A laser cutting machine for workpiece holes

Abstract

The present invention relates to a laser cutting machine for workpiece holes, comprising a frame and a laser cutting machine head mounted on the frame, a positioning fixture, a rotating table and a camera device mounted on the frame, the positioning fixture is rotatably mounted on the rotating table, the positioning fixture has a first channel, the rotating table has a second channel, the camera device sequentially obtains image data of the lower surface of the workpiece to be cut mounted on the positioning fixture through the second channel and the first channel, a control device outputs a rotation control signal according to the image data, the rotating table controls the positioning fixture to rotate a certain angle according to the rotation angle information to adjust the to-be-cut position of the workpiece to be cut, and the control device is communicatively connected with the camera device, the rotating table and the laser cutting machine head. The present invention improves the processing efficiency and reliability while reducing the software and hardware costs of the machine.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, in particular to a laser cutting machine for cutting workpiece holes. Background Art

[0002] The CCD laser cutting machines in traditional technology all use a CCD camera set just above the workpiece to be cut to capture the image of the front of the workpiece to be cut, and then link the laser cutting head to achieve laser cutting. If necessary, the workpiece to be cut is adjusted by the workbench or the laser cutting head is controlled by a robot to achieve laser cutting at different angles. This type of machine requires a lot of data to be regulated and processed by the control device, so the data processing accuracy of the multi-control system and the mechanical control accuracy are required to be high, so the manufacturing cost is high, and the structure of the machine is relatively complex, it occupies a large space, and the maintenance cost is often high.

[0003] The Chinese utility model patent with the publication number CN201405162Y in the prior art discloses an ultraviolet laser device for cutting a copper substrate for a high-power LED chip, including an ultraviolet laser, an optical imaging system and a processing platform. The output end of the ultraviolet laser is provided with an optical shutter, the output end of the optical shutter is connected to a beam expander, the output end of the beam expander is arranged with a first reflector, the first reflector is connected to a second reflector, the output end of the second reflector is connected to a focusing mirror, and the focusing mirror is directly opposite to the processing platform; the optical imaging system includes a third reflector, a fourth reflector, a first CCD, a second CCD, a first illumination light source, a second illumination light source and a third CCD; the laser emitted by the ultraviolet laser is incident on the optical shutter, the laser passes through the optical shutter and vertically enters the beam expander, the laser after passing through the beam expander is incident on the 45-degree first reflector and the second reflector in turn, the reflected laser is vertically incident on the focusing mirror, and the laser through the focusing mirror is focused on the processing platform. The copper substrate LED chip is adsorbed on the processing platform to achieve one-time cutting of the copper substrate by ultraviolet laser. This prior art relies on using a light-transmitting processing platform as the loading plane for the copper substrate, configuring a third CCD below the bottom of the copper substrate to realize image data of the lower surface of the workpiece, and during the processing, the third CCD observes whether the laser penetrates the copper substrate, and adjusts the cutting depth by changing the cutting speed of the platform or changing the frequency of the laser to improve the accuracy of laser cutting. Although this prior art provides the application of CCD camera to take pictures at the bottom of the workpiece, the main technical problem it solves is to adjust the cutting parameters of the laser accordingly by observing the cutting depth of the laser.

[0004] In summary, manufacturers can design a new laser cutting machine by combining the shortcomings of the above-mentioned traditional technologies and the technical inspirations for different application positions of CCD in the existing technologies. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a laser cutting machine for workpiece holes in view of the deficiencies of the above-mentioned prior art.

