Laser cutting equipment and laser cutting debugging method

Abstract

The present application provides a laser cutting device including: a program path module; a main control module, connected to the cutting head control, connected to the infrared receiver, used to control the cutting action of the cutting head; a probe, installed on the side wall of the cutting head, provided with an infrared transmitter for intermittently transmitting infrared signals, the infrared transmitter is infraredly connected to the infrared receiver, before the cutting head moves, the main control module controls the cutting head and then controls the probe to try to touch the feature point from a position close to the feature point, and disconnects the infrared transmitter to transmit infrared signals when touching; a coordinate measurement module, connected to the main control module, used to obtain the actual coordinate value of the cutting head feature point in the cutting device; a detection module, connected to the program path module, connected to the main control module. While saving costs, accurate positioning, ensuring product accuracy, product detection and debugging are faster and more convenient.

Description

Technical Field

[0001] The present application belongs to the field of automated processing, and specifically relates to a laser cutting device and a laser cutting debugging method. Background Art

[0002] Laser cutting uses a high-power density laser beam to illuminate the material to be cut, so that various materials are quickly heated to the vaporization temperature and evaporated to form small holes of 0.1MM~0.3MM. As the beam moves relative to the material, the holes continuously form slits with consistent width to complete the cutting of the material. Due to the advantages of laser cutting such as good cutting quality, high cutting efficiency, fast cutting speed, non-contact cutting without cutting stress, good adaptability, and low post-processing cost, laser cutting and laser drilling play an increasingly important role in industrial production and processing. With the development of modern society, higher requirements are placed on the precision and efficiency of material processing.

[0003] In this context, the manual programming of laser cutting and the existing offline programming require too long manual debugging time and too low efficiency to meet the requirements of modern high efficiency. The demand for laser cutting automation has also increased.

[0004] A set of cutting tools is installed on the laser cutting equipment platform to position the product to be cut. For relatively simple products, manual programming on the equipment controller is sufficient to meet customer requirements. When processing complex products, manual programming is time-consuming and laborious and far from meeting product requirements; at this time, software intervention is required to program the product; the programmed product shape and feature cutting path need to be manually debugged on the equipment, and the single-point coordinates of each feature and shape on the product need to be found inside the equipment and saved and recorded.

[0005] The existing offline software programs do not use the actual cutting tool as the program origin, and they cannot identify the exact coordinates of the cutting tool in the equipment. Therefore, it is impossible to find the exact coordinates of the product, and it is necessary to manually find the coordinate points of each feature. A set of slightly complex product program coordinate points has nearly 700 to 800 points. These coordinate points need to be debugged one by one on the laser cutting equipment. The debugging cycle is too long. Usually, the manual debugging cycle of a set of complex product programs is 20 to 30 days; at the same time, a large number of products need to be prepared as debugging products. The biggest drawback of the current technology is that the offline program cannot be effectively combined with the laser cutting equipment, which reduces the efficiency and increases the processing cost. Summary of the invention

[0006] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a laser cutting device and a laser cutting debugging method to solve the problems in the prior art that accurate coordinates cannot be found, debugging is cumbersome and has a long cycle.

[0007] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0008] In the first aspect, a laser cutting device includes: a program path module, including a theoretical coordinate value of at least one cutting feature point; a main control module, connected to the cutting head control, connected to the infrared receiver, and used to control the cutting action of the cutting head; a probe, installed on the side wall of the cutting head, provided with an infrared transmitter for intermittently emitting infrared signals, the infrared transmitter is infraredly connected to the infrared receiver, before the cutting head moves, the main control module controls the cutting head and then controls the probe to try to touch the feature point from a position close to the feature point, and disconnects the infrared transmitter from emitting infrared signals when touching the feature point; a coordinate measurement module, connected to the main control module, used to obtain the actual coordinate value of the cutting head feature point in the cutting device, and when the main control module does not receive the infrared signal, records the actual coordinate value of the current cutting head feature point and replaces the theoretical coordinate value; a detection module, connected to the program path module, connected to the main control module, used to verify the deviation between the theoretical coordinate value and the actual coordinate value, and correct the deviation to the theoretical coordinate value of the program path module.

[0009] According to the technical solution provided in the embodiment of the present application, the program path module includes: an input unit, used to input a three-dimensional image of the product and the cutting tool, and establish a coordinate system with the origin of the cutting tool in the three-dimensional image as the coordinate origin; a processing unit, connected to the input unit, and used to form a cutting program path for the product with the established coordinate system and the shape of the product; a conversion unit, connected to the processing unit, and used to convert the program path into a code recognizable by the main control module.

[0010] According to the technical solution provided in the embodiment of the present application, the coordinate measurement module includes: a probe calibration unit, which is used to calibrate the length and eccentricity of the probe; a trigger correction unit, which is connected to the probe calibration unit, and is used to determine whether the feature point is touched during the process in which the main control module controls the cutting head and then controls the probe to touch the theoretical feature point. If touched, the main control module is informed, and the main control module records the actual coordinate value of the feature point.

