Mold cavity detection jig with self-calibration function

Abstract

The utility model relates to the technical field of mold cavity detection, and discloses a mold cavity detection jig with a self-calibration function, which comprises a fixing frame, a connecting frame is fixedly connected to the top end of the fixing frame, a sliding groove shell is fixedly connected to the top end of the inner wall of the connecting frame, a first motor is fixedly connected to the front end of the sliding groove shell, and a second motor is fixedly connected to the rear end of the sliding groove shell. A second motor is fixedly connected to the rear end of the sliding groove shell, a moving block is connected to the driving end of the first motor through a moving set, a laser detector is fixedly connected to the bottom end of the moving block, first electric hydraulic cylinders are fixedly connected to the left end and the right end of the fixing frame correspondingly, and a fixing table is fixedly connected to the driving ends of the first electric hydraulic cylinders. The upper end and the lower end of the inner wall of the fixing table are fixedly connected with second electric hydraulic cylinders. According to the utility model, the electric hydraulic cylinder I pushes the fixed table to clamp the die, and the correction function of the contraction plate is combined to realize accurate fixation, intelligent optimization of a detection path and full-automatic two-dimensional contour scanning, so that the measurement requirements of die cavities in different detection ranges are met.

Description

Technical Field

[0001] This utility model relates to the field of mold cavity detection technology, and in particular to a mold cavity detection fixture with self-calibration function. Background Technology

[0002] Mold cavity inspection fixtures are key equipment for meeting the high-precision requirements of modern molds. Traditional coordinate measuring machines are inefficient and cannot be used for online inspection. With the advancement of optical measurement and machine vision technologies, multi-sensor fusion technology combines contact and non-contact measurement to improve efficiency while ensuring accuracy. This drives the development of inspection technology towards intelligence and automation, meeting the higher quality control requirements of modern manufacturing.

[0003] As a key piece of equipment for precision testing, the positioning and adjustment performance of the mold cavity inspection fixture directly affects the measurement accuracy and efficiency. Current inspection head position adjustment technology has significant shortcomings. Traditional mechanical adjustment mechanisms rely on manual operation, which not only has limited adjustment accuracy but also takes a long time, seriously affecting the inspection efficiency. When inspecting multi-cavity molds, the lack of a rapid positioning reference and digital feedback system can lead to fluctuations in repeatability of positioning accuracy. In addition, existing adjustment mechanisms generally suffer from problems such as complex operation and poor stability. When inspecting complex surfaces, operators often need to make repeated adjustments, which increases labor intensity and easily introduces human error.

[0004] In response to this technical problem, this application proposes a mold cavity inspection fixture with self-calibration function. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mold cavity inspection fixture with self-calibration function. The fixture uses an electric hydraulic cylinder to push a fixed platform to clamp the mold, and combines the correction function of a shrink plate to achieve precise fixation. This enables intelligent optimization of the inspection path and fully automatic contour scanning, meeting the mold cavity measurement needs of different inspection ranges.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mold cavity inspection fixture with self-calibration function includes a fixed frame, a connecting frame fixedly connected to the top of the fixed frame, a sliding shell fixedly connected to the top of the inner wall of the connecting frame, a motor 1 fixedly connected to the front end of the sliding shell, a motor 2 fixedly connected to the rear end of the sliding shell, a moving block connected to the drive end of the motor 1 via a moving assembly, a laser detector fixedly connected to the bottom end of the moving block, an electric hydraulic cylinder 1 fixedly connected to both the left and right ends of the fixed frame, a fixed platform fixedly connected to the drive end of the electric hydraulic cylinder 1, an electric hydraulic cylinder 2 fixedly connected to both the upper and lower ends of the inner wall of the fixed platform, a shrink plate connected to the drive end of the electric hydraulic cylinder 2 via a fixed assembly, and a central controller installed at the front end of the connecting frame.

[0008] Furthermore, the moving assembly includes a transmission slide rod fixedly connected to a drive end of the motor, and a sliding groove tube is slidably connected to the outer wall of the transmission slide rod.

[0009] Furthermore, a bevel gear one is fixedly connected to the outer wall of the sluice tube, a bevel gear two is meshed with the outer diameter of the bevel gear one, a screw two is fixedly connected to the rear end of the bevel gear two, and the inner wall of the moving block is threadedly connected to the outer wall of the screw two.

[0010] Furthermore, a screw is fixedly connected to the drive end of the second motor, and a movable platform is threadedly connected to the outer wall of the screw. The outer wall of the movable platform is slidably connected to the inner wall of the slide groove shell.

