Pressing device and pressing method for controlling tightness of expansion mandrel

Abstract

The invention discloses a pressing device and method for controlling tightness of an expansion mandrel, and relates to the technical field of coil manufacturing, the pressing device comprises a three-axis air cylinder, a fixed adapter plate, a first driving assembly, a connecting rod assembly and a spacing pressing sleeve, and the three-axis air cylinder is slidably connected to a base; the fixed adapter plate is mounted on the three-axis cylinder; the first driving assembly is mounted on the fixed adapter plate; the connecting rod assembly comprises a shifting rod pin with one end hinged to the first driving assembly, a rotating base fixedly installed on one side of the fixed adapter plate and a movable center hinged to the end, away from the first driving assembly, of the shifting rod pin. The movable center and the three-axis air cylinder are located on the two sides of the fixed adapter plate correspondingly. The interval pressing sleeve is vertically connected to the side, away from the three-axis air cylinder, of the fixed adapter plate, and a center shaft of the three-axis air cylinder is suitable for pushing the movable center to slide in the interval pressing sleeve and further abuts against the center of the end of the mandrel pull rod. According to the pressing method, the production efficiency and the product quality are improved, and personal errors are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of coil manufacturing equipment, and in particular to a pressing device and a pressing method for controlling the tightness of an expansion core shaft. Background Art

[0002] Expansion mandrels are often used in the electromagnetic coil winding process. Installation of these mandrels often requires auxiliary positioning devices to ensure the coaxiality of the inner and outer diameters of the product. For example, due to the large mass and high torque transmitted by expansion mandrels, deformation of the mandrel's clamping area can easily lead to failure of the auxiliary positioning device.

[0003] The Chinese utility model patent with publication number CN203449055U discloses an expansion type axial locator, including a threaded shaft, a positioning rod inserted into one end of the threaded shaft, the positioning rod and the threaded shaft are fixed by a first nut, the outer circumference of the threaded shaft is sleeved with a tapered shaft, the outer circumference of the tapered shaft is sleeved with an expansion sleeve, the outer circumference of the tapered shaft is provided with an adjustment second nut for adjusting and fixing the expansion sleeve, and the outer circumference of the threaded shaft is provided with a third nut for adjusting and fixing the tapered shaft and the threaded shaft. This technical solution adopts a threaded connection between the positioning rod and the threaded shaft, determines the length of the positioning rod according to the requirements of the processing size, and uses the expansion sleeve to expand and fix it, so as to quickly, conveniently and accurately complete the positioning and clamping of the CNC lathe spring chuck, realize the axial positioning of the workpiece, and ensure the axial positioning accuracy of the workpiece during the processing. Moreover, only the workpiece clamping tooling needs to be considered, and the positioning problem is no longer considered, which increases the versatility of the tooling and reduces the variety, quantity and production of auxiliary tooling. However, although the above technical solution realizes the positioning of parts, the parts are large in size, resulting in limited scope of application. At the same time, the device has fewer support points, resulting in concentrated force. During the machine tool processing, the parts are very likely to slide, affecting the processing quality. When processing longer sleeve-type parts, since they are only tightened by the tailstock center, the clamping contact area between the workpiece and the center is small, which is prone to shaking and cannot guarantee the smoothness of the processing, thereby affecting the processing accuracy of the product. Summary of the Invention

[0004] In view of this, in order to solve the defects of the above-mentioned technology, the present invention provides a pressing device and a pressing method for controlling the tightness of an expansion mandrel.

