A workbench assembly with positioning function for laser cutting machine

Abstract

The utility model relates to laser cutting equipment technical field discloses a worktable assembly with positioning function for laser cutting machine, including fuselage, the parallel interval of fuselage is provided with the worktable of one for the alternate movement between the processing position or loading position of fuselage, be provided with positioning device between fuselage and worktable, positioning device includes the lifting mechanism of opposite fuselage guide and lift setting, respectively set up in two worktables and when worktable is located the connecting assembly of processing position and with lifting mechanism butt joint, the spacing structure that lifting mechanism and connecting assembly form when any connecting assembly and lifting mechanism butt joint and when lifting mechanism rises or falls and limit this connecting assembly to separate from lifting mechanism, this worktable assembly only needs to realize the lifting action of lifting mechanism through a group of driving devices to can realize the spacing of any connecting assembly, need not to set up multiple sets of driving devices and limit the activity of worktable respectively, can effectively reduce the production cost and assembly cost of laser cutting machine.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting equipment technology, and in particular to a worktable assembly for a laser cutting machine with positioning function. Background Technology

[0002] An interchangeable worktable refers to the simultaneous installation of two worktables on a mechanical device (in this solution, mainly referring to a laser planar cutting machine). These two worktables can alternately move to the processing position and the loading / unloading position via a drive mechanism, achieving uninterrupted work and improving efficiency. This drive mechanism is usually a chain drive mechanism, with the chain divided into upper and lower layers. The worktables are connected to the sleeves of one or more links of one layer of the chain via shaft-like parts. However, the process of picking up and placing the sheet metal during loading inevitably causes vibration of the worktable, and may even cause slight movement. This effect is transmitted to the worktable during processing through the chain, causing the sheet metal to deviate from the laser cutting path and increasing the defect rate of parts.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN212239656U discloses an exchangeable worktable for a laser cutting machine. This worktable includes a frame with a pair of parallel worktables slidably mounted on it. When one worktable is in the processing position on the frame, the other worktable is in the loading position. A positioning mechanism is provided between the frame and the worktables to fix them in place when the worktables move to the processing position. The positioning mechanism includes a positioning block fixedly mounted on the side of the worktable facing the processing position. A mounting base is fixed on the frame, and two sets of cylinders are vertically spaced on the mounting base. Positioning rods are mounted on the extension and retraction ends of the cylinders. Positioning grooves are formed on the positioning blocks. When the worktable moves to the processing position, the positioning rods align with the positioning grooves on the positioning blocks. At this time, the cylinders extend, causing the ends of the positioning rods to abut against the positioning grooves, thereby restricting the movement of the worktable.

[0004] The aforementioned laser cutting machine exchange worktable is equipped with two sets of cylinders, positioning blocks, and positioning rods to limit the movement of each worktable. In actual production, to achieve the movement of the cylinders, the cylinders themselves need to be connected to an air source, pneumatic control components, sensors, and a control system. The control system also needs to be connected to a power source through a control circuit. Setting up two sets of cylinders means that the aforementioned supporting components also need to be set up in two sets, resulting in high production costs and difficult assembly. Therefore, there is still room for improvement in the positioning device on the existing laser cutting machine exchange worktable. Utility Model Content

[0005] To address the shortcomings of existing laser cutting machine exchange worktable positioning devices, which require two sets of cylinders to limit the movement of the two worktables, resulting in high production costs and difficult assembly, the purpose of this invention is to provide a laser cutting machine worktable assembly with positioning function. The positioning device in this worktable assembly has lower production costs and is easier to assemble.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] A laser cutting machine worktable assembly with positioning function includes a machine body, on which a worktable is arranged parallel to each other, alternating between a processing position or a loading position of the machine body. A positioning device is provided between the machine body and the worktable. The positioning device includes a lifting mechanism that is guided and lifted relative to the machine body, and a connecting component that is respectively set on the two worktables and docks with the lifting mechanism when the worktable is in the processing position. A limiting structure is formed between the lifting mechanism and the connecting component, which restricts the connecting component from disengaging from the lifting mechanism when either connecting component docks with the lifting mechanism and when the lifting mechanism rises or falls.

[0008] Using the above solution, the lifting mechanism can dock with the connecting components on any workbench. When limiting the position, only one set of drive devices is needed to control the movement of the lifting mechanism to limit the connecting components on any workbench, which simplifies the structure of the laser cutting machine and reduces production costs and assembly difficulty.

