Condensation pipe feeding machine capable of automatically adjusting tensile force

Abstract

The utility model provides a condenser pipe feeder capable of automatically adjusting tensile force. The condenser pipe feeder comprises a portal frame, bridge feet at the two ends of the portal frame are installed on Y-axis guide rails respectively, a Y-axis lead screw bearing seat is installed at one end of the lower end face of the top of the portal frame and connected with an X-axis lead screw mechanism parallel to the Y-axis guide rails, and an X-axis guide shaft perpendicular to the Y-axis guide rails is installed on the edge of the upper end face of the top of the portal frame. By means of the wire feeding mechanism, the condenser pipe only needs to be guided into the wire feeding machine for the first time, and then continuous feeding in the bending process of the condenser pipe can be automatically completed subsequently. And the direct-current generator is arranged, part of electric quantity can be recycled through the direct-current generator, the feeding speed of the condensation pipe can be fed back through the electric quantity generated by the generator, and therefore real-time adjustment is conducted, and the situation that the condensation pipe is damaged due to the fact that the running speed of the feeding mechanism is not matched is avoided.

Description

Technical Field

[0001] This utility model relates to a condenser tube feeder with automatic tension adjustment. Background Technology

[0002] As a crucial active component in the heat exchange devices of refrigerators and air conditioners, condenser tubes require bending into movable shapes during production, followed by cutting and hole enlargement processes. Current condenser tube processing often relies on manual feeding, resulting in low efficiency. To improve efficiency, an automatic condenser tube clamping and feeding device, as disclosed in CN116833323A, uses a feeding module and a bending module to automatically clamp and feed condenser tubes, reducing operating costs and improving feeding efficiency. This overcomes the problem of condenser tubes being piled up and unable to be fed one by one. However, it can only feed already cut condenser tube material and cannot adjust the feeding speed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a condenser tube feeder with automatic tension adjustment.

[0004] This utility model is achieved through the following technical solution.

[0005] This utility model provides a condenser tube feeder with automatic tension adjustment, comprising a gantry frame; the bridge legs at both ends of the gantry frame are respectively mounted on a Y-axis guide rail; a Y-axis lead screw bearing seat is mounted at one end of the lower top surface of the gantry frame, the Y-axis lead screw bearing seat is connected to an X-axis lead screw mechanism parallel to the Y-axis guide rail; an X-axis guide shaft perpendicular to the Y-axis guide rail is mounted on the edge of the upper top surface of the gantry frame; guide shaft bearing seats are mounted at both ends of the middle of the upper top surface of the gantry frame, and the two guide shaft bearing seats are connected by an X-axis lead screw, one of the guide shafts... A closed-loop motor is mounted on the bearing housing and connected to the X-axis lead screw. A robot arm support plate is mounted on the X-axis guide shaft. One end of the robot arm support plate extends out of the end face of the guide shaft bearing housing and a wire feeding plate is mounted vertically. A guide wheel is provided on the top of the wire feeding plate, and a guide wheel assembly is mounted on one side of the wire feeding plate. A steering mechanism is mounted on the upper bottom surface of the wire feeding plate. The steering mechanism is connected to the wire guide groove on the lower bottom surface of the wire feeding plate. The Y-axis guide rail is mounted on the machining table. A fixing fixture and a wire guide fixture are also mounted on the table. The clamping jaws of the fixing fixture and the wire guide fixture are on the same straight line.

[0006] The guide wheel assembly includes several guide wheels, which are arranged in two rows vertically on the wire feeding plate.

[0007] A generator is also installed on the side of the wire feeding plate opposite to the guide wheel. The guide wheel extends into the generator through a rotating shaft and is connected to the rotor inside the generator through a guide wheel synchronous gear.

[0008] The bottom of the wire feeding plate is fixedly connected to a wire feeding base on the side facing away from the gantry. The wire feeding base is an L-shaped plate, and a triangular plate is provided on each side of the wire feeding base. The bottom of the wire feeding base is perpendicular to the wire feeding plate. The steering structure and the wire guide groove are respectively installed on the upper and lower end faces of the bottom of the wire feeding base.

