Intelligent quantitative equipment for glue supply system and use method thereof

Abstract

The application discloses a kind of intelligent quantitative equipment in glue supply system and its use method, glue material is pumped into by glue pump, enters quantitative machine by glue valve, is quantified by quantitative machine, finally is shot by glue gun, carries out gluing operation, wherein, quantitative machine utilizes the cooperation structure of servo motor, screw rod, screw nut, push rod, under the rotary drive of servo motor, drive screw rod to rotate, then by screw nut, rotation is converted into linear motion to push push rod and realize pushing material, the moving speed of screw rod is controlled by controlling the rotating speed of servo motor, to reach the purpose of glue material extrusion according to set speed, in the process of glue material through glue valve, quantitative machine, glue gun, respectively by corresponding first heating element, second heating element, third heating element is coordinated and temperature controlled, ensure that the glue temperature at glue gun is consistent with the preset glue temperature required, so as to ensure the glue output, glue speed, glue precision under the control of specific temperature.

Description

Technical Field

[0001] This invention relates to the field of adhesive application technology for automobile body manufacturing. More specifically, this invention relates to an intelligent metering device in an adhesive supply system and its method of use. Background Technology

[0002] The metering equipment in the glue supply system used to employ a combination of motor and gear pump, but it was not as precise as a metering machine. A closer technology is the use of a combination of motor and rack and pinion, which converts the rotation of the motor into the linear motion of the rack. By controlling the speed and pause of the motor, the target can be switched between multiple working positions. The drawback is that it occupies a large space. In addition, while achieving the metering function, the metering cylinders of domestic brands generally exhibit poor airtightness. The control of each stage of the glue application process is mainly achieved by directly issuing relevant glue dispensing commands through the control terminal, lacking intelligent control design. The glue dispensing volume and accuracy of the glue supply system are difficult to guarantee in long-term use. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] Another objective of this invention is to provide an intelligent quantitative device and its usage method in a glue supply system, in order to solve the problem that existing glue supply systems lack precise control over temperature and other parameters in the equipment used for quantitative glue dispensing, making it difficult to guarantee the glue dispensing volume and accuracy of the glue supply system during long-term use.

[0005] To achieve these objectives and other advantages according to the present invention, an intelligent metering device for a glue supply system is provided, comprising:

[0006] A dispensing machine has an axially continuous inner side, with a movable chamber and a filling chamber arranged sequentially along the axial direction. The cross-sectional dimension of the movable chamber is larger than that of the filling chamber. A lead screw is arranged axially inside the movable chamber. The outer side of the lead screw, away from the filling chamber, is mounted in the movable chamber via a connecting bearing. After the lead screw extends out of the movable chamber, a reducer and a servo motor are connected sequentially along the coaxial direction. The outer side of the other end of the lead screw is connected to a lead screw nut via a thread. On the side of the lead screw nut facing away from the bearing, a push rod is connected via a thread along the axial direction of the dispensing machine. The push rod extends towards the filling chamber and is slidably sealed against the inner wall of the filling chamber. The lead screw nut moves axially along the filling chamber under the limitation of the inner wall of the filling chamber. A glue inlet channel is radially opened outward at the end of the filling chamber near the movable chamber, and a glue outlet channel is radially opened outward at the end of the filling chamber away from the movable chamber. A pressure sensor is installed on the glue outlet channel. A first heating element and a first temperature sensor are arranged on the filling chamber and the glue outlet channel.

[0007] A glue gun has a glue inlet that is connected to a glue outlet channel. The glue gun is used to dispense glue. The glue gun also has a second heating element and a second temperature sensor inside.

[0008] The glue inlet valve has an outlet at one end and a feed inlet at the other end. The outlet is connected to the glue inlet channel, and the feed inlet is used to connect to the glue pump. The glue inlet valve is used to control whether to deliver glue to the glue inlet channel. The glue inlet valve is also equipped with a third heating element and a third temperature sensor.

[0009] Preferably, a sealing element is embedded in the inner wall of the end of the packing chamber near the movable cavity. The sealing element includes a plurality of first sealing rings arranged along the axial direction of the packing chamber. The inner side of the first sealing ring is used to slide with the outer side of the push rod. A screw lubricating grease pipe and a first sealing ring lubricating oil pipe are provided on the outer side of the movable cavity. The screw lubricating grease pipe is connected to the outer side of the screw, and the first sealing ring lubricating oil pipe is connected to the location of the first sealing ring.