[0005] The technical solutions of the present invention are as follows: The first object of the present invention is to provide a clamping device for controlling the tightness of an expansion mandrel, comprising: Three-axis cylinder, slidingly connected to the base; A fixed adapter plate is mounted on the three-axis cylinder; A first drive assembly is mounted on the fixed adapter plate; A connecting rod assembly includes a lever pin hingedly connected at one end to the first drive assembly, a rotating seat fixedly mounted on one side of the fixed adapter plate, and a moving top hingedly connected to the end of the lever pin away from the first drive assembly, wherein the moving top and the three-axis cylinder are respectively located on both sides of the fixed adapter plate; A spacing clamping sleeve is vertically connected to the side of the fixed adapter plate facing away from the three-axis cylinder, and the central output shaft of the three-axis cylinder is suitable for passing through the fixed adapter plate and extending into the interior of the spacing clamping sleeve to push the moving top to slide in the spacing clamping sleeve, thereby allowing the moving top to extend out of the outside of the spacing clamping sleeve and press on the end center of the core shaft pull rod.

[0006] Optionally, the three-axis cylinder includes a cylinder transition plate, a three-axis cylinder body connected to the upper surface of the cylinder transition plate, and two cylinder adjustment blocks installed on both sides of the three-axis cylinder body, and the cylinder adjustment blocks are suitable for adjusting the three-axis cylinder body to slide in the moving groove of the cylinder transition plate.

[0007] Optionally, the fixed adapter plate includes a first straight plate and a second straight plate vertically connected to each other, the first straight plate is located directly above the three-axis cylinder body, the second straight plate is vertically arranged between the central output shaft of the three-axis cylinder body and the spacing compression sleeve, and the second straight plate is provided with a first center hole coaxial with the spacing compression sleeve at the output shaft of the three-axis cylinder.

[0008] Optionally, the first driving assembly includes a first driving cylinder fixedly connected to the upper surface of the first straight plate through a mounting bracket and a Y-shaped joint installed on the output shaft of the first driving cylinder, and the notch portion of the Y-shaped joint is located at the end away from the first driving cylinder.

[0009] Optionally, the spacing compression sleeve includes a first sleeve, a mounting plate and a second sleeve coaxially connected in sequence, the first sleeve is suitable for being inserted into the first center hole, the mounting plate is suitable for being threadedly connected to the second straight plate, and the second sleeve is suitable for accommodating the movable top.

[0010] Optionally, the inner diameters of the first sleeve, the mounting plate and the second sleeve are the same, the outer diameter of the mounting plate is larger than the outer diameter of the second sleeve, the first sleeve is suitable for accommodating the central output shaft of the three-axis cylinder body, and the surface of the second sleeve is provided with a first through groove running through it from top to bottom, and the end of the lever pin away from the Y-shaped joint is suitable for being inserted into the first through groove and being hinged to the movable top located in the second sleeve.

[0011] Optionally, a second through-groove corresponding to the position of the first through-groove is formed on the movable top, and the end of the shifting rod pin is suitable for being rotatably mounted in the second through-groove.

[0012] Optionally, the rotating seat is horizontally connected to a side of the second straight plate facing away from the three-axis cylinder, and the rotating seat is located directly above the mounting plate and the second sleeve.

[0013] Optionally, the rotating seat includes a rotating seat body and a rotating shaft mounted on the rotating seat body, and the rotating shaft is suitable for being inserted into the shift rod pin to provide rotational support for the connecting rod assembly.