[0009] Preferably, the lifting mechanism includes a first profile tube arranged vertically relative to the machine body, a second profile tube that slides along the inner wall of the first profile tube, a drive assembly for driving the second profile tube to rise and fall, and a limiting assembly located between the first profile tube and the second profile tube for limiting the lifting stroke of the second profile tube.

[0010] Using the above scheme, the main body of the lifting mechanism is formed by the interlocking of the first profile tube and the second profile tube. Only two sizes of profile tubes need to be prepared and cut into several sections respectively. Its advantage is that the profile tubes are inexpensive.

[0011] Preferably, the connecting assembly includes a pull rod protruding from the worktable, and a through hole for the pull rod to partially extend into the second profile tube. The limiting structure includes a limiting annular groove opened near the end of the pull rod and a limiting slide groove communicating with the through hole and for the limiting annular groove to engage when the second profile tube is raised or lowered. The inner diameter of the through hole is larger than the outer diameter of the pull rod, and the width of the limiting annular groove is clearance-fitted with the wall thickness of the second profile tube. Two sets of through holes and limiting slide grooves are arranged vertically along the second profile tube at intervals, and the distance between them is equal to the height difference between the two pull rods.

[0012] Using the above scheme, when the worktable moves to the processing position, the end of the pull rod will partially extend into the through hole. At this time, the drive component is activated, driving the second profile tube to move up or down, so that the limiting ring groove on the pull rod is locked into the limiting slide groove and cannot be removed. In this scheme, the width of the limiting ring groove and the wall thickness of the second profile tube are clearance fit. This fit supports the two to form a sliding fit while minimizing the amplitude of movement when the two form a limit. After assembly, the actual position of the laser cutting machine's worktable should remain unchanged each time it moves to the processing position so that the second profile tube and the pull rod can cooperate smoothly. The limiting structure in this scheme can be achieved by drilling holes in the upper side wall of the second profile tube, which is relatively easy to process and easy to produce.

[0013] Preferably, the two ends of the limiting annular groove are formed with an inlet structure to guide the pipe wall of the second profile tube into place. The inlet structure includes a conical surface formed at both ends of the limiting annular groove, and the angle between the conical surface and the end face of the limiting annular groove is in the range of 150° to 170°.

[0014] Using the above scheme, the actual position of the worktable may deviate slightly each time it moves to the processing position. In this scheme, when the second profile tube limits the pull rod, it can be guided into the limiting ring groove by the conical surface. During this process, the worktable may experience a slight lateral movement, but this movement occurs before processing and will not affect subsequent processing.

[0015] Preferably, both the first and second profile tubes are square tubes, with through holes and limiting grooves extending through both sides of the second profile tube.

[0016] Using the above scheme, the sidewall of the square tube is flat, which is beneficial for the processing of through holes and limiting structures. The hardness of the tie rod in this scheme needs to be greater than that of the profile tube, and the through holes and limiting structures penetrate through the second profile tube. In this way, the tie rod wears slower than the profile tube. When the wall thickness of the working side of the second profile tube wears, the operator can remove the second profile tube, turn the other side to face the tie rod, and reinstall it into the first profile tube for reuse, thereby saving maintenance costs.

[0017] Preferably, the driving assembly includes an elastic element for driving the second profile tube upward and an electromagnet for driving the second profile tube downward. The electromagnet is fixedly disposed relative to the first profile tube, and an iron block that can be attracted by the electromagnet is disposed inside the second profile tube.

[0018] Preferably, the limiting component includes a limiting screw that passes through both the first profile tube and the second profile tube, and the second profile tube has a waist-shaped groove vertically provided for the limiting screw to pass through.

[0019] Using the above scheme, when the second profile tube is driven to rise by the elastic element, the limiting screw will abut against one end of the waist-shaped hole to form a limit, preventing the second profile tube from continuing to rise; when the electromagnet is energized and attracts the iron block, the second profile tube descends. At this time, there is a gap between the limiting screw and the end of the waist-shaped groove, and there is also a gap between the bottom of the second profile tube and the base. The purpose is to ensure that the iron block and the electromagnet can fit together fully so that the magnetic attraction force reaches the maximum.

