Automatic control system of automatic green coconut processing machine

Abstract

The utility model discloses an automatic control system of an automatic coconut green processing machine. According to the automatic control system, a PLC serves as a core, a pressing air cylinder is controlled through an electromagnetic valve to enable a pressing air cylinder mechanical arm to act, a coconut is fixed to a rotating nail disc, and a cutting tool is controlled to cut the side portion and the top of the coconut rotating on the rotating nail disc through operation of an electric push rod and a rotating motor; a clamping jaw lifting air cylinder and a clamping jaw opening and closing air cylinder are controlled by an electromagnetic valve to move to achieve clamping jaw lifting and clamping jaw opening and closing, meanwhile, under operation of a stepping motor and a band saw motor, coconut bottom cutting is conducted, and finally coconut green in a regular shape is obtained through processing. The coconut green processing device has the advantages that automation of the coconut green processing process is achieved, processing cost is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an automatic control system for agricultural product processing equipment, in particular to an automatic control system for an automatic young coconut processing machine. Background Art

[0002] Coconut is the fruit of the palm plant coconut tree. It is composed of the exocarp, mesocarp, endocarp, seed coat, coconut meat, coconut water and other parts, and each of its parts has very important use value. Fresh green coconuts are rich in water, so it is difficult to store them for a long time. At the same time, due to the irregular shape of coconuts, they will take up a lot of space during long-distance transportation, consuming a lot of unnecessary costs. Therefore, it is customary to process green coconuts into products with a conical top, a cylindrical side and a flat bottom. This is the green coconut. Soaking and wrapping the processed green coconut can effectively extend its shelf life. Otherwise, its epidermis will age quickly, affecting the taste of juice and pulp and reducing its nutritional value. At present, the green coconut processing machinery is relatively backward, mainly relying on manual cutting, which is time-consuming and labor-intensive, unsafe and unhygienic. This method has low processing efficiency, high labor costs, and is prone to personal accidents, which to a certain extent restricts the development of enterprises. Summary of the invention

[0003] The utility model is to design an automatic control system for an efficient automatic young coconut processing machine. The invention of the automatic control system can realize the full-automatic processing of coconuts of different sizes and shapes into young coconuts with good appearance consistency, solving the bottleneck problem of expanding the production scale and improving work efficiency of coconut processing plants.

[0004] The technical scheme adopted by the utility model is as follows: the automatic coconut green processing machine is provided with a frame, a pressing cylinder is provided at the upper front of the frame, a pressing cylinder manipulator is installed on the pressing cylinder, and the extension and retraction of the pressing cylinder manipulator are controlled by electromagnetic valves YV1 and YV2, a rotating motor M1 is provided at the lower front of the frame, a rotating shaft of the rotating motor M1 is provided with a rotating nail plate, a cutting tool is provided at the top position of the front side of the frame, and the extension and retraction of the cutting tool is controlled by an electric push rod, a band saw and a band saw motor M2 are provided in the middle of the frame, and the band saw motor M2 (18) controls the rotation of the band saw to cut the bottom of the coconut. A stepper motor M4 and a lead screw are provided at the upper rear part of the frame. A clamp is provided in the middle part of the frame. The lead screw is driven by the stepper motor M4 to rotate to move the clamp forward and backward. A travel switch ST1 for the front limit of the clamp and a travel switch ST2 for the rear limit of the clamp are provided. The solenoid valves YV3 and YV4 control the action of the clamp lifting cylinder to raise and lower the clamp. The solenoid valves YV5 and YV6 control the action of the clamp opening and closing cylinder to open and close the clamp.