[0011] Furthermore, the fixing assembly includes a retractable frame that is slidably connected to both the upper and lower sides of the front and rear ends of the fixing platform, and the two fixed ends of the electric hydraulic cylinder are fixedly connected to the outer wall of the rear retractable frame.

[0012] Furthermore, each of the inner walls of the retractable frame is fixedly connected with a rack, with the tooth grooves of the racks at both the upper and lower ends facing each other. Each of the opposite ends of the fixed platform is rotatably connected with a transmission gear column, the outer diameter of which meshes with the outer wall of the rack.

[0013] Furthermore, the adjacent shrink plates are rotatably connected by a connecting shaft, and the outer wall of the connecting shaft located in the middle is rotatably connected to the inner wall of the fixed platform.

[0014] Furthermore, each of the two ends of the shrink plate is rotatably connected to an adapter rod, and the outer wall of the adapter rod is sleeved on the inner wall of the shrink frame.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, after the mold is positioned on the fixed frame, the second electric hydraulic cylinder drives the shrinking frame to move. The rack and pinion mesh with the transmission pinion to make the shrinking frames on both sides shrink synchronously, driving the adapter rod to make the shrinking plate assembly fit the shape of the mold. At the same time, the first electric hydraulic cylinder pushes the fixed table to clamp the mold. Combined with the correction function of the shrinking plate, precise fixing is achieved.

[0017] 2. In this utility model, the first screw is driven by the second motor to rotate, which drives the moving stage to move along the X-axis in the sliding groove housing, so that the laser detector can perform X-axis scanning; at the same time, the first motor drives the bevel gear set through the transmission slide rod and the sliding groove tube, which drives the second screw to move the moving block along the Y-axis in the moving stage, so as to achieve Y-axis scanning of the laser detector, thereby improving the detection flexibility. Attached Figure Description

[0018] Figure 1 This is a perspective view of a mold cavity inspection fixture with self-calibration function proposed in this utility model;

[0019] Figure 2 This is a half-sectional view of the connecting frame of a mold cavity detection fixture with self-calibration function proposed in this utility model;

[0020] Figure 3 This is a half-sectional view of the moving stage of a mold cavity detection fixture with self-calibration function proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of an electric hydraulic cylinder with self-calibration function for a mold cavity detection fixture proposed in this utility model;

[0022] Figure 5 This is a half-sectional view of the fixed platform of a mold cavity detection fixture with self-calibration function proposed in this utility model;

[0023] Figure 6 This is a half-sectional view of the shrinkage plate of a mold cavity detection fixture with self-calibration function proposed in this utility model.

[0024] Legend:

[0025] 1. Fixed frame; 2. Connecting frame; 3. Slide box housing; 4. Electric hydraulic cylinder one; 5. Motor one; 6. Motor two; 7. Fixed platform; 8. Retracting frame; 9. Screw one; 10. Laser detector; 11. Moving platform; 12. Adapter rod; 13. Retracting plate; 14. Connecting shaft; 15. Transmission slide rod; 16. Slide tube; 17. Bevel gear one; 18. Bevel gear two; 19. Screw two; 20. Moving block; 21. Electric hydraulic cylinder two; 22. Transmission gear column; 23. Rack. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-3 This utility model provides an embodiment of a mold cavity detection fixture with self-calibration function, including a fixed frame 1, a connecting frame 2 fixedly connected to the top of the fixed frame 1, a sliding shell 3 fixedly connected to the top of the inner wall of the connecting frame 2, a motor 5 fixedly connected to the front end of the sliding shell 3, a motor 6 fixedly connected to the rear end of the sliding shell 3, a moving block 20 connected to the driving end of the motor 5 via a moving assembly, a laser detector 10 fixedly connected to the bottom end of the moving block 20, the moving assembly including a transmission slide rod 15 fixedly connected to the driving end of the motor 5, a sliding tube 16 slidably connected to the outer wall of the transmission slide rod 15, a bevel gear 17 fixedly connected to the outer wall of the sliding tube 16, a bevel gear 18 meshing with the outer diameter of the bevel gear 17, a screw 19 fixedly connected to the rear end of the bevel gear 18, a screw 19 threadedly connected to the inner wall of the moving block 20, a screw 9 fixedly connected to the driving end of the motor 6, a moving stage 11 threadedly connected to the outer wall of the screw 9, and a moving stage 11 slidably connected to the inner wall of the sliding shell 3.