[0014] A second object of the present invention is to provide a method for controlling the tightness of an expansion mandrel, using the above-mentioned device for controlling the tightness of an expansion mandrel, the method comprising the steps of: The relative displacement of the three-axis cylinder body relative to the core shaft pull rod is adjusted through the cylinder adjustment block and the cylinder transition plate; The three-axis cylinder body moves, driving the spacing compression sleeve to move closer to the core shaft pull rod; The first drive assembly works to drive the connecting rod assembly to rotate, thereby pushing the moving top to slide in the spacing and pressing sleeve, so that the moving top extends out of the spacing and pressing sleeve and presses into the center hole at the end of the core shaft pull rod; The movement stroke of the three-axis cylinder body and the first driving cylinder is controlled to adjust the top pressure tightness of the core shaft pull rod in the expansion core shaft.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The clamping device for controlling the tightness of the expansion core shaft in the present invention is composed of a three-axis cylinder, a fixed adapter plate, a first drive assembly, a connecting rod assembly and a spacing compression sleeve, wherein the three-axis cylinder is slidably connected to the base for achieving precise positioning and stable operation, and the three-axis cylinder has a compact structure and occupies a small space, and can be flexibly arranged according to needs to improve the space utilization of the clamping device; the fixed adapter plate is installed on the three-axis cylinder, so that the fixed adapter plate is driven by the three-axis cylinder to ensure the stability and accuracy of the remaining connecting components and reduce errors and jitters during movement; the first drive assembly is installed on the fixed adapter plate, and driven by the fixed adapter plate, the first drive assembly can also move relative to the three-axis cylinder. The connecting rod assembly consists of a lever pin, a rotating seat, and a moving top, wherein one end of the lever pin is hingedly connected to the first drive assembly, and the other end is hingedly connected to the end of the moving top away from the first drive assembly. The rotating seat is fixedly mounted on one side of the fixed adapter plate and is located between the first drive assembly and the moving top. The moving top and the three-axis cylinder are respectively located on both sides of the fixed adapter plate, so that the rotating seat can provide a fulcrum for the lever pin, enabling it to rotate around the rotating seat. The spacing clamping sleeve is used to provide a stable guide and support structure for the moving top, ensuring the precise movement of the moving top. The spacing clamping sleeve is vertically connected to the side of the fixed adapter plate away from the three-axis cylinder. The central output shaft of the three-axis cylinder is suitable for passing through the fixed adapter plate and extending into the interior of the spacing clamping sleeve to push the moving top to slide in the spacing clamping sleeve, thereby causing the moving top to extend out of the spacing clamping sleeve and be suitable for pressing against the end center of the core shaft pull rod.

[0016] 2. The multi-degree-of-freedom motion and high-precision control capabilities of the three-axis cylinder ensure that the fixed adapter plate and the first drive assembly thereon can achieve precise positioning and stable operation. The central output shaft of the three-axis cylinder passes through the fixed adapter plate and extends into the interior of the spacing compression sleeve to push the moving top to slide in the spacing compression sleeve, further improving the positioning accuracy.

[0017] 3. The spacing compression sleeve provides a stable guide and support structure for the moving top, ensuring the linear motion accuracy of the moving top, reducing errors and jitters during the movement, and thus achieving high-precision pressing action.

[0018] 4. The fixed adapter plate is mounted on the three-axis cylinder, ensuring the stability and accuracy of the first drive assembly, reducing errors and jitter during movement, and improving the reliability of the entire device. The rotating base is fixed to one side of the fixed adapter plate, providing a fulcrum for the shifting pin, allowing it to rotate around the rotating base. This design ensures the transmission stability and reliability of the shifting pin, reducing wear and failure during transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1Schematic diagram of the structure of a clamping device for controlling the tightness of an expansion mandrel in an embodiment of the present invention; Figure 2 Schematic diagram of the exploded structure of the three-axis cylinder, fixed adapter plate, first drive assembly and connecting rod assembly in an embodiment of the present invention; Figure 3 Schematic diagram of the assembly structure of the first drive assembly and the connecting rod assembly in an embodiment of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the first drive assembly and the connecting rod assembly in an embodiment of the present invention; Figure 5 Schematic diagram of the assembly structure of the clamping device and the core shaft pull rod for controlling the tightness of the expansion core shaft in an embodiment of the present invention.

[0020] Description of reference numerals: 1-Three-axis cylinder; 11-three-axis cylinder body; 12-cylinder transition plate; 13-cylinder adjustment block; 2-Fix the adapter plate; 21-first straight plate; 22-second straight plate; 221-first center hole; 3-first drive assembly; 31-first driving cylinder; 311-mounting frame; 32-Y-type connector; 4-Connecting rod assembly; 41 - lever pin; 42 - rotating seat; 421 - rotating seat body; 422 - rotating shaft; 43 - moving top; 431 - second through groove.

