Positioning jig for laser processing of notebook computer shell

Abstract

The invention relates to a positioning jig for laptop shell laser processing, which relates to the related technical field of jigs for laser processing, and comprises a base, a conveying device, a multi-degree-of-freedom manipulator, a workbench, a laser processing device, an electric drive sliding rail, a sliding plate, a placing table, a supporting device, a clamping device and a positioning detection device, the problems that in the prior art, buckling deformation possibly generated due to injection molding stress or in the transferring process of the shell is not considered, so that the preset position of laser cutting deviates from the actual position, the pouring gate cutting precision and consistency are seriously influenced, the shell is damaged while the pouring gate is not completely removed, and the product quality is influenced can be solved. The problems that waste generated by cutting cannot be effectively collected in time and can be splashed to other places or accumulated in equipment after being cut, and in addition, when a shell is fixed through a traditional rigid clamping and supporting mode, the risk that the appearance face of a product is scratched exists are solved.

Description

Technical Field

[0001] This invention relates to the technical field of laser processing fixtures, and in particular to a positioning fixture for laser processing of notebook casings. Background Technology

[0002] As a precision-manufactured product, laptops are robust in structure, slim and beautiful in design, and combine high performance with excellent heat dissipation. Thanks to the highly efficient and automated production of components such as the casing, the products have good consistency and stable and controllable quality, making them ideal tools for modern mobile office work. In the production process, the laptop casing is formed by injection molding. The injection gate, which is attached to the injection molding process, needs to be precisely removed by laser. During the removal process, a fixture is required to position it.

[0003] Existing laser processing fixtures, such as Chinese Patent Publication No. CN222536620U, disclose a positioning fixture and laser processing equipment for positioning a laptop casing. The laptop casing includes a bottom shell and a back shell connected to the bottom shell. The positioning fixture includes: a base plate assembly for supporting the bottom shell of the laptop casing; a back plate assembly mounted on the base plate assembly for supporting the back shell of the laptop casing; and a fixing assembly mounted on the base plate assembly, including an elastic element, an abutment element, and a stop block. The stop block is mounted on the side of the base plate assembly away from the back plate assembly. The abutment element is movably mounted on the base plate assembly and disposed between the back plate assembly and the stop block. The elastic element is disposed between the abutment element and the stop block. The embodiments of this application can accurately position the laptop casing, prevent the laptop casing from moving during processing, and improve the yield rate.

[0004] However, existing technologies do not consider the potential warping and deformation of the casing due to injection stress or during transportation, which can cause the predetermined position of the laser cutting to deviate from the actual position, severely affecting the accuracy and consistency of gate removal. This can damage the casing itself while the gate is not completely removed, and the waste generated during cutting cannot be collected in a timely and effective manner. It may splatter elsewhere or accumulate inside the equipment after cutting. In addition, traditional rigid clamping and support methods pose a risk of scratching the product's appearance when fixing the casing. Based on the above technical pain points, this application designs a positioning fixture for laser processing of notebook casings that integrates flatness detection, adaptive support, and waste management. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning fixture for laser processing of notebook housings, aiming to improve positioning efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A positioning fixture for laser processing of laptop casings includes: a base; a conveying device installed on the rear left side of the base; a multi-degree-of-freedom robot installed on the front right side of the base; a worktable installed on the rear right side of the base, with a laser processing device mounted on the rear upper side of the worktable for laser processing of the laptop casing; an electric drive slide rail installed on the front upper side of the worktable, with a sliding plate slidably mounted on the slide rail, connected to a placement table via a support frame; a support device slidably positioned in the middle of the placement table, providing intermittent support for the laptop casing and collecting laser-cut waste materials in a segmented manner; a clamping device for clamping and positioning both ends of the laptop casing, and the clamping device is symmetrically arranged on both sides; and a positioning detection device that works in conjunction with the clamping device and the support device, for detecting the flatness of both ends of the laptop casing and for air suction positioning.

[0007] As a preferred embodiment of the present invention, the placement platform includes a connecting plate, which is connected to a fixed plate via a longitudinal rod. The fixed plate is connected to the placement platform via a support frame, and a U-shaped support frame is provided in the middle of the connecting plate.

