A hardware flatness laser measuring device

Abstract

The application discloses a kind of hardware flatness laser measuring equipment, it is related to hardware detection technical field, including base, the top of base is equipped with workbench, the outer side of positioning column is equipped with with connecting hose being connected with adjusting support piece, the top of positioning disc is provided with leveling control unit.The application is provided with adjusting support piece, when the sleeve ring is moved up along with connecting frame, the sleeve ring will extrude inclined connecting rod, so as to increase the support range of support sleeve, similarly, when the sleeve ring is moved down, the limit movable block will move towards the center of positioning disc, so as to reduce the support range of support sleeve, so the support range of support sleeve can be adjusted according to the size of workpiece, the application range of equipment is increased, the hardware is placed on the top of support sleeve, the protruding part of hardware will push the corresponding support sleeve to move down, so it can prevent the overall hardware from tilting due to protrusion when placing the hardware.

Description

Technical Field

[0001] This invention relates to the field of hardware component inspection technology, specifically a laser measurement device for the flatness of hardware components. Background Technology

[0002] Flatness is a core geometric tolerance indicator for hardware components such as stamped parts, flanges, and sheet metal brackets. The flatness of the workpiece directly determines the subsequent assembly and fitting accuracy, welding and splicing quality, and the reliability of the finished product. Therefore, in industrial production, it is necessary to conduct full-coverage flatness inspection on batches of hardware parts. With the popularization of non-contact precision inspection technology, the industry generally uses laser measuring instruments to complete multi-point flatness scanning inspection of hardware parts. The laser measuring instrument is moved above different points on the workpiece surface by a slide table to collect height data. The flatness of the workpiece is evaluated by calculating the height difference between multiple points. It has the advantages of non-contact, high precision, and fast inspection speed, and is widely used in automated quality inspection processes for hardware parts. However, the existing supporting tooling and mechanical transmission structure still have several inherent defects, which restrict the inspection accuracy and equipment versatility of laser measuring instruments.

[0003] Conventional testing stations use an integrated flat fixed table to support workpieces. A large number of hardware parts have integrated bottom surfaces with reinforcing ribs, positioning bosses, and assembly protrusions. After the workpiece is placed, it only relies on a single point of support from the protrusions, leaving a large area of ​​the table suspended. This can easily cause the workpiece to tilt as a whole. The data collected by the laser measuring instrument cannot reflect the original true planar state of the workpiece, which can easily lead to misjudgment or omission of batch products. Summary of the Invention

[0004] The purpose of this invention is to provide a laser measurement device for the flatness of hardware parts, in order to solve the problem of inconvenience in placing and measuring workpieces with protrusions.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser measuring device for the flatness of hardware parts, comprising a base, a worktable mounted on the top of the base, a controller body mounted on the bottom of the worktable, support frames mounted on both sides of the worktable, a slide mounted on the top of the support frames above the worktable, a laser measuring instrument mounted on the bottom of the slide, a water tank mounted on the top of the worktable below the laser measuring instrument, a positioning column mounted on the top of the water tank, a positioning plate mounted on the top of the positioning column, an adjustment support connected to a connecting hose mounted on the outer side of the positioning column, a leveling control unit mounted on the top of the positioning plate, and multiple support sleeves connected to the outer side of the positioning column via the adjustment support.

[0006] As a further embodiment of the present invention: the positioning support includes a collar movably sleeved on the outside of the positioning post. The outer wall of the collar is rotatably connected to multiple inclined connecting rods via a rotating shaft. The multiple inclined connecting rods are evenly distributed along the center of the collar. Multiple second slide rails are installed at the edge of the positioning plate. A limiting movable block is slidably connected to the inner side of the second slide rail. The top of the inclined connecting rod is rotatably connected to the bottom of the limiting movable block via a rotating shaft. A piston rod is installed on the top of the limiting movable block. A support sleeve is sleeved on the outer side of the piston rod. A guide cavity extending through to the bottom of the piston rod is opened on the top of the piston rod. A telescopic spring connected to the top of the limiting movable block is provided at the bottom of the support sleeve. A first threaded rod located on one side of the water storage tank is installed on the top of the controller body. A connecting frame connected to the collar is provided on the outer side of the first threaded rod.

