A device and method for detecting the overall air tightness of a high-power laser cutting head

Abstract

The present invention discloses a device and method for overall air tightness detection of a high-power laser cutting head, comprising a stand, wherein the top of the stand is driven by an electric cylinder to move up and down above the inner side of the stand, a suction cylinder is arranged at the lower inner side of the stand, the suction cylinder and the booster cylinder are both connected to an external detection component through an air pipe, a tray assembly is slidably mounted on the stand near the relative plane position of the suction cylinder and the booster cylinder, the tray assembly comprises a sliding support ring and a driving ring plate, the driving ring plate is fixed on the top of the sliding support ring; four groups of sealing rubber plates, the four groups of sealing rubber plates are arranged in an annular array on the opposite sides of the suction cylinder and the booster cylinder, the sealing rubber plates are moved on the inner side of the tray assembly through a four-way shrinking mechanism to contact and fit the surface of the laser head to be detected; the present invention can effectively realize the overall air tightness detection operation of the laser cutting head, and the detection position changes quickly, effectively reducing the time required for detection.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to a device and method for detecting the overall air tightness of a high-power laser cutting head. Background Art

[0002] Air tightness testing is a type of sealing testing process for high-precision products. It can effectively measure the actual sealing effect of the workpiece. Its fundamental principle is to use the supply of air pressure and cooperate with gas or air pressure detection devices to test the workpiece. At present, air tightness testing of laser cutting heads is particularly important. The laser cutting head is composed of multiple rectangular assemblies with mirrors placed inside. If there are gaps between the assemblies, air will enter the mirror position and damage the mirror, affecting the actual laser processing. Therefore, in the production and manufacturing of laser cutting heads and subsequent maintenance, air tightness testing is one of the indispensable testing items;

[0003] Most laser cutting heads do not have air holes specifically used for air tightness testing on their surfaces. Therefore, traditional air tightness testing devices for laser cutting heads basically perform testing operations on two assemblies, which requires the laser cutting head to be disassembled in advance during the air tightness testing process. Multiple disassembly and assembly will affect the assembly sealing between the assemblies, making it more likely to cause air leaks or gaps during subsequent use. In addition, due to the complex appearance of the laser cutting head, the current testing device is unable to perform overall testing operations on the laser cutting head.

[0004] Therefore, how to provide a device and method for detecting the overall air tightness of a high-power laser cutting head is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] One object of the present invention is to propose a device and method for overall air tightness detection of a high-power laser cutting head. The present invention can effectively realize the overall air tightness detection operation of the laser cutting head, and the detection position changes quickly, effectively reducing the time required for detection.

[0006] According to an embodiment of the present invention, a device for overall air tightness detection of a high-power laser cutting head comprises a stand, wherein the top of the stand drives a booster cylinder to move up and down above the inner side of the stand through an electric cylinder, a suction cylinder is arranged below the inner side of the stand, and both the suction cylinder and the booster cylinder are connected to an external detection component through an air pipe, and a tray assembly is slidably mounted on the stand near the relative plane position of the suction cylinder and the booster cylinder, and the tray assembly comprises a sliding support ring and a driving ring plate, and the driving ring plate is fixed on the top of the sliding support ring;

[0007] Four groups of sealing rubber plates, wherein the four groups of sealing rubber plates are arranged in an annular array on opposite sides of the suction cylinder and the boost cylinder, and the sealing rubber plates are moved on the inner side of the tray assembly through a four-way shrinking mechanism to contact and fit the surface of the laser head to be detected;

[0008] The laser head to be detected moves up and down in the suction cylinder through a transposition mechanism, and the suction cylinder is movably connected with the stand through the transposition mechanism.

[0009] Furthermore, the four-way shrinking mechanism includes a loading frame, a transmission assembly and two sets of electric motors, the sealing rubber plate is fixed on one side of the loading frame, a slider is provided in the loading frame for sliding through a sliding groove, the slider is elastically connected to the inner wall of the loading frame through a pressure spring, the outer position of the slider is fixedly connected to a rib groove plate, the rib groove plate is meshed with the transmission assembly for transmission, and the rib groove plate is slidably connected to the sliding support ring.

[0010] Furthermore, the angle formed by the vector directions of two adjacent groups of sealing rubber sheets is ninety degrees, and two adjacent edges of a single group of sealing rubber sheets are respectively attached to the two groups of sealing rubber sheets.