[0005] The main circuit and control circuit of the automatic control system are installed in the control cabinet, which is provided with manual and automatic modes. The working mode can be selected by the selection switch on the control cabinet panel; the control cabinet panel is equipped with a system start button SB1, a selection switch SA, an emergency stop button SB2, a manual button SB1, a manual button SB2, a manual button SB3, a manual button SB4, a manual button SB5, a manual button SB6, a manual button SB7, a manual button SB8, a manual button SB9, a manual button SB 10 , Manual button SB 11 , Manual button SB 12 , Manual button SB 13 , Manual button SB 14 , Manual button SB 15 , Manual button SB 16 , Manual button SB 17 , Manual button SB 18 The control cabinet is equipped with: air switch QS1, air switch QS2, air switch QS3, air switch QS4, air switch QS5, programmable logic controller PLC, intermediate relay KA1, intermediate relay KA2, intermediate relay KA3, intermediate relay KA4, intermediate relay KA5, intermediate relay KA6, intermediate relay KA7, intermediate relay KA8, intermediate relay KA9, intermediate relay KA 10 、Intermediate relay KA 11 , YF-20 stepper motor controller, DM542 stepper motor driver, 24V switching power supply, thermal relay FR1, thermal relay FR2, AC contactor KM0, AC contactor KM1, AC contactor KM2 and wiring terminals. In order to explain in detail the functions of each component of the electrical automatic control system and the allocation of PLC input addresses and output addresses, Table 1, Table 2 and Table 3 are given for explanation.

[0006] Table 1 Circuit component description

[0007] Component Symbol Component Name Implementing functions <![CDATA[QS1]]> Air switch Total three-phase power supply introduction and short-circuit protection <![CDATA[QS2]]> Air switch <![CDATA[Three-phase power supply and short-circuit protection for rotating electrical machine M1]]> <![CDATA[QS3]]> Air switch <![CDATA[Three-phase power supply and short-circuit protection for band saw motor M2]]> <![CDATA[QS4]]> Air switch Single-phase power supply introduction and short-circuit protection between PLC and intermediate relay <![CDATA[QS5]]> Air switch AC contactor power supply introduction and short circuit protection FU Fuse Total three-phase power short circuit protection <![CDATA[FR1]]> Thermal relay <![CDATA[Overload protection of rotating electrical machine M1]]> <![CDATA[FR2]]> Thermal relay <![CDATA[Overload protection for the band saw motor M2]]> <![CDATA[KM0]]> AC contactor Control the power supply of PLC, output load and inverter, and disconnect it when emergency stop <![CDATA[KM1]]> AC contactor <![CDATA[Control the operation of the rotating motor M1]]> <![CDATA[KM2]]> AC contactor <![CDATA[Control the operation of the band saw motor M2]]> <![CDATA[KA1]]> Intermediate relay <![CDATA[Control the on / off of the coil of AC contactor KM1]]> <![CDATA[KA2]]> Intermediate relay <![CDATA[Control the on / off of the coil of AC contactor KM2]]> <![CDATA[KA3]]> Intermediate relay Control the electric push rod to extend <![CDATA[KA4]]> Intermediate relay Control the electric push rod to retract <![CDATA[KA5]]> Intermediate relay <![CDATA[Control the solenoid valve YV1 to operate, causing the clamping cylinder to actuate and the clamping cylinder manipulator to extend]]> <![CDATA[KA6]]> Intermediate relay <![CDATA[Control the solenoid valve YV2 to operate, causing the clamping cylinder to actuate and the clamping cylinder manipulator to retract]]> <![CDATA[KA7]]> Intermediate relay <![CDATA[Control the solenoid valve YV3 to operate the gripper lifting cylinder, and the gripper extends]]> <![CDATA[KA8]]> Intermediate relay <![CDATA[Control the solenoid valve YV4 to operate the gripper lifting cylinder, and retract the gripper]]> <![CDATA[KA9]]> Intermediate relay <![CDATA[Control the solenoid valve YV5 to work to make the jaw opening and closing cylinder act, and the jaws open]]> <![CDATA[KA 10 ]]> Intermediate relay <![CDATA[Control the solenoid valve YV6 to operate the jaw opening and closing cylinder, and the jaws close]]> UR DC Power Supply 24V power supply for electric actuators and drivers <![CDATA[M1]]> Motor <![CDATA[Control the operation of the rotating motor M1]]> <![CDATA[M2]]> Motor <![CDATA[Control the operation of the band saw motor M2]]> <![CDATA[M3]]> Motor <![CDATA[Control the operation of the air pump motor M3]]> <![CDATA[M4]]> Motor <![CDATA[Control the operation of the stepper motor M4]]> <![CDATA[YV1]]> Solenoid valve Control the clamping cylinder to extend the clamping cylinder manipulator <![CDATA[YV2]]> Solenoid valve Control the clamping cylinder to retract the clamping cylinder manipulator <![CDATA[YV3]]> Solenoid valve Control the gripper lifting cylinder to extend the gripper <![CDATA[YV4]]> Solenoid valve Control the jaw lifting cylinder to retract the jaws <![CDATA[YV5]]> Solenoid valve Control the jaw opening and closing cylinder to open the jaws <![CDATA[YV6]]> Solenoid valve Control the jaw opening and closing cylinder to close the jaws