[0007] As a further embodiment of the present invention: the adjusting support further includes an annular sleeve plate installed on the top of the inner wall of the water storage tank. The outer wall of the annular sleeve plate has a guide hole extending to the inner wall of the annular sleeve plate. The bottom of the inner wall of the water storage tank is rotatably connected to a first transmission bevel gear via a bearing. A rotating rod extending to the inner side of the water storage tank is provided on the outer side of the water storage tank. One end of the rotating rod is provided with a second transmission bevel gear meshing with the first transmission bevel gear. An extension rod is installed at the top of the first transmission bevel gear. A third threaded rod is provided at the top of the extension rod. A positioning frame is sleeved on the outer side of the third threaded rod. An annular baffle located inside the annular sleeve plate is provided on the outer side of the positioning frame. A connecting hose connected to a limiting movable block is provided at one end of the guide hole. A cavity is provided inside the limiting movable block.

[0008] As a further embodiment of the present invention: the number of the inclined connecting rods is equal to that of the second slide rail, and the center of the collar is coaxial with the center of the positioning disk.

[0009] As a further embodiment of the present invention: the outer wall diameter of the annular baffle is equal to the inner wall diameter of the annular sleeve, and the outer wall of the annular baffle is slidably connected to the annular sleeve by a slider.

[0010] As a further embodiment of the present invention: the support sleeve is connected to the annular sleeve plate through a guide cavity, a cavity, and a connecting hose, and the annular sleeve plate is a hollow, bottomless cylindrical structure.

[0011] As a further embodiment of the present invention: the height of the annular baffle is greater than the diameter of the guide hole, and the length of the third threaded rod is greater than the maximum distance from the top of the annular baffle to the guide hole.

[0012] As a further embodiment of the present invention: the leveling control unit includes a second threaded rod installed on the top of the positioning plate, a threaded sleeve sleeved on the outer side of the second threaded rod, a plurality of first slide rails installed on the outer wall of the threaded sleeve and located above the second slide rail, the plurality of first slide rails being evenly distributed along the center of the threaded sleeve, an annular contact piece installed at the bottom edge of the support sleeve and located below the first slide rail, the support sleeve penetrating through the first slide rail, long strip contact pieces installed on both sides of the bottom of the first slide rail, and a warning light installed on one side of the support frame.

[0013] As a further embodiment of the present invention: the elongated contact pieces on both sides of the bottom of the first slide rail are located above the annular contact piece, the elongated contact pieces on adjacent first slide rails are electrically connected by wires, any elongated contact piece at the bottom of the first slide rail is electrically connected to an external power supply, and the annular contact piece at the bottom of one of the support sleeves is electrically connected to a warning light.

[0014] As a further embodiment of the present invention: the center of the second threaded rod is coaxial with the center of the positioning disk, and the plurality of first slide rails on the outer wall of the threaded sleeve are distributed at equal distances along the center of the second threaded rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up an adjustable support component, the connecting frame moves up or down along the first threaded rod through rotation. When the collar moves upward with the connecting frame, it squeezes the inclined connecting rod, thereby increasing the support range of the support sleeve. Similarly, when the collar moves downward, the limiting block moves towards the center of the positioning plate, thereby reducing the support range of the support sleeve. This allows the support range of the support sleeve to be adjusted according to the size of the workpiece, increasing the applicability of the equipment. Hardware parts can be placed on the support... At the top of the sleeve, the supporting sleeve will move down under the weight of the hardware, and the protruding part of the hardware will push the corresponding supporting sleeve down. This can prevent the hardware from tilting as a whole due to the protrusion when it is placed. Then, rotate the rotating rod, and the positioning frame will move the annular baffle up to block the guide hole, so that the aqueous solution inside the supporting sleeve loses the flow space, further improving the stability of the hardware and greatly improving the versatility of the tooling. 2. By setting a leveling control unit, when the tops of multiple support sleeves are aligned, the long strip contact piece below the first slide rail corresponding to the annular contact piece is in contact, and the warning light is powered on. When the tops of multiple support sleeves are misaligned, some annular contact pieces will separate from the long strip contact pieces. At this time, a complete circuit cannot be formed between the external power supply, the long strip contact pieces, the annular contact pieces, and the warning light, and the warning light will be de-energized. Then, the second threaded rod is rotated, which causes the threaded sleeve to move the first slide rail downward, thereby pressing the annular contact piece. The pressure of the first slide rail on the annular contact piece changes the height of the support sleeve. When the warning light lights up again, it indicates that the tops of multiple support sleeves are now aligned, thus ensuring that the tops of multiple support sleeves are aligned before placing the workpiece, further improving the stability of the hardware placement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the water storage tank and the second threaded rod of the present invention; Figure 3 This is a schematic diagram showing the connection between the collar and the second slide rail of the present invention; Figure 4 This is a schematic diagram showing the connection between the support sleeve and the limiting movable block of the present invention; Figure 5 This is a schematic diagram showing the connection between the connecting hose and the support sleeve of the present invention; Figure 6 This is a schematic diagram of the internal structure of the water storage tank of the present invention; Figure 7 This is a schematic diagram showing the connection between the support sleeve and the first slide rail of the present invention; Figure 8 This is a schematic diagram showing the connection between the second threaded rod and the first slide rail of the present invention.