[0009] The steering mechanism includes a bearing cover, with a deep groove ball bearing installed at both the upper and lower ends of the bearing cover. A steering shaft is installed inside the two deep groove ball bearings. The upper end of the steering shaft extends out of the bearing cover and is equipped with a driven gear. The lower end of the steering shaft extends out of the bottom of the wire feeding base and connects to the wire guide groove. The driven gear cooperates with the driving gear. The driving gear is mounted on a servo motor, which is vertically mounted at the bottom of the wire feeding base.

[0010] The guide wire groove is a semi-circular annular groove. A pulley is installed on the opening of the annular groove. The pulley and the bottom of the annular groove form a channel for the condenser tube to pass through. One end of the guide wire groove is fixed to the steering shaft, and the other end is tightly attached to the processing table.

[0011] The bottom end of the steering shaft extends into the annular groove of the guide wire slide, and an axial through hole is machined inside the steering shaft.

[0012] The steering shaft is equipped with a linear bearing.

[0013] A feeding method for a condenser tube feeder with automatic tension adjustment includes the following steps:

[0014] S1. Manually pass the condenser tube through the guide wheel, guide wheel assembly, steering shaft, guide wire groove, and guide wire clamp in sequence, and fix its end in the fixing clamp;

[0015] S2. The given voltage Ug causes the X-axis lead screw mechanism and the Y-axis lead screw mechanism to operate, so that the condenser tube is pulled out of the guide wire groove by the fixed clamp.

[0016] S3. The guide wheel rotates under the friction of the condenser tube, driving the synchronous gear of the guide wheel to drive the rotor of the generator to rotate. An induced current is generated in the generator. The magnitude of the induced current generated by the generator is detected by a Hall sensor. The running speed of the X-axis lead screw mechanism and the Y-axis lead screw mechanism is adjusted according to the magnitude of the induced current.

[0017] When the detected induced current increases, the given voltage Ug is reduced, thereby reducing the operating speed of the X-axis lead screw mechanism and the Y-axis lead screw mechanism;

[0018] When the detected induced current decreases, the given voltage Ug is increased, thereby increasing the operating speed of the X-axis lead screw mechanism and the Y-axis lead screw mechanism;

[0019] The adjustment method for the X-axis lead screw mechanism or Y-axis lead screw mechanism based on the induced current Ia is as follows:

[0020] Ea =C e φn=K e n

[0021] U a =E a -I a R a

[0022]

[0023] In the formula: E a To induce electromotive force, C e U is the electromotive force constant, n is the servo motor speed of the X-axis or Y-axis lead screw mechanism, and U is the servo motor speed of the X-axis or Y-axis lead screw mechanism. a For induced voltage, I a For induced current, R a R is the power supply resistor. L This is the load resistance.

[0024] The beneficial effects of this invention are as follows: The condenser tube only needs to be introduced into the wire feeder once, and subsequent continuous feeding during the condenser tube bending process can be completed automatically. Furthermore, a DC generator is provided, which not only recovers some electricity but also uses the generated electricity to provide feedback on the condenser tube feeding speed, allowing for real-time adjustment and preventing damage to the condenser tube due to mismatched feeding mechanism speeds. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the guide wheel assembly structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the steering device structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the power supply principle of this utility model;

[0029] Figure 5 This is a schematic diagram illustrating the speed regulation principle of this utility model;

[0030] Figure 6 This is a schematic diagram of the speed adjustment process of this utility model;

[0031] In the diagram: 1-Gantry frame, 2-Guide shaft bearing seat, 3-X-guide shaft, 4-X-direction lead screw, 5-Y-direction slider, 6-robotic arm support plate, 7-generator, 8-guide wheel, 9-condenser pipe, 10-guide wheel support plate, 11-wire feeding plate, 12-guide wheel, 13-servo motor, 14-wire feeding base, 15-closed-loop motor mounting base, 16-closed-loop motor, 17-coupling, 18-Y-axis lead screw bearing seat, 19-Y-axis motion pad, 20-Y-axis guide rail, 21-base plate, 22-drive gear, 23-drive gear, 24-wire guide groove, 25-wire guide clamp, 26-fixed clamp, 27-Y-axis slider, 28-guide wheel synchronous gear, 29-bearing cover, 30-deep groove ball bearing, 31-steering shaft. Detailed Implementation