[0020] Preferably, the machine body is provided with a guide mechanism for the lifting assembly to move closer to or further away from the processing position, and an adjustment mechanism for adjusting and locking the distance between the lifting structure and the processing position.

[0021] If the first profile tube is directly fixed to the machine body and the pull rod is fixed to the worktable using the above solution, then the installation position of the first profile tube must be within the travel range of the worktable to ensure that the pull rod can fully extend into the through hole when the worktable moves to the work position. However, this solution uses an adjustment component to enable the lifting mechanism to move and lock relative to the worktable. During assembly, it is only necessary to adjust the lifting mechanism to maintain a suitable distance from the worktable according to the position of the pull rod to achieve the fit, which can effectively reduce the assembly accuracy between the components and thus reduce the processing difficulty.

[0022] Preferably, the guiding mechanism includes a guide rail horizontally arranged on the machine body along the direction of movement of the worktable and a slider arranged on the guide rail. A base connected to the adjustment mechanism is fixed on the slider, and the lifting mechanism is fixedly arranged on the base.

[0023] Preferably, the adjustment mechanism includes a base fixedly mounted on the machine body, an adjustment bolt with a central hole and horizontally screwed onto the base, and a locking bolt that passes through the central hole and is screwed onto the base. When the locking bolt is tightened, its large end abuts against the end face of the adjustment bolt. When the locking bolt is not tightened, the adjustment bolt can continuously screw into the base to abut against the base and push the base towards the processing position, or continuously screw out of the base to abut against the large end of the locking bolt and pull the base away from the processing position.

[0024] Using the above scheme, when the locking bolt is tightened, the adjusting bolt abuts against the base, and the large end of the locking bolt abuts against the adjusting bolt, thereby restricting the rotation of the adjusting bolt and fixing the base in the current position; when the locking bolt is loosened, the adjusting bolt can screw itself into the base, abut against the base, and push it towards the processing position. When it is screwed out of the base, it abuts against the large end of the locking bolt, and the connection between the locking bolt and the base pulls the base away from the processing position, thereby realizing the position adjustment of the lifting mechanism.

[0025] This utility model has significant technical effects due to the adoption of the above technical solutions: the lifting mechanism in this solution can dock with the connecting components on any workbench. When limiting, only one set of drive devices is needed to control the movement of the lifting mechanism to limit the connecting components on any workbench, which simplifies the structure of the laser cutting machine and reduces production costs and assembly difficulty. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the external structure of a worktable assembly for a laser cutting machine with positioning function according to this embodiment;

[0027] Figure 2 yes Figure 1 A magnified view of a portion of A in the image;

[0028] Figure 3 yes Figure 2 A diagram illustrating the split state;

[0029] Figure 4 This is a schematic diagram of the disassembled structure of a worktable assembly for a laser cutting machine with positioning function according to this embodiment;

[0030] Figure 5 yes Figure 4 A magnified view of the portion related to B in the image;

[0031] Figure 6 This is a top view of a laser cutting machine worktable assembly with positioning function according to this embodiment;

[0032] Figure 7 yes Figure 6 A sectional view of CC in the middle;

[0033] Figure 8 yes Figure 7 A magnified view of a portion of D in the image;

[0034] Figure 9 yes Figure 8 A magnified view of a portion of D1 in the image;

[0035] Figure 10 yes Figure 8 A magnified view of a portion of D2.

[0036] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Machine body; 2. Worktable; 3. Chain drive mechanism; 4. First profile tube; 5. Second profile tube; 501. Through hole; 502. Limiting slide groove; 503. Waist-shaped hole; 6. Tie rod; 601. Limiting ring groove; 602. Conical surface; 603. Operating surface; 7. Elastic element; 8. Electromagnet; 9. Iron block; 10. Pad; 11. Limiting bolt; 1101. Nut; 12. Guide rail; 1201. Slider; 13. Base; 1301. Placement groove; 14. Base; 1401. Threaded hole; 15. Adjusting bolt; 1501. Center hole; 16. Locking bolt; 17. Internal threaded bushing; 18. Flat washer. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0038] Example

[0039] A worktable assembly for a laser cutting machine with positioning function, according to Figure 1 , 4 As shown, the machine includes a body 1, on which a pair of horizontally distributed worktables 2 are arranged in parallel at intervals. A chain drive mechanism 3 is provided between the body 1 and the worktables 2. The chain drive mechanism 3 can drive the worktables 2 to move alternately between the processing position and the loading position of the body 1. The above structure is the prior art and does not involve the improvement points of this embodiment, so it will not be described in detail in this embodiment.