[0011] Furthermore, the transmission assembly includes two groups of pairs of teeth and transmission teeth, the two groups of pairs of teeth are meshed with each other, the transmission teeth are fixed on the dorsal side of the single group of pairs of teeth, and the front sides of the two groups of pairs of teeth are respectively fixed with rib teeth, and the two sides of the rib groove plate are respectively meshed with the two groups of rib teeth through meshing grooves.

[0012] Furthermore, the transmission teeth are engaged with the internal grooves on the inner side of the rotating ring. There are two groups of rotating rings. Both groups of rotating rings are rotatably connected through the slip ring and the sliding support ring. A single group of rotating rings corresponds to two groups of transmission components, and the angle formed between the two groups of transmission components is one hundred and eighty degrees.

[0013] Furthermore, an external toothing groove is provided on the outer side of the rotating ring, and the output end of the motor is meshed with the external toothing groove through a gear, and the motor is fixed on one side of the sliding support ring.

[0014] Furthermore, an outer ring convex is fixedly connected to the bottom of the boost cylinder, and the outer ring convex and the driving ring plate are in conflict with each other. The boost cylinder drives the sliding support ring as a whole to move up and down inside the stand through the outer ring convex and the driving ring plate.

[0015] Furthermore, the shifting mechanism includes an electric push rod and two sets of fixed handles, the output end of the electric push rod is fixedly connected to the supporting seat through a U-shaped connecting rod, the supporting seat is slidably arranged on the suction cylinder, and the laser head to be detected is mounted on the top of the supporting seat.

[0016] Furthermore, the two groups of fixed handles are respectively fixedly connected to the left and right sides of the suction cylinder, and the fixed handles are movably inserted into the connecting frame through the shaft sleeve, and the two sides of the connecting frame are elastically connected to the bottom of the stand through spring parts.

[0017] A method for using a high-power laser cutting head overall air tightness detection device, comprising the following steps:

[0018] S1. First, hold the fixed handles on both sides of the suction cylinder and press them downward. In this process, the fixed handles will drive the connecting frame to elastically squeeze the spring part. Then, turn the fixed handles to drive the suction cylinder as a whole to reverse under the stand. At this time, place the laser head to be tested into the suction cylinder and engage it with the supporting seat to lift it. Then, reset the suction cylinder.

[0019] S2, start the electric push rod, which is connected to the supporting seat through a U-shaped connecting rod, so that the electric push rod can drive the supporting seat and the laser head to be detected to move upward as a whole inside the suction cylinder, and stop after moving to the specified position, and then start the motor in the four-way shrinking mechanism. The motor directly drives the rotating ring to rotate in the sliding supporting ring through the meshing of the gear and the external meshing groove. At this time, since the internal meshing groove opened on the inner side of the rotating ring is meshed with the transmission teeth in the transmission assembly, the transmission teeth directly drive the counter-teeth and the rib teeth to rotate, and the two groups of counter-teeth are meshed with each other, so as to achieve opposite rotation directions, so that the two groups of rib teeth can directly rotate on both sides of the rib groove plate, thereby driving the rib groove plate as a whole to move to one side;

[0020] S3. During the movement of the rib groove plate, the slider directly drives the sealing rubber plate to move toward the direction of the laser head to be detected. During this process, the four groups of sealing rubber plates are pushed by the four groups of sliders respectively, and the sealing rubber plates are fitted and docked with each other. During this process, a single group of sealing rubber plates will provide a lateral pressure to the other group of sealing rubber plates. In combination with the thrust of the slider on the sealing rubber plate itself, the sealing rubber plate drives the loading frame to move to one side, and at the same time squeezes the pressure spring between the slider. At this time, the four groups of sealing rubber plates will shrink, and finally the surface of the laser head to be detected will be fitted;

[0021] S4. After the sealing rubber sheet is bonded to the surface of the laser head to be inspected, the electric cylinder on the top of the stand drives the booster cylinder to descend until the bottom port of the booster cylinder is bonded to the top surface of the sealing rubber sheet, and the top port of the suction cylinder is also bonded to the bottom of the sealing rubber sheet at this time. Finally, the air inside the suction cylinder is sucked to generate negative pressure inside the suction cylinder, and air is injected into the booster cylinder to generate positive pressure. The air tightness of different positions on the surface of the laser head to be inspected can be understood by detecting the changes in the air pressure inside the suction cylinder.

