Battery frame sleeve press-fitting structure and method based on servo electric cylinder

Abstract

The invention provides a battery frame sleeve press-fitting structure and method based on a servo electric cylinder, and the method comprises the following steps: placing a battery frame, installing a sleeve, starting equipment through an upper operation screen, controlling the movement of a robot and a mechanical arm through the upper operation screen, and pressing the servo electric cylinder and a bushing clamp body according to a track set by a PLC (Programmable Logic Controller); and the bushing pressing clamp bodies are operated to the positions, where sleeves need to be pressed, on the battery frame one by one for pressing. The servo electric cylinder with the moving range of the mechanical arm capable of covering the double stations of the two rotating tables is adopted, the displacement sensor and the pressure sensor are assembled according to the required press-fitting force, press-fitting torque is more accurately controlled and fed back by controlling pressure and displacement parameters, gaps between parts are extremely small, and the press-fitting precision is improved. The form and location tolerances such as coaxiality and perpendicularity are easy to guarantee, the mechanical arm can achieve continuous operation, manual repeated adjustment is not needed, the time of a single process is short, and the productivity is high.

Description

Technical Field

[0001] This invention relates to the field of automotive parts installation technology, specifically to a battery frame sleeve press-fitting structure and method based on a servo electric cylinder. Background Technology

[0002] Most existing technologies use pneumatic or hydraulic methods to press-fit battery frame sleeves onto tooling. The pneumatic or hydraulic force is used to press the sleeves into the process holes of the battery frame onto the tooling. The advantage is that multiple sleeves can be pressed simultaneously, which is highly efficient. However, there are the following technical drawbacks: a single tooling can only be used for a single product; the accessibility of the pressing head for battery frames with complex structures is low; the stability of pneumatic pressing is poor; and the hydraulic pressing method requires a hydraulic station, which is bulky.

[0003] Therefore, how to design a battery frame sleeve press-fitting structure and method based on a servo electric cylinder has become an urgent problem to be solved. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a battery frame sleeve press-fitting structure and method based on a servo electric cylinder, so as to solve at least one of the above-mentioned technical problems.

[0005] The technical solution of this invention is: a battery frame sleeve press-fitting method based on a servo electric cylinder, comprising the following steps:

[0006] S1, Battery compartment placement.

[0007] The battery case is placed on the rotating platform;

[0008] S2, Sleeve installation.

[0009] Pre-install the appropriate number of sleeves in the required locations;

[0010] S3. Start the device via the host control panel.

[0011] The PLC controller sets the rotation angle of the rotary table; in areas inaccessible to the robotic arm, the rotary table drives the battery frame to rotate, thereby pre-positioning the sleeve within the robotic arm's range of motion.

[0012] The robot and robotic arm are controlled by the upper control panel. The servo electric cylinder and the bushing clamp are moved one by one to the position on the battery frame where the bushing needs to be pressed according to the trajectory set by the PLC controller.

[0013] S4, Displacement Control

[0014] The output of the servo cylinder is set by the PLC controller. After the output of the servo cylinder moves, the data of the resistance value change is fed back to the PLC controller. When the data of the resistance value change is within the set error range, it is judged that the installation of the press sleeve is qualified.

[0015] When the resistance value changes outside the set range, the PLC controller determines that the installation of the press-fit sleeve is unqualified, issues an alarm, displays the alarm information on the upper operation screen, and interrupts the program operation, waiting for manual intervention.

[0016] S5, Pressure Control

[0017] After the output end of the servo electric cylinder drives the upper mold of the pressing sleeve mold to move, it feeds back the pressure data to the PLC controller. When the pressure data is within the set error range, it is judged that the pressing sleeve is installed successfully.

[0018] When the output pressure data of the servo electric cylinder is not within the set range, the PLC controller determines that the installation of the press sleeve is unqualified, issues an alarm, displays the alarm information on the upper operation screen, and interrupts the program operation, waiting for manual intervention.