[0011] According to the technical solution provided in the embodiment of the present application, the probe includes: a connecting mechanism, one end of which is fixedly connected to the side wall of the cutting head; a swivel mechanism, one end of which is rotatably connected to the other end of the connecting mechanism; a probe body, which is connected to the other end of the swivel mechanism and is arranged parallel to the cutting head, with a shell covering the outside and a mechanical device arranged inside, an infrared transmitter is located on the mechanical device, a probe is connected to the bottom of the mechanical device, and the other end of the probe is a ruby ​​head.

[0012] According to the technical solution provided in the embodiment of the present application, it also includes a folding unit, which is located at the connection between the connecting mechanism and the rotating mechanism. The folding unit is connected to the main control module. When the main control module records the coordinate values ​​of the feature points touched by the probe, the folding unit is controlled to fold the probe.

[0013] According to the technical solution provided in the embodiment of the present application, the mechanical device includes: a mechanical trigger device, one end of which is connected to the top of the probe; a fixing member, which is mounted on the end of the mechanical trigger device relatively far away from the probe, and is used to fix the circuit board, the shading plate and the mirror device; the circuit board is located on the side of the fixing member relatively far away from the probe, and is provided with an infrared emitter and a force-sensitive element; the shading plate is located on the side of the fixing member relatively close to the probe; the mirror device is also mounted on the end of the mechanical trigger device relatively far away from the probe, and is located on the inner side of the fixing member, and is used to reflect the infrared light of the infrared emitter.

[0014] According to the technical solution provided in the embodiment of the present application, an LED lamp is connected to the bottom of the circuit board, an end of the LED lamp is located between the fixing member and the mirror device, and a shell corresponding to the end of the LED lamp is made of a transparent material.

[0015] In a second aspect, a laser cutting debugging method is implemented using the laser cutting device described above, comprising the following steps:

[0016] Step S1, preset a laser cutting program path, obtain at least one feature point theoretical coordinate value and a theoretical tooling origin coordinate value;

[0017] Step S2, the probe attempts to touch the tooling origin from a position close to the tooling origin, interrupts the infrared connection after touching it, and records the actual coordinate value of the feature point or the tooling origin;

[0018] Step S3, the actual coordinate values ​​of the tooling origin and the feature point are substituted into the cutting program path, and the cutting head cuts the workpiece into products according to the cutting program path with the actual coordinate values ​​substituted;

[0019] Step S4, after the cutting is completed, the deviation between the actual coordinate value of the product feature and the set theoretical coordinate value is detected, and the deviation value is added to the cutting program path.

[0020] According to the technical solution provided in the embodiment of the present application, before the probe attempts to touch the tooling origin, the method further includes:

[0021] Get the mechanical origin coordinate value of the cutting head;

[0022] Calibrate the length and eccentricity of the infrared trigger probe, and then obtain the actual coordinate value of the infrared trigger probe;

[0023] Define the safety plane.

[0024] According to the technical solution provided in the embodiment of the present application, before the detection module detects, the main control module has completed the following tasks:

[0025] (1) Obtain the actual tooling origin coordinates;

[0026] (2) Obtain the coordinates of the safety plane;

[0027] (3) The actual work origin coordinates are the same as the theoretical tooling origin coordinates;

[0028] (4) Cut the product according to the cutting program path.

[0029] This application has the following beneficial effects:

[0030] Since the laser cutting equipment described in this application is equipped with an infrared trigger probe, and the program path module presets the product cutting program path, then the infrared trigger probe is used to try to touch the actual tooling origin position from a position close to the theoretical tooling origin. After touching, the infrared transmitter stops emitting infrared signals, and the main control module does not receive the infrared signal, notifying the coordinate measurement module to record the actual tooling origin coordinate value and send it to the main control module. The main control module sends the actual tooling origin coordinate value to the cutting program path module. After the cutting program path module replaces the theoretical tooling origin coordinate value with the actual tooling origin coordinate value, the main control module controls the cutting head to start cutting with the actual tooling origin coordinate value as the tooling origin. This makes positioning more precise and cutting more accurate; the actual cutting starting position is the same as the actual position preset by the cutting program path, that is, the theoretical tooling origin and the actual tooling origin coordinates are the same, which further ensures the accuracy of cutting. At the same time, the program path module presets the cutting program path and the detection coordinates of the later detection points and sends them to the detection module. On the one hand, it enables the cutting head to cut according to the preset program path, without the need to try cutting a large number of products on the equipment to find the coordinates of the products on the laser cutting platform. While saving costs, it can accurately locate and ensure product accuracy; on the other hand, it makes product detection and debugging faster and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 This is a structural block diagram of the laser cutting equipment described in this application;