[0022] The beneficial effects of the present invention are:

[0023] The present invention sets a four-way shrinking mechanism, and when the motor is started, the transmission component can cooperate with the sealing rubber plate to extrude the sealing rubber plate inward. The four groups of sealing rubber plates correspond to the four groups of transmission components respectively, and the sealing rubber plates are fitted together. In this way, a single group of transmission components provides unidirectional pressure to the sealing rubber plates, while the other group of sealing rubber plates will be subjected to a lateral pressure provided by the sealing rubber plates, which will squeeze the pressure springs between the sliders, so that the four groups of sealing rubber plates will show a gradually shrinking movement state between the suction cylinder and the booster cylinder, so as to facilitate the position on the surface of the laser head to be detected to be tightly attached to the position where the connection is required, thereby separating the two chambers of the suction cylinder and the booster cylinder. In this way, only the internal pressure of the suction cylinder and the booster cylinder needs to be controlled, and there is no need to disassemble the laser head to be detected, which effectively ensures the overall airtightness of the laser head to be detected.

[0024] The present invention provides a transposition mechanism, and under the elastic action of the spring member, the suction cylinder can fit with the surface below the sealing rubber plate, and achieve a good resistance effect under the action of suction, and the driving of the electric push rod can also drive the supporting seat inside the suction cylinder to move up and down through the U-shaped connecting rod, thereby changing the actual docking position of the laser head to be detected and the sealing rubber plate, thereby facilitating continuous airtightness detection of the positions of various components on the surface of the laser head to be detected;

[0025] The present invention provides two sets of rotating rings, which correspond to the transmission of two sets of transmission components and the sealing rubber plate respectively. Thus, when facing the surfaces of the laser head to be detected with different sizes and shapes, only a single set of rotating rings needs to be driven by a motor to rotate, so as to drive the sealing rubber plate to move in opposite directions for laminating and clamping operations. This can effectively adapt to the laminating operations of the surfaces of the laser head to be detected with different shapes and rectangular sizes, and has a strong adaptability.

[0026] The present invention fixes the handle so that after the spring member is squeezed by the connecting frame, the suction cylinder can be rotated at the same time, thereby facilitating the loading and unloading of the laser head to be inspected, effectively improving the inspection efficiency and saving the inspection time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of a device for detecting overall air tightness of a high-power laser cutting head proposed by the present invention;

[0029] Figure 2 A schematic diagram of the connection position of a tray assembly of an overall air tightness detection device for a high-power laser cutting head proposed by the present invention;

[0030] Figure 3A schematic diagram of a partial half-section structure of a booster cylinder position of an overall air tightness detection device for a high-power laser cutting head proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the appearance structure of a tray assembly for an overall air tightness detection device for a high-power laser cutting head proposed by the present invention;

[0032] Figure 5 A schematic diagram of the internal structure connection of a tray assembly for an overall air tightness detection device for a high-power laser cutting head proposed by the present invention;

[0033] Figure 6 A half-section schematic diagram of the internal structure of a suction cylinder of an overall air tightness detection device for a high-power laser cutting head proposed by the present invention;

[0034] Figure 7 This is a schematic diagram of the partial structure disassembly of a four-way shrinking mechanism for an overall air tightness detection device for a high-power laser cutting head proposed by the present invention;

[0035] Figure 8 The present invention proposes a device for detecting the overall air tightness of a high-power laser cutting head. Figure 1 A schematic diagram of the enlarged structure of point A;

[0036] Fig. 9 The present invention proposes a device for detecting the overall air tightness of a high-power laser cutting head. Figure 5 Enlarged schematic diagram of the structure at point B.

[0037] In the figure: 1. stand; 2. suction cylinder; 3. booster cylinder; 4. tray assembly; 5. four-way shrinking mechanism; 6. sealing rubber plate; 7. shifting mechanism; 8. laser head to be detected; 41. sliding support ring; 42. driving ring plate; 43. outer ring convex; 51. loading frame; 52. slider; 53. pressure spring; 54. rib groove plate; 55. transmission assembly; 56. rotating ring; 57. inner meshing groove; 58. outer meshing groove; 59. motor; 71. electric push rod; 72. U-shaped connecting rod; 73. supporting seat; 74. fixed handle; 75. connecting frame; 76. spring member; 551. rib meshing teeth; 552. counter meshing teeth; 553. transmission teeth. DETAILED DESCRIPTION