[0019] This invention employs a rotatable robotic arm mounted on a robot. The robotic arm's range of motion covers two rotating tables, providing precise gripping and easy observation. While ensuring stable torque from the servo cylinder and the clamping body, it also increases output. The servo cylinder, equipped with displacement and pressure sensors, controls the clamping torque through pressure and displacement parameters, resulting in minimal gaps between parts and easily guaranteed coaxiality, perpendicularity, and other dimensional tolerances. As the clamping process is cold-working, the material properties of the parts are unaffected, preventing thermal stress or secondary deformation, ensuring dimensional stability of the assembled product and significantly improving customer satisfaction. The clamping body is custom-made with an appropriate opening size based on the actual battery frame product, enabling clamping operations even on relatively complex battery frames. The robotic arm can operate continuously without repeated manual adjustments, resulting in short single-process times (a few seconds to tens of seconds) and high throughput, far exceeding the efficiency of manual assembly and threaded connections.

[0020] The technical solution of this invention is: a battery frame sleeve pressing structure based on a servo electric cylinder, comprising battery frames respectively mounted on a rotating table, a robot positioned between the included angle of the two rotating tables, a rotatable robotic arm mounted on the robot, the robotic arm being connected to a clamping body, the clamping body including a servo electric cylinder mounted on a pressing sleeve clamp, the robotic arm driving the pressing sleeve clamp to a sleeve pre-installation position on the battery frame; the pressing sleeve clamp is an unequal-sided U-shaped structure, the output end of the servo electric cylinder passes through the long side of the unequal-sided U-shaped structure, the output end of the servo electric cylinder being sequentially connected to a pressure sensor and the upper mold of the pressing sleeve mold; the lower mold of the pressing sleeve mold is provided inside the opening of the short side of the unequal-sided U-shaped structure, the upper mold of the pressing sleeve mold is arranged correspondingly to the lower mold; a guide rail is provided at the bottom of the internal groove of the unequal-sided U-shaped structure, the upper mold of the pressing sleeve mold is mounted on the guide rail.

[0021] This invention employs a servo electric cylinder capable of applying pressing force according to requirements and is equipped with a pressure sensor. The servo electric cylinder serves as the power source, providing precise and controllable rotational power. It has a built-in high-resolution encoder that provides real-time feedback of the rotor's position, speed, and acceleration information to the driver. The driver adjusts the output current through a PID control algorithm, achieving precise speed and torque control, resulting in more accurate control and feedback of the pressing torque. The pressing bushing clamp has an unequal-sided U-shaped structure. The servo electric cylinder is mounted on the long side of the unequal-sided U-shaped structure, and the lower die of the pressing bushing mold is mounted inside the opening on the short side of the unequal-sided U-shaped structure. The upper die of the pressing bushing mold is mounted on the unequal-sided U-shaped structure. The guide rails at the bottom of the internal groove facilitate the movement of the upper mold of the pressing sleeve mold, enabling it to be pressed into place in accordance with the lower mold. The actual pressure is monitored in real time by a pressure sensor, ensuring the pressing effect. This solves the technical defects of existing technologies, such as poor stability of pneumatic pressing and the need for a hydraulic station and large size of hydraulic pressing. By placing the robot between the angles of the two rotary tables, a dual-station operation is formed where the range of motion of the robotic arm can cover both rotary tables, improving output. The tooling can be flexibly switched according to actual needs, solving the technical defects of existing technologies, such as using a single tooling to correspond to only a single product and low accessibility to pressing heads for complex battery frame structures. Attached Figure Description

[0022] Figure 1 This is a top view of the installation structure of the present invention.

[0023] Figure 2 for Figure 1 A magnified view of part A.

[0024] Figure 3 This is a front view of the clamp plate mounting structure of the present invention.

[0025] In the diagram: 1. Servo electric cylinder; 2. Displacement sensor; 3. Press bushing clamp body; 4. Pressure sensor; 5. Press bushing mold; 6. Robot; 7. Robotic arm; 8. Rotary table. Detailed Implementation

[0026] The present invention will now be further described with reference to the accompanying drawings.

