Workpiece positioning equipment of three-dimensional laser cutting equipment

Abstract

The invention relates to the technical field of three-dimensional laser cutting equipment, and discloses three-dimensional laser cutting equipment workpiece positioning equipment which comprises a base plate, a guide rail, a sliding block and a supporting plate, the guide rail is fixedly connected with the upper surface of the base plate, the surface of the guide rail is in bolted connection with the sliding block, and the upper surface of the sliding block is fixedly connected with the supporting plate; a stepless adjusting device is arranged on the upper surface of the supporting plate, the stepless adjusting device comprises a driving ring, an adsorption device is arranged on the upper surface of the driving ring, and the adsorption device comprises a base. According to the workpiece fixing equipment, the adsorption device and the assisting device are arranged, so that the workpiece fixing equipment can fix a workpiece in a negative pressure mode, meanwhile, by means of the mechanical structure of the adsorption device, use of devices such as a sensor can be reduced, and the stability of the adsorption structure is guaranteed; therefore, the adsorption point positions only form negative pressure in the workpiece coverage area, and the fixing strength of the workpiece is improved.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional laser cutting equipment technology, specifically to a workpiece positioning device for three-dimensional laser cutting equipment. Background Technology

[0002] 3D laser cutting equipment is an industrial tool for high-precision cutting of complex curved surfaces and irregularly shaped workpieces. Through the collaboration of a 3D motion system and a high-power laser, it achieves moldless processing of non-planar workpieces. Its core consists of a high-power laser, a 3D CNC system, a high-precision motion platform, and an automatically focusing cutting head. The cutting head can dynamically adjust its posture according to the workpiece's curved surface, ensuring that the laser focus always remains aligned with the cutting surface. The equipment supports cutting various metal materials such as stainless steel, aluminum alloy, and titanium alloy, and can complete complex processes such as round hole, irregular hole, and contour cutting, producing smooth cuts and a small heat-affected zone, reducing subsequent grinding processes. Some models integrate a vision positioning system that can automatically identify and compensate for workpiece position deviations, adapting to workpiece placement errors in mass production; it can also be paired with loading and unloading robots to achieve automated assembly line operations, increasing cutting efficiency by 3-5 times compared to traditional machining. It is widely used in the automotive, aerospace, and rail transportation industries, and is a key piece of equipment driving improvements in the precision and efficiency of manufacturing highly complex parts.

[0003] Existing workpiece positioning devices in 3D laser cutting equipment mostly adopt a clamping design. When processing thin-walled or high-precision parts, such as aluminum alloy components with a thickness of 1-3mm, a high working force of 50-150N must be applied to the clamping structure to ensure that the workpiece does not shift during the cutting process. This force is concentrated in the clamping contact area, which is usually ≤2cm², and is prone to causing indentations on the workpiece surface with a depth of 0.1-0.3mm. It can also cause local deformation with a deflection of 0.2-0.5mm, and in severe cases, even cracks at the edges of thin-walled parts. Especially for aluminum alloy and magnesium alloy parts with low hardness, the clamping damage rate can reach 8%-15%. This design of "trading high clamping force for stability" essentially exposes the design contradiction between "stable clamping" and "workpiece protection" in clamping positioning devices. It not only directly causes parts to be scrapped, but also requires an additional surface repair process, which takes 5-10 minutes per piece, significantly restricting the processing yield and efficiency of 3D laser cutting. To address this, we propose a workpiece positioning device for 3D laser cutting equipment. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a workpiece positioning device for three-dimensional laser cutting equipment. This device resolves the design contradiction between "stable clamping" and "workpiece protection" in existing three-dimensional laser cutting workpiece positioning devices. This contradiction not only directly leads to part scrap but also requires an additional surface repair process, which takes 5-10 minutes per piece, significantly restricting the processing yield and efficiency of three-dimensional laser cutting.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a workpiece positioning device for a three-dimensional laser cutting equipment, comprising a base plate, a guide rail, a slider, and a support plate. The guide rail is fixedly connected to the upper surface of the base plate, a slider is bolted to the surface of the guide rail, a support plate is fixedly connected to the upper surface of the slider, and a stepless adjustment device is provided on the upper surface of the support plate. The stepless adjustment device includes a drive ring, and an adsorption device is provided on the upper surface of the drive ring.