[0008] As a preferred embodiment of the present invention, the support device includes a conveying frame, with extrusion blocks symmetrically installed on the lower end of the conveying frame. The lower middle interface of the conveying frame is connected to a positive and negative pressure switching pneumatic system via a telescopic tube. The positive and negative pressure switching pneumatic system is installed on the lower end of the fixed plate. Support members are evenly installed on the upper end of the conveying frame. The support frame is located in the built-in groove of the connecting plate. The lower slope of the extrusion block gradually slopes downward from the outside to the inside.

[0009] As a preferred embodiment of the present invention, the support member includes an extension tube, the lower end of which is connected to the conveying frame, the upper end of which is connected to the outer side of the lower end of the support head via a pin, and the support heads arranged symmetrically on the left and right sides are connected by a push-out spring.

[0010] As a preferred embodiment of the present invention, the upper inner side of the support head is an arc-shaped support surface, and the middle part of the support head is provided with an internal cavity. A connecting net is movably arranged between the left and right internal cavities. The upper end of the internal groove is a flared structure, and an elastic buffer is provided on the upper inclined surface of the internal groove.

[0011] As a preferred embodiment of the present invention, the clamping device includes a movable component, which is slidably disposed in a sliding groove opened in the connecting plate. A clamping plate is installed at the upper end of the movable component, a driving cylinder is connected between the movable component and the connecting plate, and an extension member is installed on the inner side of the lower end of the movable component.

[0012] As a preferred embodiment of the present invention, the movable component includes a movable part, which is slidably disposed in a sliding groove. A through groove is provided in the movable part, and a pusher is horizontally slidably disposed in the through groove. A driving cylinder is connected between the outer side of the pusher and the connecting plate. An insert is installed at the inner end of the pusher. The position between the movable part and the pusher is temporarily locked by the longitudinal insertion of a pin. A return spring is connected between the pusher and the movable part.

[0013] As a preferred technical solution of the present invention, the pin is slidably disposed in the longitudinal groove opened at the lower end of the movable part, and the pin and the longitudinal groove are elastically connected. The upper half of the pin in the initial position is inserted into the snap-fit ​​groove opened at the lower end of the pusher. The locking groove corresponding to the position of the pin is opened on one side of the fixed plate, and the outer slope of the locking groove is gradually inclined upward from the inside to the outside.

[0014] As a preferred embodiment of the present invention, the positioning detection device includes a flatness detection component, which is elastically disposed on a connecting plate. An extrusion component that cooperates with the flatness detection component is horizontally slidably disposed in a horizontal groove opened in a fixed plate, and the extrusion component and the horizontal groove are elastically connected. The lower end of the extrusion component is connected to an extrusion rod, which is slidably disposed on the lower end face of the fixed plate. The inner arc-shaped surface of the extrusion rod and the lower inclined surface of the extrusion block are used for extrusion cooperation. A connecting pipe is installed on the fixed plate. A sliding pipe is slidably disposed on the upper end of the connecting pipe. A pressure block is disposed on the side wall of the sliding pipe. An air suction head is installed on the upper end of the sliding pipe. The lower end of the connecting pipe is connected to an air pump, and the air pump is connected to the fixed plate through an air pump seat.

[0015] As a preferred embodiment of the present invention, the inclined surface of the pressure block is in contact with the ball bearing, and the ball bearing is rolled at the corner position of the extrusion piece.

[0016] As a preferred embodiment of the present invention, the flatness detection component includes a movable rod, which is slidably disposed in the movable cavity opened in the connecting plate, and a working spring is connected between the movable rod and the movable cavity. A positioning component is provided at the upper end of the movable rod, and a connecting rod is installed at the lower end of the movable rod. An alignment groove is opened in the middle of the connecting rod, and the alignment groove corresponds to the position of the extension component.

[0017] In summary, this application includes the following beneficial technical effects: 1. After the laptop casing is placed, the present invention clamps both ends of it using a clamping device. Then, a positioning detection device performs multi-point positioning detection on both ends to determine whether the flatness meets the requirements. Flatness detection effectively avoids laser cutting position deviation caused by material deformation, significantly improving processing accuracy and consistency. After meeting the requirements, the laptop casing is intermittently supported at the bottom by a support device. During cutting, the support rises to fit the casing, and waste material can fall smoothly through the hollow area. After cutting, the support descends and becomes flush with the table surface to form a complete plane, which greatly facilitates the centralized cleaning and collection of waste material and avoids splashing.

