Hot-pressing nut jig

Abstract

The utility model discloses a hot-pressing nut jig which comprises a working table, a supporting bottom plate is arranged on the upper end face of the working table, a positioning column is installed on the upper end face of the supporting bottom plate, the positioning column is composed of three cylinders, the diameters of the cylinders are sequentially increased from bottom to top, and the positioning column comprises an installation portion, a limiting portion and a positioning portion from bottom to top. The bottom of the mounting part is connected with the supporting bottom plate, the limiting part is used for limiting the downward pressing distance of a nut body, the nut body is placed on the top of the positioning part, a rack is arranged above the workbench, a lifting air cylinder is mounted on the rack, an output shaft of the lifting air cylinder is vertically downward, and a base plate is connected to the end of the output shaft of the lifting air cylinder; a positioning column is arranged on the lower end face of the base plate, a hot pressing head corresponding to the positioning column is arranged on the lower end face of the base plate, and a calibration mechanism used for calibrating the nut body is arranged at the position, located on the outer side of the hot pressing head, of the bottom of the base plate. The assembling quality of products is improved, and the working efficiency is also improved.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing technology for nuts, specifically a hot pressing nut fixture. Background Technology

[0002] A nut body is a round, threaded metal part used to connect parts with bolts or screws. However, traditional nut bodies may not provide sufficient fixing force when dealing with soft materials such as plastics. Therefore, thermo-pressed nut bodies have been developed. They are embedded into soft materials under high temperature and pressure to form a stable connection. They are particularly suitable for fields such as automotive and home appliance manufacturing, effectively improving connection strength and durability.

[0003] In existing hot-press nut body fixture operations, the nut body is usually placed directly on top of the workpiece, and then the hot press head performs heating and extrusion processes to make the nut body firmly embedded in the workpiece. However, due to the lack of a mechanism for preliminary correction of the nut body position, once the operator makes a deviation when placing the nut body, it will directly affect the positional accuracy of the nut body after hot pressing. When the positional accuracy of the hot-pressed nut body is problematic, the nut body may not be able to be fully embedded to the predetermined depth, affecting its fixing effect and the stability of the overall structure. Secondly, the nut body positional deviation may cause difficulties in assembling with other components, or even make assembly impossible, thereby affecting the functionality and quality of the entire product. Utility Model Content

[0004] The purpose of this utility model is to provide a hot-pressed nut fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hot-pressing nut fixture includes a worktable with a supporting base plate on its upper surface. A positioning post is mounted on the upper surface of the supporting base plate. The positioning post consists of three cylinders with diameters increasing from bottom to top. From bottom to top, the positioning post comprises an installation part, a limiting part, and a positioning part. The bottom of the installation part is connected to the supporting base plate. The limiting part limits the downward pressing distance of the nut body. The nut body is placed on top of the positioning part. A frame is provided above the worktable, and a lifting cylinder is mounted on the frame. The output shaft of the lifting cylinder points vertically downward and is connected to a base plate at its end. A hot-pressing head corresponding to the positioning post is provided on the lower surface of the base plate. A calibration mechanism for calibrating the nut body is provided at the bottom of the base plate, outside the hot-pressing head.

[0007] Furthermore, the calibration mechanism includes a crossbeam disposed above the substrate, with limit posts vertically downward disposed at both ends of the crossbeam. The substrate is provided with limit holes corresponding to the two limit posts respectively. The limit posts extend downward through the limit holes and are provided with connecting rings at their ends. The limit posts can move up and down along the limit holes. The bottom of the connecting ring is symmetrically fixedly connected with U-shaped connecting blocks. Swing arms are rotatably connected in the grooves of the two connecting blocks. The bottom of the two swing arms is provided with calibration components that can cooperate with each other. The nut body is calibrated by merging the two calibration components.

[0008] Furthermore, each of the two calibration components has a symmetrically provided chamber for placing balls on its inner sidewall. The balls protrude from the opening of the chamber from the inner sidewall of the calibration component and can abut against the outer wall of the nut body.

[0009] Furthermore, symmetrical rotating rods are provided on both sides of the swing arm. The two rotating rods pass through the outer wall of the connecting block and are rotatably connected to the connecting block. Each of the two rotating rods is fitted with a torsion spring. One end of each torsion spring is connected to the rotating rod, and the other end is connected to the connecting block.

