Precise servo press for assembling electrical equipment

Abstract

The utility model belongs to servo press machine technical field especially, especially a kind of precision servo press machine for electrical equipment assembly, including rack, the rack top outer wall is provided with the column of symmetrical distribution, and the outer wall of two columns is slidably connected with sliding sleeve, and the upper mounting plate and lower mounting plate are sequentially installed between two sliding sleeves from top to bottom, and the outer wall of upper mounting plate and lower mounting plate is provided with servo down-pressing mechanism. The utility model in servo down-pressing mechanism, the rotary motion of servo motor can be converted into the linear motion of down-pressing seat, transmission is stable and the pressure control precision is high, the automatic material moving mechanism is driven by the cylinder in the horizontal moving plate to drive product positioning seat to move, realizes the automatic transfer of the product to be assembled, without manual operation, reduce labour intensity and reduce positioning error, and the safety light curtain on sliding sleeve can form protection area, improve the security of equipment use.

Description

Technical Field

[0001] This utility model relates to the field of servo press technology, and in particular to a precision servo press for assembling electrical equipment. Background Technology

[0002] Precision servo presses for electrical equipment assembly are key equipment in the production of electrical equipment. They are mainly used to complete precision assembly processes such as pressing and riveting of parts. Through the precise control of pressure and displacement by the servo system, they ensure the dimensional accuracy and connection stability of electrical components after assembly. They are widely used in the production of electrical products such as circuit breakers, relays, and servo motors. Their performance directly affects the assembly quality and production efficiency of electrical equipment.

[0003] In practical use, traditional servo presses have some shortcomings:

[0004] First, the motion accuracy of the pressing mechanism is easily limited by the structure. Most of them use simple cylinder drive or screw drive. The former has low pressure control accuracy, while the latter is prone to jamming and lacks a stable guide structure, which makes the pressing seat easy to deviate during the movement, affecting the assembly accuracy.

[0005] In addition, the low level of automation requires manual handling of products to be assembled, which not only increases the labor intensity of operators, but also makes it easy for products to be mispositioned due to human error. Furthermore, the lack of an effective safety protection structure makes it easy for personnel to accidentally touch the product during the pressing process. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a precision servo press for assembling electrical equipment, which overcomes the deficiencies of existing technologies and effectively solves the problems of easy displacement of the lower pressure seat, low assembly accuracy, and the need for manual material handling with a lack of safety protection in servo presses.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A precision servo press for assembling electrical equipment includes a frame. Symmetrically distributed columns are provided on the top outer wall of the frame, and sliding sleeves are slidably connected to the outer walls of two columns. An upper mounting plate and a lower mounting plate are installed between the two sliding sleeves from top to bottom. A servo pressing mechanism is provided on the outer walls of the upper and lower mounting plates. A safety light curtain is fixedly connected to the bottom of one side of the outer wall of each of the two sliding sleeves by screws. An automatic material transfer mechanism is provided on the top outer wall of the frame below the servo pressing mechanism.

[0009] The servo pressing mechanism includes a gearbox fixedly connected to one side of the outer wall of the upper mounting plate by screws, a servo motor installed on the top outer wall of the gearbox, a rotary disk fixedly connected to the output shaft of the gearbox, a connecting rod rotatably connected to one side of the outer wall of the rotary disk, a columnar force sensor rotatably connected to one end of the connecting rod, and a pressing seat set on the bottom outer wall of the columnar force sensor.

[0010] Preferably, the pressure seat is located between two safety light curtains.

[0011] Preferably, the automatic material transfer mechanism includes a cylinder disposed on the top of the frame, a transverse plate fixedly connected to the piston rod of the cylinder, and a product positioning seat fixedly connected to the outer wall of the top of the transverse plate by screws.

[0012] Preferably, the outer wall of one side of the lower mounting plate is fixedly connected with symmetrically distributed slide rails by screws, and the lower pressure seat is slidably connected to the inner wall of the slide rails.

[0013] Preferably, a vertical plate is fixedly connected to the top outer wall of the frame, and the cylinder is fixedly connected to the outer wall of the vertical plate by screws. A symmetrically distributed guide rod is installed through one side of the outer wall of the vertical plate, and a transverse plate is slidably connected to the outer wall of the guide rod. Both ends of one side of the outer wall of the vertical plate are welded with baffles for blocking the transverse plate.