[0021] 5- spacing compression sleeve; 51- first sleeve; 52- mounting plate; 53- second sleeve; 531- first through groove; 6- Mandrel pull rod. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] Figure 1-5 The figure shows a clamping device for controlling the tightness of an expansion mandrel provided by an embodiment of the present invention. The clamping device includes a three-axis cylinder 1, a fixed adapter plate 2, a first drive assembly 3, a connecting rod assembly 4, and a spacing compression sleeve 5, wherein: The three-axis cylinder 1 is slidably connected to the base (not shown in the accompanying drawings) to achieve precise positioning and stable operation. The three-axis cylinder 1 has a compact structure and occupies a small space. It can be flexibly arranged according to needs to improve the space utilization of the clamping device. The fixed adapter plate 2 is installed on the three-axis cylinder 1, so that the fixed adapter plate 2 can ensure the stability and accuracy of the remaining connecting parts under the drive of the three-axis cylinder 1, and reduce errors and jitters during the movement process. The first drive component 3 is installed on the fixed adapter plate 2, and under the drive of the fixed adapter plate 2, the first drive component 3 can also move relative to the three-axis cylinder 1.

[0024] The connecting rod assembly 4 includes a shift rod pin 41, a rotating seat 42 and a movable top 43, wherein one end of the shift rod pin 41 is hingedly connected to the first drive assembly 3, and the other end is hingedly connected to the end of the movable top 43 away from the first drive assembly 3. The rotating seat 42 is fixedly mounted on one side of the fixed adapter plate 2 and is located between the first drive assembly 3 and the movable top 43. The movable top 43 and the three-axis cylinder 1 are respectively located on both sides of the fixed adapter plate 2, so that the rotating seat 42 can provide a fulcrum for the shift rod pin 41 so that it can rotate around the rotating seat 42.

[0025] The spacing clamping sleeve 5 is used to provide a stable guide and support structure for the moving top 43 to ensure the precise movement of the moving top 43. In this embodiment, the spacing clamping sleeve 5 is vertically connected to the side of the fixed adapter plate 2 away from the three-axis cylinder 1. The central output shaft of the three-axis cylinder 1 is suitable for passing through the fixed adapter plate 2 and extending into the interior of the spacing clamping sleeve 5 to push the moving top 43 to slide in the spacing clamping sleeve 5, thereby making the moving top 43 extend out of the spacing clamping sleeve 5 and suitable for pressing on the end center of the core shaft pull rod 6.

[0026] Specifically, in the embodiment of the present invention, the multi-degree-of-freedom motion and high-precision control capabilities of the three-axis cylinder 1 ensure that the fixed adapter plate 2 and the first drive assembly 3 thereon can achieve precise positioning and stable operation; the central output shaft of the three-axis cylinder 1 passes through the fixed adapter plate 2 and extends into the interior of the spacing clamping sleeve 5, which is used to push the moving top 43 to slide within the spacing clamping sleeve 5, further improving the accuracy of positioning. The spacing clamping sleeve 5 provides a stable guide and support structure for the moving top 43, ensuring the linear motion accuracy of the moving top 43, reducing errors and jitter during motion, and thus achieving high-precision pressing action; the fixed adapter plate 2 is installed on the three-axis cylinder 1, ensuring the stability and accuracy of the first drive assembly 3, reducing errors and jitter during motion, and improving the reliability of the entire device; the rotating seat 42 is fixedly installed on one side of the fixed adapter plate 2, providing a fulcrum for the shifting rod pin 41, enabling it to rotate around the rotating seat 42. This design ensures the transmission stability and reliability of the shifting rod pin 41 and reduces wear and failure during transmission.