[0033] Figure 2 It is a structural block diagram of the program path module described above;

[0034] Figure 3 This is a structural block diagram of the coordinate determination module described in this application;

[0035] Figure 4This is a flow chart of the automatic cutting debugging method described in this application;

[0036] Figure 5 This is a schematic diagram of the connection structure between the cutting head and the infrared trigger probe described in this application;

[0037] Figure 6 This is a schematic diagram of the infrared trigger probe and its internal structure described in this application;

[0038] Figure 7 This is a schematic diagram of the cross-sectional structure of the infrared trigger probe described in this application;

[0039] Figure 8 This is a schematic diagram of the internal structure of the infrared trigger probe described in this application without the transparent part of the shell;

[0040] Fig. 9 This is a schematic diagram of the internal structure of the infrared trigger probe described in this application without the shell.

[0041] Description of reference numerals:

[0042] 1. Cutting head; 2. Probe; 3. Infrared receiver;

[0043] 21. Connecting mechanism; 22. Rotating mechanism; 23. Probe body; 24. Rotating pin;

[0044] 231. housing; 232. mechanical device; 233. power supply device; 234. probe;

[0045] 2321, circuit board; 2322, shading plate; 2323, fixing part; 2324, mirror device; 2325, mechanical trigger device;

[0046] 2331, battery compartment;

[0047] 2341. Ruby Head. DETAILED DESCRIPTION

[0048] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant application, rather than to limit the application. It is also necessary to explain that, for ease of description, only the parts related to the application are shown in the accompanying drawings.

[0049] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] A laser cutting device, comprising:

[0051] A program path module, including a theoretical coordinate value of at least one cutting feature point;

[0052] The main control module is connected to the cutting head 1 and the infrared receiver 3 to control the cutting action of the cutting head;

[0053] The probe 2 is installed on the side wall of the cutting head, and is provided with an infrared transmitter for intermittently transmitting infrared signals. The infrared transmitter is infraredly connected to the infrared receiver 3. Before the cutting head moves, the main control module controls the cutting head and then controls the probe to try to touch the feature point from a position close to the feature point. When the feature point is touched, the infrared transmitter is disconnected to transmit infrared signals;

[0054] A coordinate measurement module, connected to the main control module, is used to obtain the actual coordinate value of the cutting head feature point in the cutting device, and when the main control module does not receive the infrared signal, the actual coordinate value of the current cutting head feature point is recorded and replaced with the theoretical coordinate value;

[0055] The detection module is connected to the program path module and the main control module, and is used to verify the deviation between the theoretical coordinate value and the actual coordinate value, and correct the deviation to the theoretical coordinate value of the program path module.

[0056] Please refer to Figure 1 The program path module includes cutting program paths for several products, and the cutting program paths are multiple sets of theoretical coordinate values ​​of cutting feature points arranged in cutting sequence. These theoretical coordinate values ​​include the coordinate values ​​of the theoretical tooling origin and the theoretical coordinate values ​​of the detection points that need to be detected later.

[0057] Here, the tooling origin refers to the origin of the cutting tooling and the product on the laser cutting equipment. The cutting tooling is used to fix the workpiece or product to be processed. The mechanical origin of each laser cutting equipment is fixed, and the cutting head will return to the mechanical origin after cutting.

[0058] The main control module can cut the workpiece into the required product according to the cutting program path. It is connected with the coordinate measurement module to obtain the coordinate value obtained by the coordinate measurement module; it is connected with the detection module to detect the actual coordinate value of the detection point according to the detection point detected by the detection module, and the detection module corrects the deviation to the program path module.

[0059] It can be understood here that the infrared trigger probe is connected to the cutting head, and when the main control module controls the action of the cutting head, the infrared trigger probe is fixed on the cutting head and moves together with the cutting head.

[0060] Since the laser cutting equipment described in the present application is equipped with an infrared trigger probe and the program path module presets a product cutting program path, the infrared trigger probe is used to try to touch the actual tooling origin position from a position close to the theoretical tooling origin. After touching it, the infrared transmitter stops emitting infrared signals, and the main control module does not receive the infrared signal. The coordinate measurement module is notified to record the actual tooling origin coordinate value and send it to the main control module. The main control module sends the actual tooling origin coordinate value to the cutting program path module. After the cutting program path module replaces the theoretical tooling origin coordinate value with the actual tooling origin coordinate value, the main control module controls the cutting head to start cutting with the actual tooling origin coordinate value as the tooling origin.