[0032] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0033] A condenser tube feeder with automatic tension adjustment includes a gantry frame 1. The bridge legs at both ends of the gantry frame 1 are respectively mounted on a Y-axis guide rail 20. A Y-axis lead screw bearing seat 18 is mounted at one end of the lower top surface of the gantry frame 1. The Y-axis lead screw bearing seat 18 is connected to an X-axis lead screw mechanism parallel to the Y-axis guide rail 20. An X-axis guide shaft 3 perpendicular to the Y-axis guide rail 20 is mounted on the edge of the upper top surface of the gantry frame 1. Guide shaft bearing seats 2 are mounted at both ends of the middle of the upper top surface of the gantry frame 1. The two guide shaft bearing seats 2 are connected by an X-axis lead screw 4. A closed-loop mechanism is mounted on one of the guide shaft bearing seats 2. The motor 16 is connected to the X-axis lead screw 4. A robot arm support plate 6 is installed on the X-axis guide shaft 3. One end of the robot arm support plate 6 extends out of the end face of the guide shaft bearing seat 2 and a wire feeding plate 11 is installed vertically. A guide wheel 8 is provided on the top of the wire feeding plate 11. A guide wheel assembly is installed on one side of the wire feeding plate 11. A steering mechanism is installed on the upper bottom surface of the wire feeding plate 11. The steering mechanism is connected to the wire guide groove 24 on the lower bottom surface of the wire feeding plate 11. The Y-axis guide rail 20 is installed on the processing table. A fixing clamp 26 and a wire guide clamp 25 are also installed on the table. The clamping jaws of the fixing clamp 26 and the wire guide clamp 25 are on the same straight line.

[0034] The guide wheel assembly includes several guide wheels 12, which are arranged in two rows vertically on the wire feeding plate 11.

[0035] The wire feeding plate 11 also has a generator 7 installed on the side opposite to the guide wheel 12. The guide wheel 12 extends into the generator 7 through a rotating shaft and is connected to the rotor inside the generator 7 through the guide wheel synchronous gear 28.

[0036] The bottom of the wire feeding plate 11 is fixedly connected to the side of the gantry frame 1. The wire feeding base 14 is an L-shaped plate. A triangular plate is provided on each side of the wire feeding base 14. The bottom of the wire feeding base 14 is perpendicular to the wire feeding plate 11. The turning structure and the wire guide groove 24 are respectively installed on the upper and lower end faces of the bottom of the wire feeding base 14.

[0037] The steering mechanism includes a bearing cover 29, with a deep groove ball bearing 30 installed at both the upper and lower ends of the bearing cover 29. A steering shaft 31 is installed inside the two deep groove ball bearings 30. The upper end of the steering shaft 31 extends out of the bearing cover 29 and is equipped with a driven gear 23. The lower end of the steering shaft 31 extends out of the bottom of the wire feeding base 14 and is connected to the wire guide groove 24. The driven gear 23 cooperates with the driving gear 22. The driving gear 22 is mounted on a servo motor 13, which is vertically mounted at the bottom of the wire feeding base 14.

[0038] The guide wire groove 24 is a semi-circular annular groove. A pulley is installed on the opening of the annular groove. The pulley and the bottom of the annular groove form a channel through which the condenser tube 9 passes. One end of the guide wire groove 24 is fixed to the steering shaft 31, and the other end is tightly attached to the processing table.

[0039] The bottom end of the steering shaft 31 extends into the annular groove of the guide wire groove 24, and an axial through hole is machined inside the steering shaft 31.

[0040] The steering shaft 31 is equipped with a linear bearing.