[0027] The automated control of the three-axis cylinder 1 and the first drive assembly 3 reduces manual intervention, improves production efficiency and product quality, ensures the accuracy and repeatability of each movement, and reduces human error. The design of the connecting rod assembly 4 enables the entire device to flexibly adjust movement direction and position to adapt to a variety of tasks, improving the versatility and adaptability of the equipment.

[0028] Therefore, the clamping device realizes high-precision and high-stability multi-degree-of-freedom motion through the coordinated work of the three-axis cylinder 1, the fixed adapter plate 2, the first drive assembly 3, the connecting rod assembly 4 and the spacing clamping sleeve 5. It is suitable for a variety of automation application scenarios and improves production efficiency and product quality.

[0029] For further information, see Figure 1 、 2 As shown, the three-axis cylinder 1 includes a three-axis cylinder body 11, a cylinder transition plate 12, and two cylinder adjustment blocks 13. The three-axis cylinder body 11 is connected to the upper surface of the cylinder transition plate 12, and the two cylinder adjustment blocks 13 are installed on both sides of the three-axis cylinder body 11. The movable groove on the cylinder transition plate 12 provides a sliding path for the three-axis cylinder body 11. The cylinder adjustment blocks 13 are suitable for adjusting the sliding of the three-axis cylinder body 11 within the movable groove of the cylinder transition plate 12. During the installation and commissioning process, the position of the three-axis cylinder body 11 is fine-tuned to ensure its precise alignment and positioning. The cylinder adjustment blocks 13 can achieve precise lateral and longitudinal adjustment by cooperating with the movable groove, ensuring that the central output shaft of the three-axis cylinder body 11 can accurately pass through the fixed adapter plate 2 and extend into the interior of the spacing compression sleeve 5.

[0030] During installation, the adjustment of cylinder adjustment block 13 ensures that the central output shaft of the three-axis cylinder body 11 accurately passes through the fixed adapter plate 2 and extends into the interior of the spacing compression sleeve 5. The fine-tuning function of cylinder adjustment block 13 ensures the precise alignment and positioning of the three-axis cylinder body 11, reducing installation errors. Supported by cylinder transition plate 12, the three-axis cylinder body 11 can achieve multi-degree-of-freedom movement. The stability of cylinder adjustment block 13 ensures the smooth and reliable movement of the three-axis cylinder body 11, reducing errors and jitter during movement.

[0031] For further information, see Figure 1 、 2 As shown, the fixed adapter plate 2 includes a first straight plate 21 and a second straight plate 22 that are vertically connected to each other. The first straight plate 21 is located directly above the three-axis cylinder body 11, providing a stable installation platform for the first drive component 3. The second straight plate 22 is vertically arranged between the central output shaft of the three-axis cylinder body 11 and the spacing compression sleeve 5, and the second straight plate 22 is provided with a first center hole 221 coaxial with the spacing compression sleeve 5 at the output shaft of the three-axis cylinder 1, so that the central output shaft of the three-axis cylinder 1 slides in the first center hole 221, pushing the moving top 43 to slide in the spacing compression sleeve 5.

[0032] Thus, the first straight plate 21 and the second straight plate 22 are vertically connected to each other to form a stable T-shaped structure, so that the fixed adapter plate 2 can adapt to different installation positions and working requirements. This design not only improves the flexibility of the device, but also increases its adaptability.

[0033] For further information, see Figure 1 、 2 As shown in Figure 3, the first drive assembly 3 includes a first drive cylinder 31 and a Y-type joint 32, wherein the first drive cylinder 31 is fixedly connected to the upper surface of the first straight plate 21 through a mounting bracket 311, and the Y-type joint 32 is mounted on the output shaft of the first drive cylinder 31, and the notch portion of the Y-type joint 32 is located at the end away from the first drive cylinder 31, so that the lever pin 41 can be flexibly hinged and connected, thereby reducing wear and failure during the transmission process, improving the stability and reliability of the transmission, and ensuring the long-term operation stability of the entire device.