[0061] This makes positioning more precise and cutting more accurate; the actual cutting starting position is the same as the actual position preset in the cutting program path, that is, the theoretical tooling origin and the actual tooling origin coordinates are the same, further ensuring the accuracy of cutting. At the same time, the program path module presets the cutting program path and the later detection point detection coordinates and sends them to the detection module. On the one hand, the cutting head cuts according to the preset program path, without the need to try cutting a large number of products on the equipment to find the coordinates of the products in the laser cutting platform, saving costs while accurately positioning and ensuring product accuracy; on the other hand, it makes product detection and debugging faster and more convenient.

[0062] Specifically, the convenience of product debugging is reflected in the following: after the first product is cut, the infrared trigger probe is used to detect the hole position or product features and appearance of the product again, and each deviation value is compensated according to the detection results, and the deviation value is automatically included in the program path module to complete the entire program debugging process. The debugging cycle is shortened from the original 20-30 days to 1-2 days, which greatly reduces the waiting time for production, improves production efficiency, and saves time costs; compared with the existing manual debugging, the debugging process is simple and convenient, replacing the cumbersome process of manual debugging, and realizing the automated production of laser cutting; while debugging, the disassembly and assembly of the product is avoided, the error caused by the secondary clamping is reduced, and the accuracy of the product is improved; the original debugging scheme requires frequent switching of the equipment. Each time the laser cutting equipment is switched on and off, the laser in the equipment needs to be charged The gas valve inputs a large amount of working gas such as nitrogen, helium, and carbon dioxide. The frequent switching of equipment during debugging consumes a lot of gas. At the same time, gas is also consumed when cutting the debugged products. The present application does not require frequent switching on and off, nor does it require multiple debugging products. Therefore, it effectively saves the consumption of rare gases and reduces processing costs. The existing manual debugging products have a large deviation between the thread formula and the coordinates of the actual product, resulting in the risk of muzzle collision during equipment operation. The muzzle collision will cause great damage to the equipment. The equipment described in the present application uses an infrared trigger probe to first detect the product position, solve the problem of muzzle collision, reduce the loss of laser cutting equipment, and ensure equipment safety. In addition, the infrared trigger probe is small in size and light in weight, does not take up too much space, and is very convenient to install on the cutting head without affecting the function and normal operation of the equipment.

[0063] Furthermore, the program path module includes:

[0064] An input unit, used to input a three-dimensional image of a product and a cutting tool, and to establish a coordinate system with the origin of the cutting tool in the three-dimensional image as the origin of the coordinates;

[0065] A processing unit connected to the input unit, used to form a cutting program path of the product with the established coordinate system and the shape of the product;

[0066] The conversion unit is connected to the processing unit and is used to convert the program path into a code recognizable by the main control module.

[0067] Please refer to Figure 2 As shown, the input unit is used to input three-dimensional 3D images of multiple cutting tools and products, and establish a coordinate system in the reference hole of each three-dimensional 3D tooling drawing file. At this time, the theoretical tooling origin coordinate value of each product is determined.

[0068] The processing unit is connected to the input unit, and a program path that conforms to the product appearance characteristics is made according to the established coordinate system. The program path is a plurality of cutting feature point coordinate values ​​arranged in time sequence, and these feature point coordinate values ​​include the theoretical tooling origin coordinate value and the detection point coordinate value detected by the later detection module. It should be noted here that the shape and characteristics of the product after cutting, that is, the final product form, are found, and the detection point coordinates for later detection are determined. At the same time, process parameters such as cutting speed and cutting efficiency can be determined.

[0069] The conversion unit is connected to the processing unit and is used to convert the program path into a recognizable code, that is, a language that can be recognized by the main control module, so that the main control module controls the cutting head to cut the product according to the program path.

[0070] Furthermore, the coordinate measurement module includes:

[0071] Probe calibration unit, used to calibrate the length and eccentricity of the probe;

[0072] The trigger correction unit is connected to the probe calibration unit and is used to determine whether the feature point is touched during the process in which the main control module controls the cutting head and then controls the probe to touch the theoretical feature point. If touched, the main control module is informed, and the main control module records the actual coordinate value of the feature point.

[0073] Please refer to Figure 3 As shown, the probe calibration unit calibrates the length and eccentricity of the infrared trigger probe and determines the offset of the infrared trigger probe. In this way, the main control module obtains the coordinate value of the cutting head and then adds the offset to obtain the position of the probe in the device. For example, the cutting head is initially located at the mechanical origin of the device, and the mechanical origin is the initial position of the cutting head. The offset is added to the coordinate measurement unit to obtain the coordinates of the cutting head to obtain the coordinates of the probe.

[0074] The macro program module includes a probe calibration unit, a correction unit, and a detection unit. In the absence of a safety plane, after the macro program module is run, the mechanical origin coordinates of the cutting head are sensed through the probe controller, and the mechanical origin coordinates are the initial position of the cutting head. The probe calibration unit is called to first calibrate the length and eccentricity of the infrared trigger probe, and the offset is added to the mechanical origin coordinates of the cutting head. The actual position of the probe is adjusted according to the probe offset, and finally the specific position coordinates of the infrared trigger probe in the laser cutting equipment can be determined.