[0010] Furthermore, the calibration mechanism also includes an electric telescopic rod symmetrically installed on the top of the connecting ring. The output end of the electric telescopic rod is fixedly connected to a lifting ring. The bottom of the lifting ring is symmetrically provided with a U-shaped roller frame. A roller is rotatably connected to the groove of the roller frame, and the roller abuts against the outer wall of the swing arm.

[0011] Furthermore, the crossbeam has a guide hole at its center, and the base plate has a guide post corresponding to the guide hole. The guide post extends upward through the guide hole. A spring is provided between the crossbeam and the base plate. The spring is sleeved on the guide post, with one end fixedly connected to the upper end face of the base plate and the other end fixedly connected to the lower end face of the crossbeam.

[0012] The beneficial effects of this utility model are:

[0013] This invention involves inserting the workpiece into a positioning post, placing the nut body on top of the positioning post, and then activating the hot press head and lifting cylinder. The hot press head heats up, and the output end of the lifting cylinder drives the base plate to move the hot press head downwards. When it moves a certain distance, the calibration mechanism first calibrates the nut body to ensure that the nut body is accurately aligned with the through-hole of the workpiece, improving the positional accuracy of the hot press head and enabling the nut body to be accurately embedded in the workpiece. This not only improves the assembly quality of the product but also significantly increases work efficiency. Then, the base plate continues to drive the hot press head downwards until the hot press head abuts against the nut body. The hot press head heats the nut body and continues to move downwards to press the nut body into the workpiece. After the hot press is completed, the lifting cylinder drives the base plate and hot press head to reset, and the processed workpiece is removed.

[0014] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0015] Figure 1 : Overall structural diagram of this utility model.

[0016] Figure 2 : Connection structure diagram of the substrate and the supporting base plate of this utility model.

[0017] Figure 3 : Figure 2 Enlarged view of the structure of part A.

[0018] Figure 4 : Exploded view of the substrate and supporting base plate of this utility model.

[0019] Figure 5 : Connection structure diagram of the calibration mechanism, positioning column and nut body of this utility model.

[0020] Figure 6 : Figure 5 Enlarged view of the local B structure.

[0021] Figure 7 : Figure 5 Enlarged view of a local C-structure.

[0022] Reference numerals: 1. Workbench; 2. Frame; 3. Lifting cylinder; 4. Base plate; 5. Positioning post; 6. Hot press head; 7. Nut body; 8. Guide post; 9. Spring; 11. Support base plate; 41. Limiting hole; 42. Crossbeam; 43. Limiting post; 44. Connecting ring; 45. Connecting block; 46. Swing arm; 47. Calibration component; 48. Electric telescopic rod; 49. Lifting ring; 50. Roller frame; 51. Roller; 421. Guide hole; 461. Rotating rod; 462. Torsion spring; 471. Ball bearing. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please refer to Figure 1-7 ;

[0025] A hot-pressing nut fixture includes a worktable 1. A support base plate 11 is provided on the upper section of the worktable 1. A positioning post 5 is mounted on the upper end of the support base plate 11. The positioning post 5 is used for inserting a workpiece. The workpiece has a through-hole at its center. One end of the through-hole is used to insert the positioning post 5, and the other end is used to insert the nut body 7. The positioning post 5 consists of three cylinders with diameters increasing sequentially from bottom to top. From bottom to top, the positioning post 5 is a mounting part, a limiting part, and a positioning part. The bottom of the mounting part is connected to the support base plate 11. The limiting part is used to limit the downward pressing distance of the nut body 7. The top of the positioning part is used to place the nut body 7. A positioning part is provided above the worktable 1. The machine includes a frame 2, on which a lifting cylinder 3 is mounted. The output shaft of the lifting cylinder 3 is vertically downward and connected to a base plate 4 at its end. The lower end face of the base plate 4 is provided with a hot pressing head 6 corresponding to the positioning post 5. The hot pressing head 6 is used to heat and press down the nut body 7. The bottom of the base plate 4 is located outside the hot pressing head 6 and is provided with a calibration mechanism. The calibration mechanism can finely adjust the position of the nut body 7 before hot pressing to ensure that the nut body 7 is accurately aligned with the through-hole of the workpiece. This improves the positional accuracy of the nut body 7 during hot pressing, allowing the nut body 7 to be accurately embedded in the workpiece. This not only improves the assembly quality of the product but also significantly improves work efficiency.