[0034] When the output shaft of the first drive cylinder 31 pushes the Y-joint 32, the notch of the Y-joint 32 hinges with one end of the lever pin 41, achieving precise transmission. Driven by the Y-joint 32, the lever pin 41 rotates around the rotating seat 42, pushing the moving tip 43 to slide within the spacing and compression sleeve 5.

[0035] For further information, see Figure 1 、 2As shown in Figures 4 and 5, the spacing compression sleeve 5 includes a first sleeve 51, a mounting plate 52 and a second sleeve 53 that are coaxially connected in sequence. The first sleeve 51 is suitable for being inserted into the first center hole 221, the mounting plate 52 is suitable for being threadedly connected to the second straight plate 22, and the second sleeve 53 is suitable for accommodating the moving top 43.

[0036] Specifically, the first sleeve 51 is adapted to be inserted into the first center hole 221, ensuring precise alignment of the spacing compression sleeve 5 with the central output shaft of the three-axis cylinder 1, reducing installation errors and ensuring the linearity and stability of the movable tip 43 during movement. The mounting plate 52 is adapted to be threaded onto the second straight plate 22, ensuring the stability and reliability of the spacing compression sleeve 5 on the fixed adapter plate 2, facilitating installation and adjustment, and reducing installation time and costs. The second sleeve 53 is adapted to accommodate the movable tip 43, providing a stable guide and support structure, ensuring the precise movement of the movable tip 43, reducing errors and jitter during movement, and improving the accuracy and stability of the entire device.

[0037] For further information, see Figure 1 、 2 As shown in Figures 4 and 5, the inner diameters of the first sleeve 51, the mounting plate 52 and the second sleeve 53 are the same, the outer diameter of the mounting plate 52 is larger than the outer diameter of the second sleeve 53, the first sleeve 51 is suitable for accommodating the central output shaft of the three-axis cylinder body 11, and the surface of the second sleeve 53 is provided with a first through groove 531 running through it from top to bottom. The end of the lever pin 41 away from the Y-type joint 32 is suitable for being inserted into the first through groove 531 and is hinged to the moving top 43 located in the second sleeve 53.

[0038] In this embodiment, the inner diameters of the first sleeve 51, mounting plate 52, and second sleeve 53 are identical, ensuring the coaxiality and consistency of the entire spacing compression sleeve 5, reducing installation errors, and ensuring the linearity and stability of the movable top 43 during movement. The first sleeve 51 is suitable for accommodating the central output shaft of the three-axis cylinder body 11, ensuring that the central output shaft of the three-axis cylinder 1 can accurately pass through the first center hole 221 and extend into the interior of the spacing compression sleeve 5, achieving precise alignment and positioning. The outer diameter of the mounting plate 52 is larger than the outer diameter of the second sleeve 53, providing a larger contact area and a more stable fixing point, ensuring the stability and reliability of the spacing compression sleeve 5 on the fixed adapter plate 2, and reducing failures caused by vibration and impact. The surface of the second sleeve 53 is provided with a first through-groove 531 extending vertically. The end of the lever pin 41 away from the Y-joint 32 is suitable for insertion into the first through-groove 531 and articulated with the movable top 43 located in the second sleeve 53. This design ensures the flexible movement of the shifting rod pin 41, reduces wear and failure during the transmission process, and improves the long-term operation stability of the device.

[0039] For further information, see Figure 3 、4 As shown, the movable tip 43 is provided with a second through-slot 431 corresponding to the first through-slot 531, and the end of the lever pin 41 is rotatably mounted in the second through-slot 431. This allows the end of the lever pin 41 to be accurately inserted and rotatably mounted in the second through-slot 431, thereby reducing installation errors and ensuring precise alignment and connection between the lever pin 41 and the movable tip 43.