[0040] The improvement in this embodiment is that a positioning device is provided between the machine body 1 and the worktable 2 to restrict the movement of the worktable 2 when the laser cutting machine is working. The positioning device includes a base 13 disposed on the machine body 1, and a lifting mechanism is provided on the base 13. Figure 2 , 3 As shown, the lifting mechanism includes a first profile tube 4 vertically arranged on the base 13, and a second profile tube 5 disposed inside the first profile tube 4 and guided to slide along its inner wall. In this embodiment, both the first profile tube 4 and the second profile tube 5 are square tubes. The first profile tube 4 is welded and fixed to the base 13, and the sliding movement of the second profile tube 5 is controlled by a drive assembly. Figure 8 As shown, the driving assembly includes an elastic element 7 for driving the second profile tube 5 upward and an electromagnet 8 for driving the second profile tube 5 downward. An iron block 9 that can be attracted by the electromagnet 8 is provided inside the second profile tube 5. In this embodiment, the elastic element 7 is a spring. A pad 10 is welded and fixed inside the second profile tube 5 near the bottom end. The spring is disposed between the pad 10 and the base 13. The base 13 has a placement groove 1301 for partially inserting the spring. The electromagnet 8 is embedded in the base 13. The iron block 9 is integrally disposed with the pad 10.

[0041] The positioning device also includes a connecting component, according to Figure 2 , 3 As shown, the connecting assembly includes pull rods 6 respectively provided on the side of the two worktables 2 facing the processing position. When the worktable 2 moves to the processing position, the pull rods 6 are connected to the second profile tube 5. In this embodiment, the outer frame of the worktable 2 is a profile, and an internal threaded bushing 17 is interference-fitted inside the outer frame of the worktable 2. The pull rods 6 are screwed and fixed to the internal threaded bushing 17. An operating surface 603 for tightening with a tool is formed on the outer wall of the pull rods 6. A flat washer 18 is provided between the pull rods 6 and the internal threaded bushing 17.

[0042] A limit structure is provided between the lifting mechanism and the connecting components, according to... Figure 3 , 8 As shown in Figures 9 and 1, in this embodiment, a through hole 501 is provided on the side wall of the second profile tube 5 for the pull rod 6 to partially extend into. The limiting structure includes a limiting annular groove 601 provided on the outer wall of the pull rod 6 near the end extending into the through hole 501, and a limiting sliding groove 502 provided on the side wall of the second profile tube 5 communicating with the through hole 501. Two sets of through holes 501 and limiting sliding grooves 502 are arranged vertically along the second profile tube 5, with the spacing equal to the height difference between the two pull rods 6. Each set of through holes 501 and limiting sliding grooves 502 corresponds to one pull rod 6. When the pull rod 6 is located in the through hole 501, the second profile tube 5 descends, causing the limiting sliding groove 502 to engage with the limiting annular groove 601. In this embodiment, the diameter of the through hole 501 is 3-5 mm larger than the outer diameter of the pull rod 6, and the width of the limiting sliding groove 502 is larger than the outer diameter of the pull rod 6 when it is located in the through hole 501. The outer diameter of the retaining ring groove 601 is 0.5mm larger. This design aims to allow for a certain deviation in the assembly of the through hole 501 and the pull rod 6 without affecting their fit. The through hole 501 and the limiting slide groove 502 penetrate both sides of the second profile tube 5. The retaining ring groove 601 and the tube wall of the second profile tube 5 are in clearance fit. The tube wall thickness of the second profile tube 5 is 8mm. The maximum deviation between the width of the retaining ring groove 601 and the tube wall thickness of the second profile tube 5 is 0.1mm. At both ends of the retaining ring groove 601, there are conical surfaces 602 that assist the tube wall of the second profile tube 5 in sliding and engaging with the retaining ring groove 601 when the retaining ring groove 601 and the limiting slide groove 502 are engaged. The included angle between the conical surface 602 and the end face of the retaining ring groove 601 is in the range of 150° to 170°. In this embodiment, the included angle is approximately 160°.

