Off-center cutting method

Abstract

The invention provides an off-center cutting method. The off-center cutting method comprises the steps that parameter information of pipes and profiles is obtained; based on the parameter information and cutting requirements of the pipes and the profiles, off-center data sets of the cutting heads relative to different cutting positions of the centers of the pipes and the profiles are obtained; generating a cutting path based on the off-center data set; setting a cutting parameter set based on the cutting path; and based on the cutting positions of the pipes and the profiles, the corresponding cutting parameters in the cutting parameter set are matched, and the pipes and the profiles are cut. After the pipes and the profiles are placed in the cutting mechanism, the parameter information of the pipes and the profiles is directly obtained, the cutting path is generated, the cutting parameter set is generated, and off-center cutting is conducted on the pipes and the profiles, so that the tedious centering adjustment time after the pipes and the profiles are placed in the cutting mechanism is saved, the flow steps of centering adjustment are reduced, and the machining efficiency is improved. The preparation time before cutting is saved, the problem of material waste caused by improper centering adjustment is avoided, and the cutting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of off-center cutting of tubes and profiles, and in particular to an off-center cutting method. Background Art

[0002] The traditional cutting method usually fixes the tube or profile in the center of the cutting mechanism for cutting. Before cutting, the supporting mechanism needs to be adjusted to center the tube or profile. In the process of centering, a lot of time and manual debugging are often required to place the tube or profile in the center of the cutting mechanism. In the process of centering cutting, the operator needs to have high professional skills and experience, including measurement, positioning, use of fixtures, and operation of cutting tools. Improper operation may lead to reduced cutting accuracy or material waste. Although the centering cutting method is currently widely used in the fields of tube and profile processing and manufacturing, it may not be effective for cutting materials with complex shapes or uneven thicknesses. Therefore, how to overcome the current technical problems of complex centering operations for tubes and profiles, long preparation time, and material waste caused by improper centering adjustment has become a key issue that needs to be addressed. Summary of the invention

[0003] In order to overcome the problems of complicated centering operation of pipes and profiles, long pre-preparation time and material waste caused by improper centering adjustment in the prior art, the present application provides an off-center cutting method, which adopts the following technical solutions:

[0004] The present application provides a method for off-center cutting, and the specific method includes:

[0005] Get parameter information of tubes and profiles;

[0006] Based on the parameter information and cutting requirements of the tube and profile, obtain the off-center data set of different cutting positions of the cutting head relative to the center of the tube and profile;

[0007] generating a cutting path based on the off-center data set;

[0008] Setting a cutting parameter set based on the cutting path;

[0009] Based on the cutting position of the tube or profile, the corresponding cutting parameters in the cutting parameter set are matched to cut the tube or profile.

[0010] Furthermore, the obtaining of parameter information of the tube and profile includes: obtaining geometric parameters of the tube and profile and the position of the tube and profile in the cutting mechanism.

[0011] Furthermore, the position of the tube and profile in the cutting mechanism is obtained by a positioning device.

[0012] Furthermore, the position of the tube or profile in the cutting mechanism is obtained by a positioning device, wherein the positioning device includes a mechanical positioning device, machine vision positioning or sensor positioning.

[0013] Furthermore, the cutting head is provided with an eccentric rotating mechanism, and the eccentric rotating mechanism controls the cutting head to deviate along the central axis of the tube or profile.

[0014] Furthermore, the off-center distance is a value greater than or equal to 0.

[0015] Furthermore, the implementation method of generating a cutting path based on the off-center data set includes:

[0016] Obtaining the cutting starting point of the tube or profile;

[0017] Convert each point in the off-center data set into a coordinate point data set in a preset coordinate system;

[0018] Based on the cutting start point, the coordinate point data sets are connected to form a continuous cutting path.

[0019] This application has the following beneficial effects:

[0020] 1. This application can accurately obtain the geometric parameter information of the tubes and profiles and their position information in the cutting mechanism by automatically acquiring the parameter information of the tubes and profiles, and based on the above information, quickly adjust the cutting strategy to adapt to different processing requirements.