[0014] Preferably, the tops of the two columns are fixedly connected to a crossbar by screws, and a threaded rod is provided through the inner wall of the crossbar. Nuts are screwed onto the outer wall of the threaded rod, and the two nuts are respectively tightly attached to the top and bottom outer walls of the crossbar. The threaded rod is installed on the top outer wall of the upper mounting plate.

[0015] Preferably, a PLC control panel is provided on the outer wall of the other side of the upper mounting plate, and the PLC control panel includes an HMI display screen, a PLC controller and a protective cover. The rotating disk is located inside the protective cover, and the PLC control panel is connected to the servo motor, the safety light curtain and the cylinder through signal lines.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The precision servo press for electrical equipment assembly designed in this paper can convert the rotational motion of the servo motor into the linear motion of the press seat in the servo pressing mechanism. The transmission is smooth and the pressure control accuracy is high. At the same time, the slide rail on the lower mounting plate guides the press seat and prevents the press seat from deviating, thus solving the problem of low assembly accuracy of traditional presses.

[0018] 2. The precision servo press for electrical equipment assembly designed in this paper uses a cylinder-driven transverse plate in the automatic material transfer mechanism to move the product positioning seat, thereby realizing the automatic transfer of products to be assembled without manual operation, reducing labor intensity and positioning errors. In addition, the safety light curtain on the sliding sleeve can form a protective area. When an object enters, the PLC control panel will immediately stop the operation of the equipment to avoid safety accidents and improve the safety of equipment use. Attached Figure Description

[0019] Figure 1 This is a front view of the overall structure of a precision servo press for assembling electrical equipment proposed in this utility model;

[0020] Figure 2 This is a rear view of the overall structure of a precision servo press for assembling electrical equipment, as proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of a precision servo press for assembling electrical equipment according to the present invention, when the product positioning seat is transferred to the area directly below the rotary table.

[0022] Figure 4 This is a schematic diagram of the top connection structure of the frame of a precision servo press for assembling electrical equipment, as proposed in this utility model.

[0023] Figure 5 This is a schematic diagram of the automatic material transfer mechanism of a precision servo press for assembling electrical equipment, as proposed in this utility model.

[0024] In the diagram: 1. Frame; 2. Column; 3. Sliding sleeve; 4. Upper mounting plate; 5. Lower mounting plate; 6. Servo pressing mechanism; 61. Gearbox; 62. Servo motor; 63. Rotary disk; 64. Connecting rod; 65. Column force sensor; 66. Pressing seat; 7. Safety light curtain; 8. Automatic material transfer mechanism; 81. Cylinder; 82. Horizontal transfer plate; 83. Product positioning seat; 9. Slide rail; 10. Vertical plate; 11. Guide rod; 12. Baffle; 13. Horizontal bar; 14. Screw; 15. PLC control panel; 16. Protective cover; 17. PLC controller; 18. HMI display screen. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-5Example 1: A precision servo press for assembling electrical equipment includes a frame 1. Symmetrically distributed columns 2 are arranged on the top outer wall of the frame 1, and sliding sleeves 3 are slidably connected to the outer walls of two columns 2. An upper mounting plate 4 and a lower mounting plate 5 are sequentially installed between the two sliding sleeves 3 from top to bottom. A servo pressing mechanism 6 is provided on the outer walls of the upper mounting plate 4 and the lower mounting plate 5. The servo pressing mechanism 6 includes a reducer fixed to one side of the outer wall of the upper mounting plate 4 by screws. The gearbox 61, the servo motor 62 mounted on the top outer wall of the gearbox 61, the rotary disk 63 fixedly connected to the output shaft of the gearbox 61, the connecting rod 64 rotatably connected to one side outer wall of the rotary disk 63, the column force sensor 65 rotatably connected to one end outer wall of the connecting rod 64, and the pressure seat 66 set on the bottom outer wall of the column force sensor 65, the lower mounting plate 5 has symmetrically distributed slide rails 9 fixedly connected to one side outer wall by screws, and the pressure seat 66 is slidably connected to the inner wall of the slide rails 9.