[0027] See Figure 1-3 The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0028] Example 1: A battery frame sleeve press-fitting structure based on a servo electric cylinder, referenced. Figure 1 , Figure 2The fixture includes battery frames mounted on rotating tables 8, a robot 6 positioned between the angles of the two rotating tables 8, and a rotatable robotic arm 7 mounted on the robot 6. The robotic arm 7 is connected to the fixture body, which includes a 5T servo cylinder 1 mounted on a bushing clamping body 3. The robotic arm 7 moves the bushing clamping body 3 to the pre-installed sleeve position on the battery frame. The bushing clamping body 3 has an unequal-sided U-shaped structure. The output end of the servo cylinder 1 passes through the long side of the unequal-sided U-shaped structure and is connected in sequence to a pressure sensor 4 and the upper mold of the bushing mold 5. The lower mold of the bushing mold 5 is located inside the opening of the short side of the unequal-sided U-shaped structure, and the upper mold of the bushing mold 5 is arranged correspondingly to the lower mold. A guide rail is provided at the bottom of the internal groove of the unequal-sided U-shaped structure, and the upper mold of the bushing mold 5 is mounted on the guide rail. This invention employs a servo electric cylinder capable of applying pressing force according to requirements and is equipped with a pressure sensor. The servo electric cylinder serves as the power source, providing precise and controllable rotational power. It has a built-in high-resolution encoder that provides real-time feedback of the rotor's position, speed, and acceleration information to the driver. The driver adjusts the output current through a PID control algorithm, achieving precise speed and torque control, resulting in more accurate control and feedback of the pressing torque. The pressing bushing clamp has an unequal-sided U-shaped structure. The servo electric cylinder is mounted on the long side of the unequal-sided U-shaped structure, and the lower die of the pressing bushing mold is mounted inside the opening on the short side of the unequal-sided U-shaped structure. The upper die of the pressing bushing mold is mounted on the unequal-sided U-shaped structure. The guide rails at the bottom of the internal groove facilitate the movement of the upper mold of the pressing sleeve mold, enabling it to be pressed into place in accordance with the lower mold. The actual pressure is monitored in real time by a pressure sensor, ensuring the pressing effect. This solves the technical defects of existing technologies, such as poor stability of pneumatic pressing and the need for a hydraulic station and large size of hydraulic pressing. By placing the robot between the angles of the two rotary tables, a dual-station operation is formed where the range of motion of the robotic arm can cover both rotary tables, improving output. The tooling can be flexibly switched according to actual needs, solving the technical defects of existing technologies, such as using a single tooling to correspond to only a single product and low accessibility to pressing heads for complex battery frame structures.

[0029] Example 2: Based on Example 1, the robotic arm 7 is equipped with a quick-change flange at its end, and the servo cylinder 1 has a quick-change disc connector at the end furthest from the pressure bushing clamp 3. The quick-change flange and quick-change disc connector can be quickly connected or disassembled. The pressure bushing clamp of this invention is customized with a clamp body of appropriate opening size according to actual needs, forming clamp bodies of different specifications. The quick-change flange and quick-change disc connector allow for quick connection or disassembly, facilitating the replacement of clamp bodies of different specifications. The clamp body can be flexibly switched according to actual needs, solving the technical defects of existing technologies where a single tooling can only correspond to a single product, resulting in low accessibility for battery frame pressure heads with complex structures.

[0030] Example 3: Based on Example 2, a displacement sensor 2 is provided on one side of the servo electric cylinder 1. The displacement sensor 2 is a resistive displacement sensor. This invention uses a resistive displacement sensor, which measures displacement by utilizing the change in resistance of a metal material during stretching or compression. The displacement of the object causes changes in the length and shape of the material, which in turn causes changes in the resistance value. The displacement is determined by measuring the change in resistance.

[0031] Example 4: Based on Example 3, with reference to... Figure 3 The rotary table 8 includes an electrically operated rotary table mounted on a frame. The top surface of the electrically operated rotary table is connected to a worktable, and the battery frame is mounted on the top surface of the worktable via quick-clamping. This invention utilizes a worktable mounted on the top surface of the electrically operated rotary table, allowing the battery frame to be easily fixed to the top surface of the worktable using quick-clamping.