[0021] 2. The present application obtains off-center data sets at different positions of the cutting head relative to the center of the tube and profile based on the parameter information of the tube and profile. The present application reduces the operation steps of centering the tube and profile before cutting the tube and profile by obtaining the off-center data sets at different positions of the center of the tube and profile, thereby simplifying the cutting process. The off-center cutting method of the present application can perform a variety of cutting configurations based on the off-center data set during the cutting process to adapt to the cutting of materials of different shapes and sizes.

[0022] 3. The present application generates a cutting path based on the off-center data set; sets a cutting parameter set based on the cutting path; matches the corresponding cutting parameters in the cutting parameter set based on the cutting position of the tube or profile, and cuts the tube or profile; the present application places the tube or profile in a cutting mechanism, directly obtains the parameter information of the tube or profile, generates a cutting path and generates a cutting parameter set, and performs off-center cutting on the tube or profile, thereby saving the tedious centering adjustment time after the tube or profile is placed in the cutting mechanism, reducing the process steps of the centering adjustment, saving the preparation time before cutting, avoiding the problem of material waste due to improper centering adjustment, and improving the cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of the off-center cutting method according to an embodiment of the present application;

[0024] Figure 2 A flow chart for generating an off-center cutting path for an embodiment of the present application;

[0025] Figure 3 A flow chart of cutting according to matching cutting parameters according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] refer to Figure 1 , the figure shows a flow chart of an off-center cutting method of the present application, the method comprising the following steps:

[0030] Step S101, obtaining parameter information of tubes and profiles.

[0031] In the embodiment of the present application, the obtaining of parameter information of the tube and profile includes: obtaining geometric parameters of the tube and profile and the position of the tube and profile in the cutting mechanism.

[0032] In the embodiment of the present application, the geometric parameters of the tube or profile may be acquired before entering the cutting mechanism, or may be acquired after entering the cutting mechanism.

[0033] In an embodiment of the present application, the acquisition of geometric parameters of the tube and profile includes scanning the tube and profile using a three-dimensional scanner to acquire its geometric parameters. The geometric parameters include, but are not limited to, the size parameters, shape parameters, geometric feature parameters, surface feature parameters, and spatial geometric parameters of the tube and profile. The size parameters include the length, width, height, diameter, radius, and the like of the tube and profile; the shape parameters include the roundness, angle, straightness, flatness, and the like of the tube and profile; the geometric feature parameters include the holes, grooves, cut corners, threaded holes, buckles, and the like of the tube and profile; the surface feature parameters include the roughness and curvature of the tube and profile; the spatial geometric parameters include the spatial resolution of the tube and profile, which is a parameter that describes the distance between two adjacent points in the three-dimensional data acquired by the scanner.

[0034] In the embodiment of the present application, the position of the tube and profile in the cutting mechanism is obtained by a positioning device.

[0035] In an embodiment of the present application, the position of the tube or profile in the cutting mechanism is obtained by a positioning device, wherein the positioning device includes a mechanical positioning device, machine vision positioning or sensor positioning.

[0036] For example, the specific implementation method of obtaining the position of the tube or profile in the cutting mechanism by means of a mechanical positioning device is as follows: fixing the tube or profile by means of a mechanical guide rail or a clamp, and reading the coordinates of the tube or profile to obtain its position.

[0037] For example, the specific implementation method of obtaining the position of the tube or profile in the cutting mechanism through machine vision positioning is: obtaining the image of the tube or profile in real time through a camera, and identifying the position of the tube or profile based on an image processing algorithm.

[0038] For example, a specific implementation method of obtaining the position of the tube or profile in the cutting mechanism through sensor positioning is: detecting the position of the tube or profile based on a preset sensor (such as an infrared sensor or an ultrasonic sensor).

[0039] In an embodiment of the present application, the acquired geometric parameters and positions of the tube and profile are integrated to form a parameter information set, and the parameter information set is output and stored in a preset format (such as JSON or XML, etc.).

[0040] Step S102, based on the parameter information and cutting requirements of the tube and profile, obtain the off-center data set of different cutting positions of the cutting head relative to the center of the tube and profile.