[0010] Preferably, a guide rod is fixed along the axial direction of the movable cavity near the inner wall, and a sliding sleeve is connected to the outer side of the lead screw nut. The end of the sliding sleeve away from the lead screw nut is sleeved on the guide rod and slidably connected to the guide rod.

[0011] Preferably, the glue gun includes a gun body, an inner cavity with a nozzle at one end of the cavity, a glue outlet channel on the inner side of the nozzle, and a glue outlet at the end of the glue outlet channel. A first heating groove is located in the middle of the gun body, and the glue inlet is located on the side wall of the first heating groove. The glue inlet extends axially along the gun body and communicates with the glue outlet channel. A first valve needle is located inside the gun body facing the glue outlet channel. One end of the first valve needle passes through the first heating groove and extends into the glue outlet channel, completely blocking the glue outlet. The other end of the first valve needle is coaxially fixed with a second... A piston is provided, with a sealed sliding connection between the first piston and the inner wall of the gun body. A first spring is connected between the first piston and the corresponding top wall of the gun body. The first spring is used to push the first piston towards the glue outlet, so that the first valve needle blocks the glue outlet. A first air control valve is also provided at the end of the gun body where the first piston is located. The air outlet of the first air control valve is connected to the space where the first spring is located, and is used to drive the first piston to move back and forth towards the glue outlet by adjusting the air pressure. The second heating element is arranged on the first heating tank and the nozzle, respectively. The second temperature sensor is arranged on the first heating tank.

[0012] Preferably, a second sealing ring is provided between the first valve needle and the first heating groove, and a second sealing ring lubricating oil pipe is provided on the outside of the gun body, the second sealing ring lubricating oil pipe being connected to the location of the second sealing ring.

[0013] Preferably, the glue inlet valve includes a valve body with an inner cavity and a discharge end connected to one end of the cavity. A discharge channel is formed within the discharge end, with the outer end of the channel being the discharge port and the inner end being the inlet. A second heating groove is provided on the side of the valve body near the discharge end. The inlet is formed on the side wall of the second heating groove and extends axially inclined to the valve body, communicating with the inlet. A second valve needle is provided within the valve body facing the discharge channel. One end of the second valve needle penetrates the second heating groove and extends into the inlet, completely blocking it. The other end of the second valve needle... A second piston is coaxially fixed, and the second piston is slidably connected to the inner wall of the valve body. A second spring is connected between the second piston and the corresponding top wall of the valve body. The second spring is used to push the second piston toward the feed port, so that the second valve needle blocks the feed port. A second pneumatic valve is provided at the end of the valve body where the second piston is located. The air outlet of the second pneumatic valve is connected to the space where the second spring is located, and is used to drive the second piston to move back and forth toward the feed port by adjusting the air pressure. The third heating element is arranged on the second heating tank and the discharge end, respectively. The third temperature sensor is provided on the second heating tank.

[0014] Preferably, a third sealing ring is provided between the second valve needle and the second heating groove, and a third sealing ring lubricating oil pipe is provided on the outside of the valve body, the third sealing ring lubricating oil pipe being connected to the location of the third sealing ring.

[0015] The present invention also provides a method for using an intelligent metering device in a glue supply system, comprising the following steps:

[0016] S1. Test and optimize the dispensing volume, dispensing accuracy, temperature, pressure and airtightness of the intelligent quantitative device in the glue supply system;

[0017] S2. The glue inlet valve is opened, and the glue gun is closed;

[0018] S3. The glue pump feeds glue through the inlet, which enters the glue inlet channel to fill the filler chamber, and then the glue inlet valve is closed.

[0019] S4. The servo motor drives the lead screw to rotate, which in turn drives the lead screw nut and the push rod to push the adhesive material into the filling chamber, pre-compressing the adhesive material in the filling chamber to a set value.

[0020] S5. The glue gun is opened and begins to dispense glue rapidly. At the same time, the servo motor continues to rotate, pushing the push rod forward to push the material. After the glue in the filler chamber is used up, the next cycle begins.