[0075] Furthermore, the probe 2 comprises:

[0076] A connecting mechanism 21, one end of which is fixedly connected to the side wall of the cutting head 1;

[0077] A swivel mechanism 22, one end of which is rotatably connected to the other end of the connecting mechanism 21;

[0078] The probe body 23 is connected to the other end of the rotating mechanism 22 and is arranged parallel to the cutting head 1. A shell 231 is provided on the outside and a mechanical device 232 is provided inside. The infrared transmitter is located on the mechanical device 232. A probe 234 is connected to the top of the bottom of the mechanical device 232. The other end of the probe 234 is a ruby ​​head 2341.

[0079] Specifically, Figure 5 and Figure 6 As shown, the probe body 23 is rotatably fixed on the cutting head 1 through the connecting mechanism 21 and the rotating mechanism 22. When working, the probe body 23 is arranged parallel to the cutting head 1, and when rotating and folding, the probe body 23 is arranged perpendicular to the cutting head.

[0080] Specifically, Figure 6 As shown, the housing 231 is used to cover and fix the mechanical device 232. The mechanical device 232 is connected to the probe 234 and senses the contact between the probe 234 and the product or workpiece to be processed. The probe is a stainless steel probe, and the end that contacts the product or entity is a ruby ​​head 2341, as shown in FIG. Figure 7 The ruby ​​head 2341 touches the workpiece of the product to be processed, so that the end of the protective probe 234 is not easily damaged.

[0081] The specific working process is that the infrared transmitter is located on the mechanical device of the probe body 23. Manually move the cutting head 1 and the infrared trigger probe 2 together to a position close to the tooling origin, record the coordinates of this point, trigger the calibration unit to execute the calibration program of the control probe, and the free end of the probe 234 moves to find the tooling origin. When the probe 234 touches the workpiece to be processed or the cutting tool, the mechanical device 232 senses the touch, disconnects the infrared transmitter from the infrared receiver 3, and the main control module controls the probe to stop moving. The coordinate measurement module records the coordinates at this time to the main control module. After the main control module records and sends it to the program path module, the main control module restores the infrared transmitter to continue to generate infrared signals, and the probe resumes work. At this time, the starting coordinates of the cutting program path are the actual tooling origin coordinates.

[0082] After that, the main control module controls the cutting head to start cutting the product based on the tooling origin found by the probe. After the product has cut the hole program, the cutting stops. The detection module measures the coordinate value of the detection point according to the preset detection point and compares it with the theoretical value. The probe moves to 100mm above the product feature and then slowly descends. After the probe touches the product, the infrared connection is interrupted. The coordinate measurement module sends the actual coordinate value to the main control module. The detection module receives the actual coordinate value and compares the deviation between the theoretical coordinate value and the actual coordinate value of the detection point, and automatically corrects this deviation to the cutting program path of the program path module.

[0083] Furthermore, it also includes a folding unit, which is located at the connection between the connecting mechanism 21 and the rotating mechanism 22. The folding unit is connected to the main control module. When the main control module records the coordinate values ​​of the feature points touched by the probe, the folding unit is controlled to fold the probe.

[0084] Please refer to Figure 1 and Figure 5 As shown. The folding unit includes a rotating pin 24 and a control motor, and the control motor is connected to the main control module. A rotating pin 24 is provided at the connection between the swivel mechanism 22 and the connecting mechanism 21, and the rotating pin 24 passes through the side walls of the swivel mechanism 22 and the connecting mechanism 21. The swivel mechanism 22 is rotatably connected to the connecting mechanism 21 through the rotating pin 24. The exposed end of the rotating pin 24 is connected to a control motor, and the control motor controls the rotation of the rotating pin 24 under the control of the main control module, so that the rotating pin 24 rotates, and then the swivel mechanism 22 can be driven to rotate. When the probe 234 of the probe 1 touches the feature point with a product, the main control module records the actual coordinate value and controls the motor to drive the rotating pin 24 to rotate, and the probe body 23 is retracted to a direction parallel to the connecting mechanism 21 and perpendicular to the cutting head 1, protecting the probe from damage while not affecting the work of the cutting head. At this time, the rotatable connection between the swivel mechanism 22 and the connecting mechanism 21 facilitates the swivel mechanism 22 to drive the probe body 23 and the probe 234 to rotate to the straight line where the connecting mechanism 21 is located after finding the tooling origin, without affecting the work of the cutting head 1. After that, the main control module controls the cutting head 1 to start cutting the product according to the cutting program path of the program path module based on the actual working origin determined by the probe 2.