[0006] An embodiment of the present invention provides a workpiece hole laser cutting machine, which is used for laser cutting a workpiece to be cut. The workpiece to be cut has a plurality of to-be-cut positions symmetrically about a central axis, and comprises a frame and a laser cutting head mounted on the frame. A positioning fixture, a rotating table and a camera device are mounted on the frame. The positioning fixture is rotatably mounted on the rotating table. The positioning fixture has a first channel, and the rotating table has a second channel. The camera device sequentially obtains image data of the lower surface of the workpiece to be cut mounted on the positioning fixture through the second channel and the first channel. A control device outputs a rotation control signal according to the image data. The rotating table controls the positioning fixture to rotate a certain angle according to the rotation angle information to adjust the to-be-cut position of the workpiece to be cut. The control device is communicatively connected with the camera device, the rotating table and the laser cutting head. The beneficial effects of this embodiment are as follows: by arranging the workpiece between the laser cutting head and the camera device, and then using a rotating table to adjust the position of the workpiece to be cut, the laser cutting of the workpiece to be cut with several central axis symmetrical positions to be cut is realized. The position of the laser cutting head and the position of the camera device of the machine are fixed and do not need to be tracked and adjusted. The control device only needs to be responsible for the cutting frequency, start and stop of the laser cutting head and the image data of the camera device for the laser cutting head and the camera device, and does not need to make additional position adjustments. Compared with traditional technologies and existing technologies, it can greatly save the cost of manufacturing the mechanical structure required for mechanical position adjustment, and simplify the composition structure of the machine, occupying less space and greatly reducing maintenance costs. In addition, the position of the workpiece to be cut is adjusted by rotating the rotating table to switch the position to be cut, which is simple and easy to use, with small processing errors, and improves the efficiency and reliability of processing while reducing the software and hardware costs of the machine.

[0007] In some embodiments, the rotary table includes a bracket fixed on a frame, a mounting seat mounted on the bracket, a turntable mounted on the mounting seat, and a servo motor mounted on the mounting seat, the mounting seat is provided with the above-mentioned second channel, the output end of the servo motor is connected to the turntable by transmission, and the turntable is fixedly assembled with the positioning fixture. The beneficial effects of this embodiment are: the composition structure of the rotary table is simple and easy to use, the turntable is directly rotated by the servo motor to control the rotation of the workpiece to be cut so as to adjust the switching of the position to be cut, and the second channel is configured on the mounting seat, and the second channel can provide an optical path channel to cooperate with the camera device to obtain image data of the workpiece to be cut on the positioning fixture.

[0008] In some embodiments, the rotating workbench is equipped with a lighting device, which is used to sequentially illuminate the lower surface of the workpiece to be cut through the second channel and the first channel. The beneficial effect of this embodiment is: by configuring the lighting device to illuminate the workpiece to be cut through the camera channel composed of the second channel and the first channel, the composition of the camera channel can concentrate the lighting of the lighting device to increase the lighting brightness, and can prevent external interference with the light path, which can improve the lighting effect as a whole and provide an environmental basis for the camera device to obtain clearer image data.

[0009] In some embodiments, the lighting device has an assembly ring, the assembly ring has an assembly platform with an inner diameter smaller than the second channel and the first channel, and the light-emitting body is assembled on the assembly platform. The beneficial effects of this embodiment are: the lighting device has a simple structure and high reliability, and the light-emitting body is assembled on the assembly platform with an inner diameter smaller than the second channel and the first channel, so that the light source of the light-emitting body can fully reach the camera surface.

[0010] In some embodiments, the turntable and the output end are driven by meshing teeth. The beneficial effects of this embodiment are: the turntable and the output end are driven by meshing, and the gears have the advantages of stable transmission, precise transmission ratio, reliable operation, high efficiency, long life, and a wide range of power, speed and size. By determining the number of teeth or angles of the teeth according to the number of positions to be cut, accurate positioning is achieved, thereby simplifying the structure of the machine.

[0011] In some embodiments, the bottom surface of the mounting seat has a bottom slot and a front slot arranged on the outer periphery of the second channel on the front side of the mounting seat, the side wall of the bottom slot communicates with the side wall of the front slot in the mounting seat to form an interference channel, the output end is inserted in the bottom slot, the turntable is assembled in the front slot, and the output end is connected to the turntable through the interference channel. The beneficial effect of this embodiment is: a simple and reliable assembly structure and a structure for realizing transmission connection are provided for the servo motor and the turntable on the mounting seat.

