A positioning system and a nut hot-pressing positioning device

Abstract

This invention provides a positioning system and a nut hot-press positioning device, including a positioning table with multiple threaded mounting holes arranged in an array at its upper end, and multiple connecting seats. The lower end of each connecting seat has a threaded connecting shaft threadedly connected to the threaded mounting holes. The upper end of each connecting seat has a telescopic cylinder, and a threaded adjusting shaft is threadedly connected to the telescopic cylinder's telescopic shaft. A threaded adjusting sleeve is threadedly connected to the threaded adjusting shaft, and a handheld positioning piece is mounted on the threaded adjusting sleeve. A rotating sleeve is rotatably connected to the threaded adjusting sleeve, and the rotating sleeve has a rotating hole rotatably connected to the threaded adjusting sleeve. The rotation of the rotating sleeve and the threaded adjusting sleeve is damped, and an L-shaped clamping block is connected to one side of the rotating sleeve. This invention can position and fix plastic workpieces of different shapes, and can also use vision to assist in hole positioning, further improving positioning accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, and relates to a positioning system and a nut hot pressing positioning device. Background Technology

[0002] In modern industrial manufacturing, especially in the assembly of products such as electronics, automobiles, and home appliances, thermoforming metal inserts (such as nuts) to plastic workpieces is a common and important connection process. This process typically involves heating a metal nut to a certain temperature and then using mechanical pressure to press it into a pre-drilled hole in the plastic workpiece. This causes the plastic material to partially melt and encapsulate the nut. After cooling, a strong mechanical bond is formed, creating a reliable threaded connection point on the plastic part.

[0003] In existing technologies, the automated process for hot-pressing a nut to a plastic workpiece typically includes the following steps: First, a dedicated positioning device is used to fix and calibrate the position of the plastic workpiece to ensure that its pre-drilled hole is in the precise assembly position; then, the nut is automatically screened and oriented by a vibrating screen, and then heated by a heating device (such as a high-frequency induction heater); the heated nut is gripped by a gripper at the end of a robotic arm and precisely moved above the positioned plastic workpiece; finally, the high-temperature nut is pressed into the pre-drilled hole by vertical pressing to complete the hot-pressing connection.

[0004] However, this existing technical solution has significant drawbacks and limitations. First, because different models or shapes of plastic workpieces have different dimensions, structural features, and pre-drilled hole positions, a dedicated positioning device must be designed and equipped for each specific workpiece. This leads to frequent replacement of the entire positioning device when producing different products, increasing equipment investment costs and maintenance complexity, resulting in high overall positioning costs. Second, during the hot-pressing connection of the nut, the nut must be precisely aligned with the pre-drilled hole on the plastic workpiece. However, existing positioning mainly relies on automatic positioning via a pre-set program, lacking auxiliary identification positioning. If the plastic workpiece is not positioned accurately, misalignment with the hole will occur. Utility Model Content

[0005] The purpose of this utility model is to provide a positioning system and a nut hot-pressing positioning device, which can position and fix plastic workpieces of different shapes, and can also use vision to assist in hole positioning, thereby further improving positioning accuracy.

[0006] To solve the above-mentioned technical problems, this utility model provides a positioning system, including a positioning platform. The upper end of the positioning platform has a plurality of threaded mounting holes arranged in an array, and also includes a plurality of connecting seats. The lower end of each connecting seat is provided with a threaded connecting shaft that is threadedly connected to the threaded mounting holes. The upper end of each connecting seat is provided with a telescopic cylinder. The telescopic shaft of each telescopic cylinder is provided with a threaded adjusting shaft. Each threaded adjusting shaft is threadedly connected to a threaded adjusting sleeve. Each threaded adjusting sleeve is provided with a hand-held positioning piece. Each threaded adjusting sleeve is fitted with a rotating sleeve that is rotatably connected to it. Each rotating sleeve has a rotating hole that is rotatably connected to the corresponding threaded adjusting sleeve. The rotation of each rotating sleeve and the corresponding threaded adjusting sleeve is damped, so that the rotation of the rotating sleeve can drive the corresponding threaded adjusting sleeve to rotate relative to the corresponding threaded adjusting shaft. One side of each rotating sleeve is connected to an L-shaped clamping block.

[0007] By adopting the above technical solution, the position of the clamping blocks needs to be adjusted according to the shape of the plastic workpiece to be processed. Multiple threaded connecting shafts are reconnected to the corresponding threaded mounting holes. According to the thickness of the plastic workpiece, the height of the clamping blocks is adjusted by rotating the rotating sleeve relative to the threaded adjusting shaft. By holding the hand positioning plate and rotating the clamping blocks, all the clamping blocks can be rotated to press the plastic workpiece. When fixing the workpiece, the plastic workpiece is first placed in the middle of the positioning table. Then, the telescopic cylinder shortens to lower the clamping blocks and clamp the edge of the plastic workpiece.