[0008] The adsorption device includes a base mounted on the upper surface of a drive ring. An air cavity is formed on the upper surface of the base. A connector is fixedly connected to the base inside the air cavity. A housing is mounted on the upper surface of the base. A positioning bolt is inserted into the edge of the housing and threadedly connected to the inner wall of the base. A spring abuts against the upper surface of the base. A sealing plug is fixedly connected to the side of the spring away from the base. A top rod is fixedly connected to the upper surface of the sealing plug. A gasket is fixedly connected to the upper surface of the top rod. A support frame is fixedly connected to the inner wall of the housing. A filter cloth is fixedly connected to the upper surface of the support frame. A rubber ring is fixedly connected to the upper surface of the housing. A connection cavity is formed on the inner wall of the housing.

[0009] One side of the substrate is provided with an assisting device for helping the adsorption device to fix the workpiece.

[0010] Preferably, the upper surface of the base is provided with a groove, and a sealing ring is abutted against the inner wall of the groove. The sealing ring abuts against the lower surface of the outer shell. By using the sealing ring installed between the base and the outer shell, the connection between the two can be sealed to improve the sealing effect of the connection, reduce the probability of gas leakage at the connection, and ensure the stability of the air pressure when the outer shell is ventilated.

[0011] Preferably, the sealing plug is arranged in an isosceles trapezoidal shape, the sealing plug is slidably connected to the inner wall of the outer shell, the inclined surface of the sealing plug abuts against the inner wall of the outer shell, the arc surface of the sealing plug is provided with a protrusion, and the inner wall of the outer shell is provided with a constraint groove, the protrusion being slidably connected to the inner wall of the constraint groove; the sealing plug can be used to seal the inner cavity of the outer shell, thereby isolating the upper and lower parts of the outer shell and ensuring that the outer shell remains closed when the equipment is not in operation.

[0012] Preferably, the support frame is sleeved on the surface of the top rod, and the support frame is in communication with the interior of the outer shell; the support frame can support the position of the filter cloth, ensuring that the filter cloth can protect the air inlet of the outer shell and reduce the probability of debris entering the interior of the outer shell during the workpiece processing.

[0013] Preferably, the assisting device includes a vacuum pump, which is disposed on one side of the substrate. A guide tube is fixedly connected to the connector of the vacuum pump. A support frame is fixedly connected to the side surface of the substrate. A gas distributor is fixedly connected to the upper surface of the support frame. The guide tube is fixedly connected to the connector of the gas distributor. A connecting tube is fixedly connected to the interface of the gas distributor. A U-shaped frame is fixedly connected to the upper surface of the support plate. A telescopic hose is fixedly connected to the interface of the connecting tube. The telescopic hose is fixedly connected to the inner wall of the connector. The guide tube can connect the vacuum pump and the gas distributor, so that the cooperation of a single vacuum pump and the gas distributor can control the gas in multiple connecting tubes.

[0014] Preferably, the U-shaped frame is fixedly connected to the surface of the connecting pipe, and there are two U-shaped frames. The two U-shaped frames are horizontally distributed with the connecting pipe as a reference. The position of the connecting pipe can be fixed by the U-shaped frame to ensure the stability of the connecting pipe during use.

[0015] Preferably, the stepless adjustment device includes a positioning plate, which is mounted on the upper surface of a support plate. A fixing bolt is inserted into the inner wall of the positioning plate. A threaded groove is formed on the upper surface of the support plate. The fixing bolt is threadedly connected to the inner wall of the threaded groove. A rotating shaft is fixedly connected to the upper surface of the positioning plate. A driving ring is rotatably connected to the surface of the rotating shaft. A support column is fixedly connected to the upper surface of the driving ring. A guide block is fixedly connected to the upper surface of the support column. A guide cavity is formed on the lower surface of the base. The guide block is slidably connected to the inner wall of the guide cavity.