[0012] In some embodiments, the turntable includes a central rotating shaft and a peripheral rotating ring, the central rotating shaft is assembled and fixed on the mounting seat, the peripheral rotating ring is sleeved on the outer periphery of the central rotating shaft, the peripheral rotating ring is connected to the servo motor by transmission, and the positioning fixture is assembled and fixed on the peripheral rotating ring. The beneficial effects of this embodiment are: the assembly structure of the central rotating shaft and the peripheral rotating ring is simple, easy to use, and highly reliable.

[0013] In some embodiments, the peripheral swivel includes an upper swivel and a lower swivel, the upper swivel is mounted on the upper end of the central shaft, the lower swivel is mounted on the lower end of the central shaft, and the upper swivel and the lower swivel are fixedly assembled to limit the central shaft and the relative rotation between the upper swivel and the lower swivel. The beneficial effects of this embodiment are: the structure of the peripheral swivel is simple and the reliability is strong.

[0014] In some embodiments, a detection device is configured to collect the rotation information of the turntable, and the detection device is connected to the control device for communication. The beneficial effect of this embodiment is that the rotation information of the turntable is collected by the detection device and fed back to the control device, which is used for the control device to accurately control the turntable, thereby improving the rotation control function of the rotating worktable.

[0015] In some embodiments, the bracket is vertically mounted on the frame, and the assembly of the mounting base, the servo motor and the turntable is tilted at a certain angle to the horizontal plane and mounted on the bracket. The beneficial effect of this embodiment is that the bracket provides a mounting position tilted to the horizontal plane, so that the camera device, the servo motor and the lighting device have a larger operating space on the bracket, and the disassembly or maintenance on the machine is more convenient.

[0016] The details of one or more embodiments of the invention are set forth in the following drawings and description so that other features, objects, and advantages of the invention are more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 The overall structure of the laser cutting machine of the embodiment of the present invention is Figure 1 .

[0019] Figure 2 The overall structure of the laser cutting machine of the embodiment of the present invention is Figure 2 .

[0020] Figure 3 yes Figure 2 Enlarged structural diagram of part A in the figure.

[0021] Figure 4 It is a three-dimensional diagram of the assembly structure of the rotary workbench and the positioning fixture according to an embodiment of the present invention.

[0022] Figure 5 It is a three-dimensional structural diagram of a rotary workbench according to an embodiment of the present invention.

[0023] Figure 6 It is a cross-sectional structural diagram of a rotary worktable according to an embodiment of the present invention.

[0024] Figure 7 The decomposed structure of the rotary table of the embodiment of the present invention is Figure 1 .

[0025] Figure 8 The decomposed structure of the rotary table of the embodiment of the present invention is Figure 2 .

[0026] Fig. 9 It is a three-dimensional structural diagram of a mounting base according to an embodiment of the present invention.

[0027] Fig.10 It is a structural diagram of a positioning fixture for a workpiece to be cut according to an embodiment of the present invention.

[0028] In the figure, 1, workpiece to be cut; 2, position to be cut; 3, center axis; 4, frame; 5, laser cutting head; 6, positioning fixture; 7, rotating worktable; 8, camera device; 9, first channel; 10, second channel; 11, assembly plane; 12, assembly hole; 13, bracket; 14, mounting seat; 15, turntable; 16, servo motor; 17, output end; 18, assembly plate; 19, left bracket; 20, right bracket; 21, upper mounting part ; 22. Middle mounting part; 23. Output shaft; 24. Rotor; 25. Bottom slot; 26. Front slot; 27. Interference channel; 28. Central rotating shaft; 29. ​​Outer rotating ring; 30. Upper rotating ring; 31. Lower rotating ring; 32. First oil sealing ring; 33. Second oil sealing ring; 34. Inner ring; 35. Annular L position; 36. Outer wall; 37. Lighting device; 38. Assembly ring; 39. Assembly platform; 40. Detection device; 41. Assembly position. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described and illustrated in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed by the present invention, some changes such as design, manufacturing or production based on the technical contents disclosed by the present invention are only conventional technical means, and should not be understood as insufficient contents disclosed by the present invention.