[0018] After the flatness test is passed, this application uses a support component to provide vibration-damping support for the laptop casing, thereby offsetting the micro-vibrations caused by laser cutting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the structure between the electric drive slide rail, sliding plate, placement platform, support device, clamping device, and positioning detection device of the present invention. Figure 4 This is a cross-sectional view of the placement platform, support device, clamping device, and positioning detection device of the present invention; Figure 5 This is the present invention. Figure 4 A partial schematic diagram; Figure 6 This is the present invention. Figure 5 Enlarged view of part X Figure 7 This is the present invention. Figure 4 A magnified view of the area at point Y; Figure 8 This is a structural diagram of a laptop casing.

[0020] Explanation of reference numerals in the attached drawings: 1. Base; 2. Conveying device; 3. Multi-DOF robot; 4. Worktable; 41. Laser processing device; 5. Electric drive slide rail; 51. Sliding plate; 52. Placement platform; 521. Connecting plate; 522. Longitudinal rod; 523. Fixing plate; 524. Support frame; 53. Waste material; 6. Support device; 61. Conveying frame; 62. Extrusion block; 63. Positive and negative pressure switching pneumatic system; 64. Support component; 641. Extending tube; 642. Support head; 643. Push-out spring; 644. Connecting net; 645. Elastic buffer. Components; 65. Built-in slot; 7. Clamping device; 71. Movable component; 711. Movable part; 712. Pushing part; 713. Pin part; 714. Return spring; 715. Locking slot; 72. Clamping plate; 73. Drive cylinder; 74. Insertion part; 8. Positioning detection device; 81. Flatness detection part; 811. Movable rod; 812. Positioning part; 813. Connecting rod; 814. Alignment slot; 82. Extrusion part; 83. Extrusion rod; 84. Connecting pipe; 85. Sliding pipe; 86. Pressure block; 87. Air suction head; 88. Air pump. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1 to 8 This application will be described in further detail.

[0022] This application discloses a positioning fixture for laser processing of laptop shells. This application detects the flatness of the laptop shell by performing multi-point positioning at both ends. When the flatness meets the requirements, laser cutting of waste is carried out, avoiding the cutting deviation caused by uneven shell. In addition, this application is intermittently supported at the bottom during cutting and the waste is collected in a partitioned manner after cutting.

[0023] Reference Figures 1 to 4As shown in the figure, this embodiment discloses a positioning fixture for laser processing of notebook casings, including a base 1, a conveying device 2, a multi-degree-of-freedom robot arm 3, a worktable 4, a laser processing device 41, an electric drive slide rail 5, a sliding plate 51, a placement stage 52, a support device 6, a clamping device 7, and a positioning detection device 8. The base 1 serves as a fixed foundation. The conveying device 2 is installed on the rear left side of the base 1. The multi-degree-of-freedom robot arm 3 is installed on the front right side of the base 1. The worktable 4 is installed on the rear right side of the base 1. The laser processing device 41 is installed on the rear upper side of the worktable 4. The laser processing device 41 performs laser processing operations on the notebook casing. The electric drive slide rail 5 is installed... On the upper front side of the workbench 4, a sliding plate 51 is slidably mounted on the electric drive slide rail 5. The sliding plate 51 is connected to the placement platform 52 via a support frame. The support device 6 is slidably mounted in the middle of the placement platform 52. The support device 6 provides intermittent support for the laptop casing and collects the waste material 53 that falls off the laser cutting device in a partitioned manner. The clamping device 7 is used to clamp and position both ends of the laptop casing. The clamping device 7 is arranged symmetrically on the left and right. The positioning detection device 8 is used in conjunction with the clamping device 7 and the support device 6. The positioning detection device 8 detects the flatness of both ends of the laptop casing and performs air suction positioning.