[0041] like Figures 1-3As shown, before bending, the condenser tube 9 is manually guided to the wire feeding mechanism by a worker. The guide wheel 8, guide wheel 12, and wire guide pulley 24 work together to form an "L"-shaped guide path, and the condenser tube 9 is fed to the wire guide clamp 25. After the initial manual feeding, the closed-loop motor 16 on the X-axis main board 1 drives the X-axis lead screw 4 to rotate, and the robotic arm support plate 6 moves horizontally on the X-axis guide rail 3, realizing the movement of the wire guide mechanism in the X direction. The same applies to the Y direction. Driven by the motor, the gantry crane moves the condenser tube to the fixed clamp 26 for initial clamping and fixation. As the gantry crane drives the wire feeding mechanism, the condenser tube is tightened and subjected to tension force. The magnitude of the tension force is caused by the mismatch between the rotational speed of the gantry crane's X and Y drive motors and the feeding speed of the condenser tube. Under the influence of the gantry motor's rotation speed, the condenser material on the wire feed plate 11 moves downwards. The guide wheel 12 is driven to rotate by friction, thereby driving the guide wheel transmission gear 28, which in turn drives the rotor of the DC generator 7 to rotate. As the rotor rotates, the coil cuts the magnetic lines of force, thereby generating an induced current inside. The Hall sensor detects whether the current magnitude corresponds to the optimal tension. By comparing the current corresponding to the optimal tension at the optimal speed with the current corresponding to the current at the current speed, the control system is fed back to adjust and adjust the speed of the gantry X and Y motors. The electrical energy generated by the generator is stored in the battery for use by other equipment, thus achieving both condenser tension control and energy recovery.

[0042] A feeding method for a condenser tube feeder with automatic tension adjustment includes the following steps:

[0043] S1. Manually pass the condenser tube 9 through the guide wheel 8, guide wheel group, steering shaft 31, guide wire groove 24, and guide wire clamp 25 in sequence, and fix its end in the fixing clamp 26.

[0044] S2. The given voltage Ug causes the X-axis lead screw mechanism and the Y-axis lead screw mechanism to operate, so that the condenser tube 9 is pulled out of the guide wire groove 24 by the fixed clamp 26.

[0045] S3, the guide wheel 12 rotates under the friction of the condenser tube 9, driving the synchronous gear 28 of the guide wheel to drive the rotor of the generator 7 to rotate, generating an induced current in the generator 7, using a Hall sensor to detect the magnitude of the induced current generated by the generator 7; and adjusting the running speed of the X-axis lead screw mechanism and the Y-axis lead screw mechanism according to the magnitude of the induced current.

[0046] When the detected induced current increases, the given voltage Ug is reduced, thereby reducing the operating speed of the X-axis lead screw mechanism and the Y-axis lead screw mechanism;

[0047] When the detected induced current decreases, the given voltage Ug is increased, thereby increasing the operating speed of the X-axis lead screw mechanism and the Y-axis lead screw mechanism;

[0048] like Figure 4 As shown, when the system is working, a voltage Ug is first applied to make the speeds of the two servo motors SM (X and Y) of the gantry crane reach the speeds required by the load. The mechanical load refers to the process by which the speed of the servo motor corresponding to the condenser tube tension is converted into the generator speed through the guide wheel and gear transmission. If the load torque decreases, the speed of SM increases, and the speed of the DC tachogenerator TG also increases, causing Ur to increase. The Ur feedback system compares it with Ug, causing the difference voltage Ud = Ug - Ur to decrease. The output voltage SM, i.e., the armature voltage, after being amplified by the amplifier, decreases accordingly, thereby reducing the speed and achieving optimal tension.

[0049] like Figure 5 As shown, the excitation current generates the required magnetic field, which, under the action of external mechanical force, drives the conductor coil to rotate in the magnetic field and continuously cuts the magnetic field lines, generating an induced electromotive force. The induced current is detected by a Hall sensor and fed back to the control system as an electrical signal. Excess electrical energy is stored in the battery, and the controller controls the charging and discharging of the battery.

[0050] The adjustment method for the X-axis lead screw mechanism or Y-axis lead screw mechanism based on the induced current Ia is as follows:

[0051] E a =C e φn=K e n

[0052] U a =E a -I a R a

[0053]

[0054] In the formula: E a To induce electromotive force, C e U is the electromotive force constant, n is the servo motor speed of the X-axis or Y-axis lead screw mechanism, and U is the servo motor speed of the X-axis or Y-axis lead screw mechanism. a For induced voltage, I a For induced current, R a R is the power supply resistor. L This is the load resistance.