[0030] Reference to "embodiments" in the present invention 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 invention. The appearance of the phrase in various places 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 of ordinary skill in the art that the embodiments described in the present invention may be combined with other embodiments without conflict.

[0031] Unless otherwise defined, the technical terms or scientific terms involved in the present invention shall have the usual meanings understood by persons with ordinary skills in the technical field to which the present invention belongs. The words "one", "a", "a", "the" and the like involved in the present invention do not indicate a quantity limitation and may indicate the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in the present invention are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in the present invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in the present invention refers to greater than or equal to two. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, "A and / or B" may indicate: A exists alone, A and B exist at the same time, and B exists alone. The terms "first", "second", "third" and the like involved in the present invention are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0032] like Figure 1-10 As shown, a laser cutting machine for workpiece holes provided by an embodiment of the present invention is used for laser cutting a workpiece 1 to be cut, wherein the workpiece 1 to be cut has a plurality of positions 2 to be cut symmetrically about a central axis 3. The workpiece 1 to be cut in this embodiment is a hemispherical shell, and the positions 2 to be cut are four button holes on the shell, which are symmetrical about the central axis 3. According to the position characteristics of the positions 2 to be cut in this embodiment, the present invention adopts the central axis 3 as the rotation axis to provide rotation of the shell, thereby adjusting the laser cutting of the button holes in turn.

[0033] Based on the basic conditions of the workpiece 1 to be cut mentioned above, the laser cutting machine of this embodiment includes a frame 4 and a laser cutting head 5 installed on the frame 4. A positioning fixture 6, a rotating worktable 7 and a camera device 8 are installed on the frame 4. The positioning fixture 6 is rotatably installed on the rotating worktable 7. The positioning fixture 6 has a first channel 9, and the rotating worktable 7 has a second channel 10. The camera device 8 obtains image data of the lower surface of the workpiece 1 to be cut installed on the positioning fixture 6 through the second channel 10 and the first channel 9 in sequence. A control device (not shown) outputs a rotation control signal according to the image data. The rotating worktable 7 controls the positioning fixture 6 to rotate a certain angle according to the rotation angle information to adjust the to-be-cut position 2 of the workpiece 1 to be cut. The control device is communicatively connected with the camera device 8, the rotating worktable 7, and the laser cutting head 5. By arranging the workpiece between the laser cutting head 5 and the camera device 8, and then using the rotating table 7 to adjust the position 2 of the workpiece to be cut, the laser cutting of the workpiece 1 to be cut with the position 2 to be cut symmetrically with a plurality of central axes 3 is realized. The position of the laser cutting head 5 and the position of the camera device 8 of the machine are fixed and do not need to be tracked and adjusted. The control device only needs to be responsible for the cutting frequency, start and stop of the laser cutting head 5 and the image data of the camera device 8 for the laser cutting head 5 and the camera device 8, and does not need to make additional position adjustments. Compared with traditional technologies and existing technologies, the cost of manufacturing the mechanical structure required for mechanical position adjustment can be greatly saved, and the composition structure of the machine can be simplified, the space occupied is small, and the maintenance cost is greatly reduced. In addition, the position of the workpiece 1 to be cut is adjusted by rotating the rotating table 7 to switch the position 2 to be cut. It is simple and easy to use, and the processing error is small. While reducing the software and hardware costs of the machine, the efficiency and reliability of processing are improved. Because there is no need to use complex mechanical transmission structures such as manipulators, there is no need for corresponding software system control.