[0040] Therefore, the rotating installation design of the second through groove 431 on the movable top 43 and the end of the lever pin 41 not only improves the accuracy and stability of the device, but also increases the flexibility and adaptability of the device, making installation and maintenance easier, suitable for a variety of automation application scenarios, and improving production efficiency and product quality.

[0041] For further information, see Figure 3 、 4 As shown, the rotating seat 42 is horizontally connected to the side of the second straight plate 22 facing away from the three-axis cylinder 1, and the rotating seat 42 is located directly above the mounting plate 52 and the second sleeve 53.

[0042] Optionally, the rotating seat 42 includes a rotating seat body 421 and a rotating shaft 422 . The rotating shaft 422 is mounted on the rotating seat body 421 , and the rotating shaft 422 is suitable for being inserted into the shift rod pin 41 to provide rotational support for the connecting rod assembly 4 .

[0043] An embodiment of the present invention further provides a method for controlling the tightness of an expansion mandrel, using the above-mentioned device for controlling the tightness of an expansion mandrel. The method comprises the following steps: The relative displacement of the three-axis cylinder body 11 relative to the core shaft pull rod 6 is adjusted by the cylinder adjustment block 13 and the cylinder transition plate 12; The three-axis cylinder body 11 moves to drive the spacing compression sleeve 5 to move closer to the core shaft pull rod 6; The first drive assembly 3 works, driving the connecting rod assembly 4 to rotate, thereby pushing the movable top 43 to slide in the spacing and pressing sleeve 5, so that the movable top 43 extends out of the spacing and pressing sleeve 5 and presses against the center hole at the end of the core shaft pull rod 6; The movement strokes of the three-axis cylinder body 11 and the first driving cylinder 31 are controlled to adjust the pressing tightness of the core shaft pull rod in the expansion core shaft.

[0044] This clamping method adjusts the relative displacement of the three-axis cylinder body 11 relative to the core shaft pull rod 6 through the cylinder adjustment block 13 and the cylinder transition plate 12 to ensure that the central output shaft of the three-axis cylinder body 11 can be accurately aligned with the end center hole of the core shaft pull rod 6. The three-axis cylinder body 11 moves, driving the spacing clamping sleeve 5 to approach the core shaft pull rod 6, ensuring the precise alignment of the spacing clamping sleeve 5 and the core shaft pull rod 6. The first drive assembly 3 works, driving the connecting rod assembly 4 to rotate, and then pushing the moving top 43 to slide in the spacing clamping sleeve 5. The moving top 43 extends out of the spacing clamping sleeve 5 and presses against the end center hole of the core shaft pull rod 6 to achieve precise pressing. The movement stroke of the three-axis cylinder body 11 and the first drive cylinder 31 is controlled to adjust the pressing tightness of the core shaft pull rod in the expansion core shaft. This design ensures precise control of the pressing force and adapts to different work requirements.

[0045] This compaction method not only improves the accuracy and stability of the device, but also increases the flexibility and adaptability of the device, making installation and maintenance easier. It is suitable for a variety of automation application scenarios and improves production efficiency and product quality.

[0046] Although the present invention is disclosed as above, the scope of protection disclosed by the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A clamping device for controlling the tightness of an expansion mandrel, characterized in that: include: Three-axis cylinder, slidingly connected to the base; A fixed adapter plate is mounted on the three-axis cylinder; A first drive assembly is mounted on the fixed adapter plate; A connecting rod assembly includes a lever pin hingedly connected at one end to the first drive assembly, a rotating seat fixedly mounted on one side of the fixed adapter plate, and a moving top hingedly connected to the end of the lever pin away from the first drive assembly, wherein the moving top and the three-axis cylinder are respectively located on both sides of the fixed adapter plate; A spacing clamping sleeve is vertically connected to the side of the fixed adapter plate facing away from the three-axis cylinder, and the central output shaft of the three-axis cylinder is suitable for passing through the fixed adapter plate and extending into the interior of the spacing clamping sleeve to push the moving top to slide in the spacing clamping sleeve, thereby allowing the moving top to extend out of the spacing clamping sleeve to press on the end center of the core shaft pull rod.