[0017] In the diagram: 1. Base; 2. Workbench; 3. Controller body; 4. Support frame; 5. Slide table; 6. Laser measuring instrument; 7. Warning light; 8. Water tank; 9. First threaded rod; 10. Connecting frame; 11. Collar; 12. Connecting hose; 13. Positioning pin; 14. Positioning plate; 15. Second threaded rod; 16. Support sleeve; 17. First slide rail; 18. Second slide rail; 19. Limiting block; 20. Diagonal connecting rod; 21. Annular contact piece; 22. Telescopic spring; 23. Piston rod; 24. Guide cavity; 25. Cavity; 26. Annular baffle; 27. Annular sleeve; 28. Guide hole; 29. ​​Third threaded rod; 30. Extension rod; 31. First transmission bevel gear; 32. Second transmission bevel gear; 33. Positioning frame; 34. Rotating rod; 35. Threaded sleeve; 36. Long strip contact piece. Detailed Implementation

[0018] 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.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0020] Please see Figures 1 to 8In this embodiment of the invention, a laser measurement device for the flatness of hardware parts includes a base 1, a worktable 2 mounted on the top of the base 1, a controller body 3 mounted on the bottom of the worktable 2, support frames 4 mounted on both sides of the worktable 2, a slide table 5 mounted on the top of the support frame 4 above the worktable 2, a laser measuring instrument 6 mounted on the bottom of the slide table 5, a water tank 8 mounted on the top of the worktable 2 below the laser measuring instrument 6, a positioning column 13 mounted on the top of the water tank 8, a positioning plate 14 mounted on the top of the positioning column 13, an adjustment support connected to a connecting hose 12 mounted on the outside of the positioning column 13, a leveling control unit mounted on the top of the positioning plate 14, and multiple support sleeves 16 connected to the outside of the positioning column 13 via the adjustment support.

[0021] In this embodiment, when measuring the flatness of the hardware, the size of the hardware is first used to operate the adjustment support to adjust the position of the support sleeve 16. At the same time, the leveling control unit determines whether the tops of the multiple support sleeves 16 are aligned. Then, the hardware to be measured is placed on top of the support sleeve 16, with the surface to be measured facing the laser measuring instrument 6. The support sleeve 16 supports the hardware, and the operation of the adjustment support allows the support sleeve 16 to adaptively adjust according to the surface of the hardware away from the laser measuring instrument 6, thereby preventing the hardware from tilting due to the bottom protrusion. Then, the slide table 5 drives the laser measuring instrument 6 to move, so that the laser measuring instrument 6 can measure different positions on the top of the hardware. The flatness of the workpiece is evaluated by multi-point height difference calculation.