[0024] In the actual processing, the injection-molded laptop casing is conveyed by the conveying device 2 (existing technology). Subsequently, the multi-degree-of-freedom robot 3 (existing technology) moves the laptop casing onto the stage 52. The clamping device 7 clamps and positions both ends of the casing. Then, the positioning detection device 8 performs multi-point positioning on both ends of the laptop casing to detect its overall flatness. If the flatness meets the requirements, the positioning detection device 8 performs air suction positioning on the lower end of the laptop casing. Simultaneously, the support device 6 rises under pressure to intermittently support the lower end surface of the laptop casing. The laser processing device 41 (existing technology) removes residual casting gate waste 53 (such as...) from the laptop casing. Figure 8 Laser cutting is performed on the waste material 53 (as shown). After cutting, the waste material 53 falls onto the placement table 52. After cutting is completed, the support device 6, clamping device 7, and positioning detection device 8 in this application are reset. Subsequently, the laptop shell is moved back to the conveying device 2 for transfer by the multi-degree-of-freedom robot 3.

[0025] Reference Figure 4 As shown, this application takes into account the drop position of the waste 53 after cutting, and makes further improvements to the structure of the placement platform 52 and the support device 6. The structure is as follows: the placement platform 52 includes a connecting plate 521, the connecting plate 521 is connected to the fixing plate 523 through a longitudinal rod 522, the fixing plate 523 is connected to the placement platform 52 through a support frame, and a U-shaped support frame 524 is provided in the middle of the connecting plate 521.

[0026] Reference Figure 5 , Figure 6 As shown, the support device 6 includes a conveying frame 61, with extrusion blocks 62 symmetrically installed on the lower end of the conveying frame 61. The lower middle interface of the conveying frame 61 is connected to the positive and negative pressure switching pneumatic system 63 through a telescopic tube. The positive and negative pressure switching pneumatic system 63 is installed on the lower end of the fixed plate 523. Support members 64 are evenly installed on the upper end of the conveying frame 61. The support frame 64 is located in the built-in groove 65 opened in the connecting plate 521. The lower slope of the extrusion block 62 gradually slopes downward from the outside to the inside.

[0027] During the actual support process, when the extrusion block 62 is pressed, the drive conveyor frame 61 drives the support member 64 to rise until its top is completely in contact with the lower end of the notebook shell, thereby achieving reliable support for the shell. In this design, the support member 64 is arranged in an intermittent manner, which ensures the support effect while retaining the hollow area under the shell, so that the waste material 53 generated by cutting can fall smoothly onto the connecting plate 521 for collection. When no support is needed, the support member 64 descends and resets to the initial position. At this time, the upper surface of the connecting plate 521 and the top of the support member together form a complete horizontal plane. The formation of this horizontal plane makes it easy to collect and sweep away the waste material 53 on the connecting plate 521 during cleaning.

[0028] It should be noted that the positive and negative pressure switching pneumatic system 63 is existing technology. It uses compressed air as a power source and controls the airflow path through a three-position five-way solenoid valve. When the valve is switched to the first working position, the compressed air drives the vacuum generator to generate negative pressure, thereby performing air suction. When the valve is switched to the second working position, the compressed air is directly output, thereby performing air blowing. Considering the problem of the falling and falling of the waste material 53 after cutting, this application forms an air blowing operation when the extension tube 641 rises, thereby performing an air blowing operation on the surface of the notebook shell. When the support member 64 rises to the highest position for support, an air suction operation is formed inside the extension tube 641, causing the waste material 53 cut around it to fall. When the support member 64 falls, the extension tube 642 blows air again, thereby blowing and cooling the cutting points around it, and blowing up the waste material 53 that has fallen into the open support head 642, preventing the support head 642 from not being able to close.