[0043] A limiting component is provided between the first profile tube 4 and the second profile tube 5 to limit the lifting stroke of the second profile tube 5. Figure 2 , 3As shown in Figure 5, the limiting component includes a limiting bolt 11 that passes through both the first profile tube 4 and the second profile tube 5. The second profile tube 5 has a waist-shaped hole 503 vertically provided for the limiting bolt 11 to pass through. When the second profile tube 5 rises or falls, the waist-shaped hole 503 slides relative to the limiting bolt 11. In this embodiment, after the limiting bolt 11 passes through the first profile tube 4, it cooperates with a nut 1101 to lock it onto the first profile tube 4.

[0044] Referring to the above structure, combined with Figures 1-9 As can be seen, the working process of the positioning device in the worktable assembly of a laser cutting machine with positioning function in this embodiment is as follows:

[0045] Driven by the chain drive mechanism 3, the two worktables 2 move alternately and in opposite directions. When one of the worktables 2 moves to the processing position, the end of the pull rod 6 partially extends into the through hole 501. At this time, the electromagnet 8 is energized, and the magnetic attraction force generated by the electromagnet 8 drives the second profile tube 5 to move downward, so that the through hole 501 and the pull rod 6 are misaligned. The limiting slide groove 502 and the limiting ring groove 601 are engaged, preventing the pull rod 6 from exiting the second profile tube 5, thereby limiting the worktable 2.

[0046] After the laser cutting machine finishes processing, the electromagnet 8 is de-energized, and the spring drives the second profile tube 5 to rise. At this time, the pull rod 6 is aligned with the through hole 501 again. The worktable 2 moves backward to make the pull rod 6 exit the second profile tube 5. When the worktable 2 moves to the loading position, the other worktable 2 will dock with the second profile tube 5 again.

[0047] The lifting mechanism in this embodiment can dock with the connecting components on any workbench 2. When limiting the position, only one set of drive devices is needed to control the movement of the lifting mechanism to limit the connecting components on any workbench 2, which simplifies the structure of the laser cutting machine and reduces production costs and assembly difficulty. In this embodiment, the main body of the lifting mechanism is formed by the interlocking of the first profile tube 4 and the second profile tube 5. Only two sizes of profile tubes need to be prepared and cut into several sections. Its advantage is that the profile tubes are inexpensive, and the limiting structure can be achieved by drilling holes in the upper side wall of the profile tube, which is easy to process and easy to produce.

[0048] Example 2

[0049] Based on Embodiment 1, this embodiment further defines a worktable assembly for a laser cutting machine with positioning function. The machine body 1 is equipped with a guide mechanism for the lifting assembly to move closer to or further away from the processing position. Figure 3 , 10As shown, the guiding mechanism includes a guide rail 12 horizontally arranged on the machine body 1 along the moving direction of the worktable 2. A slider 1201 is guided on the guide rail 12, and a base 13 is fixedly arranged on the slider 1201. The machine body 1 is provided with an adjustment mechanism for adjusting and locking the distance between the lifting structure and the processing position. Figure 2 , 3 As shown in Figure 10, the adjustment mechanism includes a base 14 fixedly mounted on the machine body 1. The base 14 has a threaded hole 1401 horizontally facing the worktable 2. An adjustment bolt 15 with a center hole 1501 is screwed onto the threaded hole 1401 of the base 14. The adjustment bolt 15 has a locking bolt 16 that passes through the center hole 1501 and is screwed onto the base 13. When the locking bolt 16 is tightened, its large end abuts against the end face of the adjustment bolt 15. When the locking bolt 16 is not tightened, the adjustment bolt 15 can abut against the base 13 and push the base 13 towards the processing position after being screwed into the base 14, or abut against the large end of the locking bolt 16 and pull the base 13 away from the processing position when being screwed out of the base 14.

[0050] Based on the above structure, refer to Figure 2 , 3 As can be seen from 8 and 10, in this embodiment, a laser cutting machine worktable assembly with positioning function uses an adjustment component to enable the lifting mechanism to move and lock relative to the worktable 2. During assembly, the position of the lifting mechanism only needs to be adjusted according to the position of the pull rod 6 to achieve the fit, which can effectively reduce the assembly accuracy and thus reduce the processing difficulty.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A worktable assembly for a laser cutting machine with positioning function, comprising a machine body (1), a pair of worktables (2) arranged parallel to each other on the machine body (1), and a positioning device provided between the machine body (1) and the worktables (2), characterized in that: The positioning device includes a lifting mechanism that is guided and lifted relative to the machine body (1), and a connecting component that is respectively set on two worktables (2) and docks with the lifting mechanism when the worktable (2) is in the processing position. A limiting structure is formed between the lifting mechanism and the connecting component to restrict the connecting component from disengaging from the lifting mechanism when any connecting component docks with the lifting mechanism and when the lifting mechanism rises or falls.