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0039] refer to Figure 1-9, including a stand 1, the top of the stand 1 drives the booster cylinder 3 to move up and down on the upper inner side of the stand 1 through an electric cylinder, a suction cylinder 2 is arranged at the lower inner side of the stand 1, the suction cylinder 2 and the booster cylinder 3 are both connected to the external detection component through an air pipe, and a tray assembly 4 is slidably mounted on the stand 1 near the relative plane position of the suction cylinder 2 and the booster cylinder 3, the tray assembly 4 includes a sliding support ring 41 and a driving ring plate 42, and the driving ring plate 42 is fixed on the top of the sliding support ring 41; four groups of sealing rubber plates 6, four groups of sealing rubber plates 6 are distributed in a circular array on the opposite sides of the suction cylinder 2 and the booster cylinder 3, the sealing rubber plates 6 are moved on the inner side of the tray assembly 4 through a four-way shrinking mechanism 5 to resist and fit the surface of the laser head 8 to be detected; the laser head 8 to be detected moves up and down in the suction cylinder 2 through a transposition mechanism 7, and the suction cylinder 2 is movably connected to the stand 1 through the transposition mechanism 7.

[0040] In the present embodiment, the inner side of the stand 1 is divided into three positions: upper, middle and lower. The upper part drives the booster cylinder 3 to move up and down through the electric cylinder, the middle part directly slides and sets up the tray assembly 4, and the lower part controls the suction cylinder 2 through the transposition mechanism 7; specifically: the laser head 8 to be detected is set up inside the suction cylinder 2 through the transposition mechanism 7 under the stand 1, and the laser head 8 to be detected is moved up and down inside the suction cylinder 2 through the transposition mechanism 7. This effect facilitates changing the docking position of the laser head 8 to be detected and the sealing rubber plate 6, thereby changing the detection target. The actual operation is that after the laser head 8 to be detected is lifted a distance at one end inside the suction cylinder 2, it is connected with the four groups of sealing rubber plates. The contact position of the plate 6 changes. At this time, the four-way shrinking mechanism 5 in the tray assembly 4 drives the four groups of sealing plates 6 to realize the clamping operation of the four end faces of the laser head 8 to be detected, so as to respectively clamp the upper and lower parts of the laser head 8 to be detected. Then the booster cylinder 3 and the suction cylinder 2 can simultaneously fit the upper and lower surfaces of the sealing plates 6. At this time, the air inside the suction cylinder 2 is sucked away to achieve negative pressure, and the booster cylinder 3 is filled with air to achieve positive pressure. The air pressure is blocked by the sealing plate 6 and can only enter the inside of the suction cylinder 2 through the gap in the surface assembly of the laser head 8 to be detected. In this way, the air pressure change can be detected inside the suction cylinder 2, thereby achieving the detection purpose.

[0041] refer to Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig. 9The four-way shrinking mechanism 5 includes a loading frame 51, a transmission assembly 55 and two groups of motors 59. The sealing rubber sheet 6 is fixed on one side of the loading frame 51. A slider 52 is slidably limited in the loading frame 51 through a slide groove. The slider 52 is elastically connected to the inner wall of the loading frame 51 through a pressure spring 53. The outer position of the slider 52 is fixedly connected to a rib groove plate 54. The rib groove plate 54 is meshed and transmitted with the transmission assembly 55. The rib groove plate 54 is slidably connected to the sliding support ring 41. The angle formed by the vector directions of two adjacent groups of sealing rubber sheets 6 is ninety degrees, and two adjacent edges of a single group of sealing rubber sheets 6 are respectively attached to the two groups of sealing rubber sheets 6.

[0042] In this embodiment, the four groups of sealing rubber sheets 6 correspond to the four groups of transmission components 55 and the loading frame 51 respectively. The loading frame 51 directly clamps the sealing rubber sheets 6. When the transmission component 55 is running, the rib groove plate 54 can be subjected to force to perform a pushing operation. At this time, the rib groove plate 54 directly drives the loading frame 51, the slider 52 and the sealing rubber sheets 6 to move to one side, and the four groups of sealing rubber sheets 6 are fitted to each other and have different movement directions. This will produce an effect: a single group of sealing rubber sheets 6 will be subjected to forces in two directions, one is the unidirectional force provided by the loading frame 51 to approach the laser head 8 to be detected, and the other is the pushing force provided by the sealing rubber sheet 6 on the other side. At this time, the actual movement direction of the sealing rubber sheet 6 is oblique movement. The synchronous movement of the four groups of sealing rubber sheets 6 will reduce the shrinkage therein until it gradually fits tightly with the four end faces of the laser head 8 to be detected, thereby realizing the separation operation of the suction cylinder 2 and the booster cylinder 3 as a whole through the resistance of the sealing rubber sheets 6; specifically: the sealing rubber sheet 6 is subjected to force and drives the loading frame 51 to move in the direction of the slider 52, while squeezing the pressure spring 53. During this process, the sealing rubber sheets 6 will slide against each other. In order to prevent the occurrence of excessive friction and jamming, a lubricating oil liquid can be applied to the surface of the sealing rubber sheet 6 to assist, which will not be elaborated here.