[0027] Through the above scheme, the frame 1 provides a supporting foundation for the entire equipment, ensuring the stability of the installation of each component; the column 2 is vertically fixed to the top of the frame 1, and the sliding sleeve 3 can slide up and down along the column 2, thereby driving the upper mounting plate 4 and the lower mounting plate 5 to adjust their height to adapt to different assembly scenarios; the servo pressing mechanism 6 is the core execution component, with the servo motor 62 providing power, which reduces the speed and increases the torque through the reduction gearbox 61, driving the rotating disk 63 to rotate. The rotating disk 63 pulls the column force sensor 65 up and down through the connecting rod 64, ultimately driving the pressing seat 66 to complete the pressing action; the slide rail 9 slides with the pressing seat 66, restricting the pressing seat 66 to move only in the vertical direction, avoiding lateral deviation during the pressing process, and ensuring the accuracy of the pressing position.

[0028] In embodiment 2, safety light curtains 7 are fixedly connected to the bottom of the outer wall of each of the two sliding sleeves 3 by screws. The pressing seat 66 is located between the two safety light curtains 7. An automatic material transfer mechanism 8 is provided on the top outer wall of the frame 1 below the servo pressing mechanism 6. The automatic material transfer mechanism 8 includes a cylinder 81 set on the top of the frame 1, a transverse plate 82 fixedly connected to the piston rod of the cylinder 81, and a product positioning seat 83 fixedly connected to the top outer wall of the transverse plate 82 by screws.

[0029] With the above scheme, the safety light curtain 7 is symmetrically distributed on both sides of the lower pressure seat 66. After being powered on, it forms an invisible infrared protective light curtain. When the operator's hand or other object enters the light curtain area, the equipment immediately stops operating to prevent the lower pressure seat 66 from crushing personnel or damaging items, thus improving operational safety. The automatic material transfer mechanism 8 is responsible for product transportation. The product positioning seat 83 is used to accurately place the product to be assembled. The cylinder 81 drives the horizontal transfer plate 82 to move horizontally through the extension and retraction of the piston rod, thereby moving the product positioning seat 83 to the lower pressure seat 66 for pressing. After pressing, it is moved to the material picking position to realize automated loading and unloading and reduce manual intervention.

[0030] A vertical plate 10 is fixedly connected to the top outer wall of the frame 1, and a cylinder 81 is fixedly connected to the outer wall of the vertical plate 10 by screws. A symmetrically distributed guide rod 11 is installed through one side of the outer wall of the vertical plate 10, and a transverse plate 82 is slidably connected to the outer wall of the guide rod 11. Both ends of one side of the outer wall of the vertical plate 10 are welded with baffles 12 for blocking the transverse plate 82.

[0031] Through the above scheme, the vertical plate 10 provides a mounting support point for the cylinder 81, ensuring that the cylinder 81 is fixed firmly and the piston rod extension and retraction direction is accurate; the guide rod 11 is distributed parallel to the vertical plate 10, and the transverse plate 82 can slide along the guide rod 11 to avoid the transverse plate 82 from swaying up and down during the movement, further improving the transfer accuracy of the product positioning seat 83; the baffles 12 are located on both sides of the vertical plate 10. When the transverse plate 82 moves to the maximum stroke, the baffles 12 can stop the transverse plate 82 from continuing to move, thus playing the role of positioning the product positioning seat 83.

[0032] The tops of the two columns 2 are fixedly connected to the crossbars 13 by screws, and the inner wall of the crossbars 13 is provided with threaded rods 14. The outer wall of the threaded rods 14 is screwed with adjacent nuts, and the two nuts are respectively tightly attached to the top and bottom outer walls of the crossbars 13. The threaded rods 14 are installed on the top outer wall of the upper mounting plate 4.