[0008] Table 2 Input signal and address allocation table

[0009] Component Name address Implementing functions <![CDATA[Button SB1]]> System Startup <![CDATA[Button SB2]]> Emergency Stop <![CDATA[Button SB3]]> X000 Control the clamping cylinder to extend the clamping cylinder manipulator <![CDATA[Button SB4]]> X001 Control the clamping cylinder to retract the clamping cylinder manipulator <![CDATA[Button SB5]]> X002 Control the rotary motor to rotate the rotary nail plate <![CDATA[Button SB6]]> X003 Control the electric push rod to extend the cutting tool <![CDATA[Button SB7]]> X004 Control the electric push rod to retract the cutting tool <![CDATA[Button SB8]]> X005 Control the stepper motor to rotate forward to make the gripper move forward <![CDATA[Button SB9]]> X006 Control the stepper motor to reverse and make the gripper move back <![CDATA[Button SB 10 > X007 Control the gripper lifting cylinder to extend the gripper <![CDATA[Button SB 11 > X010 Control the jaw lifting cylinder to retract the jaws <![CDATA[Button SB 12 > X011 Control the jaw opening and closing cylinder to open the jaws <![CDATA[Button SB 13 > X012 Control the jaw opening and closing cylinder to close the jaws <![CDATA[Button SB 14 > X013 Control the band saw motor to run and the band saw rotates <![CDATA[Button SB 15 > X015 Coconut placement detection <![CDATA[Selector switch SA1]]> X020 Manual Mode <![CDATA[Selector switch SA2]]> X021 Origin return mode <![CDATA[Selector switch SA3]]> X022 Single-step mode <![CDATA[Selector switch SA4]]> X023 Single cycle mode <![CDATA[Selector switch SA5]]> X024 Automatic mode <![CDATA[Button SB 16 > X025 Homing start <![CDATA[Button SB 17 > X026 Automatic Start <![CDATA[Button SB 18 > X027 Automatic stop <![CDATA[Travel switch ST1]]> X030 Gripper forward limit <![CDATA[Travel switch ST2]]> X031 Gripper back limit

[0010] Table 3 Output signal and address allocation table

[0011] Component Name address Implementing functions <![CDATA[KA1]]> Y004 <![CDATA[Energize the KM1 coil to make the rotating motor M1 run]]> <![CDATA[KA2]]> Y005 <![CDATA[Energize the KM2 coil to make the band saw motor M2 operate]]> <![CDATA[KA3]]> Y006 Control the electric push rod to extend the cutting tool <![CDATA[KA4]]> Y007 Control the electric push rod to retract the cutting tool <![CDATA[KA5]]> Y010 <![CDATA[Control the solenoid valve YV1 to operate, causing the clamping cylinder to actuate and the clamping cylinder manipulator to extend]]> <![CDATA[KA6]]> Y011 <![CDATA[Control the solenoid valve YV2 to operate and make the clamping cylinder act, and the clamping cylinder manipulator retracts]]> <![CDATA[KA7]]> Y012 <![CDATA[Control the solenoid valve YV3 to operate the gripper lifting cylinder, and the gripper extends]]> <![CDATA[KA8]]> Y013 <![CDATA[Control the solenoid valve YV4 to operate the gripper lifting cylinder, and the gripper retracts]]> <![CDATA[KA9]]> Y014 <![CDATA[Control the solenoid valve YV5 to operate the gripper opening and closing cylinder, and the gripper opens]]> <![CDATA[KA 10 ]]> Y015 <![CDATA[Control the solenoid valve YV6 to work to make the jaw opening and closing cylinder act, and the jaws close]]> <![CDATA[KA 11 ]]> Y016 <![CDATA[Control system startup indicator light L1]]> <![CDATA[L2]]> Y017 Origin return mode operation instructions <![CDATA[L3]]> Y018 Automatic mode operation indication