[0008] The present invention is further provided in that each threaded adjusting sleeve is provided with a rotating ring on the outer side, and each rotating hole is provided with an annular connecting groove on the inner wall that is rotatably connected to the corresponding rotating ring.

[0009] The present invention is further configured such that each rotating sleeve is cut in half, and each rotating sleeve has a threaded connection hole on both sides of the corresponding threaded connection sleeve at the end away from the corresponding clamping block. The two halves of the rotating sleeve are connected into a whole by connecting the threaded connection hole and the bolt.

[0010] The present invention is further provided with a rubber pressure block at the lower end of each clamping pressure block.

[0011] The present invention also discloses a nut hot-pressing positioning device, wherein multiple mounting brackets are arranged upward on the outer side of the positioning platform, each mounting bracket is equipped with a smart camera facing downward at an angle toward the positioning platform, and longitudinal slide rails are arranged on both sides above the positioning platform, with a transverse slide rail perpendicular to them connected between the two longitudinal slide rails, and a longitudinal drive motor for driving the transverse slide rail to slide along its length direction is installed on the longitudinal slide rail, and a sliding positioning block that slides along its length direction is slidably connected on the transverse slide rail, and a transverse drive motor for driving its transverse sliding is installed on the transverse slide rail, and a laser ranging sensor is arranged downward on the sliding positioning block.

[0012] By adopting the above technical solution, after the plastic workpiece is positioned and fixed on the positioning table, the position of the reserved hole is initially captured by the intelligent camera on the plastic workpiece on the positioning table. Then, the longitudinal drive motor drives the transverse slide rail to move longitudinally, and the transverse drive motor drives the sliding positioning block to move laterally, which causes the laser range sensor to move arbitrarily above the plastic workpiece. The laser range sensor moves to the corresponding position based on the position of the reserved hole initially captured by the intelligent camera, and further determines the position of the reserved hole through distance perception. This allows the robotic arm to more accurately determine the position of the reserved hole, and enables the robotic arm to accurately press the nut gripped by the gripper into the reserved hole.

[0013] The present invention is further configured such that a longitudinal threaded drive shaft is rotatably connected within one longitudinal slide rail along its length direction, and the power output shaft of the longitudinal drive motor is connected to one end of the longitudinal threaded drive shaft; a limiting shaft is provided within another longitudinal slide rail along its length direction; and both ends of the transverse slide rail are respectively provided with a longitudinal threaded connecting sleeve threadedly connected to the longitudinal threaded drive shaft and a limiting sliding sleeve slidably connected to the limiting shaft.

[0014] The present invention is further configured such that a transverse threaded drive shaft is rotatably connected inside the transverse slide rail and arranged along its length direction, the power output shaft of the transverse drive motor is connected to one end of the transverse threaded drive shaft, and the sliding positioning block is provided with a transverse threaded connecting sleeve that is threadedly connected to the transverse threaded drive shaft.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, the clamping and positioning component of this utility model can freely adjust its position according to the workpiece to be positioned, so that it can meet the clamping and positioning of different workpieces, avoid the trouble of frequently replacing the entire positioning device, and reduce equipment investment costs.

[0017] Secondly, the present invention also adds an auxiliary identification and positioning system. The position of the reserved hole is initially captured by the intelligent camera, and the laser rangefinder further determines the position of the reserved hole through distance perception during the movement, so that the robotic arm can more accurately determine the position of the reserved hole. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1;

[0019] Figure 2 This is an exploded view used to show the connection between the telescopic cylinder, the threaded adjusting sleeve, and the clamping pressure block;

[0020] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2;

[0021] Figure 4 An exploded view used to show the connection between the sliding positioning block and the horizontal slide rail.

[0022] The components include: 1. Positioning platform; 2. Threaded mounting hole; 3. Connecting seat; 4. Threaded connecting shaft; 5. Telescopic cylinder; 6. Threaded adjusting shaft; 7. Threaded adjusting sleeve; 8. Handheld positioning plate; 9. Rotating sleeve; 10. Rotating hole; 11. Rotating ring; 12. Annular connecting groove; 13. Threaded connecting hole; 14. Clamping block; 15. Rubber block; 16. Mounting bracket; 17. Smart camera; 18. Longitudinal slide rail; 19. Transverse slide rail; 20. Longitudinal drive motor; 21. Longitudinal threaded drive shaft; 22. Limiting shaft; 23. Longitudinal threaded connecting sleeve; 24. Limiting sliding sleeve; 25. Sliding positioning block; 26. Transverse drive motor; 27. Transverse threaded drive shaft; 28. Transverse threaded connecting sleeve; 29. ​​Laser rangefinder sensor. Detailed Implementation