[0085] Furthermore, the mechanical device 232 includes:

[0086] A mechanical trigger device 2325, one end of which is in contact with the probe 234;

[0087] A fixing member 2323 is sleeved on an end of the mechanical trigger device 2325 relatively far from the probe 234 and is used to fix the circuit board 2321, the light shielding plate 2322 and the mirror device 2324;

[0088] The circuit board 2321 is located on a side of the fixing member 2323 relatively far from the probe 234, and is provided with an infrared emitter and a force-sensitive element;

[0089] The light shielding plate 2322 is located on a side of the fixing member 2323 relatively close to the probe 234;

[0090] The mirror device 2324 is also mounted on an end of the mechanical trigger device 2325 relatively far from the probe 234 and is located inside the fixing member 2323 for reflecting the infrared light of the infrared transmitter.

[0091] Specifically, after the probe 234 touches the product, the force-sensitive element senses the change in force and converts the signal into an electrical signal and sends it to the circuit board 2321. The circuit board 2321 interrupts the infrared transmitter from transmitting the infrared signal. The main control module does not receive the infrared signal. The main control module controls the cutting head to stop moving and remain still and stores the current coordinates. After the recording is completed, the main control module controls the probe controller to restore the infrared transmitter of the circuit board to continue working.

[0092] Among them, Figure 7-9 As shown, a sealing ring is sleeved at the connection between the circuit board 2321 and the fixing member 2323, and a sealing ring is also provided at the connection between the light shielding plate 2322 and the fixing member 2323, so that the connection is tighter.

[0093] The fixing member 2323 has a circular hole in the center. Figure 6 As shown, the central circular hole of the fixing member 2323 facilitates the end of the mechanical trigger device 2325 to pass through the circular hole and connect with the force sensitive element. A circuit board 2321 and a light shielding plate 2322 are respectively provided on both sides of the circular hole. The light shielding plate 2322 is located on a side relatively close to the probe 234, and the circuit board 2321 is located on a side relatively far from the probe 234.

[0094] The light shielding plate 2322 is annular and has an opening. Figure 6 As shown, the annular light shielding plate 2322 is conveniently mounted on the outer wall of the mechanical trigger device 2325. The light shielding plate 2322 is located on a side relatively close to the probe 234 and has an opening design on it for the infrared light emitted by the infrared transmitter to pass through, thereby preventing infrared signal reception errors.

[0095] The mirror device 2324 is cylindrical, and its end diameter close to the probe 234 gradually increases in size in the direction close to the probe. Figure 7-8 As shown, the mirror device 2324 is used to reflect light to the receiver to enhance the received signal.

[0096] The mechanical trigger device 2325 is provided with a spring inside. Fig. 9 As shown, the spring transmits the force applied to the probe and at the same time the spring contacts the probe to protect the probe from being damaged.

[0097] Specifically, please refer to Figure 6 and Figure 7As shown, the probe body 23 is also provided with a power supply device 233, and the power supply device 233 includes a battery compartment 2331 for containing batteries, and the battery compartment 2331 is located between the circuit board 2321 and the rotating mechanism 22. Specifically, the power supply device 233 is used to supply power to the circuit board 2321. The battery compartment 2331 has a stainless steel shell.

[0098] Furthermore, an LED lamp is connected to the bottom of the circuit board 2321, and an end of the LED lamp is located between the fixing member 2323 and the mirror device 2324. The housing 231 corresponding to the end of the LED lamp is made of transparent material.

[0099] It can be understood that the LED lamp is connected to the circuit board 2321, and its end is located outside the mirror device 2324 after passing through the shading plate 2322. The position of the housing 231 corresponding to the end of the LED lamp is made of transparent material. When the main control module controls the circuit board to interrupt the infrared transmitter to transmit infrared signals, the LED lamp turns on red, and the transparent material part of the housing 231 is convenient for users to observe the red light on, and judge that the infrared connection is in an interrupted state at this time; when the main control module controls the circuit board to resume the infrared transmitter to transmit infrared signals, the LED lamp turns on green, and the transparent material part of the housing 231 is convenient for users to observe the green light on, and judge that the infrared connection has been restored at this time. The transparent material is a protective cover made of natural glass.

[0100] A laser cutting debugging method is implemented using the laser cutting equipment described above, comprising the following steps:

[0101] Step S1, preset a laser cutting program path, obtain at least one feature point theoretical coordinate value and a theoretical tooling origin coordinate value;

[0102] Step S2, the probe attempts to touch the tooling origin from a position close to the tooling origin, interrupts the infrared connection after touching it, and records the actual coordinate value of the feature point or the tooling origin;

[0103] Step S3, the actual coordinate values ​​of the tooling origin and the feature point are substituted into the cutting program path, and the cutting head cuts the workpiece into products according to the cutting program path with the actual coordinate values ​​substituted;

[0104] Step S4, after the cutting is completed, the deviation between the actual coordinate value of the product feature and the set theoretical coordinate value is detected, and the deviation value is added to the cutting program path.