[0016] A base is fixedly connected to the upper surface of the support plate, and an adjuster is rotatably connected to the surface of the base. A locking bolt is threaded onto the inner wall of the adjuster. A protective cover is fixedly connected to the upper surface of the support plate, and a limit post is fixedly connected to the upper surface of the protective cover. A guide sleeve is slidably connected to the surface of the limit post, and the guide sleeve is fixedly connected to the arc surface of the base. By utilizing the cooperation between the drive ring and the support post, the guide block can be driven to move along the inside of the guide cavity during the user's rotation of the drive ring, thereby achieving the effect of lifting the base upward.

[0017] Preferably, the drive ring is movably abutted against the upper surface of the positioning disk, the support column is located inside the guide cavity, the upper inner wall of the guide cavity is inclined, and the upper surface of the support column is adapted to the guide cavity; by utilizing the cooperation between the positioning disk and the rotating shaft, the rotation direction of the drive ring can be guided to ensure that the drive ring rotates around a specified axis, thereby improving the stability of the drive ring in the rotation state.

[0018] Preferably, the drive ring has a toothed groove on its arc surface, and the adjuster has a protruding tooth fixedly provided on its arc surface. The protruding tooth meshes with the toothed groove. The protective cover is fitted onto the surface of the positioning plate, the drive ring, and the adjuster. The locking bolt is threaded to the inner wall of the base, and the adjuster has anti-slip texture on its surface. When the user tightens the locking bolt, it can lock the position of the adjuster in conjunction with the base, thus restricting the position of the drive ring.

[0019] In summary, the technical effects and advantages of this invention are as follows:

[0020] 1. In this invention, by setting up an adsorption device and an assisting device, the workpiece fixing equipment can fix the workpiece by a negative pressure method. At the same time, by utilizing the mechanical structure of the adsorption device, the use of sensors and other devices can be reduced, ensuring the stability of the adsorption structure. Furthermore, the setting of the adsorption device ensures that the adsorption point only forms negative pressure in the area covered by the workpiece, increasing the fixing strength of the workpiece.

[0021] 2. In this invention, by setting a stepless adjustment device, the height of the adsorption device can be adjusted according to the specifications of the workpiece, thereby improving the applicability of the adsorption device and further increasing its applicability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a workpiece positioning device for a three-dimensional laser cutting equipment according to the present invention;

[0023] Figure 2 This is a side view of a workpiece positioning device for a three-dimensional laser cutting equipment according to the present invention;

[0024] Figure 3 This is a front view of a workpiece positioning device for a three-dimensional laser cutting equipment according to the present invention;

[0025] Figure 4 This is a partial structural schematic diagram of a workpiece positioning device for a three-dimensional laser cutting equipment according to the present invention;

[0026] Figure 5 This is a schematic diagram of the adsorption device structure of a workpiece positioning device for a three-dimensional laser cutting equipment according to the present invention;

[0027] Figure 6 This invention relates to a workpiece positioning device for a three-dimensional laser cutting equipment. Figure 5 A front view structural diagram;

[0028] Figure 7 This is a schematic diagram of the stepless adjustment device of the workpiece positioning device in a three-dimensional laser cutting equipment according to the present invention;

[0029] Figure 8 This is a cross-sectional schematic diagram of the stepless adjustment device of the workpiece positioning device in a three-dimensional laser cutting equipment according to the present invention;

[0030] Figure 9 This is a partial structural schematic diagram of the stepless adjustment device of the workpiece positioning device in a three-dimensional laser cutting equipment according to the present invention;

[0031] Figure 10 This is a schematic diagram of the stepless adjustment device of the workpiece positioning equipment in a three-dimensional laser cutting device according to the present invention.

[0032] Figure 11 This is a schematic diagram of the assisting device structure of a workpiece positioning device for a three-dimensional laser cutting equipment according to the present invention.