[0043] refer to Figure 1 The transmission assembly 55 includes two groups of teeth 552 and transmission teeth 553. The two groups of teeth 552 mesh with each other. The transmission teeth 553 are fixed on the back side of the single group of teeth 552. The front sides of the two groups of teeth 552 are respectively fixed with rib teeth 551. The two sides of the rib groove plate 54 respectively mesh with the two groups of rib teeth 551 through meshing grooves. The transmission teeth 553 mesh with the inner meshing grooves 57 on the inner side of the rotating ring 56. There are two groups of rotating rings 56. Both groups of rotating rings 56 are rotatably connected through the slip ring and the sliding support ring 41. The single group of rotating rings 56 corresponds to two groups of transmission assemblies 55, and the angle formed between the two groups of transmission assemblies 55 is 180 degrees. The outer side of the rotating ring 56 is provided with an outer meshing groove 58. The output end of the motor 59 meshes with the outer meshing groove 58 through a gear. The motor 59 is fixed on one side of the sliding support ring 41.

[0044] In this embodiment, the movement effect of the sealing rubber plate 6 is controlled by the transmission component 55, and the transmission component 55 includes a pair of teeth 552 and a transmission tooth 553. Here, the rib teeth 551 directly mesh with both sides of the rib groove plate 54, and the pair of teeth 552 mesh with each other. In this way, after the pair of teeth 552 rotates, the rib teeth 551 can drive the rib groove plate 54 to move to one side. The transmission tooth 553 is fixed on the back side of the single set of teeth 552. The transmission tooth 553 is affected by the transmission of the inner meshing groove 57 on the inner side of the rotating ring 56, so that the rotating ring 56 rotates. The transmission assembly 55 can be directly driven to operate; an external meshing groove 58 is provided on the outer side of the rotating ring 56, and the output end of the motor 59 is meshed with the external meshing groove 58 through a gear, so that the motor 59 can directly drive the rotating ring 56 to rotate after being driven. At this time, two groups of rotating rings 56 are set to correspond to the control of two groups of transmission assemblies 55 and the sealing rubber sheet 6 respectively, so that a single group of motors 59 can be driven to realize the object clamping operation of the two groups of sealing rubber sheets 6, thereby performing the clamping and fitting operation on the rectangular assemblies of different sizes of the laser head 8 to be detected.

[0045] refer to Figure 2 and Figure 8 The bottom of the boost cylinder 3 is fixedly connected with an outer ring protrusion 43, and the outer ring protrusion 43 and the driving ring plate 42 are in conflict with each other. The boost cylinder 3 drives the sliding support ring 41 as a whole to move up and down inside the stand 1 through the outer ring protrusion 43 and the driving ring plate 42.

[0046] In the present embodiment, the setting of the outer ring convexity 43 enables the booster cylinder 3 to be driven by the electric cylinder on the top of the stand 1 to first separate the bottom end face of the booster cylinder 3 from the top face of the sealing rubber plate 6, and then the outer ring convexity 43 and the driving ring plate 42 are contacted to drive the sliding support ring 41 as a whole and even the four-way shrinking mechanism 5 and the sealing rubber plate 6 as a whole to rise, so that the booster cylinder 3, the suction cylinder 2 and the sealing rubber plate 6 can be separated, thereby facilitating the up and down movement of the laser head 8 to be detected and changing the actual detection position. The overall detection does not rely on manual control operations, so that the detection continuity is enhanced.

[0047] refer to Figure 6 and Figure 8 The shifting mechanism 7 includes an electric push rod 71 and two sets of fixed handles 74. The output end of the electric push rod 71 is fixedly connected to a supporting seat 73 through a U-shaped connecting rod 72. The supporting seat 73 is slidably arranged on the suction cylinder 2, and the laser head 8 to be detected is mounted on the top of the supporting seat 73. The two sets of fixed handles 74 are respectively fixedly connected to the left and right sides of the suction cylinder 2. The fixed handles 74 movably penetrate the connecting frame 75 through the shaft sleeve. The two sides of the connecting frame 75 are elastically connected to the bottom of the stand 1 through spring members 76.