[0029] Reference Figure 6As shown, considering the possibility of scratches on the surface of the laptop casing during support, this application further improves the structure of the support member 64. The specific structure is as follows: the support member 64 includes an extension tube 641, the lower end of which is connected to the conveying frame 61, and the upper end of the extension tube 641 is connected to the lower outer side of the support head 642 via a pin. The support heads 642, which are symmetrically arranged on the left and right, are connected by a push-out spring 643. The push-out spring 643 always maintains the tendency to push the support heads 642 on both sides in opposite directions. The inner side of the upper end of the support head 642 is an arc-shaped support surface, and an internal cavity 643 is opened in the middle of the support head 642. A connecting net 644 is movably arranged between the internal cavities 643 arranged on the left and right. The design of the connecting net 644 ensures ventilation while avoiding the possibility of waste material 53 directly entering the interior of the extension tube 641. The upper end of the internal groove 65 is a flared structure, and an elastic buffer 645 is provided on the upper inclined surface of the internal groove 65.

[0030] As the support member 64 is lifted by the conveyor frame 61, when it is about to reach the highest position, due to the flared structure design at the upper end of the built-in groove 65, the support heads 642 arranged on the left and right gradually open under the action of the push-out spring 643, thereby supporting the solid part of the notebook shell. During the support process, under the buffering effect formed by the push-out spring 643 and the elastic buffer member 645 pressing against the outer wall of the support head 642, the support head 642 can offset the vibration caused by the cutting of the notebook shell while providing support. This application reduces the occurrence of scratches by expanding the support area (without increasing the support contact surface) and the design of the arc-shaped support surface.

[0031] Reference Figure 3 , Figure 7 As shown, the clamping device 7 includes a movable component 71, which is slidably disposed in a sliding groove opened in the connecting plate 521. A clamping plate 72 is installed at the upper end of the movable component 71, and a driving cylinder 73 is connected between the movable component 71 and the connecting plate 521. An insert 74 is installed on the inner side of the lower end of the movable component 71.

[0032] Reference Figure 7As shown, the movable component 71 includes a movable part 711, which is slidably disposed in a sliding groove. A through groove is formed in the movable part 711, and a pusher 712 is horizontally slidably disposed in the through groove. A drive cylinder 73 is connected between the outer side of the pusher 712 and the connecting plate 521. An insert 74 is installed at the inner end of the pusher 712. The position between the movable part 711 and the pusher 712 is temporarily locked by the longitudinal insertion of a pin 713. A return spring 714 is connected between the pusher 712 and the movable part 711, and the return spring 714 always maintains a downward pushing tendency on the pin 713. The pin 713 is slidably disposed vertically in a longitudinal groove formed at the lower end of the movable part 711. Furthermore, the pin 713 is elastically connected to the longitudinal groove. The upper half of the pin 713 in the initial position is inserted into the snap-fit ​​groove opened at the lower end of the pusher 712. At this time, the lower end face of the pin 713 is in contact with the upper end face of the fixing plate 523. The locking groove 715 corresponding to the position of the pin 713 is opened on one side of the fixing plate 523. The outer slope of the locking groove 715 is gradually inclined upward from the inside to the outside. The lower end of the pin 713 has a rounded corner structure, which reduces the difficulty of the pin 713 being squeezed back. The inner side of the pusher 712 is provided with a limit plate to ensure that the pusher 712 stops when it is pushed back to the initial position. Subsequently, it will move synchronously with the moving part 711.

[0033] During the actual clamping process, the moving part 711, the clamping plate 72, and the pushing part 712 are moved synchronously by the driving cylinder 73 until the clamping plate 72 clamps both ends of the notebook shell. At this time, the pin 713 is inserted into the locking groove 715 under the elastic action of the return spring 714. The position between the moving part 711 and the pushing part 712 is unlocked. While the position of the clamping plate 72 remains unchanged (ensuring clamping), the pushing part 712 drives the extension part 74 to continue to move inward.