[0028] Specifically: When the system starts the high-precision servo motor 6, its output shaft drives the grinding-grade ball screw 9 to rotate with a repeatability of 0.001mm via the newly added coupling 31. The precision thread of the screw 9 drives the moving stage 11 to move smoothly along the X-axis linear guide rail within the hard anodized aluminum alloy slide housing 3. The moving speed can be steplessly adjusted within the range of 0.1-50mm / s. At the same time, the non-contact laser detector 10 mounted on the moving stage 11 uses a blue laser source for scanning. The synchronously started servo motor 5 drives the transmission slide rod 15 to rotate at a speed of 6000rpm via a bidirectional cross coupling. The slide bar 15 is hard chrome plated, and its spiral groove forms a low-friction transmission pair with the ceramic balls in the slide tube 16. This drives the nitrided bevel gear 17 and bevel gear 18 to mesh and transmit power. The bevel gear pair with a transmission ratio of 2:1 and zero backlash screw 19 drives the moving block 20 to move along the Y-axis on the cross roller guide rail of the moving table 11. The repeatability of the positioning accuracy reaches 0.003mm, which enables the laser detector 10 to achieve a Y-axis deflection of ±25° through the precision swing head mechanism. Finally, it realizes intelligent optimization of the detection path and fully automatic two-dimensional contour scanning, meeting the mold cavity measurement requirements of the detection range of φ1-φ200mm.

[0029] Reference Figures 4-6Electric hydraulic cylinder 4 is fixedly connected to both ends of the fixed frame 1. The drive end of electric hydraulic cylinder 4 is fixedly connected to the fixed platform 7. Electric hydraulic cylinder 21 is fixedly connected to both ends of the inner wall of the fixed platform 7. The drive end of electric hydraulic cylinder 21 is connected to the shrink plate 13 through the fixed assembly. A central controller is installed at the front end of the connecting frame 2. The fixed assembly includes shrink frame 8 which is slidably connected to both the upper and lower sides of the front and rear ends of the fixed platform 7. The fixed end of electric hydraulic cylinder 21 is fixedly connected to the outer wall of the rear shrink frame 8. The inner wall of the shrink frame 8 is fixedly connected to racks 23. The tooth grooves of the racks 23 at the upper and lower ends face each other. The opposite ends of the fixed platform 7 are rotatably connected to transmission pinions 22. The outer diameter of the transmission pinions 22 meshes with the outer wall of the racks 23. The adjacent shrink plates 13 are rotatably connected through connecting shafts 14. The outer wall of the connecting shaft 14 in the middle is rotatably connected to the inner wall of the fixed platform 7. The opposite ends of the left and right shrink plates 13 are rotatably connected to adapter rods 12. The outer wall of the adapter rods 12 is sleeved on the inner wall of the shrink frame 8.

[0030] Specifically: After the mold to be tested is precisely positioned in the V-shaped positioning groove of the fixed frame 1, the system detects the mold positioning signal through the pressure sensor, and then starts the high-precision electric hydraulic cylinder 21. This hydraulic cylinder adopts closed-loop servo control and pushes the double-sided shrinking frame 8 to move coaxially along the linear guide rail 24 at a feed speed of 0.02mm / s. At this time, the hardened alloy rack 23 welded to the bottom of the shrinking frame 8 and the transmission gear column 22 form a precision gear pair. Its 0.01mm-level reverse synchronization accuracy ensures that the two sides of the shrinking frame 8 achieve mirror symmetrical shrinking motion, and the movement of the shrinking frame 8 is transmitted to the universal joint adapter rod 12. The adjustable shrink plates 13 are designed in a split manner. The base plate is made of high-strength aluminum alloy, and the contact surface is inlaid with a 5mm thick polyurethane wear-resistant layer. The built-in micro displacement sensor provides real-time feedback on the fit status, ensuring that all contact surfaces form a uniform 0.05mm gap fit with the mold outline. At this time, the system triggers the second stage calibration process. The electric hydraulic cylinder 4 pushes the fixed stage 7 with a constant clamping force of 50kN, thereby completing the self-calibration test process. At the same time, the modular design of the fixture allows for the adaptation to mold testing requirements in the range of 50-5000mm by replacing shrink plate 13 components of different specifications.