[0021] 9. Preferably, a control system is further provided between the intelligent metering device in the glue supply system and the glue pump. The control system includes a PLC controller and an input panel that are electrically connected to each other. The first heating element, the second heating element, the third heating element, the first temperature sensor, the second temperature sensor, the third temperature sensor, the servo motor, the first pneumatic control valve, and the second pneumatic control valve are respectively electrically connected to the PLC controller. Step S1 specifically includes the following steps:

[0022] A1. Dynamic test: First, at room temperature, fill the equipment with auxiliary materials grease, sealant, and structural adhesive in sequence. Set the pressure of the glue pump to 160-200 bar and the glue application speed to 10-15 cm³ / s for testing. Check the sealing of the metering machine, glue gun, and glue inlet valve to check for leaks. Then, activate all the first heating elements, the second heating elements, and the third heating elements, fill with structural adhesive for auxiliary materials, and test under the same set conditions. After that, disassemble the machine for inspection and record the data.

[0023] A2. Static pressure resistance test: Close the glue gun, open the glue inlet valve, and continuously supply glue to the metering machine with the glue pump. When the pressure is 170-200 bar, close the glue inlet valve. Repeat the test for more than 60 minutes to check whether there is any leakage in the metering machine and the glue gun.

[0024] A3. Temperature test,

[0025] Step 1: Set the heating temperature of the first heating element, the second heating element, and the third heating element and heat them. Measure the real-time temperature using the corresponding first temperature sensor, second temperature sensor, and third temperature sensor. Determine the actual glue dispensing temperature of the glue gun based on the real-time temperature of the second temperature sensor. Adjust the set heating temperature of all heating elements according to the actual glue dispensing temperature, taking data more than 50 times.

[0026] Step 2: Set the dispensing temperature into the PLC controller via the input panel, then measure the actual dispensing temperature of the glue gun. Repeat the test more than 50 times to ensure that the percentage deviation between the dispensing temperature and the actual dispensing temperature of the glue gun is within ±2.0%. Select the optimal heating temperature for the current glue.

[0027] A4. Adhesive application precision test

[0028] Step 1: Set the dispensing volume into the PLC controller via the input panel, count the actual dispensing volume multiple times, and adjust the set dispensing volume based on the actual dispensing temperature of the glue gun to make the set dispensing volume as close as possible to the actual dispensing volume. Take more than 100 data points.

[0029] Step 2: In the PLC controller, the set dispensing speed is generated by the set dispensing amount corrected in the previous step. Apply glue, measure the actual dispensing speed of the nozzle, and take data more than 100 times to determine the glue application accuracy.

[0030] Preferably, in each data test, the set heating temperatures of the first heating element, the second heating element, and the third heating element are t1, t2, and t3, respectively, the set dispensing temperature is t0, and the real-time temperatures of the first temperature sensor, the second temperature sensor, and the third temperature sensor are... The actual dispensing temperature is t. s Statistically analyze all t0 values, select the t0 with the smallest difference x from the actual dispensing temperature, and calculate the corresponding t1, t2, and t3. The coordinate curves showing the relationship between the temperature decay coefficient and the actual dispensing temperature of the glue inlet valve, the metering machine, and the glue gun at the corresponding set temperature are established and stored in the PLC controller. After the required dispensing temperature is input on the input panel, the controller automatically obtains the set heating temperature and the set dispensing temperature of the first heating element, the second heating element, and the third heating element, and issues the corresponding control signal.

[0031] The present invention includes at least the following beneficial effects: The intelligent metering device in the glue supply system of the present invention pumps the glue material into the metering machine through a glue pump, which then enters the metering machine through the glue inlet valve. The metering machine dispenses the glue in a fixed quantity and finally dispenses it through a glue gun for glue application. The metering machine utilizes a cooperative structure of a servo motor, a lead screw, a lead screw nut, and a push rod. Driven by the rotation of the servo motor, the lead screw rotates, and the lead screw nut converts the rotational motion into linear motion to push the push rod to push the material. The movement speed of the lead screw is controlled by controlling the rotational speed of the servo motor, so as to achieve the purpose of extruding the glue material at a set speed. During the process of the glue material passing through the glue inlet valve, the metering machine, and the glue gun, the temperature is controlled by the corresponding first heating element, second heating element, and third heating element to ensure that the glue temperature at the glue gun is consistent with the required preset glue temperature, thereby ensuring the glue quantity, glue speed, and glue accuracy under specific temperature control.

[0032] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall external structure of the intelligent metering device in the glue supply system of the present invention;

[0034] Figure 2This is a cross-sectional view of the intelligent metering device in the glue supply system of the present invention in the direction of the glue gun.

[0035] Figure 3 This is a cross-sectional view of the intelligent metering device in the glue supply system of the present invention in the direction of the glue inlet valve.