[0032] Example 5, based on Example 3, also includes a host control panel. The servo cylinder 1, displacement sensor 2, pressure sensor 4, rotary table 8, host control panel, and robot 6 are all connected to a PLC controller. This invention uses a PLC controller to connect the servo cylinder, displacement sensor, pressure sensor, rotary table, host control panel, and robot, enabling real-time control.

[0033] Example 6: A battery frame sleeve pressing method based on a servo electric cylinder, comprising the following steps:

[0034] S1, Battery compartment placement.

[0035] The battery box is placed on the rotating platform 8;

[0036] S2, Sleeve installation.

[0037] Pre-install the appropriate number of sleeves in the required locations;

[0038] S3. Start the device via the host control panel.

[0039] The PLC controller sets the rotation angle of the rotary table 8; in areas that the robotic arm 7 cannot reach, the rotary table 8 drives the battery frame to rotate, thereby pre-positioning the sleeve within the range of motion of the robotic arm 7.

[0040] The robot 6 and the robotic arm 7 are controlled by the upper operation screen. The servo electric cylinder 1 and the bushing clamp 3 are moved one by one to the position on the battery frame where the bushing needs to be pressed according to the trajectory set by the PLC controller.

[0041] S4, Displacement Control

[0042] The output of the servo cylinder 1 is set by the PLC controller. After the output of the servo cylinder 1 moves, the data of the resistance value change is fed back to the PLC controller. When the data of the resistance value change is within the set error range, it is judged that the installation of the press sleeve is qualified.

[0043] When the resistance value changes outside the set range, the PLC controller determines that the installation of the press-fit sleeve is unqualified, issues an alarm, displays the alarm information on the upper operation screen, and interrupts the program operation, waiting for manual intervention.

[0044] S5, Pressure Control

[0045] After the output end of the servo electric cylinder 1 drives the upper mold of the pressing sleeve mold 5 to move, it feeds back the pressure data to the PLC controller. When the pressure data is within the set error range, it is judged that the pressing sleeve is installed successfully.

[0046] When the output pressure data of servo electric cylinder 1 is not within the set range, the PLC controller determines that the installation of the press sleeve is unqualified, issues an alarm, displays the alarm information on the upper operation screen, and interrupts the program operation, waiting for manual intervention. This invention employs a rotatable robotic arm mounted on a robot. The robotic arm's range of motion covers two rotating tables, providing precise gripping and easy observation. While ensuring stable torque from the servo cylinder and the clamping body, it also increases output. The servo cylinder, equipped with displacement and pressure sensors, controls the clamping torque through pressure and displacement parameters, resulting in minimal gaps between parts and easily guaranteed coaxiality, perpendicularity, and other dimensional tolerances. As the clamping process is cold-working, the material properties of the parts are unaffected, preventing thermal stress or secondary deformation, ensuring dimensional stability of the assembled product and significantly improving customer satisfaction. The clamping body is custom-made with an appropriate opening size based on the actual battery frame product, enabling clamping operations even on relatively complex battery frames. The robotic arm can operate continuously without repeated manual adjustments, resulting in short single-process times (a few seconds to tens of seconds) and high throughput, far exceeding the efficiency of manual assembly and threaded connections.