[0034] The frame 4 of this embodiment is used to provide an assembly basis and has an assembly plane 11 on which an array of assembly holes 12 are arranged. The rotating worktable 7 can be fixedly assembled in the assembly holes 12 at corresponding positions according to the assembly position 41 and locked.

[0035] The laser cutting head 5 of this embodiment is used to provide a laser beam for cutting, and is generally composed of a laser generator, a lens group and a nozzle. The laser generator provides a laser beam according to a set laser frequency and emits the laser beam through the lens group and the nozzle. Or other equipment that can produce a controllable laser beam.

[0036] like Fig.10As shown, the positioning fixture 6 of this embodiment is used to load and fix the workpiece 1 to be cut, and is hollow in shape as a whole (the hollow part is the first channel 9 mentioned above), with a top surface parallel to the horizontal plane for flat mounting of the housing and a bottom surface assembled at a fixed tilt angle compared to the horizontal plane. The workpiece 1 to be cut is locked on the top surface of the positioning fixture 6 by fasteners, and the central axis 3 of the position 2 to be cut is kept coaxial with the rotation central axis of the rotating platform.

[0037] like Figure 4-9 As shown, the rotary table 7 of this embodiment is used to control the rotation of the workpiece 1 to be cut to switch the position 2 to be cut, and includes a bracket 13 fixed on the frame 4, a mounting seat 14 mounted on the bracket 13, a turntable 15 mounted on the mounting seat 14, and a servo motor 16 mounted on the mounting seat 14. The mounting seat 14 is provided with the above-mentioned second channel 10, and the output end 17 of the servo motor 16 is transmission-connected with the turntable 15, and the turntable 15 is fixedly assembled with the positioning fixture 6. The composition structure of the rotary table 7 is simple and easy to use. The servo motor 16 directly rotates the turntable 15 to control the rotation of the workpiece 1 to be cut so as to adjust the switching of the position 2 to be cut, and the second channel 10 is configured on the mounting seat 14. The second channel 10 can provide an optical path channel to cooperate with the camera device 8 to obtain image data of the workpiece 1 to be cut on the positioning fixture 6. The servo motor 16 provides precise rotation control output in this embodiment. In this embodiment, the servo motor 16 is vertically mounted on the mounting base 14, and the camera center of the camera device 8 is mounted on the bracket 13 parallel to the axis of the servo motor 16, and the camera center of the camera device 8 is as coaxial as possible with the above-mentioned central axis 3 and the rotation center of the turntable 15.

[0038] The bracket 13 of this embodiment is composed of an assembly plate 18 assembled on the frame 4 and a left bracket 19 and a right bracket 20 relatively and vertically assembled on the assembly plate 18. The top surfaces of the left bracket 19 and the right bracket 20 are respectively provided with upper mounting portions 21 with the same inclination angle, and the middle portions of the left bracket 19 and the right bracket 20 are respectively provided with symmetrical middle mounting portions 22. The upper mounting portion 21 is used to assemble the rotating table 7, and the middle mounting portion 22 is used to assemble the camera device 8. Due to the inclination angle of the upper mounting portion 21, the rotating table 7 is also configured at an inclination angle as a whole after assembly, and the bottom surfaces of the rotating table 7 and the positioning fixture 6 are parallel to each other and assembled in place. Thanks to the upper mounting portion 21 with an inclination angle, the rotating table 7 has sufficient operating space between the left bracket 19 and the right bracket 20, and the operator can disassemble and repair the rotating table 7 and the camera device 8 from the sufficient operating space more conveniently.