[0022] Please refer to this carefully. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The adjustment support includes a collar 11 movably sleeved on the outside of the positioning column 13. The outer wall of the collar 11 is rotatably connected to multiple inclined connecting rods 20 via a rotating shaft. The multiple inclined connecting rods 20 are evenly distributed along the center of the collar 11. Multiple second slide rails 18 are installed at the edge of the positioning disk 14. The inner side of the second slide rail 18 is slidably connected to a limit block 19. The top of the inclined connecting rod 20 is rotatably connected to the bottom of the limit block 19 via a rotating shaft. A piston rod 23 is installed on the top of the limit block 19. A support sleeve 16 is sleeved on the outside of the piston rod 23. A guide cavity 24 extending through to the bottom of the piston rod 23 is opened on the top of the piston rod 23. A telescopic spring 22 connected to the top of the limit block 19 is provided at the bottom of the support sleeve 16. A first threaded rod 9 located on one side of the water storage tank 8 is installed on the top of the controller body 3. A connecting frame 10 connected to the collar 11 is provided on the outside of the first threaded rod 9. The adjustment support also includes an annular sleeve plate 27 installed on the top of the inner wall of the water storage tank 8. The outer wall of the annular sleeve plate 27 is provided with a guide hole 28 extending to the inner wall of the annular sleeve plate 27. The bottom of the inner wall of the water storage tank 8 is rotatably connected to a first transmission bevel gear 31 via a bearing. A rotating rod 34 extending to the inner side of the water storage tank 8 is provided on the outer side of the water storage tank 8. One end of the rotating rod 34 is provided with a second transmission bevel gear 32 that meshes with the first transmission bevel gear 31. An extension rod 30 is installed at the top of the first transmission bevel gear 31. A third threaded rod 29 is provided at the top of the extension rod 30. A positioning frame 33 is sleeved on the outer side of the third threaded rod 29. An annular baffle 26 located inside the annular sleeve plate 27 is provided on the outer side of the positioning frame 33. A connecting hose 12 connected to a limiting movable block 19 is provided at one end of the guide hole 28. A cavity 25 is provided on the inner side of the limiting movable block 19.

[0023] Among them, the number of inclined connecting rods 20 and the number of second slide rails 18 are equal, the center of the collar 11 is coaxial with the center of the positioning disk 14, the outer diameter of the annular baffle 26 is equal to the inner diameter of the annular sleeve 27, the outer wall of the annular baffle 26 is slidably connected to the annular sleeve 27 through a slider, the support sleeve 16 is connected to the annular sleeve 27 through the guide cavity 24, the cavity 25, and the connecting hose 12, the annular sleeve 27 is a hollow, bottomless cylindrical structure, the height of the annular baffle 26 is greater than the diameter of the guide hole 28, and the length of the third threaded rod 29 is greater than the maximum distance from the top of the annular baffle 26 to the guide hole 28.

[0024] In this embodiment, the first threaded rod 9 is rotated first. The rotation of the first threaded rod 9 causes the connecting frame 10 to move upwards or downwards along the first threaded rod 9. At this time, the connecting frame 10 drives the collar 11 to move. When the collar 11 moves upwards with the connecting frame 10, it presses against the inclined connecting rod 20. The inclined connecting rod 20 then drives the limiting movable block 19 to move. The limiting movable block 19 then moves away from the center of the positioning disk 14, thus increasing the distance between the multiple supporting sleeves 16 and the center of the positioning disk 14, thereby increasing the support range of the supporting sleeves 16. Similarly, when the collar 11 moves downwards, the limiting movable block 19 moves towards the center of the positioning disk 14, thereby reducing the support range of the supporting sleeves 16. Thus, the support range of the supporting sleeves 16 can be adjusted according to the size of the workpiece, increasing the applicability of the equipment. Finally, the hardware is placed on top of the supporting sleeve 16. At this point, the support sleeve 16 will move downward under the weight of the hardware, and the protruding part of the hardware will push the corresponding support sleeve 16 downward. During this process, the solution inside the support sleeve 16 will enter the water storage tank 8 through the guide cavity 24, cavity 25, connecting hose 12, and guide hole 28. At the same time, the telescopic spring 22 will contract, thus preventing the hardware from tilting due to the protrusion when it is placed. Then, the rotating rod 34 will be rotated, and the rotation of the rotating rod 34 will cause the second transmission bevel gear 32 to drive the first transmission bevel gear 31 to rotate, thereby causing the positioning frame 33 to move along the third threaded rod 29. The movement of the positioning frame 33 will cause the annular baffle 26 to move upward, thereby blocking the guide hole 28, so that the aqueous solution inside the support sleeve 16 loses the flow space, further improving the stability of the hardware placement and greatly improving the versatility of the tooling.