[0012] After the system is powered on, first press the system start button SB1, then turn the selector switch SA to the 2nd gear (origin return mode), and press the origin return start manual button SB 16, the system will return to the origin, after which the selector switch SA will be turned to the 5th gear (automatic mode), and the automatic start button SB will be pressed 17 , the coconut processing machine enters the automatic mode, and the specific control of the automatic mode is:

[0013] Place the coconut upright on the rotating nail plate with the top facing up. Press the manual button SB after it is in place. 15 , the coil of the intermediate relay KA5 is energized, so that the solenoid valve YV1 works to control the action of the clamping cylinder to extend the clamping cylinder manipulator, press the coconut down and fix it on the rotating nail plate. After 2 seconds, the coil of the intermediate relay KA1 is energized, so that the coil of the AC contactor KM1 is energized, and the normally open contact of the AC contactor KM1 is closed, and the rotating motor M1 starts and the coconut on the rotating nail plate starts to rotate. The electric push rod is pushed out to make the cutting tool approach the coconut. When the cutting tool touches the coconut, it starts to cut the side and top of the coconut. After 15 seconds, the coil of the intermediate relay KA1 loses power, so that the coil of the AC contactor KM1 loses power, and the normally open contact of the AC contactor KM1 is disconnected, and the rotating motor M1 The electric push rod stops, and the cutting tool is retracted to move away from the coconut. The stepper motor controller and the stepper motor driver receive the signal from the PLC, and control the stepper motor M4 to rotate forward, so that the lead screw (73) rotates and drives the clamping jaw forward. The coil of the intermediate relay KA9 is energized, so that the solenoid valve YV5 works to control the clamping jaw opening and closing cylinder to move the clamping jaw. After 2 seconds, the coil of the intermediate relay KA7 is energized, so that the solenoid valve YV3 works to control the clamping jaw lifting cylinder to move the clamping jaw down. When the clamping jaw touches the travel switch ST1 of the front limit, the travel switch ST1 is activated, and the PLC sends a stop signal to the stepper motor controller and the driver, and the stepper motor M4 stops rotating forward. At this time, the intermediate relay KA 10The coil is energized, solenoid valve YV6 controls the jaw opening and closing cylinder to close the jaws and grab the coconut that has been cut on the sides and top. One second later, the coil of the intermediate relay KA6 is energized, solenoid valve YV2 controls the clamping cylinder to retract the clamping cylinder manipulator. Two seconds later, the coil of the intermediate relay KA8 is energized, solenoid valve YV4 controls the jaw lifting cylinder to raise the jaws and remove the coconut from the rotating nail plate. The stepper motor controller and the stepper motor driver receive the signal from the PLC and control the stepper motor M4 to reverse, causing the lead screw to rotate and drive the jaws and coconut to retreat. After 3 seconds of retreat, the coil of the intermediate relay KA2 is energized, causing the coil of the AC contactor KM2 to be energized, and the normally open contact of the AC contactor KM2 is closed, and the band saw motor M2 runs, driving the band saw to rotate. Two seconds later, the coil of the intermediate relay KA7 is energized, solenoid valve YV3 controls the clamping The claw lifting cylinder moves to lower the claw, bringing the bottom of the coconut close to the band saw. The stepper motor M4 continues to reverse, and the claw grabs the coconut and continues to move backward. The bottom of the coconut is cut under the rotation of the band saw. When the claw touches the rear limit travel switch ST2, the travel switch ST2 is activated, the intermediate relay KA2 coil loses power, causing the AC contactor KM2 coil to lose power, the normally open contact of the AC contactor KM2 is disconnected, the band saw motor M2 stops, and the PLC sends a stop signal to the stepper motor controller and the stepper motor driver. The stepper motor M4 stops, and the intermediate relay KA9 coil is energized, so that the solenoid valve YV5 works to control the claw opening and closing cylinder to open the claw and place the processed coconut at the discharge port. After 2 seconds, the intermediate relay KA8 coil is energized, so that the solenoid valve YV4 works to control the claw lifting cylinder to raise and retract the claw, completing an automatic coconut processing.