[0105] Please refer to Figure 4 As shown, the program path module is used to establish the laser cutting program path, determine the theoretical tooling origin, and set the theoretical coordinate value of the detection point.

[0106] The laser cutting program module is used to preset and store the laser cutting program path. The establishment of the cutting program path can be completed through offline software or the device's own software.

[0107] After installing the probe on the cutting head, start the equipment. After the equipment is started, the cutting head is located at the mechanical origin. At this time, manually shake the cutting head to a position close to the tooling origin. The coordinate measurement module records the coordinates close to the tooling origin and sends the coordinates to the main control module. The main control module calls the trigger correction unit, which controls the probe to move from a position close to the actual tooling origin to the actual tooling origin coordinates. After touching, the infrared transmitter stops emitting infrared signals. The main control module does not receive the infrared signal and controls the trigger correction unit to stop running. The coordinate measurement module records the coordinates of the cutting head at this time and sends them to the main control module.

[0108] The main control module obtains the coordinate value of the actual tooling origin, substitutes the coordinate value of the actual tooling origin into the theoretical tooling origin of the laser cutting program path, and controls the cutting head to cut the product according to the cutting program path, and the cutting is completed. The detection unit is running, and the main control module controls the cutting head to control the probe to touch the feature point, disconnects the infrared connection after touching it, and records the actual coordinate value of the feature point and the deviation value from the set theoretical coordinate value, and fills the deviation value into the cutting program path.

[0109] Furthermore, before the probe attempts to touch the tooling origin, the following steps are also included:

[0110] Get the mechanical origin coordinate value of the cutting head;

[0111] Calibrate the length and eccentricity of the infrared trigger probe, and then obtain the actual coordinate value of the infrared trigger probe;

[0112] Define the safety plane.

[0113] Specifically, the safety plane coordinates are defined as 100mm above the product. In this way, the actual coordinate value of the tooling origin is obtained, and the coordinate value of the safety plane is also obtained. Therefore, the coordinates of the safety planes of different products are also different. After the safety plane is set, the cutting head first quickly moves to the position of the safety plane each time it moves, and then slowly approaches the tooling origin coordinates or other detection point coordinates; after finding or cutting the product, the cutting head first returns to the safety plane and then returns to the mechanical origin. Because after the equipment is running, the cutting head runs at a relatively fast speed. If there is no safety plane, the cutting head may bump around and damage the probe.

[0114] After the main control module moves the cutting head from the actual tooling origin to the safety plane, the main control module controls the folding unit to fold the probe. Then the product is cut according to the determined program path. After cutting, the cutting head returns to the safety plane first and then to the mechanical origin.

[0115] Furthermore, before the detection module detects, the main control module has completed the following tasks:

[0116] (1) Obtain the actual tooling origin coordinates;

[0117] (2) Obtain the coordinates of the safety plane;

[0118] (3) The actual work origin coordinates are the same as the theoretical tooling origin coordinates;

[0119] (4) Cut the product according to the cutting program path.

[0120] After the detection module completes the detection and automatic correction of each feature point, the cutting head is lifted to a safe plane and the probe is folded to complete the debugging of the entire product. Compared with the existing manual debugging, the debugging cycle is shortened, the product accuracy is improved, and the processing cost is reduced. During the detection process, the infrared trigger probe first detects the product position to solve the problem of hitting the gun muzzle, reduce the loss of laser cutting equipment, and ensure equipment safety.

[0121] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

Claims

1. A laser cutting device, characterized in that: include: a program path module, used to preset a laser cutting program path and obtain a theoretical coordinate value of at least one characteristic point of a preset product, wherein the characteristic point at least includes a tooling origin and a detection point to be detected later; a main control module, connected to a cutting head (1) and connected to an infrared receiver (3), and used to control the cutting action of the cutting head; The probe (2) is mounted on the side wall of the cutting head and is provided with an infrared transmitter for intermittently transmitting infrared signals. The infrared transmitter is infraredly connected to the infrared receiver (3). Before the cutting head moves, the main control module controls the cutting head and then controls the probe to try to touch the tooling origin from a position close to the tooling origin of the workpiece to be processed. When the tooling origin is touched, the infrared transmitter is disconnected from transmitting infrared signals. A coordinate measurement module connected to the main control module, for recording the actual coordinate value of the tooling origin when the main control module controls the probe to try to touch the tooling origin from a position close to the tooling origin and when the infrared connection is interrupted after the touch, that is, when the main control module does not receive the infrared signal; The main control module is used to send the actual coordinate value of the tooling origin to the program path module, and the program path module replaces the theoretical coordinate value of the tooling origin with the actual coordinate value. The main control module controls the cutting head to start cutting with the actual coordinate value of the tooling origin as the tooling origin, and cuts the workpiece to be processed into a product; The detection module is connected to the program path module and the main control module, and is used to detect and record the actual coordinate value of the product detection point, calculate the deviation between the actual coordinate value of the detection point and the theoretical coordinate value, and correct the deviation to the preset laser cutting program path.