[0041] In the embodiment of the present application, in the process of cutting tubes and profiles, there are different cutting requirements, and each cutting requirement corresponds to an off-center data set. In the process of data storage, a unique code is generated for each cutting requirement, and the code corresponding to the cutting requirement is bound and stored with the off-center data set. In the cutting process, based on the cutting requirement, the code corresponding to the cutting requirement and the bound off-center data set are obtained, and the off-center data set is processed to achieve the cutting of tubes and profiles.

[0042] In the embodiment of the present application, the cutting head is provided with an eccentric rotating mechanism, and the eccentric rotating mechanism controls the cutting head to deviate along the central axis of the tube or profile. For example, the eccentric rotating mechanism can use a servo motor and a precision screw or gear transmission system.

[0043] In the embodiment of the present application, during the cutting process, the eccentric rotating mechanism controls the cutting head to offset along the central axis of the tube or profile according to the offset parameter by receiving the offset parameter sent by the control unit.

[0044] In an embodiment of the present application, the off-center data set of the cutting head at different positions relative to the center of the tube and profile is obtained based on the parameter information of the tube and profile. The off-center data set of the cutting head at different positions relative to the center of the tube and profile can be obtained through a preset geometric formula; or a three-dimensional model of the tube and profile can be constructed based on the parameter information of the tube and profile, and the off-center distances of different positions can be recorded during each cutting process by simulating cutting of the three-dimensional model.

[0045] In the embodiment of the present application, multiple cutting positions (for example, positions along the length, circumference, etc. of the pipe or profile) are set based on the cutting requirements. For each cutting position, the coordinate position (x1, y1, z1) of the cutting head is recorded, and the eccentric distance data d is obtained based on a preset formula. The preset formula is: Among them, (x1, y1, z1) represents the actual position coordinates of the cutting head in three-dimensional space, and (x2, y2, z2) represents the coordinates of the geometric center of the tube and profile. Among them, x1 represents the coordinate value of the cutting head on the x-axis, y1 represents the coordinate value of the cutting head on the y-axis, and z1 represents the coordinate value of the cutting head on the z-axis; x2 represents the coordinate value of the geometric center of the tube and profile on the x-axis, y2 represents the coordinate value of the geometric center of the tube and profile on the y-axis, and z2 represents the coordinate value of the geometric center of the tube and profile on the z-axis; among them, the x-axis represents the horizontal left and right direction, the y-axis represents the vertical up and down direction, and the z-axis represents the front and back depth direction.

[0046] In the embodiment of the present application, the eccentric distance is a value greater than or equal to 0. When the center of the tube or profile coincides with the center of the cutting mechanism, the eccentric distance is a value equal to 0, and when the center of the tube or profile does not coincide with the center of the cutting mechanism, the eccentric distance is a value greater than 0. The eccentric distance value in the present application is greater than or equal to 0, which supports both cutting when the center of the tube or profile coincides with the center of the cutting mechanism and cutting when the center of the tube or profile does not coincide with the center of the cutting mechanism.

[0047] Step S103, generating a cutting path based on the off-center data set.

[0048] In the embodiment of the present application, the implementation method of generating the cutting path based on the off-center data set is as follows. Figure 2 , including:

[0049] Step 21, obtaining the cutting starting point of the tube or profile;

[0050] Step 22, based on the cutting starting point and the corresponding cutting requirements, obtain the cutting head coordinate position corresponding to each cutting position, and obtain a coordinate point data set that meets the corresponding cutting requirements;

[0051] Step 23: Based on the cutting starting point, connect the coordinate point data sets to form a continuous cutting path.

[0052] In the embodiment of the present application, the cutting path includes a straight line, a curve or other complex shapes.

[0053] In an embodiment of the present application, when the cutting path is a straight line, the coordinate points in the coordinate point data set are connected in sequence to form a straight line cutting path; when the cutting path is a curve or other complex shape, the coordinate point data set is curve fitted based on a preset curve fitting algorithm to obtain a smooth curve as the cutting path.

[0054] Step S104, setting a cutting parameter set based on the cutting path.