[0033] The above scheme achieves lifting and lowering by rotating the screw 14 and locking it with double nuts. The crossbar 13 connects the tops of the two columns 2, enhancing the overall structural stability of the columns 2 and preventing them from tilting to the sides when under force. The lower end of the screw 14 is fixed to the upper mounting plate 4, and the upper end passes through the crossbar 13. By adjusting the upper and lower nuts on the outer wall of the screw 14, the length of the screw 14 extending out of the crossbar 13 can be changed, thereby driving the upper mounting plate 4 and the lower mounting plate 5 to move up and down along the columns 2, realizing the height adjustment of the servo pressing mechanism 6 to meet the pressing requirements of products with different thicknesses.

[0034] A PLC control panel 15 is provided on the outer wall of the other side of the upper mounting plate 4. The PLC control panel 15 includes an HMI display screen 18, a PLC controller 17 and a protective cover 16. The rotating disk 63 is located inside the protective cover 16. The PLC control panel 15 is connected to the servo motor 62, the safety light curtain 7 and the cylinder 81 through signal lines.

[0035] Through the above scheme, the PLC control panel 15 serves as the operation and control center of the equipment, integrating control circuitry. Operators can set parameters such as the speed of the servo motor 62 and the stroke of the cylinder 81 through the PLC control panel 15. The protective cover 16 encloses the rotating disk 63, providing dust protection and preventing external interference during its operation. The PLC control panel 15 receives signals from the safety light curtain 7 in real time via signal lines. The light curtain signal is processed by the PLC with a response time of <0.1s and has emergency stop redundancy. When the light curtain is blocked, a command is immediately sent to stop the servo motor 62 and the cylinder 81. The automatic material transfer mechanism 8 and the servo pressing mechanism 6 are interlocked. When the transverse plate 82 has not reached the positioning position, the PLC prohibits the servo motor 62 from starting the pressing action, ensuring operational safety. At the same time, the PLC can control the servo motor 62 and the cylinder 81 to work together according to a preset program to achieve automated assembly process.

[0036] The column-type force sensor 65 is electrically connected to the PLC controller 17 to achieve closed-loop pressure control. The system adopts a force-position composite control strategy.

[0037] 1. Force-position composite control algorithm:

[0038] F_d=K_p*(F_set-F_meas)+K_d*d(F_set-F_meas) / dtx_d=x_set+∫F_d / k_stiffness dt

[0039] Where F_set is the set pressure, F_meas is the measured pressure, and k_stiffness is the system stiffness.

[0040] 2. S-curve acceleration / deceleration algorithm:

[0041] a(t)=a_max*[1-cos(πt / T_acc)] / 2

[0042] v(t)=∫a(t)dt

[0043] s(t)=∫v(t)dt

[0044] Where a_max is the maximum acceleration and T_acc is the acceleration time.

[0045] 3. Feedforward compensation formula:

[0046] u_ff=k_stiffness*x_d+b_damping*v_d+F_friction*sign(v_d)

[0047] It includes stiffness, damping, and friction compensation.

[0048] 4. Pressure-displacement switching conditions:

[0049] if F_meas>=F_set then switch to force control

[0050] else continue position control.

[0051] The column-type force sensor 65 collects the pressing force signal in real time and feeds it back to the PLC controller 17. The system adopts a force-position composite control strategy.

[0052] When the actual pressure does not reach the set value, the system mainly uses position control;

[0053] When the actual pressure reaches or approaches the set value, the system switches to pressure control.

[0054] Smooth motion is achieved through an S-curve acceleration / deceleration algorithm;

[0055] The effects of system stiffness, damping, and friction are eliminated by using a feedforward compensation algorithm.

[0056] Working principle: First, the equipment is debugged: by adjusting the screw 14 on the top crossbar 13 of the column 2, the upper mounting plate 4 and the lower mounting plate 5 are driven to slide along the column 2, and the servo pressing mechanism 6 is adjusted to a suitable height. Then, the parameters such as the speed of the servo motor 62 and the stroke of the cylinder 81 are set through the PLC control panel 15 to ensure that the equipment meets the current product assembly requirements.