[0023] The positioning system and nut hot-pressing positioning device proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0024] Example 1, referring to Figure 1-2A positioning system includes a positioning platform 1, the upper end of which has a plurality of threaded mounting holes 2 arranged in an array, and four connecting seats 3. Each connecting seat 3 has a threaded connecting shaft 4 at its lower end that is threadedly connected to the threaded mounting holes 2. Each connecting seat 3 has a telescopic cylinder 5 at its upper end. Each telescopic cylinder 5 has a threaded adjusting shaft 6 that is threadedly connected to its telescopic shaft. Each threaded adjusting shaft 6 has a threaded adjusting sleeve 7 that is threadedly connected to its upper end. Each threaded adjusting sleeve 7 has a handheld positioning piece 8 that is positioned upwards.

[0025] Each threaded adjusting sleeve 7 is fitted with a rotating sleeve 9 that is rotatably connected to it. Each rotating sleeve 9 has a rotating hole 10 that is rotatably connected to the corresponding threaded adjusting sleeve 7. The rotation of each rotating sleeve 9 and the corresponding threaded adjusting sleeve 7 is damped, so that the rotation of the rotating sleeve 9 can drive the corresponding threaded adjusting sleeve 7 to rotate relative to the threaded adjusting shaft 6. Each threaded adjusting sleeve 7 has a rotating ring 11 on its outer side. Each rotating hole 10 has an annular connecting groove 12 that rotatably connects to the corresponding rotating ring 11 on its inner wall. Each rotating sleeve 9 is cut in half. The end of each rotating sleeve 9 away from the corresponding clamping block 14 has threaded connecting holes 13 on both sides of the corresponding threaded connecting sleeve. The two halves of the rotating sleeve 9 are connected to a whole by bolts through the threaded connecting holes 13. Each rotating sleeve 9 has an L-shaped clamping block 14 connected to one side. Each clamping block 14 has a rubber block 15 at its lower end.

[0026] Working principle: To adjust the position of the clamping block 14 according to the shape of the plastic workpiece to be processed, reconnect the multiple threaded connecting shafts 4 to the corresponding threaded mounting holes 2. According to the thickness of the plastic workpiece, the rotating sleeve 9 drives the threaded adjusting sleeve 7 to rotate relative to the threaded adjusting shaft 6, thereby adjusting the height of the clamping block 14. By holding the hand positioning piece 8 and rotating the clamping block 14, all the clamping blocks 14 can be rotated to press down on the plastic workpiece. When fixing the workpiece, first place the plastic workpiece in the middle of the positioning table 1, and then the telescopic cylinder 5 shortens to lower the clamping block 14 to clamp the edge of the plastic workpiece.

[0027] Example 2, refer to Figure 3-4A nut hot-pressing positioning device, based on a positioning system of Embodiment 1, has two mounting brackets 16 arranged upwards on the outer side of the positioning platform 1. Each mounting bracket 16 is equipped with a smart camera 17 facing downwards towards the positioning platform 1. The smart camera 17 captures images of the plastic workpiece on the positioning platform 1 to initially capture the position of the reserved hole. A longitudinal slide rail 18 is arranged on both sides above the positioning platform 1. A transverse slide rail 19 perpendicular to the two longitudinal slide rails 18 is connected between them. A longitudinal drive motor 20 is installed at one end of one longitudinal slide rail 18. A longitudinal threaded drive shaft 21 is rotatably connected within one longitudinal slide rail 18, and the power output shaft of the longitudinal drive motor 20 is connected to one end of the longitudinal threaded drive shaft 21. A limiting shaft 22 is arranged within the other longitudinal slide rail 18, and a longitudinal threaded connecting sleeve 23 threadedly connected to the longitudinal threaded drive shaft 21 and a limiting sleeve 24 slidably connected to the limiting shaft 22 are respectively provided at both ends of the transverse slide rail 19. A sliding positioning block 25 that slides along the length of the transverse slide rail 19 is slidably connected to it. A transverse drive motor 26 for driving the transverse sliding is installed at one end of the transverse slide rail 19. A transverse threaded drive shaft 27 that is set along the length of the transverse slide rail 19 is rotatably connected inside the transverse slide rail 19. The power output shaft of the transverse drive motor 26 is connected to one end of the transverse threaded drive shaft 27. The sliding positioning block 25 is provided with a transverse threaded connecting sleeve 28 that is threadedly connected to the transverse threaded drive shaft 27. A laser range sensor 29 is set downward on the sliding positioning block 25. The laser range sensor 29 senses the distance change by displacement. If the distance suddenly increases, it is determined that this is the position of the reserved hole.