[0048] In this embodiment, after being started, the electric push rod 71 can directly drive the supporting seat 73 to move up and down inside the suction cylinder 2 through the U-shaped connecting rod 72, thereby lifting the laser head 8 to be detected to move up and down, changing the docking position between it and the sealing rubber plate 6, and thus changing the detection position, and the two sides of the suction cylinder 2 are respectively connected to the fixed handles 74. After pressing the fixed handles 74, the spring member 76 can be squeezed through the connecting frame 75, so that the suction cylinder 2 as a whole elastically decreases under the stand 1, thereby loosening the contact between the suction cylinder 2 and the sealing rubber plate 6, and then the suction cylinder 2 can be reversed by rotating the fixed handle 74 to replace or load and unload the laser head 8 to be detected.

[0049] A method for using a high-power laser cutting head overall air tightness detection device, comprising the following steps:

[0050] S1. First, hold the fixed handles 74 on both sides of the suction cylinder 2 and press downward. In this process, the fixed handles 74 will drive the connecting frame 75 to elastically squeeze the spring member 76. Then, rotate the fixed handles 74 to drive the suction cylinder 2 to reverse as a whole under the stand 1. At this time, place the laser head 8 to be detected into the suction cylinder 2 and engage and lift it with the supporting seat 73, and then reset the suction cylinder 2.

[0051] S2, start the electric push rod 71, which is connected to the supporting seat 73 through the U-shaped connecting rod 72, so that the electric push rod 71 can drive the supporting seat 73 and the laser head 8 to be detected to move upward as a whole inside the suction cylinder 2, and stop after moving to the specified position, and then start the motor 59 in the four-way shrinking mechanism 5. The motor 59 directly drives the rotating ring 56 to rotate in the sliding supporting ring 41 through the meshing of the gear and the external meshing groove 58. At this time, since the internal meshing groove 57 provided on the inner side of the rotating ring 56 is meshed with the transmission teeth 553 in the transmission assembly 55, the transmission teeth 553 directly drive the counter teeth 552 and the rib teeth 551 to rotate, and the two groups of counter teeth 552 are meshed with each other, so as to realize the opposite rotation direction, so that the two groups of rib teeth 551 can directly rotate on both sides of the rib groove plate 54, thereby driving the rib groove plate 54 to move to one side as a whole;

[0052] S3, during the movement of the rib groove plate 54, the slider 52 directly drives the sealing rubber plate 6 to move toward the direction of the laser head 8 to be detected. During this process, the four groups of sealing rubber plates 6 are pushed by the four groups of sliders 52 respectively, and the sealing rubber plates 6 are fitted and docked with each other. During this process, a single group of sealing rubber plates 6 will provide a lateral pressure to the other group of sealing rubber plates 6, and the sealing rubber plates 6 themselves are pushed by the slider 52, so that the sealing rubber plates 6 drive the loading frame 51 to move to one side, and at the same time squeeze the pressure spring 53 between the slider 52. At this time, the four groups of sealing rubber plates 6 will shrink, and finally the surface of the laser head 8 to be detected is fitted;

[0053] S4. After the sealing rubber sheet 6 is fitted to the surface of the laser head 8 to be inspected, the electric cylinder on the top of the stand 1 drives the booster cylinder 3 to descend until the bottom port of the booster cylinder 3 fits with the top surface of the sealing rubber sheet 6, and the top port of the suction cylinder 2 also fits with the bottom of the sealing rubber sheet 6 at this time. Finally, the air inside the suction cylinder 2 is sucked to generate negative pressure inside the suction cylinder 2, and air is injected into the booster cylinder 3 to generate positive pressure. The air tightness of different positions on the surface of the laser head 8 to be inspected is understood by detecting the changes in the air pressure inside the suction cylinder 2.