2. The laser cutting device according to claim 1, characterized in that: The program path module includes: An input unit, used to input a three-dimensional image of a product and a cutting tool, and to establish a coordinate system with the origin of the cutting tool in the three-dimensional image as the origin of the coordinates; A processing unit connected to the input unit, used to form a cutting program path of the product with the established coordinate system and the shape of the product; The conversion unit is connected to the processing unit and is used to convert the program path into a code recognizable by the main control module.

3. The laser cutting device according to claim 1, characterized in that: The coordinate measurement module comprises: Probe calibration unit, used to calibrate the length and eccentricity of the probe; The trigger correction unit is connected to the probe calibration unit and is used to determine whether the feature point is touched during the process in which the main control module controls the cutting head and then controls the probe to touch the theoretical feature point. If touched, the main control module is informed, and the main control module records the actual coordinate value of the feature point.

4. The laser cutting device according to claim 1, characterized in that: The probe (2) comprises: A connecting mechanism (21), one end of which is fixedly connected to the side wall of the cutting head (1); A swivel mechanism (22), one end of which is rotatably connected to the other end of the connecting mechanism (21); The probe body (23) is connected to the other end of the rotating mechanism (22) and is arranged in parallel with the cutting head (1). The outer cover is provided with a shell (231) and the inner part is provided with a mechanical device (232). The infrared transmitter is located on the mechanical device (232). The bottom of the mechanical device (232) is connected with a probe (234). The other end of the probe (234) is a ruby ​​head (2341).

5. The laser cutting device according to claim 4, characterized in that: It also comprises a folding unit, which is located at the connection between the connecting mechanism (21) and the rotating mechanism (22), and the folding unit is connected to the main control module. When the main control module records the coordinate values ​​of the feature points touched by the probe, the folding unit is controlled to fold the probe.

6. The laser cutting device according to claim 4, characterized in that: The mechanical device (232) comprises: A mechanical trigger device (2325), one end of which is in abutment with the probe (234); A fixing member (2323) is sleeved on an end of the mechanical trigger device (2325) relatively far from the probe (234), and is used to fix the circuit board (2321), the light shielding plate (2322) and the mirror device (2324); A circuit board (2321) is located on a side of the fixing member (2323) relatively far from the probe (234), and is provided with an infrared emitter and a force-sensitive element; A light shielding plate (2322) is located on a side of the fixing member (2323) relatively close to the probe (234); The mirror device (2324) is also mounted on an end of the mechanical trigger device (2325) relatively far from the probe (234) and is located inside the fixing member (2323) for reflecting infrared light from the infrared transmitter.

7. The laser cutting device according to claim 6, characterized in that: An LED lamp is connected to the bottom of the circuit board (2321); an end of the LED lamp is located between the fixing member (2323) and the mirror device (2324); and a housing (231) corresponding to the end of the LED lamp is made of a transparent material.

8. A laser cutting debugging method, characterized in that: The method is implemented by using the laser cutting device according to any one of claims 1 to 7, comprising the following steps: Step S1, preset a laser cutting program path, obtain the theoretical coordinate value of at least one feature point of the preset product, the feature point at least includes the tooling origin and the detection point that needs to be detected later, and the theoretical coordinate value of the feature point at least includes the theoretical coordinate value of the tooling origin and the theoretical coordinate value of the detection point that needs to be detected later; Step S2, the probe attempts to touch the tooling origin from a position close to the tooling origin, interrupts the infrared connection after touching it, and records the actual coordinate value of the tooling origin; Step S3, replacing the theoretical coordinate value of the tooling origin with the actual coordinate value, and the cutting head starts cutting with the actual coordinate value of the tooling origin as the tooling origin, and cuts the workpiece to be processed into a product; Step S4, after the cutting is completed, the actual coordinate value of the product detection point is detected and recorded, the deviation between the actual coordinate value and the theoretical coordinate value of the detection point is calculated, and the deviation is corrected to the preset laser cutting program path.

9. A laser cutting debugging method according to claim 8, characterized in that: Before the probe attempts to touch the tooling origin, it also includes: Get the mechanical origin coordinate value of the cutting head; Calibrate the length and eccentricity of the infrared trigger probe, and then obtain the actual coordinate value of the infrared trigger probe; Define the safety plane.

10. A laser cutting debugging method according to claim 9, characterized in that: Before the detection module is detected, the main control module has completed the following tasks: (1) Obtain the actual coordinate value of the tooling origin; (2) Obtain the coordinates of the safety plane; (3) Cut the product according to the cutting program path; (4) The actual coordinate value of the tooling origin is the same as the theoretical coordinate value.

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