The invention provides a three-dimension laser fine machining system and method for crisp and hard materials. The method comprises the steps that a laser scanning machining scheme according to the model of a to-be-machined part, the model of a machining pattern and the machining requirements, specifically, the scheme comprises the process of determining the laser machining parameters and the process of determining the number of machining layers; scanning filling schemes corresponding to the machining layers are made in the pattern filling area; the laser focus is adjusted dynamically in the machining process, light spots are made to keep focusing in each machining position, and focus spots are uniform and coincident; the laser scanning filling schemes are changed every time one or more layers of materials are scanned and removed; and after one or more layers are scanned in the pattern filling area, laser contour scanning is conducted in the pattern contour area one or more times. The three-dimension laser fine machining system and method for the crisp and hard materials can achieve high-precision and efficient machining of the crisp and hard materials by making full use of the various advantages of fine light spot laser scanning machining.

Three-dimension laser fine machining system and method for crisp and hard materials

The invention provides a laser drilling device for a transparent brittle material and a drilling method of the laser drilling device. The laser drilling device comprises a laser light source, a laserbeam emitted by the laser light source, a scanning galvanometer system, a short focus focusing mirror system positioned below the scanning galvanometer system and a material fixing assembly for fixingthe transparent brittle material. The focal plane where the short focus focusing mirror system is located is parallel to the plane where the material fixing assembly is located. By the adoption of the laser drilling device, lasers are precisely focused on the lower surface of the transparent brittle material through the short focus focusing mirror system, and focused laser spots move rapidly andcircularly according to a preset pattern track to form a drilling and cutting gap with a certain width and depth. The laser drilling device and the drilling method mainly use a fast zoom system to accurately and quickly control the short focus focusing mirror system to focus the deep laser spots so as to remove materials in time.

Laser drilling device for transparent brittle material and drilling method of laser drilling device

The invention relates to a method and a device for identifying the front and back surfaces of a bamboo filament or a bamboo sheet. According to the characteristic that one surface of the bamboo filament or the bamboo sheet is flat and the other surface is arc-shaped or is provided with a groove, horizontal straight line laser irradiates the front and back surfaces of the same position of the bamboo filament or a certain surface of the bamboo sheet in an inclined manner at a small angle, and the horizontal straight line of the laser is in the transverse direction of the bamboo filament or the bamboo sheet; if the irradiated surface is flat, a straight line type light spot can be formed on the surface by the laser; when the irradiated surface is arc-shaped or is provided with the groove, a light spot pattern formed on the surface by the laser is a curved; therefore, the front and back surfaces of the bamboo filament or the bamboo sheet can be identified by analyzing the shape of the light spot by using a digital image processing method. Aiming at the problems of narrow application range, low interference resistance and low reliability of the existing method for identifying the front and back surfaces of the bamboo filament or the bamboo sheet, the invention provides a method and a device which are used for identifying the front and back surfaces and are wide in application range, high in interference resistance and high in accuracy for automatic production of bamboo mats or bamboo majiong mats.

Method and device for identifying front and back surfaces of bamboo filament or bamboo sheet

The invention relates to the technical field of laser cutting, in particular to a laser cutting method. The planning strategy for the laser cutting path comprises the following steps: (1) automatically layering cut files; and (2) establishing a cutting list. According to the planning strategy disclosed by the invention, due to the adoption of the technical scheme, the problem of imperfect cutting quality of small openings in the laser cutting process is solved.

Planning strategy for laser cutting path

The invention provides a portable type laser distance device. The portable type laser distance device comprises a bearing piece, a light spot receiving module and a data processing module. The light spot receiving module is fixed on the front face of the bearing piece and used for receiving light spot images which illuminate on the light spot receiving module and are used for laser distance assisting. The data processing module is arranged in the bearing piece and used for computing an area value of light spots received by the light spot receiving module, subtraction is carried out on the area value and a pre-stored area value, then a difference value is obtained, and the difference value is related to defocusing amount of the current position. The portable type laser distance device avoids the trouble that the defocusing amount in the process of laser processing is determined by repeated ruler measurement and greatly improves processing accuracy.

Portable type laser distance device

The invention discloses a ranging and focusing method for laser cutting processing, and the key point is that the side of a cutting laser head is provided with a parallel light generator, a concave lens and a camera which are synchronously driven. The concave lens amplifies the light spot of the parallel light generator and projects the light spot on the surface of a work piece, the camera collect the light spot image, and then the cutting processing is carried out along with the cutting laser beam; the light spot is always projected in the front of the moving direction of the work piece, thelight spot image changes along with the fluctuant change of the work piece surface, the camera samples the light spot image in real time, and the sampled light spot image and a standard light spot image are compared by a data processor, thus obtaining the deformation amount of the surface waiting to be cut of the work piece; and according to the deformation amount, the data processor sends out control signals, drives and regulates a focus lifting device, and changes the distance between the cutting laser head and the work piece, thus keeping accurate focusing with the work piece. The method has the advantages of high focusing accuracy, agile response and strong adaptability to the surface of the processed work piece, low and practical cost, high cutting efficiency, and the like.

Distance-measurement focusing method applied for laser cutting processing

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Distance-measurement focusing method applied for laser cutting processing