Claims

1. A condenser tube feeder with automatic tension adjustment, comprising a gantry frame (1), characterized in that: The bridge feet at both ends of the gantry (1) are respectively mounted on a Y-axis guide rail (20). A Y-axis lead screw bearing seat (18) is installed at one end of the lower top surface of the gantry (1). The Y-axis lead screw bearing seat (18) is connected to an X-axis lead screw mechanism parallel to the Y-axis guide rail (20). An X-axis guide shaft (3) perpendicular to the Y-axis guide rail (20) is installed on the edge of the upper top surface of the gantry (1). Guide shaft bearing seats (2) are installed at both ends of the middle part of the upper top surface of the gantry (1). The two guide shaft bearing seats (2) are connected by an X-axis lead screw (4). A closed-loop motor (16) is installed on one of the guide shaft bearing seats (2) and connected to the X-axis lead screw (4). A robotic arm support plate (6) is installed on the X-axis guide shaft (3). One end of the robotic arm support plate (6) extends out of the end face of the guide shaft bearing seat (2) and a wire feeding plate (11) is installed vertically. A guide wheel (8) is provided on the top of the wire feeding plate (11). A guide wheel assembly is installed on one side of the wire feeding plate (11). A steering mechanism is installed on the bottom upper end face of the wire feeding plate (11). The steering mechanism is connected to the wire guide groove (24) on the bottom lower end face of the wire feeding plate (11). The Y-axis guide rail (20) is installed on the processing table. A fixing fixture (26) and a wire guide fixture (25) are also installed on the table. The clamping jaws of the fixing fixture (26) and the wire guide fixture (25) are on the same straight line.

2. The condenser tube feeder with automatic tension adjustment as described in claim 1, characterized in that: The guide wheel assembly includes several guide wheels (12), which are arranged in two rows vertically on the wire feeding plate (11).

3. The condenser tube feeder with automatic tension adjustment as described in claim 2, characterized in that: The wire feed plate (11) is also equipped with a generator (7) on the side opposite to the guide wheel (12). The guide wheel (12) extends into the generator (7) through a rotating shaft and is connected to the rotor inside the generator (7) through the guide wheel synchronous gear (28).

4. The condenser tube feeder with automatic tension adjustment as described in claim 1, characterized in that: The bottom of the wire feeding plate (11) is fixedly connected to the bottom of the side facing away from the gantry frame (1). The wire feeding base (14) is an L-shaped plate. A triangular plate is provided on each side of the wire feeding base (14). The bottom of the wire feeding base (14) is perpendicular to the wire feeding plate (11). The steering structure and the wire guide groove (24) are respectively installed on the upper and lower end faces of the bottom of the wire feeding base (14).

5. The condenser tube feeder with automatic tension adjustment as described in claim 4, characterized in that: The steering mechanism includes a bearing cover (29), and a deep groove ball bearing (30) is installed at both the upper and lower ends of the bearing cover (29). A steering shaft (31) is installed inside the two deep groove ball bearings (30). The upper end of the steering shaft (31) extends out of the bearing cover (29) and is equipped with a driven gear (23). The lower end of the steering shaft (31) extends out of the bottom of the wire feeding base (14) and is connected to the wire guide groove (24). The driven gear (23) cooperates with the driving gear (22). The driving gear (22) is installed on the servo motor (13). The servo motor (13) is vertically installed at the bottom of the wire feeding base (14).

6. The condenser tube feeder with automatic tension adjustment as described in claim 4, characterized in that: The guide wire groove (24) is a semi-circular annular groove. A pulley is installed on the opening of the annular groove. The pulley and the bottom of the annular groove form a channel for the condenser tube (9) to pass through. One end of the guide wire groove (24) is fixed to the steering shaft (31), and the other end is tightly attached to the processing table.

7. The condenser tube feeder with automatic tension adjustment as described in claim 6, characterized in that: The bottom end of the steering shaft (31) extends into the annular groove of the guide wire groove (24), and an axial through hole is machined in the steering shaft (31).

8. The condenser tube feeder with automatic tension adjustment as described in claim 7, characterized in that: The steering shaft (31) is equipped with a linear bearing.

Images