[0026] Specifically, the workpiece is first inserted into the positioning post 5, and then the nut body 7 is placed on top of the positioning post 5. Then, the hot pressing head 6 and the lifting cylinder 3 are activated. The hot pressing head 6 heats up, and the output end of the lifting cylinder 3 drives the base plate 4 to move the hot pressing head 6 downward. When it moves down a certain distance, the calibration mechanism first calibrates the nut body 7 to ensure that it is accurately aligned with the through-hole of the workpiece. Then, the base plate 4 continues to drive the hot pressing head 6 to move down until the hot pressing head 6 abuts against the nut body 7. The hot pressing head 6 heats the nut body 7 and continues to move down to press the nut body 7 into the workpiece. After the hot pressing is completed, the lifting cylinder 3 drives the base plate 4 and the hot pressing head 6 to reset, and the processed workpiece is taken out.

[0027] In this embodiment, the calibration mechanism includes a crossbeam 42 disposed above the substrate 4. Limiting posts 43 are vertically downwardly disposed at both ends of the crossbeam 42. The substrate 4 has limiting holes 41 corresponding to the two limiting posts 43. The limiting posts 43 extend downward through the limiting holes 41 and have connecting rings 44 at their ends. The limiting posts 43 can move up and down along the limiting holes 41, preventing them from shifting during movement and ensuring the stability of the calibration mechanism. U-shaped connecting blocks 45 are symmetrically fixedly connected to the bottom of the connecting rings 44. Swing arms 46 are rotatably connected to the grooves of both connecting blocks 45. The bottoms of the two swing arms 46 are provided with features that can cooperate with each other. The calibration component 47 is used to correct the position of the nut body 7 by merging two calibration components 47. The inner sidewalls of the two calibration components 47 are symmetrically provided with chambers for placing balls 471. The balls 471 protrude from the opening of the chambers from the inner sidewalls of the calibration components 47 so as to contact the outer surface of the nut body 7 and ensure calibration accuracy. The calibration mechanism also includes an electric telescopic rod 48 symmetrically installed on the top of the connecting ring 44. The output end of the electric telescopic rod 48 is fixedly connected to a lifting ring 49. The bottom of the lifting ring 49 is symmetrically provided with a U-shaped roller frame 50. A roller 51 is rotatably connected to the groove of the roller frame 50. The roller 51 abuts against the outer sidewall of the swing arm 46.

[0028] Specifically, the output shaft of the lifting cylinder 3 drives the base plate 4 to move the hot press head 6 and the calibration mechanism downwards. When the calibration mechanism moves to the position where the calibration piece 47 corresponds to the nut body 7, the electric telescopic rod 48 operates, and its output shaft retracts, causing the lifting ring 49 and roller 51 to move downwards. This pushes the swing arm 46 and the calibration piece 47 at its bottom towards the nut body 7 until the ball bearings 471 on the calibration piece 47 are completely in contact with the outer wall of the nut body 7, thus completing the precise positioning of the nut body 7. After the nut body 7 is successfully calibrated, the base plate 4 continues to move downwards, causing the hot press head 6 to abut against the nut body 7, utilizing heat... The pressure head 6 heats the nut body 7 and presses it into the predetermined through hole. During the downward movement, if the movement of the calibration piece 47 is obstructed, the limiting post 43 will slide relative to the base plate 4 to ensure the smooth progress of the calibration and assembly process. At the same time, since the outer wall of the nut body 7 abuts against the ball 471 instead of the side wall of the calibration piece 47, the contact area between the ball 471 and the outer wall of the nut body 7 is small, and it can roll with the movement of the nut body 7, which greatly reduces the coefficient of friction between the two and constantly corrects the downward movement of the nut body 7 to prevent the nut body 7 from tilting, thus improving the installation efficiency and effect.

[0029] In this embodiment, two rotating rods 461 are symmetrically arranged on both sides of the swing arm 46. The two rotating rods 461 pass through the outer wall of the connecting block 45 and are rotatably connected to the connecting block 45. Each of the two rotating rods 461 is fitted with a torsion spring 462. One end of the two torsion springs 462 is connected to the rotating rod 461, and the other end is connected to the connecting block 45, providing a restoring force for the swing arm 46.

[0030] Specifically, when the electric telescopic rod 48 drives the lifting ring 49 to descend and the roller 51 pushes the swing arm 46 to move towards the nut body 7, the torsion spring 462 will twist and deform, storing elastic potential energy. After the nut body 7 is installed, the base plate 4 begins to reset, the electric telescopic rod 48 pushes the lifting ring 49 upward, and the roller frame 50 rises together with the lifting ring 49, thereby relieving the force of the roller 51 on the swing arm 46. At this time, the torsion spring 462 will release the previously stored elastic potential energy, so that the swing arm 46 automatically returns to the initial position, ensuring that the swing arm 46 is in the open state every time the nut body 7 is calibrated, without the need for manual opening.