[0039] In this embodiment, in order to enable stable and reliable transmission between the turntable 15 and the servo motor 16, the turntable 15 and the output end 17 are driven by meshing teeth. The turntable 15 and the output end 17 are driven by meshing, and the gear has the advantages of stable transmission, precise transmission ratio, reliable operation, high efficiency, long life, large power, speed and size range, etc. The number of teeth or angles of the teeth to be cut is determined according to the number of positions 2 to be cut, so as to achieve accurate positioning, thereby simplifying the structure of the machine. More specifically, the output end 17 includes an output shaft 23 of the servo motor 16 and a rotor 24 assembled on the output shaft 23 and coaxially output, and teeth are arranged at the end of the rotor 24. The rotor 24 is an extension of the output shaft 23, which is used to make up for the thickness of the mounting seat 14 and is connected to the turntable 15 by transmission. The output shaft 23 generally has a fixed size ratio as a standard part, so the rotor 24 is used as a continuation of the output and as the output end 17 of the rotating power of the servo motor 16 for external output.

[0040] like Figure 6-9 As shown, a simple and reliable assembly structure and a structure for realizing transmission connection between the servo motor 16 and the turntable 15 on the mounting seat 14 are provided. The bottom surface of the mounting seat 14 of this embodiment has a bottom slot 25 and a front slot 26 arranged on the outer periphery of the second channel 10 on the front side of the mounting seat 14, an interference channel 27 in which the side wall of the bottom slot 25 and the side wall of the front slot 26 communicate with each other in the mounting seat 14, the output end 17 is inserted in the bottom slot 25, the turntable 15 is assembled in the front slot 26, and the output end 17 is transmission-connected with the turntable 15 through the interference channel 27. The central axes 3 of the bottom slot 25 and the front slot 26 are parallel to each other.

[0041] In this embodiment, the turntable 15 includes a central rotating shaft 28 and a peripheral rotating ring 29. The central rotating shaft 28 is assembled and fixed on the mounting seat 14, the peripheral rotating ring 29 is sleeved on the outer periphery of the central rotating shaft 28, the peripheral rotating ring 29 is transmission-connected to the servo motor 16, and the positioning fixture 6 is assembled and fixed on the peripheral rotating ring 29. The assembly structure of the central rotating shaft 28 and the peripheral rotating ring 29 is simple, easy to use, and highly reliable. More specifically, the above-mentioned peripheral rotating ring 29 includes an upper rotating ring 30 and a lower rotating ring 31. The upper rotating ring 30 is sleeved on the upper end of the central rotating shaft 28, and the lower rotating ring 31 is sleeved on the lower end of the central rotating shaft 28. The upper rotating ring 30 and the lower rotating ring 31 are fixedly assembled to limit the central rotating shaft 28 and the relative rotation between the upper rotating ring 30 and the lower rotating ring 31. The structure of the peripheral rotating ring 29 is simple and highly reliable. After the upper rotating ring 30 and the lower rotating ring 31 are assembled and clamped to form the rotating disk 15, they are then embedded in the front slot 26 and screwed through the mounting seat 14 to lock the central rotating shaft 28 at the bottom surface of the mounting seat 14. Figure 5-8As shown, in order to enhance the rotation performance between the central rotating shaft 28 and the peripheral rotating ring 29 in the rotating disk 15, and between the peripheral rotating ring 29 and the mounting seat 14, a first oil seal ring 32 is arranged between the central rotating shaft 28 and the peripheral rotating ring 29, and a second oil seal ring 33 is arranged between the peripheral rotating ring 29 and the mounting seat 14, so that the rotation of the rotating disk 15 is smoother, more stable and more reliable. The specific position of the first oil seal ring 32 is between the annular L position 35 extending around the top surface of the inner ring 34 of the peripheral rotating ring 29 and the central rotating shaft 28 and the outer side wall 36 of the central rotating shaft 28. The positioning fixture 6 is fixed to the peripheral rotating ring 29, specifically the upper end surface of the upper rotating ring 30, by screws.

