Automatic focusing device for laser cutting machine
By designing an automatic focus device in a laser cutting machine, and using the camera system to automatically detect the nozzle position and adjust it, the laser beam deviation problem is solved, the efficiency and accuracy of light deviation correction is improved, and personal safety is ensured.
Patent Information
- Application Number
- CN202422131150.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-30
AI Technical Summary
During the long-term processing of existing laser cutting machines, due to the high-speed vibration of the laser head and the changes in optical characteristics after the lens is heated, the laser beam deviates from the center of the nozzle, and requires manual light deviation correction, which is dangerous, inaccurate and unpredictable.
An automatic focus device is designed, including a nozzle, a centering station and a camera system. The camera is installed in the chassis, and the camera is operated and protected by an automatic flip plate and a flip motor. The camera system is used to automatically detect the nozzle position, calculate the offset value and adjust the nozzle by moving the centering station.
The operation efficiency of light bias correction is improved, the contact between people and lasers is avoided, personal safety is ensured, beam adjustment is quantified, adjustment accuracy is improved, and beam deviation correction operation is simplified.
Smart Images
Figure CN222944709U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of laser cutting machines, and in particular relates to an automatic focusing device for laser cutting machines. Background Art
[0002] In the field of machine tool cutting, during the long processing of the laser cutting head, due to the high-speed vibration of the laser head and the subtle changes in the optical properties of the lens after heating, the laser beam often deviates from the original center position of the nozzle, which will lead to a decrease in the laser processing effect. In severe cases, the nozzle or even the laser cutting head will be burned. Therefore, when the laser beam is offset, it is necessary to manually correct the light polarization to return the laser beam to the center position of the nozzle. Before correcting the light polarization, the operator needs to obtain the direction and distance of the laser beam deviating from the center of the nozzle. At present, the method of obtaining the direction and distance of the laser beam deviating from the center of the nozzle is to stick a small piece of transparent tape under the nozzle, and then use a low-power laser to point, leaving a laser burn mark on the tape and a circular mark at the bottom of the nozzle. The deviation value of the beam can be roughly obtained by comparing with the human eye through a reflector, and then corrected by adjusting the handheld terminal. However, this method has the following disadvantages:
[0003] 1. If the laser emits abnormal light during the manual tape pasting process, it will cause serious harm to the operator and pose a great risk;
[0004] 2. Judging the beam deviation based on visual observation by the human eye can only get the approximate distance and direction, resulting in inaccurate correction. Therefore, it is necessary to perform multiple beam markings to observe the change pattern. The overall light deviation correction process is extremely complicated.
[0005] 3. This method is greatly influenced by human subjectivity, cannot be quantified, has low accuracy, and will lead to a certain degree of unpredictability in the correction process. Utility Model Content
[0006] The utility model aims to provide an automatic focusing device for a laser cutting machine to solve the problems existing in the background technology.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic focusing device for a laser cutting machine, comprising a nozzle, a centering station is provided below the nozzle, a camera system is provided below the centering station, the camera system comprises a chassis and a camera, the camera is installed in the chassis and directly opposite to the bottom of the nozzle.
[0008] Preferably, the upper part of the chassis is opened and provided with an automatic flap, one side of the automatic flap is hinged to one side of the opening through a hinge, the other side of the automatic flap is hinged to one end of a first connecting rod, the other end of the first connecting rod is hinged to one end of a second connecting rod, the other end of the second connecting rod is connected to the output end of a flip motor, and the flip motor is installed on the chassis.
[0009] Preferably, a protective cover is provided between the centering station and the chassis.
[0010] The beneficial effects of the utility model are as follows: the device automatically detects the position of the nozzle through the camera system, and according to the deviation, the machine tool moves the nozzle with the help of the centering station, thereby improving the efficiency of light deflection correction, avoiding contact between people and lasers, ensuring personal safety, and the device can quantify the light beam adjustment, improve the adjustment accuracy, and simplify the light beam correction operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 A three-dimensional diagram of the utility model in one direction;
[0012] Figure 2 It is a three-dimensional diagram of the utility model from another direction;
[0013] Figure 3 A three-dimensional diagram of the camera system in one direction of the present invention;
[0014] Figure 4 It is a stereoscopic diagram of the camera system in the present invention from another direction. DETAILED DESCRIPTION
[0015] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.
[0016] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.
[0017] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.
[0018] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings and preferred embodiments.
[0019] like Figure 1 and Figure 2 As shown, an automatic focusing device for a laser cutting machine comprises a nozzle 1, a centering station 2 is provided below the nozzle, and a camera system 3 is provided below the centering station. Figure 3 and Figure 4 As shown, the camera system includes a chassis 31 and a camera 32, which is installed in the chassis and directly below the nozzle. First, in order to determine the offset of the nozzle center, the cutting head moves to the centering station. The automatic flap opens and the camera determines the position of the guide laser without lighting. Next, the camera with LED lighting starts to take pictures of the cutting nozzle. The software relies on the image to calculate the offset value of the nozzle centering. The cutting head releases the lock of the nozzle body and moves in the X and Y directions according to the calculated values. Finally, the cutting head activates the lock of the nozzle body and moves the cutting head out of the centering station.
[0020] In order to protect the camera, the upper part of the case is opened and provided with an automatic flap 33, one side of the automatic flap is hinged to one side of the opening through a hinge shaft, the other side of the automatic flap is hinged to one end of a first connecting rod 34, the other end of the first connecting rod is hinged to one end of a second connecting rod 35, the other end of the second connecting rod is connected to the output end of a flip motor 36, and the flip motor is installed on the case. When the camera needs to work, the flip motor works, drives the second connecting rod to swing, the second connecting rod drives the first connecting rod to move, and the first connecting rod makes the automatic flap flip upward with the hinge shaft as the axis, so that the camera leaks out, and the camera determines whether it is offset by irradiating the nozzle position.
[0021] Furthermore, a protective cover 4 is provided between the centering station and the chassis to block light and effectively prevent the camera from being exposed.
[0022] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.
Claims
1. An automatic focusing device for a laser cutting machine, comprising a nozzle, characterized in that: A centering station is provided below the nozzle, and a camera system is provided below the centering station. The camera system comprises a chassis and a camera. The camera is installed in the chassis and directly faces below the nozzle. The camera is used to detect the position of the nozzle.
2. The automatic focusing device for a laser cutting machine according to claim 1, characterized in that: The upper part of the chassis is opened and provided with an automatic flap, one side of the automatic flap is hinged to one side of the opening through a hinge shaft, the other side of the automatic flap is hinged to one end of a first connecting rod, the other end of the first connecting rod is hinged to one end of a second connecting rod, the other end of the second connecting rod is connected to the output end of a flip motor, and the flip motor is installed on the chassis.
3. The automatic focusing device for a laser cutting machine according to claim 1, characterized in that: A protective cover is provided between the centering station and the chassis.