[0014] In order to meet the requirements of debugging, maintenance and separate control, the system is equipped with a manual control mode. When the selection switch SA is turned to position 1 (manual mode), the coconut processing equipment enters the manual control mode. The specific operations are as follows: press the manual button SB3 to energize the coil of the intermediate relay KA5, control the solenoid valve YV1 to control the action of the clamping cylinder to extend the clamping cylinder manipulator, and fix the coconut on the rotating nail plate; press the manual button SB4 to energize the coil of the intermediate relay KA5, control the action of the solenoid valve YV2 to control the action of the clamping cylinder to retract the clamping cylinder manipulator; press the manual button SB5 to energize the coil of the intermediate relay KA1. Press the manual button SB6 to energize the coil of the intermediate relay KA3, control the electric push rod to extend the cutting tool; press the manual button SB7 to energize the coil of the intermediate relay KA4, control the electric push rod to retract the cutting tool; press the manual button SB8 to make the PLC output signals to the stepper motor driver and the stepper motor controller to control the forward rotation of the stepper motor; press the manual button SB9 to make the PLC output signals to the stepper motor driver and the stepper motor controller to control the reverse rotation of the stepper motor; press the manual button SB 10 The coil of the intermediate relay KA7 is energized to control the solenoid valve YV3 to operate and control the action of the gripper lifting cylinder to extend and lower the gripper; press the manual button SB 11 The coil of the intermediate relay KA8 is energized to control the solenoid valve YV4 to operate and control the action of the gripper lifting cylinder to raise and retract the gripper; press the manual button SB 12 The coil of the intermediate relay KA9 is energized to control the solenoid valve YV5 to operate and control the jaw opening and closing cylinder to move the jaws open; press the manual button SB 13 Make the intermediate relay KA 10 The coil is energized to control the solenoid valve YV6 to work and control the jaw opening and closing cylinder to move the jaws to close. The above is the operating process of the control system when working in manual mode and the action sequence of each actuator.

[0015] In the control circuit, the PLC controls the on and off of the coils of each intermediate relay to realize the on and off of the contacts, control the on and off of the power supply of the corresponding AC contactor coil and other loads, and the intermediate relays that control the opposite actions of the same actuator are interlocked to ensure the safety of the circuit and equipment.

[0016] In case of emergency, the emergency stop button SB2 should be pressed immediately. This operation can quickly and effectively disconnect the output of the programmable controller, thereby controlling the disconnection of all AC contactors, cutting off the power supply to all motors, and stopping the running equipment immediately, so as to avoid major safety hazards or equipment damage in emergencies; the button adopts a self-locking working mode and will self-lock after being pressed. If the self-locking is not released, the system will not be able to start and the entire equipment will not work.

[0017] For the main circuit, when a short circuit occurs in the circuit, the main power air switch SQ1 has a short circuit protection function. When the current exceeds a given value, it will automatically trip and cut off the circuit. At the same time, the motors of the actuators of each part of the main circuit are individually connected to the air switches, which can play an independent protection role, thereby protecting the safety of operators and equipment in the production process; for the control circuit, the air switches SQ4 and SQ5 have a short circuit protection function; the fuse FU is used to assist in the short circuit protection role, ensuring that in the case of overcurrent, the power supply of the programmable controller (PLC) is cut off to protect the PLC from the harm of overcurrent. Thermal relays (FR) are introduced into the corresponding motors of the actuators of each part, and the thermal relay has the function of overload protection. When the motor is overheated due to overload, the normally closed auxiliary contacts of the corresponding thermal relay will be disconnected, thereby controlling the motor to lose power, thereby ensuring the safe operation of each motor in the production process.

[0018] The beneficial effect of the utility model is that the processing of young coconuts is changed from manual operation to automatic operation, the automation of the processing of young coconuts is realized, the production cost can be greatly reduced, and the economic benefits of the young coconut production enterprises are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a diagram showing the mechanical structure and electrical component arrangement of an electrical automatic control system according to an embodiment of the utility model.

[0020] Figure 2 It is a main circuit principle diagram of the electric automatic control system of the embodiment of the utility model.

[0021] Figure 3 It is an external principle wiring diagram of a PLC control circuit of an electric automatic control system according to an embodiment of the utility model.