2. The worktable assembly for a laser cutting machine with positioning function according to claim 1, characterized in that: The lifting mechanism includes a first profile tube (4) arranged vertically relative to the body (1), a second profile tube (5) slidably arranged along the inner wall of the first profile tube (4), a drive assembly for driving the second profile tube (5) to rise and fall, and a limiting assembly located between the first profile tube (4) and the second profile tube (5) for limiting the lifting stroke of the second profile tube (5).

3. The worktable assembly for a laser cutting machine with positioning function according to claim 2, characterized in that: The connecting component includes a pull rod (6) protruding from the worktable (2). The second profile tube (5) has a through hole (501) for the pull rod (6) to partially extend into. The limiting structure includes a limiting ring groove (601) opened near the end of the pull rod (6) and a limiting slide groove (502) that communicates with the through hole (501) and allows the limiting ring groove (601) to be engaged when the second profile tube (5) is raised or lowered. The inner diameter of the through hole (501) is larger than the outer diameter of the pull rod (6). The width of the limiting ring groove (601) is clearance-fitted with the wall thickness of the second profile tube (5). The through hole (501) and the limiting slide groove (502) are arranged vertically along the second profile tube (5) in two sets with the spacing equal to the height difference between the two pull rods (6).

4. The worktable assembly for a laser cutting machine with positioning function according to claim 3, characterized in that: The two ends of the limiting annular groove (601) are formed with guide structures to guide the pipe wall of the second profile tube (5) to be inserted. The guide structures include conical surfaces (602) formed at both ends of the limiting annular groove (601). The angle between the conical surfaces (602) and the end face of the limiting annular groove (601) is in the range of 150° to 170°.

5. The worktable assembly for a laser cutting machine with positioning function according to claim 3, characterized in that: Both the first profile tube (4) and the second profile tube (5) are square tubes, with through holes (501) and limiting grooves (502) penetrating both sides of the second profile tube (5).

6. The worktable assembly for a laser cutting machine with positioning function according to claim 2, characterized in that: The drive assembly includes an elastic element (7) for driving the second profile tube (5) upward and an electromagnet (8) for driving the second profile tube (5) downward. The electromagnet (8) is fixed relative to the first profile tube (4), and an iron block (9) that can be attracted by the electromagnet (8) is provided inside the second profile tube (5).

7. A worktable assembly for a laser cutting machine with positioning function according to claim 2, characterized in that: The limiting assembly includes a limiting screw that passes through both the first profile tube (4) and the second profile tube (5). The second profile tube (5) has a waist-shaped groove vertically provided for the limiting screw to pass through.

8. The worktable assembly for a laser cutting machine with positioning function according to claim 1, characterized in that: The machine body (1) is provided with a guide mechanism for the lifting assembly to move closer to or further away from the processing position, and an adjustment mechanism for adjusting and locking the distance between the lifting structure and the processing position.

9. A worktable assembly for a laser cutting machine with positioning function according to claim 8, characterized in that: The guiding mechanism includes a guide rail (12) horizontally arranged on the machine body (1) along the moving direction of the worktable (2) and a slider (1201) arranged on the guide rail (12). A base (13) connected to the adjustment mechanism is fixed on the slider (1201), and the lifting mechanism is fixed on the base (13).

10. A worktable assembly for a laser cutting machine with positioning function according to claim 9, characterized in that: The adjustment mechanism includes a base (14) fixedly mounted on the machine body (1), an adjustment bolt (15) with a center hole (1501) and horizontally screwed onto the base (14), and a locking bolt (16) that passes through the center hole (1501) and is screwed onto the base (13). When the locking bolt (16) is tightened, its large end abuts against the end face of the adjustment bolt (15). When the locking bolt (16) is not tightened, the adjustment bolt (15) continuously screws into the base (14) and abuts against the base (13) and pushes the base (13) towards the processing position, or continuously screws out of the base (14) and abuts against the large end of the locking bolt (16) and pulls the base (13) away from the processing position.

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