[0036] Figure 4 This is a schematic diagram of the intelligent metering device in the glue supply system of the present invention when connected to the control system and glue pump.

[0037] Instruction manual drawing reference numerals: 1. Metering machine, 2. Moving chamber, 3. Filler bin, 4. Lead screw, 5. Bearing, 6. Reducer, 7. Servo motor, 8. Lead screw nut, 9. Push rod, 10. Glue inlet channel, 11. Glue outlet channel, 12. Pressure sensor, 13. First heating element, 14. First temperature sensor, 15. Glue gun, 16. Glue inlet, 17. Second heating element, 18. Second temperature sensor, 19. Glue inlet valve, 20. Discharge port, 21. Inlet, 22. Third heating element, 23. Third temperature sensor, 24. First sealing ring, 25. Lead screw lubricating grease pipe, 26. First sealing ring. 27. Lubricating oil pipe for sealing ring; 28. Guide rod; 29. ​​Sliding sleeve; 30. Gun body; 31. Nozzle; 32. Glue outlet channel; 33. Glue outlet; 34. First heating tank; 35. First valve needle; 36. First piston; 37. First air control valve; 38. Second sealing ring; 39. Lubricating oil pipe for second sealing ring; 40. Valve body; 41. Discharge end; 42. Discharge channel; 43. Second heating tank; 44. Second valve needle; 45. Second piston; 46. Second spring; 47. Second air control valve; 48. Third sealing ring; 49. Lubricating oil pipe for third sealing ring; 50. Control system; 51. Glue pump. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0039] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] like Figure 1-4As shown, the present invention provides an intelligent metering device in a glue supply system, comprising:

[0041] A metering machine 1 has an axially continuous inner side. A movable cavity 2 and a filling chamber 3 are sequentially arranged axially. The cross-sectional dimension of the movable cavity 2 is larger than that of the filling chamber 3. A lead screw 4 is axially installed inside the movable cavity 2. The outer side of the lead screw 4, away from the filling chamber 3, is mounted inside the movable cavity 2 via a connecting bearing 5. After the lead screw 4 extends out of the movable cavity 2, it is sequentially connected to a reducer 6 and a servo motor 7 in a coaxial direction. The other outer side of the lead screw 4 is threadedly connected to a lead screw nut 8. The lead screw nut 8, on the side facing away from the bearing 5, is threadedly connected to a metering machine. A push rod 9 is axially arranged in the machine 1. The push rod 9 extends toward the inner wall of the filling chamber 3 and is slidably connected to the inner wall of the filling chamber 3. The screw nut 8 moves along the axial direction of the filling chamber 3 under the limitation of the inner wall of the filling chamber 3. A glue inlet channel 10 is radially opened outward at one end of the filling chamber 3 near the movable cavity 2. A glue outlet channel 11 is radially opened outward at one end of the filling chamber 3 away from the movable cavity 2. A pressure sensor 12 is provided on the glue outlet channel 11. A first heating element 13 and a first temperature sensor 14 are arranged on the filling chamber 3 and the glue outlet channel 11.

[0042] The glue gun 15 has a glue inlet 16, which is connected to the glue outlet channel 11. The glue gun 15 is used to dispense glue. The glue gun 15 is also equipped with a second heating element 17 and a second temperature sensor 18.

[0043] The glue inlet valve 19 has an outlet 20 at one end and an inlet 21 at the other end. The outlet 20 is connected to the glue inlet channel 10, and the inlet 21 is used to connect to the glue pump 51. The glue inlet valve 19 is used to control whether to deliver glue to the glue inlet channel 10. The glue inlet valve 19 is also equipped with a third heating element 22 and a third temperature sensor 23.

[0044] In this embodiment, the servo motor 7 provides power, and the torque of the servo motor 7 is increased by the reducer 6, which then transmits the rotational torque to the lead screw 4. The axial thrust on the lead screw 4 is completely absorbed by the bearing 5. The rotation of the lead screw 4 drives the lead screw nut 8. The rotation of the lead screw nut 8 is restricted within the stuffing bin 3, and it only moves linearly along the lead screw 4. The lead screw nut 8 converts the rotational torque of the lead screw 4 into a linear thrust that propels the push rod 9 forward into the stuffing bin 3, i.e. Figure 2 The material is pushed in the direction shown to the right; the amount of material pushed is inferred from the distance the push rod 9 moves linearly based on the number of rotations of the servo motor 7, thereby achieving quantitative discharge. The first heating element 13 is arranged in the outer shell of the filling chamber 3. When the first heating element 13 is heating, the temperature can be monitored in real time by the first temperature sensor 14 to ensure that the temperature is constant.