[0025] Please refer to this carefully. Figure 2 , Figure 3 , Figure 7 , Figure 8 The leveling control unit includes a second threaded rod 15 mounted on the top of the positioning plate 14. A threaded sleeve 35 is sleeved on the outside of the second threaded rod 15. Multiple first slide rails 17 are mounted on the outer wall of the threaded sleeve 35 and located above the second slide rail 18. The multiple first slide rails 17 are evenly distributed along the center of the threaded sleeve 35. An annular contact piece 21 located below the first slide rail 17 is mounted at the bottom edge of the support sleeve 16. The support sleeve 16 passes through the first slide rail 17. Long strip contact pieces 36 are mounted on both sides of the bottom of the first slide rail 17. A warning light 7 is mounted on one side of the support frame 4.

[0026] Among them, the long strip contact pieces 36 on both sides of the bottom of the first slide rail 17 are all located above the annular contact piece 21. The long strip contact pieces 36 on adjacent first slide rails 17 are electrically connected by wires. Any long strip contact piece 36 at the bottom of the first slide rail 17 is electrically connected to an external power supply. The annular contact piece 21 at the bottom of one of the support sleeves 16 is electrically connected to the warning light 7. The center of the second threaded rod 15 is coaxial with the center of the positioning plate 14. Multiple first slide rails 17 on the outer wall of the threaded sleeve 35 are distributed at equal distances along the center of the second threaded rod 15.

[0027] In this embodiment, when the tops of the multiple support sleeves 16 are flush, the elongated contact piece 36 below the first slide rail 17 corresponding to the annular contact piece 21 is in contact, and the warning light 7 is energized and illuminates. When the tops of the multiple support sleeves 16 are misaligned, some of the annular contact pieces 21 will separate from the elongated contact pieces 36. At this time, a complete circuit cannot be formed between the external power supply, the elongated contact piece 36, the annular contact piece 21, and the warning light 7, and the warning light 7 will be de-energized. Rotating the second threaded rod 15 causes the threaded sleeve 35 to move the first slide rail 17 downward, thereby pressing the annular contact piece 21. The pressing of the annular contact piece 21 by the first slide rail 17 changes the height of the support sleeve 16. When the warning light 7 lights up again, it indicates that the tops of the multiple support sleeves 16 are now aligned, thus ensuring that the tops of the multiple support sleeves 16 are aligned before placing the workpiece, further improving the stability of the hardware placement.

[0028] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser measuring device for the flatness of hardware parts, comprising a base (1), characterized in that, A workbench (2) is installed on the top of the base (1). A controller body (3) is installed at the bottom of the workbench (2). Support frames (4) are installed on both sides of the workbench (2). A slide (5) is installed on the top of the support frame (4) above the workbench (2). A laser measuring instrument (6) is installed at the bottom of the slide (5). A water tank (8) is installed on the top of the workbench (2) below the laser measuring instrument (6). A positioning column (13) is installed on the top of the water tank (8). A positioning plate (14) is installed on the top of the positioning column (13). An adjustment support connected to the connecting hose (12) is installed on the outside of the positioning column (13). A leveling control unit is installed on the top of the positioning plate (14). Multiple support sleeves (16) are connected to the outside of the positioning column (13) through the adjustment support.

2. The laser measurement device for the flatness of hardware parts according to claim 1, characterized in that, The adjustment support includes a collar (11) movably sleeved on the outside of the positioning post (13). Multiple inclined connecting rods (20) are rotatably connected to the outer wall of the collar (11) via a rotating shaft. The multiple inclined connecting rods (20) are evenly distributed along the center of the collar (11). Multiple second slide rails (18) are installed at the edge of the positioning disk (14). A limit block (19) is slidably connected to the inner side of the second slide rail (18). The top of the inclined connecting rod (20) is rotatably connected to the bottom of the limit block (19) via a rotating shaft. The limit block (19)... A piston rod (23) is installed on the top of the piston rod (23), and a support sleeve (16) is sleeved on the outside of the piston rod (23). A guide cavity (24) is opened on the top of the piston rod (23) and extends to the bottom of the piston rod (23). A telescopic spring (22) connected to the top of the limiting movable block (19) is provided at the bottom of the support sleeve (16). A first threaded rod (9) located on the side of the water storage tank (8) is installed on the top of the controller body (3). A connecting frame (10) connected to the collar (11) is provided on the outside of the first threaded rod (9).