[0055] In an embodiment of the present application, the cutting path is converted into a format recognizable by a CNC cutting device, such as a G code.

[0056] In an embodiment of the present application, different cutting stages are obtained based on the cutting path, and the different cutting stages include the cutting starting point, the cutting end point and key points on the cutting path (corners, joints, etc.); sub-cutting parameter sets are created based on the different cutting stages, and the sub-cutting parameter sets of different cutting stages are integrated to obtain a cutting parameter set that satisfies the cutting path.

[0057] Explanation: Different cutting parameters are required for different cutting stages. The cutting parameters include but are not limited to laser power, cutting speed, focal length, auxiliary gas type and pressure, etc.

[0058] In the embodiment of the present application, a mapping relationship table between different cutting positions and their corresponding sub-cutting parameters is constructed.

[0059] Step S105, based on the cutting position of the tube or profile, the corresponding cutting parameters in the cutting parameter set are matched to cut the tube or profile.

[0060] In the embodiment of the present application, the cutting position of the tube or profile is matched with the corresponding cutting parameters in the cutting parameter set to cut the tube or profile. Please refer to Figure 3 , specifically:

[0061] Step 31, obtaining the real-time position of the tube or profile. For example, the position of the cutting head on the tube or profile can be monitored in real time by a laser sensor, a position encoder, etc.

[0062] Step 32, determining the current cutting position of the tube or profile based on the real-time position.

[0063] Step 33, based on the cutting position of the current tube or profile and the corresponding sub-cutting parameter mapping relationship table, matching the cutting parameters corresponding to the cutting position of the current tube or profile.

[0064] Step 34, controlling the cutting head based on the matched cutting parameters to cut the tube or profile.

[0065] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the aforementioned storage medium can be a non-volatile storage medium such as a disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0066] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0067] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0068] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. An off-center cutting method, characterized in that: include: Get parameter information of tubes and profiles; Based on the parameter information and cutting requirements of the tube and profile, obtain the off-center data set of different cutting positions of the cutting head relative to the center of the tube and profile; generating a cutting path based on the off-center data set; Setting a cutting parameter set based on the cutting path; Based on the cutting position of the tube or profile, the corresponding cutting parameters in the cutting parameter set are matched to cut the tube or profile.

2. The off-center cutting method according to claim 1, characterized in that: The obtaining of the parameter information of the tube and the profile includes: obtaining the geometric parameters of the tube and the profile and the position of the tube and the profile in the cutting mechanism.

3. The off-center cutting method according to claim 2, characterized in that: The position of the tube and profile in the cutting mechanism is obtained by a positioning device.

4. The off-center cutting method according to claim 3, characterized in that: The position of the tube or profile in the cutting mechanism is obtained by a positioning device, wherein the positioning device includes a mechanical positioning device, a machine vision positioning device or a sensor positioning device.

5. The off-center cutting method according to claim 1, characterized in that: The cutting head is provided with an eccentric rotating mechanism, and the eccentric rotating mechanism controls the cutting head to deviate along the central axis of the pipe and the profile.

6. The off-center cutting method according to claim 1, characterized in that: The implementation method of generating a cutting path based on the off-center data set includes: Obtaining the cutting starting point of the tube or profile; Based on the cutting starting point and the corresponding cutting requirements, the coordinate position of the cutting head corresponding to each cutting position is obtained, and based on the coordinate position of the cutting head, a coordinate point data set that meets the corresponding cutting requirements is obtained; Based on the cutting start point, the coordinate point data sets are connected to form a continuous cutting path.

7. The off-center cutting method according to claim 1, characterized in that: The method of cutting the tube or profile based on the cutting position of the tube or profile, matching the corresponding cutting parameters in the cutting parameter set, and cutting the tube or profile specifically includes: Get the real-time position of tubes and profiles; Determine the current cutting position of the tube or profile based on the real-time position; Based on the cutting position of the current tube or profile and the corresponding sub-cutting parameter mapping relationship table, matching the cutting parameters corresponding to the cutting position of the current tube or profile; The cutting head is controlled based on the matching cutting parameters to cut the tubes and profiles.

Images