[0054] Working principle: First, by pressing the fixed handles 74 on both sides of the suction cylinder 2, under the connection of the connecting frame 75 and the spring member 76, the suction cylinder 2 as a whole elastically drops under the stand 1, and then the fixed handles 74 are rotated to drive the suction cylinder 2 to reverse, and the laser head 8 to be detected is placed inside the suction cylinder 2 and engaged with the support seat 73, and then the suction cylinder 2 is reset and stabilized. At this time, the two sets of motors 59 on the surface of the sliding support ring 41 are driven to drive the rotating ring 56 to rotate inside the sliding support ring 41 through the meshing of the gears and the external meshing grooves 58. At this time, the rotation effect of the rotating ring 56 can The inner meshing groove 57 inside the inner meshing groove 57 is driven to rotate, and the transmission assembly 55 and the rib groove plate 54 are integrally restricted on the sliding support ring 41, so that the inner meshing groove 57 can drive the transmission teeth 553 to rotate, and the pair of meshing teeth 552 are fixed below the transmission teeth 553. The two groups of meshing teeth 552 are meshed with each other, so that the two groups of rib meshing teeth 551 can be driven to rotate on both sides of the rib groove plate 54. At this time, the rib groove plate 54 is subjected to the meshing force and moves to one side, and the loading frame 51 and the sealing rubber plate 6 are driven to move as a whole through the slider 52. The four groups of sealing rubber plates 6 move relative to each other at this time. Under the push, the loading frame 51 can be forced to move toward one side of the slider 52, and at the same time squeeze the pressure spring 53, so that the six groups of sealing rubber plates 6 can show oblique movement, so that the shrinkage is reduced until it fits and contacts with the surface of the laser head 8 to be detected, and then the top of the stand 1 drives the booster cylinder 3 to descend through the electric cylinder to fit and contact with the top surface of the sealing rubber plate 6, otherwise the booster cylinder 3 rises and separates from the surface of the sealing rubber plate 6, and then contacts with the driving ring plate 42 through the outer ring convex 43. Under continuous movement, the tray assembly 4 can be driven to rise as a whole, and the suction cylinder 2 is also able to fit with the sealing rubber plate under the action of the spring member 76. 6, and then the suction cylinder 2 realizes the extraction of internal air through the suction tube, and gas is injected into the booster cylinder 3. The gas can only enter the suction cylinder 2 through the gap of the laser head 8 to be detected under the obstruction of the sealing rubber plate 6, so that the air tightness detection operation of the laser head 8 to be detected can be realized by detecting the internal air pressure value of the suction cylinder 2. Finally, the electric push rod 71 drives the supporting seat 73 to rise inside the suction cylinder 2 through the U-shaped connecting rod 72, thereby driving the laser head 8 to be detected to rise as a whole, thereby changing the actual detection position of the laser head 8 to be detected, thereby completing the whole set of detection operations.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the overall air tightness of a high-power laser cutting head, characterized in that: The invention comprises a stand (1), wherein the top of the stand (1) drives a booster cylinder (3) to move up and down above the inner side of the stand (1) through an electric cylinder, a suction cylinder (2) is arranged below the inner side of the stand (1), and both the suction cylinder (2) and the booster cylinder (3) are connected to an external detection component through an air pipe, and a tray assembly (4) is slidably mounted on the stand (1) at a relative plane position close to the suction cylinder (2) and the booster cylinder (3), and the tray assembly (4) comprises a sliding support ring (41) and a driving ring plate (42), and the driving ring plate (42) is fixed on the top of the sliding support ring (41); Four groups of sealing rubber plates (6), the four groups of sealing rubber plates (6) being arranged in an annular array on opposite sides of the suction cylinder (2) and the boost cylinder (3), the sealing rubber plates (6) being moved on the inner side of the tray assembly (4) through a four-way shrinking mechanism (5) to contact and fit the surface of the laser head (8) to be detected; The laser head (8) to be detected moves up and down in the suction cylinder (2) via a transposition mechanism (7), and the suction cylinder (2) is movably connected to the stand (1) via the transposition mechanism (7); The four-way shrinking mechanism (5) comprises a loading frame (51), a transmission assembly (55) and two groups of motors (59); the sealing rubber plate (6) is fixed on one side of the loading frame (51); a slider (52) is provided in the loading frame (51) for sliding movement through a sliding groove; the slider (52) is elastically connected to the inner wall of the loading frame (51) through a pressure spring (53); the outer position of the slider (52) is fixedly connected to a rib groove plate (54); the rib groove plate (54) is meshed with the transmission assembly (55) for transmission; the rib groove plate (54) is slidably connected to the sliding support ring (41); the angle formed by the vector directions of two adjacent groups of sealing rubber plates (6) is ninety degrees, and two adjacent edges of a single group of sealing rubber plates (6) are respectively attached to the two groups of sealing rubber plates (6); The transmission assembly (55) comprises two groups of meshing teeth (552) and transmission teeth (553), the two groups of meshing teeth (552) meshing with each other, the transmission teeth (553) being fixed on the back side of the single group of meshing teeth (552), the front sides of the two groups of meshing teeth (552) being respectively fixed with rib teeth (551), the two sides of the rib groove plate (54) being respectively meshed with the two groups of rib teeth (551) through meshing grooves, the transmission teeth (553) being meshed with the inner meshing grooves (57) on the inner side of the rotating ring (56), the There are two groups of rotating rings (56), and both groups of rotating rings (56) are rotatably connected via a slip ring and a sliding support ring (41). A single group of rotating rings (56) corresponds to two groups of transmission components (55), and the angle formed between the two groups of transmission components (55) is 180 degrees. An external toothing groove (58) is provided on the outer side of the rotating ring (56), and an output end of the motor (59) is meshed with the external toothing groove (58) via a gear. The motor (59) is fixed to one side of the sliding support ring (41).