[0022] Figure 4 The utility model is a relay-contactor circuit schematic diagram of an electric automatic control system according to an embodiment of the utility model.

[0023] Figure 5 It is a layout diagram of a control cabinet panel of an electric automatic control system of an embodiment of the utility model.

[0024] Figure 6 It is a layout diagram of control cabinet components of an electric automatic control system according to an embodiment of the utility model.

[0025] Figure 7 It is a program flow chart of a programmable controller (PLC) of an electric automatic control system according to an embodiment of the utility model.

[0026] In the figure, 1. Rotating motor M1 2. Rotating nail plate 3. Cutting tool 4. Electric push rod 5. Clamping cylinder 6. Solenoid valve YV1 7. Solenoid valve YV2 8. Travel switch ST1 9. Gripper lifting cylinder 10. Stepper motor M4 11. Travel switch ST2 12. Solenoid valve YV3 13. Solenoid valve YV4 14. Solenoid valve YV5 15. Solenoid valve YV6 16. Gripper opening and closing cylinder 17. Gripper 18. Band saw motor M2 19. Band saw 20. Selection switch SA 21. System start button SB1 (with built-in indicator light L2) 22. Origin return start manual button SB 16 (With indicator light L2) 23. Automatic start button SB 15 (With indicator light L3) 24. Manual button SB4 25. Manual button SB3 26. Manual button SB7 27. Manual button SB6 28. Manual button SB 13 29. Manual button SB 12 30. Manual button SB 15 31. Manual button SB 10 32. Manual button SB 11 33. Manual button SB8 34. Manual button SB9 35. Manual button SB5 36. Manual button SB 14 37. Emergency stop button SB2 38. Automatic stop manual button SB 18 39. Control cabinet panel 41. Air switch QS4 42. Air switch QS3 43. Air switch QS2 44. Air switch QS1 45. PLC 46. Intermediate relay KA5 47. Intermediate relay KA4 48. Intermediate relay KA3 49. Intermediate relay KA2 50. Intermediate relay KA1 51.24V switching power supply 52. ​​Stepper motor driver 53. Stepper motor controller 54. Terminal block 55. Thermal relay FR2 56. Thermal relay FR1 57. Intermediate relay KA 11 58.Intermediate relay KA 10 59. Intermediate relay KA9 60. Intermediate relay KA8 61. Intermediate relay KA7 62. Intermediate relay KA6 63. AC contactor KM0 64. AC contactor KM2 65. AC contactor KM1 66. Air switch QS567. Control cabinet 68. Rack 69. Clamping cylinder manipulator 70. Screw. DETAILED DESCRIPTION

[0027] The technical scheme adopted by the utility model is as follows: the automatic coconut green processing machine is provided with a frame (68), a pressing cylinder (5) is provided at the upper front part of the frame (68), a pressing cylinder manipulator (69) is installed on the pressing cylinder (5), and the extension and retraction of the pressing cylinder manipulator (69) are controlled by electromagnetic valves YV1 (6) and electromagnetic valves YV2 (7), a rotating motor M1 (1) is provided at the lower front part of the frame (68), a rotating nail plate (2) is installed on the rotating shaft of the rotating motor M1 (1), a cutting tool (3) is provided at the top position of the side of the front part of the frame (68), and the extension and retraction of the cutting tool (3) are controlled by an electric push rod (4), a band saw (19) and a band saw motor M2 (18) are provided in the middle part of the frame (68), and the band saw motor M2 (18) is controlled by the band saw motor The band saw (19) is controlled to rotate to cut the bottom of the coconut. A stepper motor M4 (10) and a lead screw (70) are provided at the upper rear portion of the frame (68). A clamping jaw (17) is provided in the middle portion of the frame (68). The lead screw (70) is driven by the stepper motor M4 (10) to rotate so as to realize the forward and backward movement of the clamping jaw (17). A travel switch ST1 (8) for the front limit of the clamping jaw (17) and a travel switch ST2 (11) for the rear limit are provided. The solenoid valve YV3 (12) and the solenoid valve YV4 (13) control the action of the clamping jaw lifting cylinder (9) to realize the raising and lowering of the clamping jaw (17). The solenoid valve YV5 (14) and the solenoid valve YV6 (15) control the action of the clamping jaw opening and closing cylinder (16) to realize the opening and closing of the clamping jaw (17).