[0031] Working principle: After the mold is placed on the fixed frame 1, the electric hydraulic cylinder 21 is activated to move the shrink frame 8. When the shrink frame 8 moves, the rack 23, in cooperation with the transmission pinion 22, causes the two sides of the shrink frame 8 to shrink relative to each other. This causes the shrink frame 8 to drive several shrink plates 13 to shrink through the adapter rod 12, thus causing the shrink plates 13 to shrink and conform to the shape of the outer side of the mold. When the electric hydraulic cylinder 4 is activated to move the fixed platform 7, the fixed platform 7 fixes the mold, allowing the fixed platform 7 to adjust the shape by combining the shrink plates 13. The mold is then fixed. After fixing, when the second motor 6 drives the first screw 9 to rotate, the first screw 9 drives the moving stage 11 to move within the slide box 3, allowing the laser detector 10 to rotate along the X-axis. Meanwhile, the first drive motor 5 drives the transmission slide rod 15 to rotate, and the transmission slide rod 15 drives the first bevel gear 17 to transmit power to the second bevel gear 18 through the slide tube 16. When the second bevel gear 18 rotates, it drives the second screw 19 to move the moving block 20 within the moving stage 11, allowing the laser detector 10 to rotate along the Y-axis, thereby improving the flexibility of the laser detector 10 during detection.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mold cavity inspection fixture with self-calibration function, comprising a fixing frame (1), characterized in that: The top of the fixed frame (1) is fixedly connected to the connecting frame (2), the top of the inner wall of the connecting frame (2) is fixedly connected to the sliding shell (3), the front end of the sliding shell (3) is fixedly connected to the motor one (5), the rear end of the sliding shell (3) is fixedly connected to the motor two (6), the driving end of the motor one (5) is connected to the moving block (20) through the moving group, the bottom end of the moving block (20) is fixedly connected to the laser detector (10), the left and right ends of the fixed frame (1) are fixedly connected to the electric hydraulic cylinder one (4), the driving end of the electric hydraulic cylinder one (4) is fixedly connected to the fixed platform (7), the upper and lower ends of the inner wall of the fixed platform (7) are fixedly connected to the electric hydraulic cylinder two (21), the driving end of the electric hydraulic cylinder two (21) is connected to the shrink plate (13) through the fixed group, and the front end of the connecting frame (2) is equipped with a central controller.

2. The mold cavity inspection fixture with self-calibration function according to claim 1, characterized in that: The moving assembly includes a transmission slide rod (15) fixedly connected to the drive end of motor (5), and a slide groove tube (16) is slidably connected to the outer wall of the transmission slide rod (15).

3. A mold cavity inspection fixture with self-calibration function according to claim 2, characterized in that: The outer wall of the sluice tube (16) is fixedly connected to a bevel gear one (17), the outer diameter of the bevel gear one (17) is meshed with a bevel gear two (18), the rear end of the bevel gear two (18) is fixedly connected to a screw two (19), and the inner wall of the moving block (20) is threadedly connected to the outer wall of the screw two (19).

4. A mold cavity inspection fixture with self-calibration function according to claim 1, characterized in that: The drive end of the second motor (6) is fixedly connected to the first screw (9), and the outer wall of the first screw (9) is threadedly connected to the moving platform (11), and the outer wall of the moving platform (11) is slidably connected to the inner wall of the slide box (3).

5. A mold cavity inspection fixture with self-calibration function according to claim 1, characterized in that: The fixed assembly includes a retractable frame (8) that is slidably connected to both the upper and lower sides of the front and rear ends of the fixed platform (7), and the fixed end of the electric hydraulic cylinder (21) is fixedly connected to the outer wall of the rear retractable frame (8).

6. A mold cavity inspection fixture with self-calibration function according to claim 5, characterized in that: The inner wall of the retractable frame (8) is fixedly connected with a rack (23), the tooth grooves of the rack (23) at the upper and lower ends face each other, and the opposite ends of the fixed platform (7) are rotatably connected with a transmission gear (22), the outer diameter of the transmission gear (22) meshes with the outer wall of the rack (23).

7. A mold cavity inspection fixture with self-calibration function according to claim 1, characterized in that: The shrink plates (13) are rotatably connected to each other by a connecting shaft (14), and the outer wall of the connecting shaft (14) located in the middle is rotatably connected to the inner wall of the fixed platform (7).

8. A mold cavity inspection fixture with self-calibration function according to claim 1, characterized in that: The left and right ends of the shrink plate (13) are rotatably connected to the opposite ends of the adapter rod (12), and the outer wall of the adapter rod (12) is sleeved on the inner wall of the shrink frame (8).

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