2. The device for detecting the overall air tightness of a high-power laser cutting head according to claim 1, characterized in that: The bottom of the boost cylinder (3) is fixedly connected to an outer ring protrusion (43), the outer ring protrusion (43) and the driving ring plate (42) are in contact with each other, and the boost cylinder (3) drives the sliding support ring (41) to move up and down as a whole inside the stand (1) through the outer ring protrusion (43) and the driving ring plate (42).

3. The device for detecting the overall air tightness of a high-power laser cutting head according to claim 1, characterized in that: The shifting mechanism (7) comprises an electric push rod (71) and two sets of fixed handles (74); the output end of the electric push rod (71) is fixedly connected to a supporting seat (73) via a U-shaped connecting rod (72); the supporting seat (73) is slidably arranged on the suction cylinder (2); and the laser head (8) to be detected is mounted on the top of the supporting seat (73).

4. The device for detecting overall air tightness of a high-power laser cutting head according to claim 3, characterized in that: The two sets of fixed handles (74) are respectively fixedly connected to the left and right sides of the suction cylinder (2); the fixed handles (74) movably penetrate the connecting frame (75) via a shaft sleeve; and the two sides of the connecting frame (75) are elastically connected to the bottom of the stand (1) via spring members (76).

5. A method for using the overall air tightness detection device for a high-power laser cutting head according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. First, the fixed handles (74) on both sides of the suction cylinder (2) are held and pressed downward. During this process, the fixed handles (74) drive the connecting frame (75) to elastically squeeze the spring member (76). Then, the fixed handles (74) are rotated to drive the suction cylinder (2) as a whole to flip under the stand (1). At this time, the laser head (8) to be detected is placed in the suction cylinder (2) and engaged with the supporting seat (73) to lift it. Then, the suction cylinder (2) is reset. S2, start the electric push rod (71), which is connected to the support seat (73) through the U-shaped connecting rod (72), so that the electric push rod (71) can drive the support seat (73) and the laser head (8) to be detected to move upward inside the suction cylinder (2) as a whole, and stop after moving to a specified position, and then start the motor (59) in the four-way shrinking mechanism (5). The motor (59) directly drives the rotating ring (56) to rotate on the slide through the meshing of the gear and the external meshing groove (58). In the movable support ring (41), at this time, since the internal meshing groove (57) provided on the inner side of the rotating ring (56) meshes with the transmission teeth (553) in the transmission assembly (55), the transmission teeth (553) directly drive the counter teeth (552) and the rib teeth (551) to rotate, and the two groups of counter teeth (552) mesh with each other, thereby realizing the opposite rotation directions. In this way, the two groups of rib teeth (551) can directly rotate on both sides of the rib groove plate (54), thereby driving the rib groove plate (54) to move to one side as a whole; S3, during the movement of the rib groove plate (54), the slider (52) directly drives the sealing rubber plate (6) to move in the direction of the laser head (8) to be detected. During this process, the four groups of sealing rubber plates (6) are pushed by the four groups of sliders (52) respectively, and the sealing rubber plates (6) are fitted and docked with each other. During this process, a single group of sealing rubber plates (6) provides a lateral pressure to the other group of sealing rubber plates (6), and the sealing rubber plates (6) themselves are pushed by the slider (52), so that the sealing rubber plates (6) drive the loading frame (51) to move to one side, and at the same time squeeze the pressure spring (53) between the slider (52). At this time, the four groups of sealing rubber plates (6) will shrink, and finally the surface of the laser head (8) to be detected is fitted; S4. After the sealing rubber sheet (6) is bonded to the surface of the laser head (8) to be inspected, the electric cylinder on the top of the stand (1) drives the booster cylinder (3) to descend until the bottom port of the booster cylinder (3) is bonded to the top surface of the sealing rubber sheet (6), and the top port of the suction cylinder (2) is also bonded to the bottom of the sealing rubber sheet (6). Finally, the air inside the suction cylinder (2) is sucked to generate negative pressure inside the suction cylinder (2), and air is injected into the booster cylinder (3) to generate positive pressure. The air tightness of different positions on the surface of the laser head (8) to be inspected is understood by detecting the change in air pressure inside the suction cylinder (2).

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