[0034] Reference Figure 7As shown, the laptop casing may deform during transport due to collisions or other reasons. This deformation can cause a misalignment between the predetermined and actual positions when cutting the waste material 53 on the casing, resulting in incomplete cutting. Therefore, this application uses a positioning detection device 8 to perform multi-point positioning of the laptop casing to confirm whether it is on the same plane, thereby detecting flatness. The structure of the positioning detection device 8 is as follows: the positioning detection device 8 includes a flatness detection component 81, which is elastically disposed on the connecting plate 521. An extrusion component 82, which cooperates with the flatness detection component 81, is horizontally slidably disposed in a horizontal groove opened in the fixed plate 523, and the distance between the extrusion component 82 and the horizontal groove is... The extrusion piece 82 is connected to the extrusion rod 83 at its lower end. The extrusion rod 83 is slidably disposed on the lower end face of the fixed plate 523. The inner arc-shaped surface of the extrusion rod 83 and the lower inclined surface of the extrusion block 62 are used for extrusion. A connecting pipe 84 is installed on the fixed plate 523. A sliding pipe 85 is slidably disposed on the upper end of the connecting pipe 84. A pressure block 86 is disposed on the side wall of the sliding pipe 85. An air suction head 87 is installed on the upper end of the sliding pipe 85. The lower end of the connecting pipe 84 is connected to an air pump 88. The air pump 88 is connected to the fixed plate 523 through an air pump seat. The inclined surface of the pressure block 86 is in contact with the ball bearing. The design of the ball bearing reduces the friction during extrusion. The ball bearing is rolled at the corner position of the extrusion piece 82.

[0035] Reference Figure 7 As shown, the flatness detection component 81 includes a movable rod 811, which is slidably disposed in the movable cavity opened in the connecting plate 521. A working spring is connected between the movable rod 811 and the movable cavity. A positioning component 812 is provided at the upper end of the movable rod 811, and a connecting rod 813 is installed at the lower end of the movable rod 811. An alignment groove 814 is opened in the middle of the connecting rod 813, and the alignment groove 814 corresponds to the position of the extension component 74.

[0036] During the actual testing process, the middle part of the laptop casing is placed on the support frame 524, and the two sides of the laptop casing are pressed on the positioning member 812. If the lower end face of the laptop casing is on the same plane, the downward pressure height of the positioning member 812 is the same, so that the extension member 74 moving inward can smoothly enter the alignment groove 814. At this time, the test is qualified. The extension member 74, which has entered the alignment groove 814, continues to move inward, thereby pushing the extrusion member 82 to move inward. The extrusion member 82 drives the extrusion rod 83 to extrude the extrusion block 62, causing the conveying frame 61 to rise. At the same time, the extrusion member 82 extrudes the pressure block 86, causing the air suction head 87 to press against the lower end face of the laptop casing. Subsequently, the air suction operation of the air pump 88 is used to perform air suction positioning of the laptop casing.

[0037] Working principle: Step 1: The laptop casing is transported by the conveyor 2, and the multi-degree-of-freedom robotic arm 3 moves the laptop casing onto the platform 52; Step 2: Clamp the two ends of the laptop shell using clamping device 7, and perform multi-point positioning on both ends of the laptop shell using positioning detection device 8 to detect the overall flatness of the laptop shell. After meeting the requirements, perform air suction positioning on the lower end of the laptop shell using positioning detection device 8. At the same time, the support device 6 is compressed and rises to provide intermittent support to the lower end of the laptop shell. Step 3: The waste material 53 remaining on the pouring gate of the notebook casing is laser-cut using the laser processing device 41. After cutting, the waste material 53 falls onto the placement table 52. Step 4: After cutting, the support device 6, clamping device 7, and positioning detection device 8 are reset, and the laptop shell is moved back to the conveying device 2 for transfer by the multi-degree-of-freedom robot arm 3.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A positioning fixture for laser processing of notebook computer casings, characterized in that, include: Base; The conveying device is installed on the rear left side of the base; A multi-degree-of-freedom robotic arm is mounted on the front right side of the base; The workbench is installed on the right rear side of the base, and a laser processing device is installed on the upper rear side of the workbench. The laser processing device is used to perform laser processing on the laptop shell. An electric drive slide rail is installed on the upper front side of the worktable. A sliding plate is slidably mounted on the electric drive slide rail, and the sliding plate is connected to the placement table through a support frame. The support device is slidably positioned in the middle of the placement platform. It provides intermittent support for the laptop casing and collects the waste material that falls off the laser cutting device in a partitioned manner. The clamping device is used to clamp and position the two ends of the notebook casing, and the clamping device is arranged symmetrically from left to right. The positioning detection device works in conjunction with the clamping device and the support device to detect the flatness of both ends of the notebook casing and perform air suction positioning.