[0057] During assembly, the product to be assembled is placed on the product positioning seat 83 of the automatic transfer mechanism 8, and the equipment is started via the PLC control panel 15: the piston rod of the cylinder 81 retracts, driving the transverse plate 82 to slide along the guide rod 11, moving the product positioning seat 83 directly below the lower pressure seat 66. At this time, the baffle 12 on the vertical plate 10 restricts the position of the transverse plate 82 to ensure accurate product positioning; then the servo motor 62 starts, driving the rotary disk 63 to rotate via the reduction gearbox 61. The rotary disk 63 pulls the column force sensor 65 downward through the connecting rod 64, causing the lower pressure seat 66 to move vertically downward along the slide rail 9 to press the product; during the pressing process, the safety light curtain 7 continuously monitors the areas on both sides of the lower pressure seat 66. If an object enters, the equipment is immediately stopped via the PLC control panel 15.

[0058] After pressing is completed, the servo motor 62 reverses to reset the lower pressing seat 66, the piston rod of the cylinder 81 extends, and the product positioning seat 83 is moved to the material picking position. The operator takes out the assembled product and completes one assembly cycle.

[0059] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision servo press for assembling electrical equipment, comprising a frame (1), characterized in that, The top outer wall of the frame (1) is provided with symmetrically distributed columns (2), and each of the two columns (2) is slidably connected with a sliding sleeve (3). An upper mounting plate (4) and a lower mounting plate (5) are installed between the two sliding sleeves (3) from top to bottom. A servo pressing mechanism (6) is provided on the outer wall of the upper mounting plate (4) and the lower mounting plate (5). A safety light curtain (7) is fixedly connected to the bottom of the outer wall on one side of each of the two sliding sleeves (3) by screws. An automatic material transfer mechanism (8) is provided on the top outer wall of the frame (1) below the servo pressing mechanism (6). The servo pressing mechanism (6) includes a gearbox (61) fixedly connected to the outer wall of one side of the upper mounting plate (4) by screws, a servo motor (62) installed on the top outer wall of the gearbox (61), a rotary disk (63) fixedly connected to the output shaft of the gearbox (61), a connecting rod (64) rotatably connected to the outer wall of one side of the rotary disk (63), a column force sensor (65) rotatably connected to the outer wall of one end of the connecting rod (64), and a pressing seat (66) set on the bottom outer wall of the column force sensor (65).

2. The precision servo press for assembling electrical equipment according to claim 1, characterized in that, The pressure seat (66) is located between the two safety light curtains (7).

3. A precision servo press for assembling electrical equipment according to claim 1, characterized in that, The automatic material handling mechanism (8) includes a cylinder (81) disposed on the top of the frame (1), a transverse plate (82) fixedly connected to the piston rod of the cylinder (81), and a product positioning seat (83) fixedly connected to the outer wall of the top of the transverse plate (82) by screws.

4. A precision servo press for assembling electrical equipment according to claim 1, characterized in that, The lower mounting plate (5) has symmetrically distributed slide rails (9) fixedly connected to one side of its outer wall by screws, and the lower pressure seat (66) is slidably connected to the inner wall of the slide rail (9).

5. A precision servo press for assembling electrical equipment according to claim 3, characterized in that, A vertical plate (10) is fixedly connected to the top outer wall of the frame (1), and a cylinder (81) is fixedly connected to the outer wall of the vertical plate (10) by screws. A guide rod (11) is symmetrically distributed through the outer wall of one side of the vertical plate (10), and a transverse plate (82) is slidably connected to the outer wall of the guide rod (11). Both ends of the outer wall of one side of the vertical plate (10) are welded with baffles (12) to block the transverse plate (82).

6. A precision servo press for assembling electrical equipment according to claim 1, characterized in that, The tops of the two columns (2) are fixedly connected to a crossbar (13) by screws, and a screw rod (14) is provided through the inner wall of the crossbar (13). Nuts are screwed onto the outer wall of the screw rod (14) and the two nuts are respectively attached to the top and bottom outer walls of the crossbar (13). The screw rod (14) is installed on the top outer wall of the upper mounting plate (4).

7. A precision servo press for assembling electrical equipment according to claim 1, characterized in that, The upper mounting plate (4) has a PLC control panel (15) on its other outer wall. The PLC control panel (15) includes an HMI display screen (18), a PLC controller (17), and a protective cover (16). The rotating disk (63) is located inside the protective cover (16). The PLC control panel (15) is connected to the servo motor (62), the safety light curtain (7), and the cylinder (81) via signal lines.

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