[0033] In the diagram: 1. Base plate; 2. Guide rail; 3. Slider; 4. Support plate;

[0034] 5. Infinitely variable adjustment device; 51. Positioning plate; 52. Fixing bolt; 53. Rotating shaft; 54. Drive ring; 55. Support column; 56. Guide block; 57. Guide cavity; 58. Base; 59. Adjuster; 510. Locking bolt; 511. Protective cover; 512. Limiting column; 513. Guide sleeve;

[0035] 6. Adsorption device; 61. Base; 62. Air chamber; 63. Connector; 64. Groove; 65. Sealing ring; 66. Housing; 67. Positioning bolt; 68. Spring; 69. Sealing plug; 610. Top rod; 611. Gasket; 612. Support frame; 613. Filter cloth; 614. Rubber ring; 615. Constraint groove; 616. Connecting cavity;

[0036] 7. Assisting device; 71. Vacuum pump; 72. Guide tube; 73. Support frame; 74. Gas distributor; 75. Connecting pipe; 76. U-shaped frame; 77. Telescopic hose. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] refer to Figures 1-11 The workpiece positioning device of a three-dimensional laser cutting equipment shown includes a base plate 1, a guide rail 2, a slider 3 and a support plate 4. The guide rail 2 is fixedly connected to the upper surface of the base plate 1. The slider 3 is bolted to the surface of the guide rail 2. The support plate 4 is fixedly connected to the upper surface of the slider 3. The upper surface of the support plate 4 is provided with a stepless adjustment device 5. The stepless adjustment device 5 includes a drive ring 54. The upper surface of the drive ring 54 is provided with an adsorption device 6.

[0039] The adsorption device 6 includes a base 61, which is mounted on the upper surface of the drive ring 54. An air cavity 62 is formed on the upper surface of the base 61. A connector 63 is fixedly connected to the base 61 inside the air cavity 62. A housing 66 is mounted on the upper surface of the base 61. A positioning bolt 67 is inserted into the edge of the housing 66 and is threaded to the inner wall of the base 61. A spring 68 abuts against the upper surface of the base 61. A sealing plug 69 is fixedly connected to the side of the spring 68 away from the base 61. A top rod 610 is fixedly connected to the upper surface of the sealing plug 69. A gasket 611 is fixedly connected to the upper surface of the top rod 610. A support frame 612 is fixedly connected to the inner wall of the housing 66. A filter cloth 613 is fixedly connected to the upper surface of the support frame 612. A rubber ring 614 is fixedly connected to the upper surface of the housing 66. A connection cavity 616 is formed on the inner wall of the housing 66.

[0040] An assisting device 7 is provided on one side of the substrate 1 to assist the adsorption device 6 in fixing the workpiece.

[0041] The base 61 has a groove 64 on its upper surface. A sealing ring 65 is abutted against the inner wall of the base 61 in the groove 64. The sealing ring 65 abuts against the lower surface of the outer shell 66. The sealing ring 65 installed between the base 61 and the outer shell 66 can seal the connection between the two, thereby improving the sealing effect of the connection, reducing the probability of gas leakage at the connection, and ensuring the stability of the air pressure when the outer shell 66 is ventilated.

[0042] The sealing plug 69 is arranged in an isosceles trapezoidal shape and is slidably connected to the inner wall of the outer shell 66. The inclined surface of the sealing plug 69 abuts against the inner wall of the outer shell 66, and the arc surface of the sealing plug 69 is provided with a protrusion. The inner wall of the outer shell 66 is provided with a constraint groove 615, and the protrusion is slidably connected to the inner wall of the constraint groove 615. The sealing plug 69 can be used to seal the inner cavity of the outer shell 66, thereby isolating the upper and lower parts of the outer shell 66 and ensuring that the outer shell 66 remains closed when the equipment is not in operation.

[0043] The support frame 612 is sleeved on the surface of the top rod 610 and is connected to the interior of the outer shell 66. The support frame 612 can support the position of the filter cloth 613, ensuring that the filter cloth 613 can protect the air inlet of the outer shell 66 and reduce the probability of debris entering the interior of the outer shell 66 during the workpiece processing.

[0044] The assisting device 7 includes a vacuum pump 71, which is disposed on one side of the substrate 1. A guide tube 72 is fixedly connected to the connector of the vacuum pump 71. A support frame 73 is fixedly connected to the side surface of the substrate 1. A gas distributor 74 is fixedly connected to the upper surface of the support frame 73. The connector of the guide tube 72 and the gas distributor 74 are fixedly connected. A connecting tube 75 is fixedly connected to the interface of the gas distributor 74. A U-shaped frame 76 is fixedly connected to the upper surface of the support plate 4. A telescopic hose 77 is fixedly connected to the interface of the connecting tube 75. The telescopic hose 77 is fixedly connected to the inner wall of the connector 63. The vacuum pump 71 and the gas distributor 74 can be connected by the guide tube 72, so that the cooperation of a single vacuum pump 71 and the gas distributor 74 can control the gas in multiple connecting tubes 75.