3. The laser measurement device for the flatness of hardware parts according to claim 2, characterized in that, The adjustment support also includes an annular sleeve plate (27) installed on the top of the inner wall of the water storage tank (8). The outer wall of the annular sleeve plate (27) is provided with a guide hole (28) extending to the inner wall of the annular sleeve plate (27). The bottom of the inner wall of the water storage tank (8) is rotatably connected to a first transmission bevel gear (31) via a bearing. A rotating rod (34) extending to the inner side of the water storage tank (8) is provided on the outer side of the water storage tank (8). One end of the rotating rod (34) is provided with a second transmission bevel gear (31) meshing with the first transmission bevel gear (31). 2) An extension rod (30) is installed at the top of the first transmission bevel gear (31). A third threaded rod (29) is provided at the top of the extension rod (30). A positioning frame (33) is sleeved on the outside of the third threaded rod (29). An annular baffle (26) located inside the annular sleeve plate (27) is provided on the outside of the positioning frame (33). A connecting hose (12) connected to the limiting movable block (19) is provided at one end of the guide hole (28). A cavity (25) is opened on the inner side of the limiting movable block (19).

4. The laser measurement device for the flatness of hardware parts according to claim 3, characterized in that, The number of the inclined connecting rods (20) is equal to that of the second slide rails (18), and the center of the collar (11) is coaxial with the center of the positioning disk (14).

5. The laser measurement device for the flatness of hardware parts according to claim 3, characterized in that, The outer diameter of the annular baffle (26) is equal to the inner diameter of the annular sleeve (27), and the outer wall of the annular baffle (26) is slidably connected to the annular sleeve (27) by a slider.

6. The laser measurement device for the flatness of hardware parts according to claim 3, characterized in that, The support sleeve (16) is connected to the annular sleeve plate (27) through the guide cavity (24), the cavity (25), and the connecting hose (12). The annular sleeve plate (27) is a hollow, bottomless cylindrical structure.

7. The laser measurement device for the flatness of hardware parts according to claim 3, characterized in that, The height of the annular baffle (26) is greater than the diameter of the guide hole (28), and the length of the third threaded rod (29) is greater than the maximum distance from the top of the annular baffle (26) to the guide hole (28).

8. The laser measurement device for the flatness of hardware parts according to claim 3, characterized in that, The leveling control unit includes a second threaded rod (15) installed on the top of the positioning plate (14). A threaded sleeve (35) is sleeved on the outside of the second threaded rod (15). Multiple first slide rails (17) are installed on the outer wall of the threaded sleeve (35) and located above the second slide rail (18). The multiple first slide rails (17) are distributed at equal distances along the center of the threaded sleeve (35). An annular contact piece (21) located below the first slide rail (17) is installed at the bottom edge of the support sleeve (16). The support sleeve (16) passes through the first slide rail (17). Long strip contact pieces (36) are installed on both sides of the bottom of the first slide rail (17). A warning light (7) is installed on one side of the support frame (4).

9. The laser measurement device for the flatness of hardware parts according to claim 8, characterized in that, The long strip contact pieces (36) on both sides of the bottom of the first slide rail (17) are located above the annular contact piece (21). The long strip contact pieces (36) on adjacent first slide rails (17) are electrically connected by wires. Any long strip contact piece (36) at the bottom of the first slide rail (17) is electrically connected to an external power supply. The annular contact piece (21) at the bottom of one of the support sleeves (16) is electrically connected to the warning light (7).

10. A laser measurement device for the flatness of hardware parts according to claim 8, characterized in that, The center of the second threaded rod (15) is coaxial with the center of the positioning disk (14), and the multiple first slide rails (17) on the outer wall of the threaded sleeve (35) are distributed at equal distances along the center of the second threaded rod (15).

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