[0047] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A battery frame sleeve press-fitting structure based on a servo electric cylinder, comprising a battery frame mounted on a rotating table (8) respectively, a robot (6) is arranged between the included angles of the two rotating tables (8), and a rotatable mechanical arm (7) is arranged on the robot (6), characterized in that: The mechanical arm (7) is connected with a clamp body, the clamp body comprises a servo cylinder (1), the servo cylinder (1) is installed on a pressure bushing clamp body (3), the mechanical arm (7) drives the pressure bushing clamp body (3) to move to the sleeve preloading position on the battery frame;The pressure bushing clamp body (3) is an unequal side U-shaped structure, the output end of the servo cylinder (1) passes through the long side of the unequal side U-shaped structure, and the output end of the servo cylinder (1) is connected with the upper die of the sleeve pressing die (5) in turn;The lower die of the sleeve pressing die (5) is arranged on the inner side of the opening of the short side of the unequal side U-shaped structure, and the upper die and the lower die of the sleeve pressing die (5) are arranged correspondingly;The inside groove bottom of the unequal side U-shaped structure is provided with a guide rail, and the upper die of the sleeve pressing die (5) is installed on the guide rail.

2. The battery frame sleeve press-fit structure based on a servo cylinder according to claim 1, characterized in that: The end of the mechanical arm (7) is provided with a quick-change flange plate, and the end of the servo cylinder (1) away from the pressure bushing clamp body (3) is provided with a quick-change disc connector, and the quick-change flange plate and the quick-change disc connector can be quickly connected or detached.

3. The battery frame sleeve press-fit structure based on a servo cylinder according to claim 2, characterized in that: One side of the servo cylinder (1) is provided with a displacement sensor (2), and the displacement sensor (2) is an electric resistance type displacement sensor.

4. The battery frame sleeve press-fit structure based on a servo cylinder according to claim 3, characterized in that: The rotating table (8) comprises an electric rotating table mounted on a rack, the top surface of the electric rotating table is connected with a workbench, and the battery frame is installed on the top surface of the workbench through quick clamps.

5. The battery frame sleeve press-fit structure based on a servo cylinder according to claim 3, characterized in that: It also includes an upper operation screen, the servo cylinder (1), the displacement sensor (2), the pressure sensor (4), the rotating table (8), the upper operation screen and the control end of the robot (6) are connected to the PLC controller.

6. A battery frame sleeve press fitting method based on a servo electric cylinder, characterized in that: The steps include: S1, the battery frame is placed, The battery frame is placed on the rotating table (8); S2, sleeve installation, A corresponding number of sleeves are preloaded at the required position; S3, start the equipment through the upper operation screen, Through the upper operation screen, the movement of the robot (6) and the mechanical arm (7) is controlled, the servo cylinder (1) and the pressure bushing clamp body (3) are set according to the trajectory of the PLC controller, and the pressure bushing clamp body (3) is operated to the position of the battery frame where the sleeve needs to be pressed and installed; S4, displacement control, The output end of the servo cylinder (1) is set by the PLC controller, and after the movement of the output end of the servo cylinder (1), the data of the resistance value change is fed back to the PLC controller, and when the data of the resistance value change is within the set error range, it is judged that the installation of the pressed sleeve is qualified; S5, pressure control, After the output end of the servo cylinder (1) drives the upper die of the sleeve pressing die (5) to move, the data of the pressure is fed back to the PLC controller, and when the data of the pressure is within the set error range, it is judged that the installation of the pressed sleeve is qualified.

7. The battery can sleeve press-fit method based on a servo cylinder according to claim 6, characterized in that: In the step S4, when the data of the resistance value change is not within the set range, the PLC controller judges that the installation of the pressed sleeve is unqualified, issues an alarm, displays the alarm information on the upper operation screen, and interrupts the program running, waits for manual intervention.

8. The battery can sleeve press-fit method based on a servo cylinder according to claim 6, characterized in that: In the step S5, when the data of the pressure of the output end of the servo cylinder (1) is not within the set range, the PLC controller judges that the installation of the pressed sleeve is unqualified, issues an alarm, displays the alarm information on the upper operation screen, and interrupts the program running, waits for manual intervention.

9. The battery can sleeve press-fit method based on a servo cylinder according to claim 6, characterized in that: In step S3, the PLC controller sets the rotation angle of the rotating table (8); in the part that the mechanical arm (7) cannot reach, the rotating table (8) drives the battery frame to rotate, rotates the sleeve preloading position within the activity range of the mechanical arm (7), repeats steps S3-S5, and until all the needed sleeve press-fitting is completed.

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