[0028] After the system is powered on, first press the system start button SB1 (21), then turn the selector switch SA (20) to the 2nd gear position (origin return mode), and press the origin return start manual button SB 16 (22), the system returns to the origin. After completion, turn the selector switch SA (20) to the 5th gear (automatic mode) and press the automatic start button SB 17 (23), the coconut processing machine enters the automatic mode, and the specific control of the automatic mode is:

[0029] Place the coconut upright on the rotating nail plate (2) with the top facing upwards. Once it is in place, press the manual button SB. 15(30), the coil of the intermediate relay KA5 (46) is energized, so that the solenoid valve YV1 (6) operates to control the pressing cylinder (5) to move the pressing cylinder manipulator (69) to extend, pressing the coconut down and fixing it on the rotating nail plate (2). After 2 seconds, the coil of the intermediate relay KA1 (50) is energized, so that the coil of the AC contactor KM1 (65) is energized, and the normally open contacts of the AC contactor KM1 (65) are closed, the rotating motor M1 (1) is started and the coconut on the rotating nail plate (2) begins to rotate, and the electric push rod (4) is pushed out, so that the cutting tool (3) approaches the coconut. When the cutting tool (3) contacts the coconut, it starts to cut the sides and top of the coconut. After 15 seconds, the coil of the intermediate relay KA1 (50) is de-energized, so that the coil of the AC contactor KM1 (65) is de-energized, and the normally open contacts of the AC contactor KM1 (65) are disconnected, the rotating motor M1 (1) stops, and the electric push rod (4) is pushed out. The stepper motor controller (53) and the stepper motor driver (52) receive the signal from the PLC (45) and control the stepper motor M4 (10) to rotate forward, causing the lead screw (70) to rotate and drive the clamping jaw (17) forward. The coil of the intermediate relay KA9 (59) is energized, causing the solenoid valve YV5 (14) to work and control the clamping jaw opening and closing cylinder (16) to move so that the clamping jaw (17) opens. After 2 seconds, the coil of the intermediate relay KA7 (61) is energized, causing the solenoid valve YV3 (12) to work and control the clamping jaw lifting cylinder (9) to move so that the clamping jaw (17) descends. When the clamping jaw (17) touches the travel switch ST1 (8) of the front limit, the travel switch ST1 (8) is activated, and the PLC (45) sends a stop signal to the stepper motor controller (53) and the driver (52), and the stepper motor M4 (10) stops rotating forward. At this time, the intermediate relay KA 10The coil (58) is energized, causing the solenoid valve YV6 (15) to operate and control the jaw opening and closing cylinder (16) to move the jaw (17) to close and grab the coconut after cutting the sides and top. One second later, the coil of the intermediate relay KA6 (62) is energized, causing the solenoid valve YV2 (7) to operate and control the clamping cylinder (5) to move the clamping cylinder manipulator (69) to retract. Two seconds later, the coil of the intermediate relay KA8 (60) is energized, causing the solenoid valve YV4 (13) to operate and control the jaw lifting cylinder (9) to move the jaw (17) to rise and remove the coconut from the rotating nail plate (2). The machine controller (53) and the stepper motor driver (52) receive the signal from the PLC (45) and control the stepper motor M4 (10) to reverse, so that the lead screw (70) rotates and drives the clamping claw (17) and the coconut to move backward. After 3 seconds of moving backward, the coil of the intermediate relay KA2 (49) is energized, so that the coil of the AC contactor KM2 (64) is energized, and the normally open contact of the AC contactor KM2 (64) is closed, and the band saw motor M2 (18) runs, driving the band saw (19) to rotate. After 2 seconds, the coil of the intermediate relay KA7 (61) is energized, so that the solenoid valve YV3 (12) works and controls The jaw lifting cylinder (9) is actuated to lower the jaw (17), bringing the bottom of the coconut closer to the band saw (19). The stepper motor M4 (10) continues to reverse, and the jaw (17) continues to move backward after grasping the coconut. The bottom of the coconut is cut under the rotation of the band saw (19). When the jaw (17) touches the travel switch ST2 (11) of the rear limit, the travel switch ST2 (11) is actuated, the coil of the intermediate relay KA2 (49) is de-energized, causing the coil of the AC contactor KM2 (64) to be de-energized. The normally open contact of the AC contactor KM2 (64) is disconnected, and the band saw motor M2 (18) is turned on. The PLC (45) sends a stop signal to the stepper motor controller (53) and the stepper motor driver (52), the stepper motor M4 (10) stops, the coil of the intermediate relay KA9 (59) is energized, the solenoid valve YV5 (14) operates to control the jaw opening and closing cylinder (16) to move the jaws (17) to open and place the processed coconut at the discharge port. After 2 seconds, the coil of the intermediate relay KA8 (60) is energized, the solenoid valve YV4 (13) operates to control the jaw lifting cylinder (9) to move the jaws (17) to rise and retract, completing one automatic coconut processing.