2. The clamping device for controlling the tightness of the expansion mandrel according to claim 1, characterized in that: The three-axis cylinder includes a cylinder transition plate, a three-axis cylinder body connected to the upper surface of the cylinder transition plate, and two cylinder adjustment blocks installed on both sides of the three-axis cylinder body. The cylinder adjustment blocks are suitable for adjusting the three-axis cylinder body to slide in the moving groove of the cylinder transition plate.

3. The clamping device for controlling the tightness of the expansion mandrel according to claim 1, characterized in that: The fixed adapter plate includes a first straight plate and a second straight plate vertically connected to each other, the first straight plate is located directly above the three-axis cylinder body, the second straight plate is vertically arranged between the central output shaft of the three-axis cylinder body and the spacing compression sleeve, and the second straight plate is provided with a first center hole coaxial with the spacing compression sleeve at the output shaft of the three-axis cylinder.

4. The clamping device for controlling the tightness of the expansion mandrel according to claim 3, characterized in that: The first driving assembly includes a first driving cylinder fixedly connected to the upper surface of the first straight plate through a mounting bracket and a Y-shaped joint installed on the output shaft of the first driving cylinder, and the notch portion of the Y-shaped joint is located at the end away from the first driving cylinder.

5. The clamping device for controlling the tightness of the expansion mandrel according to claim 4, characterized in that: The spacing compression sleeve includes a first sleeve, a mounting plate and a second sleeve coaxially connected in sequence, the first sleeve is suitable for being inserted into the first center hole, the mounting plate is suitable for being threadedly connected to the second straight plate, and the second sleeve is suitable for accommodating the moving top.

6. The clamping device for controlling the tightness of the expansion mandrel according to claim 5, characterized in that: The inner diameters of the first sleeve, the mounting plate and the second sleeve are the same, the outer diameter of the mounting plate is larger than the outer diameter of the second sleeve, the first sleeve is suitable for accommodating the central output shaft of the three-axis cylinder body, and the surface of the second sleeve is provided with a first through groove running through it from top to bottom, and the end of the lever pin away from the Y-shaped joint is suitable for being inserted into the first through groove and hinged to the movable top located in the second sleeve.

7. The clamping device for controlling the tightness of the expansion mandrel according to claim 6, characterized in that: The movable top is provided with a second through-groove corresponding to the position of the first through-groove, and the end of the shifting rod pin is rotatably mounted in the second through-groove.

8. The clamping device for controlling the tightness of the expansion mandrel according to claim 5, characterized in that: The rotating seat is horizontally connected to a side of the second straight plate facing away from the three-axis cylinder, and the rotating seat is located directly above the mounting plate and the second sleeve.

9. The clamping device for controlling the tightness of the expansion mandrel according to claim 1, characterized in that: The rotating seat includes a rotating seat body and a rotating shaft installed on the rotating seat body, and the rotating shaft is suitable for being inserted into the shift rod pin to provide rotation support for the connecting rod assembly.

10. A method for controlling the tightness of an expansion mandrel, using the device for controlling the tightness of an expansion mandrel according to any one of claims 1 to 9, characterized in that: The compacting method comprises the steps of: The relative displacement of the three-axis cylinder body relative to the core shaft pull rod is adjusted through the cylinder adjustment block and the cylinder transition plate; The three-axis cylinder body moves, driving the spacing compression sleeve to move closer to the core shaft pull rod; The first drive assembly works to drive the connecting rod assembly to rotate, thereby pushing the moving top to slide in the spacing and pressing sleeve, so that the moving top extends out of the spacing and pressing sleeve and presses into the center hole at the end of the core shaft pull rod; The movement stroke of the three-axis cylinder body and the first driving cylinder is controlled to adjust the top pressure tightness of the core shaft pull rod in the expansion core shaft.

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