[0045] The U-shaped frame 76 is fixedly connected to the surface of the connecting pipe 75. There are two U-shaped frames 76, which are horizontally distributed with reference to the connecting pipe 75. The U-shaped frames 76 can be used to fix the position of the connecting pipe 75 to ensure the stability of the connecting pipe 75 during use.

[0046] The stepless adjustment device 5 includes a positioning disk 51, which is installed on the upper surface of the support plate 4. A fixing bolt 52 is inserted into the inner wall of the positioning disk 51. A threaded groove is opened on the upper surface of the support plate 4. The fixing bolt 52 is threadedly connected to the inner wall of the threaded groove. A rotating shaft 53 is fixedly connected to the upper surface of the positioning disk 51. A driving ring 54 is rotatably connected to the surface of the rotating shaft 53. A support column 55 is fixedly connected to the upper surface of the driving ring 54. A guide block 56 is fixedly connected to the upper surface of the support column 55. A guide cavity 57 is opened on the lower surface of the base 61. The guide block 56 is slidably connected to the inner wall of the guide cavity 57.

[0047] A base 58 is fixedly connected to the upper surface of the support plate 4. An adjuster 59 is rotatably connected to the surface of the base 58. A locking bolt 510 is threadedly connected to the inner wall of the adjuster 59. A protective cover 511 is fixedly connected to the upper surface of the support plate 4. A limit post 512 is fixedly connected to the upper surface of the protective cover 511. A guide sleeve 513 is slidably connected to the surface of the limit post 512. The guide sleeve 513 is fixedly connected to the arc surface of the base 61. By utilizing the cooperation between the drive ring 54 and the support post 55, the guide block 56 can be driven to move along the inside of the guide cavity 57 during the user's rotation of the drive ring 54, thereby achieving the effect of lifting the base 61 upward.

[0048] The drive ring 54 is in movable contact with the upper surface of the positioning disk 51, the support column 55 is located inside the guide cavity 57, the upper inner wall of the guide cavity 57 is inclined, and the upper surface of the support column 55 is adapted to the guide cavity 57. By utilizing the cooperation between the positioning disk 51 and the rotating shaft 53, the rotation direction of the drive ring 54 can be guided to ensure that the drive ring 54 rotates around the specified axis, thereby improving the stability of the drive ring 54 in the rotation state.

[0049] The drive ring 54 has a toothed groove on its arc surface, and the adjuster 59 has a toothed protrusion fixed on its arc surface. The toothed protrusion meshes with the toothed groove. The protective cover 511 is fitted on the surface of the positioning plate 51, the drive ring 54, and the adjuster 59. The locking bolt 510 is threaded to the inner wall of the base 58. The surface of the adjuster 59 is provided with anti-slip texture. When the user tightens the locking bolt 510, it can lock the position of the adjuster 59 in conjunction with the base 58, thus restricting the position of the drive ring 54.

[0050] The working principle of this invention is as follows: When the device is used to fix the flat workpiece to be processed, the mechanical gripper located on the side of the device places the flat workpiece on the device. During the placement of the workpiece, the workpiece contacts the surface of the pad 611 within its specification range. At this time, the robot continues to place the workpiece downward. The force generated by the workpiece and the robot is applied to the pad 611. The pad 611 is pushed downward by the force to push the push rod 610. The push rod 610 is pushed by the force to push the sealing plug 69. The sealing plug 69 compresses the spring 68. The spring 68 is compressed and deformed. The sealing plug 69 loses the constraint of the spring 68 and moves along the specified direction under the guidance of the protrusion and the constraint groove 615. When the sealing plug 69 moves to the bottom of its movement range, the workpiece contacts the surface of the rubber ring 614. At the same time, the position of the sealing plug 69 is located in the middle area of ​​the connecting cavity 616. At this time, the connecting cavity 616 connects the upper cavity and the lower cavity of the outer shell 66.