Claims

1. An automatic control system for an automatic young coconut processing machine, characterized in that: A frame (68) is provided, a clamping cylinder (5) is provided at the upper front of the frame (68), a clamping cylinder manipulator (69) is installed on the clamping cylinder (5), and the extension and retraction of the clamping cylinder manipulator (69) are controlled by electromagnetic valves YV1 (6) and electromagnetic valves YV2 (7), a rotating motor M1 (1) is provided at the lower front of the frame (68), a rotating nail plate (2) is installed on the rotating shaft of the rotating motor M1 (1), a cutting tool (3) is provided at the top position of the front side of the frame (68), and the extension and retraction of the cutting tool (3) are controlled by an electric push rod (4), and a band saw (19) and a band saw motor M2 (18) are provided in the middle of the frame (68), and the band saw motor M2 (18) controls the rotation of the band saw (19) To cut the bottom of coconut, a stepper motor M4 (10) and a lead screw (70) are provided at the upper rear part of the frame (68), and a clamping jaw (17) is provided in the middle part of the frame (68). The lead screw (70) is driven by the stepper motor M4 (10) to rotate so as to realize the forward and backward movement of the clamping jaw (17). A travel switch ST1 (8) for the front limit of the clamping jaw (17) and a travel switch ST2 (11) for the rear limit are provided. The electromagnetic valve YV3 (12) and the electromagnetic valve YV4 (13) control the action of the clamping jaw lifting cylinder (9) to realize the rise and fall of the clamping jaw (17), and the electromagnetic valve YV5 (14) and the electromagnetic valve YV6 (15) control the action of the clamping jaw opening and closing cylinder (16) to realize the opening and closing of the clamping jaw (17).

2. The automatic control system of an automatic coconut processing machine according to claim 1, characterized in that: The control system main circuit and the control circuit are installed in the control cabinet (67), and are provided with manual and automatic modes. The working mode can be selected by the selection switch SA (20) on the control cabinet panel (39); the control cabinet panel (39) is provided with the selection switch SA (20), the system start button SB1 (21), the button SB 16 (22) Manual button SB 17 (23), manual button SB4 (24), manual button SB3 (25), manual button SB7 (26), manual button SB6 (27), manual button SB 13 (28) Manual button SB 12 (29) Manual button SB 15 (30) Manual button SB 10 (31) Manual button SB 11 (32), manual button SB8 (33), manual button SB9 (34), manual button SB5 (35), manual button SB 14 (36), emergency stop button SB2 (37), manual button SB 18 (38); The control cabinet (40) is equipped with: air switch QS4 (41), air switch QS3 (42), air switch QS2 (43), air switch QS1 (44), programmable logic controller PLC (45), intermediate relay KA5 (46), intermediate relay KA4 (47), intermediate relay KA3 (48), intermediate relay KA2 (49), intermediate relay KA1 (50), 24V switching power supply (51), DM542 stepper motor driver (52), YF-20 stepper motor controller (53), terminal block (54), thermal relay FR2 (55), thermal relay FR1 (56), intermediate relay KA 11 (57), Intermediate relay KA 10 (58), intermediate relay KA9 (59), intermediate relay KA8 (60), intermediate relay KA7 (61), intermediate relay KA6 (62), AC contactor KM0 (63), AC contactor KM2 (64), AC contactor KM1 (65), air switch QS5 (66).

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