[0031] In this embodiment, a guide hole 421 is provided at the center of the crossbeam 42, and a guide post 8 corresponding to the guide hole 421 is provided on the base plate 4. The guide post 8 extends upward through the guide hole 421 to guide the up and down movement of the crossbeam 42, further ensuring the stability of the calibration mechanism movement. A spring 9 is provided between the crossbeam 42 and the base plate 4. The spring 9 is sleeved on the guide post 8, with one end fixedly connected to the upper end face of the base plate 4 and the other end fixedly connected to the lower end face of the crossbeam 42. When the movement of the calibration component 47 is obstructed, the limiting post 43 will slide relative to the base plate 4, and the crossbeam 42 will also move together with the limiting post 43, thereby stretching the spring 9 and storing elastic potential energy. When the obstruction is removed, the spring 9 will release the stored elastic potential energy, helping the crossbeam 42 and the limiting post 43 to quickly reset, ensuring that the calibration mechanism can quickly return to the initial state.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A hot-pressing nut fixture, comprising a worktable (1), characterized in that, The upper surface of the workbench (1) is provided with a support base plate (11). A positioning column (5) is installed on the upper surface of the support base plate (11). The positioning column (5) is composed of three cylinders with diameters increasing from bottom to top. The positioning column (5) consists of an installation part, a limiting part, and a positioning part from bottom to top. The bottom of the installation part is connected to the support base plate (11). The limiting part is used to limit the downward pressing distance of the nut body (7). The nut body (7) is placed on the top of the positioning part. A frame (2) is provided above the workbench (1). A lifting cylinder (3) is installed on the frame (2). The output shaft of the lifting cylinder (3) is vertically downward and connected to a base plate (4) at its end. A hot press head (6) corresponding to the positioning column (5) is provided on the lower surface of the base plate (4). A calibration mechanism for calibrating the nut body (7) is provided on the bottom of the base plate (4) outside the hot press head (6).

2. The hot-pressing nut fixture according to claim 1, characterized in that, The calibration mechanism includes a crossbeam (42) set above the base plate (4). Limiting posts (43) are set vertically downward at both ends of the crossbeam (42). The base plate (4) is provided with limiting holes (41) corresponding to the two limiting posts (43). The limiting posts (43) extend downward through the limiting holes (41) and are provided with connecting rings (44) at their ends. The limiting posts (43) can move up and down along the limiting holes (41). The bottom of the connecting rings (44) is symmetrically fixedly connected with U-shaped connecting blocks (45). Swing arms (46) are rotatably connected in the grooves of the two connecting blocks (45). The bottom of the two swing arms (46) is provided with calibration components (47) that can cooperate with each other. The nut body (7) is calibrated by merging the two calibration components (47).

3. The hot-pressing nut fixture according to claim 2, characterized in that, Both of the calibration components (47) have symmetrically provided chambers for placing balls (471) on their inner sidewalls. The balls (471) protrude from the opening of the chamber from the inner sidewall of the calibration component (47) and can abut against the outer wall of the nut body (7).

4. The hot-pressing nut fixture according to claim 3, characterized in that, The swing arm (46) has symmetrical rotating rods (461) on both sides. The two rotating rods (461) pass through the outer wall of the connecting block (45) and are rotatably connected to the connecting block (45). Each of the two rotating rods (461) is fitted with a torsion spring (462). One end of each torsion spring (462) is connected to the rotating rod (461), and the other end is connected to the connecting block (45).

5. A hot-pressing nut fixture according to claim 4, characterized in that, The calibration mechanism also includes an electric telescopic rod (48) symmetrically installed on the top of the connecting ring (44). The output end of the electric telescopic rod (48) is fixedly connected to a lifting ring (49). The bottom of the lifting ring (49) is symmetrically provided with a U-shaped roller frame (50). A roller (51) is rotatably connected to the groove of the roller frame (50). The roller (51) abuts against the outer wall of the swing arm (46).

6. A hot-pressing nut fixture according to claim 2, characterized in that, The crossbeam (42) has a guide hole (421) at its center. The base plate (4) has a guide post (8) corresponding to the guide hole (421). The guide post (8) extends upward through the guide hole (421). A spring (9) is provided between the crossbeam (42) and the base plate (4). The spring (9) is sleeved on the guide post (8), with one end fixedly connected to the upper end face of the base plate (4) and the other end fixedly connected to the lower end face of the crossbeam (42).

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