[0042] In this embodiment, in order to improve the clarity of the image data, it is necessary to configure a stable light source for the camera device 8, which is a necessary preparation for the CCD system. Therefore, in this embodiment, an illumination device 37 is installed on the rotating table 7, and the illumination device 37 is used to sequentially illuminate the lower surface of the workpiece 1 to be cut through the second channel 10 and the first channel 9. By configuring the illumination device 37 to illuminate the workpiece 1 to be cut through the camera channel composed of the second channel 10 and the first channel 9, the composition of the camera channel can concentrate the illumination of the illumination device 37 to improve the illumination brightness, and can prevent the outside from interfering with the light path. In general, the illumination effect can be improved, and the environmental basis for the camera device 8 to obtain clearer image data can be provided. More specifically, the illumination device 37 of this embodiment has an assembly ring 38, and the assembly ring 38 has an assembly platform 39 with an inner diameter smaller than the second channel 10 and the first channel 9. The assembly platform 39 is equipped with a light emitter. The light emitter in this embodiment is a ring-shaped light emitter, so that shadows are minimized during image acquisition. The lighting device 37 has a simple structure and high reliability. The light-emitting body is assembled on an assembly platform 39 whose inner diameter is smaller than that of the second channel 10 and the first channel 9, so that the light source of the light-emitting body can fully reach the camera surface.

[0043] In this embodiment, a detection device 40 is configured to collect the rotation information of the turntable 15, and the detection device 40 is connected to the control device for communication. The detection device 40 collects the rotation information of the turntable 15 and feeds it back to the control device, so that the control device can accurately control the turntable 15 and improve the rotation control function of the rotating table 7. Specifically, the detection device 40 uses a photoelectric sensor, and a baffle (such as a light sensor) is installed on the outer ring 29 of the turntable 15. Figure 5The figure shows the assembly position 41 of the baffle. When the baffle enters the photoelectric sensor, it can be detected. In the initial state, the assembly position of the baffle and the configuration of the photoelectric sensor are pre-set and are related to the position 2 to be cut. For example, in the present embodiment, there are four button holes on the shell, and the four button holes are distributed at equal angles about the central axis 3, and the interval angle is one-fourth of 360 degrees, that is, 90 degrees. Therefore, the angle between the photoelectric sensor and the baffle about the rotation center of the turntable 15 is also 90 degrees, so that the turntable 15 drives the baffle to rotate 90 degrees and then reaches the photoelectric sensor and is detected, and the detection signal is fed back to the control device. The control device determines that the switching position 2 to be cut is in place according to the detection signal, and the cutting operation can be continued, thereby realizing automatic operation linkage.

[0044] The working principle of the embodiment of the present invention is as follows: first, the workpiece 1 to be cut is manually fixed on the positioning fixture 6, the machine is started, the lighting device 37 is started to illuminate the lower surface of the workpiece 1 to be cut, the camera device 8 is started to obtain the image data of the lower surface of the workpiece 1 to be cut and fed back to the control device, the control device confirms whether the to-be-cut area of ​​the workpiece 1 to be cut is located at a preset spatial position according to the image data, after confirmation, the control device controls the laser cutting head 5 to start emitting laser, and the laser cuts the workpiece 1 to be cut. After the cutting of a single to-be-cut position 2 is completed, the control device controls the laser cutting head 5 to be closed, and the control device outputs a rotation control signal, and the servo motor 16 drives the rotor 24 to rotate according to the rotation control signal. When the rotor 24 rotates, it synchronously drives the turntable 15 to rotate, and the rotation of the turntable 15 synchronously drives the positioning fixture 6 to rotate, so as to realize that the hole position that has been cut is sent out of the cutting station (the landing point of the laser on the surface of the workpiece 1 to be cut is the cutting station), and the to-be-cut position 2 enters the cutting station for cutting. After it is in place, the control device controls the laser cutting head 5 to start, and this is repeated to realize automated laser cutting operations.

