure 1, a kind of automatic focusing device that the utility model provides, include housing 1, detecting head 2, nozzle 3, lens 4, lens drum 5, detecting head is connected with converter 6 inputs, and converter 6 outputs are connected with the input of control box 7, the output of control box 7 is connected with lowering or hoisting gear 8, and lowering or hoisting gear 8 is connected with lens 4.Described converter 6 is located in the described housing 1.Be provided with insulated ring 9 above the described detecting head 2 and between the described lens drum 5.Described lowering or hoisting gear 8 includes the motor 81 that is located on the described housing 1, and the ball-screw 82 that is provided with in motor 81 and the housing 1 is connected, and is provided with feed screw nut 83 on ball-screw 82, and the nut seat of described feed screw nut 83 and lens 4 are connected.Described lens 4 drum outer walls are provided with line slideway 10, and line slideway 10 is connected with the nut seat of the feed screw nut 83 of described lowering or hoisting gear 8.

Detecting head 2 is used to survey the surface that is cut material and the distance between the optical fiber condenser lens, the variation of distance converts changes in capacitance to by converter 6, the signal frequency that changes in capacitance produces is sent to control box 7 after amplifying, the lowering or hoisting gear 8 of control box 7 control cutting systems, thereby can make lens 4 do motion on the vertical direction according to different needs, the distance that makes detecting head 2 and be cut between the working face of object remains stable, thereby the focusing focus that makes laser beam 11 drops on working face or the operating point all the time, guarantee different materials, different quality requirement during the cutting of different product.

The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. an automatic focusing device includes housing, detecting head, nozzle, lens, lens drum is characterized in that, detecting head is connected with the converter input, converter output end is connected with the input of control box, and the output of control box is connected with lowering or hoisting gear, and lowering or hoisting gear and lens are connected.

2. automatic focusing device as claimed in claim 1 is characterized in that described converter is located in the described housing.

3. automatic focusing device as claimed in claim 1 is characterized in that, is being provided with insulated ring above the described detecting head and between the described lens drum.

4. as any described automatic focusing device of claim 1 to 3, it is characterized in that, described lowering or hoisting gear includes the motor that is located on the described housing, the ball-screw that is provided with in motor and the housing is connected, be provided with feed screw nut on ball-screw, the nut seat and the lens of described feed screw nut are connected.

5. as any described automatic focusing device of claim 1 to 3, it is characterized in that described lens drum outer wall is provided with line slideway, the nut seat of the feed screw nut of line slideway and described lowering or hoisting gear is connected.