2. The positioning fixture for laser processing of notebook housing according to claim 1, characterized in that: The placement platform includes a connecting plate, which is connected to a fixed plate via a longitudinal rod. The fixed plate is connected to the placement platform via a support frame, and a U-shaped support frame is provided in the middle of the connecting plate.

3. The positioning fixture for laser processing of notebook housing according to claim 2, characterized in that: The support device includes a conveying frame, with extrusion blocks symmetrically installed on the lower end of the conveying frame. The lower middle interface of the conveying frame is connected to a positive and negative pressure switching pneumatic system via a telescopic tube. The positive and negative pressure switching pneumatic system is installed on the lower end of the fixed plate. Support members are evenly installed on the upper end of the conveying frame. The support frame is located in the built-in groove of the connecting plate. The lower slope of the extrusion block gradually slopes downward from the outside to the inside.

4. A positioning fixture for laser processing of notebook housings according to claim 3, characterized in that: The support includes an extension tube, the lower end of which is connected to the conveying frame, and the upper end of which is connected to the outer side of the lower end of the support head via a pin. The support heads, which are symmetrically arranged on the left and right, are connected by a push-out spring.

5. A positioning fixture for laser processing of notebook housings according to claim 4, characterized in that: The upper inner side of the support head is an arc-shaped support surface, and the middle of the support head is provided with an internal cavity. A connecting net is movably arranged between the left and right internal cavities. The upper end of the internal groove is a flared structure, and an elastic buffer is provided on the upper inclined surface of the internal groove.

6. A positioning fixture for laser processing of notebook housings according to claim 3, characterized in that: The clamping device includes a movable component, which is slidably disposed in a sliding groove opened in the connecting plate. A clamping plate is installed at the upper end of the movable component, and a driving cylinder is connected between the movable component and the connecting plate. An extension is installed on the inner side of the lower end of the movable component.

7. A positioning fixture for laser processing of notebook housings according to claim 6, characterized in that: The movable component includes a movable part that is slidably disposed in a sliding groove. A through groove is provided in the movable part, and a pusher is horizontally slidably disposed in the through groove. A drive cylinder is connected between the outer side of the pusher and the connecting plate. An insert is installed at the inner end of the pusher. The position between the movable part and the pusher is temporarily locked by the longitudinal insertion of a pin. A return spring is connected between the pusher and the movable part.

8. A positioning fixture for laser processing of notebook housings according to claim 7, characterized in that: The pin is slidably disposed in the longitudinal groove at the lower end of the movable part, and the pin is elastically connected to the longitudinal groove. The upper half of the pin in the initial position is inserted into the snap-fit ​​groove at the lower end of the pusher. The locking groove corresponding to the position of the pin is located on one side of the fixed plate. The outer slope of the locking groove gradually slopes upward from the inside to the outside.

9. A positioning fixture for laser processing of notebook housings according to claim 7, characterized in that: The positioning detection device includes a flatness detection component, which is elastically set on the connecting plate. An extrusion component that works with the flatness detection component is horizontally slidably set in a horizontal groove in the fixed plate, and the extrusion component and the horizontal groove are elastically connected. The lower end of the extrusion component is connected to an extrusion rod, which is slidably set on the lower end face of the fixed plate. The inner arc-shaped surface of the extrusion rod and the lower inclined surface of the extrusion block are used for extrusion. A connecting pipe is installed on the fixed plate. A sliding pipe is slidably set on the upper end of the connecting pipe. A pressure block is set on the side wall of the sliding pipe. An air suction head is installed on the upper end of the sliding pipe. The lower end of the connecting pipe is connected to an air pump. The air pump is connected to the fixed plate through an air pump seat. The inclined surface of the pressure block is in contact with the ball bearing, which is rolled at the corner of the extrusion piece.

10. A positioning fixture for laser processing of notebook housings according to claim 9, characterized in that: The flatness testing component includes a movable rod, which is slidably disposed in the movable cavity opened in the connecting plate. A working spring is connected between the movable rod and the movable cavity. A positioning component is provided at the upper end of the movable rod, and a connecting rod is installed at the lower end of the movable rod. An alignment groove is opened in the middle of the connecting rod, and the alignment groove corresponds to the position of the insert.

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