[0045] Those skilled in the art should understand that the technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A laser cutting machine for workpiece holes, characterized in that: Used for laser cutting a workpiece (1) to be cut, the workpiece (1) to be cut having a plurality of positions (2) to be cut symmetrically about a central axis (3), comprising a frame (4) and a laser cutting head (5) mounted above the frame (4), a positioning fixture (6), a rotating table (7) and a camera device (8) mounted on the frame (4), the positioning fixture (6) being rotatably mounted on the rotating table (7), the positioning fixture (6) having a first channel (9), and the rotating table (7) having a second channel (10 ), the camera device (8) sequentially acquires image data of the lower surface of the workpiece (1) to be cut mounted on the positioning fixture (6) through the second channel (10) and the first channel (9), a control device outputs a rotation control signal according to the image data, the rotary table (7) controls the positioning fixture (6) to rotate a certain angle according to the rotation angle information to adjust the cutting position (2) of the workpiece (1) to be cut, and the control device is in communication connection with the camera device (8), the rotary table (7), and the laser cutting machine head (5); The rotary workbench (7) comprises a bracket (13) fixed on the frame (4), a mounting seat (14) mounted on the bracket (13), a turntable (15) mounted on the mounting seat (14), and a servo motor (16) mounted on the mounting seat (14); the mounting seat (14) is provided with the above-mentioned second channel (10); an output end (17) of the servo motor (16) is transmission-connected to the turntable (15); and the turntable (15) is fixedly assembled with the positioning fixture (6); The bottom surface of the mounting seat (14) comprises a bottom slot hole (25) and a front slot hole (26) arranged on the front periphery of the mounting seat (14) and in correspondence with the second channel (10); the side wall of the bottom slot hole (25) and the side wall of the front slot hole (26) communicate with each other in an interference channel (27) in the mounting seat (14); the output end (17) is inserted into the bottom slot hole (25); the rotating disk (15) is assembled in the front slot hole (26); and the output end (17) is transmission-connected to the rotating disk (15) through the interference channel (27); The turntable (15) comprises a central rotating shaft (28) and a peripheral rotating ring (29), wherein the central rotating shaft (28) is assembled and fixed on the mounting seat (14), the peripheral rotating ring (29) is sleeved on the outer periphery of the central rotating shaft (28), the peripheral rotating ring (29) is transmission-connected to the servo motor (16), and the positioning fixture (6) is assembled and fixed on the peripheral rotating ring (29); The peripheral rotating ring (29) comprises an upper rotating ring (30) and a lower rotating ring (31), wherein the upper rotating ring (30) is sleeved on the upper end of the central rotating shaft (28), and the lower rotating ring (31) is sleeved on the lower end of the central rotating shaft (28). The upper rotating ring (30) and the lower rotating ring (31) are fixedly assembled so as to limit the central rotating shaft (28) between the upper rotating ring (30) and the lower rotating ring (31), and the central rotating shaft (28) rotates relative to the upper rotating ring (30) and the lower rotating ring (31).

2. A laser cutting machine for workpiece holes according to claim 1, characterized in that: The rotating disk (15) and the output end (17) are driven by meshing teeth provided on each of them.

3. A laser cutting machine for workpiece holes according to claim 2, characterized in that: The bracket (13) is vertically mounted on the frame (4), and the assembly of the mounting seat (14), the servo motor (16) and the turntable (15) is mounted on the bracket (13) at a certain angle to the horizontal plane.

4. The laser cutting machine for workpiece holes according to claim 1, characterized in that: A detection device (40) is provided for collecting rotation information of the turntable (15), and the detection device (40) is communicatively connected with the control device.

5. The laser cutting machine for workpiece holes according to claim 1, characterized in that: The rotating worktable (7) is equipped with a lighting device (37), and the lighting device (37) is used to sequentially photograph and illuminate the lower surface of the workpiece (1) to be cut through the second channel (10) and the first channel (9).

6. A laser cutting machine for workpiece holes according to claim 5, characterized in that: The lighting device (37) has an assembly ring (38), the assembly ring (38) has an assembly platform (39) having an inner diameter smaller than the second channel (10) and the first channel (9), and the assembly platform (39) is equipped with a light emitter.

Images