[0028] Working principle: After the plastic workpiece is positioned and fixed on the positioning table 1, the intelligent camera 17 captures the position of the pre-drilled hole on the plastic workpiece on the positioning table 1. Then, the longitudinal drive motor 20 drives the transverse slide rail 19 to move longitudinally, and the transverse drive motor 26 drives the sliding positioning block 25 to move laterally, which drives the laser range sensor 29 to move arbitrarily above the plastic workpiece. The laser range sensor 29 moves to the corresponding position based on the position of the pre-drilled hole initially captured by the intelligent camera 17, and further determines the position of the pre-drilled hole through distance perception. This allows the robotic arm to more accurately determine the position of the pre-drilled hole, and enables the robotic arm to accurately press the nut gripped by the gripper into the pre-drilled hole.

[0029] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0030] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A positioning system, comprising a positioning platform (1), wherein the upper end of the positioning platform (1) is provided with a plurality of threaded mounting holes (2) arranged in an array, characterized in that, It also includes multiple connecting seats (3), each connecting seat (3) has a threaded connecting shaft (4) at its lower end that is threadedly connected to the threaded mounting hole (2), each connecting seat (3) has a telescopic cylinder (5) at its upper end, each telescopic cylinder (5) has a threaded adjusting shaft (6) at its telescopic shaft, each threaded adjusting shaft (6) is threadedly connected to a threaded adjusting sleeve (7), each threaded adjusting sleeve (7) has a handheld positioning piece (8) at its upper end, each threaded adjusting sleeve (7) has a rotating sleeve (9) rotatably connected to it, each rotating sleeve (9) has a rotating hole (10) rotatably connected to the corresponding threaded adjusting sleeve (7), each rotating sleeve (9) and the corresponding threaded adjusting sleeve (7) have damping in their rotation, so that the rotation of the rotating sleeve (9) can drive the corresponding threaded adjusting sleeve (7) to rotate relative to the corresponding threaded adjusting shaft (6), and each rotating sleeve (9) has an L-shaped clamping block (14) connected to one side.

2. The positioning system according to claim 1, characterized in that, Each threaded adjusting sleeve (7) has a rotating ring (11) on its outer side, and each rotating hole (10) has an annular connecting groove (12) on its inner wall that is rotatably connected to the corresponding rotating ring (11).

3. A positioning system according to claim 2, characterized in that, Each rotating sleeve (9) is cut in half. Each rotating sleeve (9) has a threaded connection hole (13) on both sides of the corresponding threaded connection sleeve at the end away from the corresponding clamping block (14). The two halves of the rotating sleeve (9) are connected as a whole by the connection of the threaded connection hole (13) and the bolt.

4. A positioning system according to claim 1, characterized in that, Each clamping block (14) has a rubber clamping block (15) at its lower end.

5. A nut hot-pressing positioning device, based on the positioning system according to any one of claims 1-4, characterized in that, Multiple mounting brackets (16) are provided on the outer side of the positioning platform (1) and each mounting bracket (16) is equipped with a smart camera (17) facing downwards towards the positioning platform (1). Longitudinal slide rails (18) are provided on both sides above the positioning platform (1). A transverse slide rail (19) perpendicular to the two longitudinal slide rails (18) is connected between them. A longitudinal drive motor (20) for driving the transverse slide rail (19) to slide along its length direction is installed on the longitudinal slide rail (18). A sliding positioning block (25) that slides along its length direction is slidably connected on the transverse slide rail (19). A transverse drive motor (26) for driving its transverse sliding is installed on the transverse slide rail (19). A laser range sensor (29) is provided downwards on the sliding positioning block (25).

6. A nut hot-pressing positioning device according to claim 5, characterized in that, One of the longitudinal slide rails (18) is rotatably connected to a longitudinal threaded drive shaft (21) arranged along its length direction. The power output shaft of the longitudinal drive motor (20) is connected to one end of the longitudinal threaded drive shaft (21). The other longitudinal slide rail (18) is provided with a limiting shaft (22) arranged along its length direction. The two ends of the transverse slide rail (19) are respectively provided with a longitudinal threaded connecting sleeve (23) threadedly connected to the longitudinal threaded drive shaft (21) and a limiting sliding sleeve (24) slidably connected to the limiting shaft (22).

7. A nut hot-pressing positioning device according to claim 5, characterized in that, The transverse slide rail (19) is rotatably connected to a transverse threaded drive shaft (27) arranged along its length direction. The power output shaft of the transverse drive motor (26) is connected to one end of the transverse threaded drive shaft (27). The sliding positioning block (25) is provided with a transverse threaded connecting sleeve (28) that is threadedly connected to the transverse threaded drive shaft (27).

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