[0051] When the upper and lower chambers of the outer casing 66 are connected, the vacuum pump 71 operates. The vacuum pump 71, in conjunction with the guide pipe 72 and the air distributor 74, extracts air from the connecting pipe 75. While the connecting pipe 75 is being evacuated, it, in conjunction with the telescopic hose 77, connector 63, and air chamber 62, extracts air from inside the outer casing 66. During the air extraction process, a negative pressure is generated inside the outer casing 66, which, in conjunction with the rubber ring 614, adsorbs the workpiece located above it. At this time, the adsorption device 6 within the workpiece area can fix the workpiece. By setting the adsorption device 6 and the assisting device 7, the workpiece fixing equipment can use a negative pressure method to fix the workpiece. At the same time, by utilizing the mechanical structure of the adsorption device 6, the use of sensors and other devices can be reduced, ensuring the stability of the adsorption structure. Furthermore, the setting of the adsorption device 6 ensures that the adsorption point only forms a negative pressure in the area covered by the workpiece, increasing the fixing strength of the workpiece.

[0052] Additionally, when the user needs to adjust the height of the adsorption device 6 at different locations, loosen the locking bolt 510. After the locking bolt 510 is loosened, rotate the adjuster 59. The adjuster 59 engages with the drive ring 54. Under the action of the adjuster 59, the drive ring 54 rotates along the guide direction of the rotating shaft 53. During the rotation, the drive ring 54 rotates the support column 55. The support column 55 moves the guide block 56 synchronously. At this time, the support column 55 and the guide block 56 move along the specified direction under the guidance of the guide cavity 57, and push the base 61 upward during the movement. Under the guidance of the guide sleeve 513 and the limiting post 512, the base 61 moves along the specified direction, so that the adsorption device 6 moves upward.

[0053] When the adsorption device 6 is adjusted to a height suitable for the workpiece specifications, stop rotating the adjuster 59. At the same time, keep the adjuster 59 in a non-rotating state and retighten the locking bolt 510. After the locking bolt 510 is retightened, it can be used with the base 58 to lock the position of the adjuster 59. In the locked state, the adjuster 59, in conjunction with the drive ring 54, restricts the position of the support column 55 and the guide block 56. At this time, the support column 55 and the guide block 56 are limited to the designated position, and in conjunction with the limit post 512 and the guide sleeve 513, the position of the base 61 is locked, thus completing the height adjustment operation of the adsorption device 6. By setting the stepless adjustment device 5, the height of the adsorption device 6 can be adjusted according to the specifications of the workpiece, thereby improving the applicability of the adsorption device 6 and further increasing its applicability.

[0054] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A workpiece positioning device for a three-dimensional laser cutting equipment, comprising a base plate (1), a guide rail (2), a slider (3), and a support plate (4), characterized in that: The guide rail (2) is fixedly connected to the upper surface of the substrate (1). A slider (3) is bolted to the surface of the guide rail (2). A support plate (4) is fixedly connected to the upper surface of the slider (3). A stepless adjustment device (5) is provided on the upper surface of the support plate (4). The stepless adjustment device (5) includes a drive ring (54). An adsorption device (6) is provided on the upper surface of the drive ring (54). The adsorption device (6) includes a base (61) mounted on the upper surface of a drive ring (54). An air cavity (62) is formed on the upper surface of the base (61). A connector (63) is fixedly connected to the base (61) inside the air cavity (62). A housing (66) is mounted on the upper surface of the base (61). A positioning bolt (67) is inserted into the edge of the housing (66). The positioning bolt (67) is threadedly connected to the inner wall of the base (61). A spring (68) abuts against the upper surface of the base (61). A sealing plug (69) is fixedly connected to the side of the spring (68) away from the base (61). A top rod (610) is fixedly connected to the upper surface of the sealing plug (69). A gasket (611) is fixedly connected to the upper surface of the top rod (610). A support frame (612) is fixedly connected to the inner wall of the outer shell (66). A filter cloth (613) is fixedly connected to the upper surface of the support frame (612). A rubber ring (614) is fixedly connected to the upper surface of the outer shell (66). A connecting cavity (616) is opened in the inner wall of the outer shell (66). One side of the substrate (1) is provided with an assisting device (7) for assisting the adsorption device (6) in fixing the workpiece.

2. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 1, characterized in that: The upper surface of the base (61) is provided with a groove (64), and the inner wall of the base (61) in the groove (64) is abutted by a sealing ring (65), and the sealing ring (65) abuts against the lower surface of the outer shell (66).

3. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 1, characterized in that: The sealing plug (69) is arranged in an isosceles trapezoidal shape. The sealing plug (69) is slidably connected to the inner wall of the outer shell (66). The inclined surface of the sealing plug (69) abuts against the inner wall of the outer shell (66). The arc surface of the sealing plug (69) is provided with a protrusion. The inner wall of the outer shell (66) is provided with a constraint groove (615). The protrusion is slidably connected to the inner wall of the constraint groove (615).

4. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 1, characterized in that: The support frame (612) is sleeved on the surface of the top rod (610), and the support frame (612) is in communication with the interior of the outer shell (66).

5. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 1, characterized in that: The assisting device (7) includes a vacuum pump (71), which is disposed on one side of the substrate (1). A guide tube (72) is fixedly connected to the connector of the vacuum pump (71). A support frame (73) is fixedly connected to the side surface of the substrate (1). A gas distribution manifold (74) is fixedly connected to the upper surface of the support frame (73). The guide tube (72) is fixedly connected to the connector of the gas distribution manifold (74). A connecting tube (75) is fixedly connected to the interface of the gas distribution manifold (74). A U-shaped frame (76) is fixedly connected to the upper surface of the support plate (4). A telescopic hose (77) is fixedly connected to the interface of the connecting tube (75). The telescopic hose (77) is fixedly connected to the inner wall of the connector (63).

6. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 1, characterized in that: The U-shaped frame (76) is fixedly connected to the surface of the connecting pipe (75). There are two U-shaped frames (76), and the two U-shaped frames (76) are horizontally distributed with reference to the connecting pipe (75).

7. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 1, characterized in that: The stepless adjustment device (5) includes a positioning disk (51), which is installed on the upper surface of the support plate (4). A fixing bolt (52) is inserted into the inner wall of the positioning disk (51). A threaded groove is opened on the upper surface of the support plate (4). The fixing bolt (52) is threadedly connected to the inner wall of the threaded groove. A rotating shaft (53) is fixedly connected to the upper surface of the positioning disk (51). A driving ring (54) is rotatably connected to the surface of the rotating shaft (53). A support column (55) is fixedly connected to the upper surface of the driving ring (54). A guide block (56) is fixedly connected to the upper surface of the support column (55). A guide cavity (57) is opened on the lower surface of the base (61). The guide block (56) is slidably connected to the inner wall of the guide cavity (57). A base (58) is fixedly connected to the upper surface of the support plate (4). An adjuster (59) is rotatably connected to the surface of the base (58). A locking bolt (510) is threadedly connected to the inner wall of the adjuster (59). A protective cover (511) is fixedly connected to the upper surface of the support plate (4). A limit post (512) is fixedly connected to the upper surface of the protective cover (511). A guide sleeve (513) is slidably connected to the surface of the limit post (512). The guide sleeve (513) is fixedly connected to the arc surface of the base (61).

8. The workpiece positioning device for a three-dimensional laser cutting equipment according to claim 7, characterized in that: The drive ring (54) is in movable contact with the upper surface of the positioning disk (51), the support column (55) is located inside the guide cavity (57), the upper inner wall of the guide cavity (57) is inclined, and the upper surface of the support column (55) is adapted to the guide cavity (57).

9. A workpiece positioning device for a three-dimensional laser cutting equipment according to claim 7, characterized in that: The drive ring (54) has a toothed groove on its arc surface, and the adjuster (59) has a toothed protrusion fixed on its arc surface. The toothed protrusion meshes with the toothed groove. The protective cover (511) is fitted on the surface of the positioning plate (51), the protective cover (511) is fitted on the surface of the drive ring (54), the protective cover (511) is fitted on the surface of the adjuster (59), the locking bolt (510) is threaded to the inner wall of the base (58), and the surface of the adjuster (59) is provided with anti-slip texture.

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