[0045] First, open the glue inlet valve and close the glue gun 15. The glue is powered by the glue pump 51, which draws it from the glue tank into the connected glue hose. The glue then enters the glue inlet 21 of the glue inlet valve 19. The third heating element 22 heats and controls the temperature, while the third temperature sensor 23 monitors the temperature in real time to ensure a constant temperature. After passing through the internal channel of the glue inlet valve 19, the glue reaches the glue inlet channel 10 of the metering machine 1 from the outlet 20, and then enters the filling chamber 3 until it is full. The first heating element 13 controls the temperature, and the first temperature sensor 14 ensures a constant temperature. Then, the glue is closed... When the glue inlet valve is closed, the glue is pushed by the push rod 9, pre-pressing the glue in the filler chamber 3 to a set value within the range of 1 bar to 300 bar. The pressure sensor 12 detects the pressure in the filler chamber 3. The glue gun 15 is opened, and the glue enters the glue gun 15 under the action of the push rod 9. At the same time, the second heating element 17 heats and controls the temperature, and the second temperature sensor 18 ensures that the temperature is constant. The glue gun 15 quickly discharges the glue, while the servo motor 7 continues to rotate, pushing the push rod 9 to push the glue until the glue in the filler chamber 3 is exhausted. Then the previous operation is repeated for the next glue application operation.

[0046] The intelligent metering device in the glue supply system of this invention pumps the glue material into the metering machine 1 through the glue pump 51, which then dispenses the glue material through the glue inlet valve. The metering machine 1 dispenses the glue material and finally dispenses it through the glue gun 15 for glue application. The metering machine 1 utilizes a cooperative structure of servo motor 7, lead screw 4, lead screw nut 8, and push rod 9. Driven by the rotation of servo motor 7, the lead screw 4 rotates. The lead screw nut 8 then converts the rotational motion into linear motion, pushing the push rod 9 to push the material. The speed of the lead screw 4 is controlled by controlling the rotational speed of servo motor 7, so as to achieve the purpose of extruding the glue material at a set speed. During the process of the glue material passing through the glue inlet valve, metering machine 1, and glue gun 15, the corresponding first heating element 13, second heating element 17, and third heating element 22 coordinate to control the temperature, ensuring that the glue temperature at the glue gun 15 is consistent with the required preset glue temperature, thereby ensuring the glue quantity, glue speed, and glue accuracy under specific temperature control.

[0047] In another technical solution, such as Figure 1-3 As shown, a sealing element is embedded in the inner wall of the packing chamber 3 near the movable cavity 2. The sealing element includes a plurality of first sealing rings 24 arranged along the axial direction of the packing chamber 3. The inner side of the first sealing ring 24 is used to slide with the outer side wall of the push rod 9. A screw lubricating grease pipe 25 and a first sealing ring lubricating oil pipe 26 are arranged on the outer side of the movable cavity 2. The screw lubricating grease pipe 25 is connected to the outer side wall of the screw 4, and the first sealing ring lubricating oil pipe 26 is connected to the location of the first sealing ring 24.

[0048] By setting up seals, namely multiple first sealing rings 24, the rubber material in the packing chamber 3 is guaranteed to be leak-free under high pressure. By setting up screw lubricating grease pipes 25 and first sealing ring lubricating oil pipes 26, the outer surface of screw 4 and the contact surface between the first sealing ring 24 and the push rod 9 are respectively lubricated, thereby extending the service life of screw 4 and first sealing ring 24.

[0049] In another technical solution, such as Figure 2 As shown, a guide rod 27 is fixed along the axial direction of the movable cavity 2 near the inner side wall. A sliding sleeve 28 is connected to the outer side of the lead screw nut 8. The end of the sliding sleeve 28 away from the lead screw nut 8 is sleeved on the guide rod 27 and slidably connected to the guide rod 27.

[0050] By setting the guide rod 27, under the action of the guide rod 27, the lead screw nut 8 connected to the sliding sleeve 28 is restricted by the guide rod 27 and cannot rotate axially. It can only move back and forth along the length of the guide rod 27, while simultaneously moving the push rod 9 along the same path. Figure 2 Move in the left and right directions as shown.

[0051] In another technical solution, such as Figure 1-2 As shown, the glue gun 15 includes a gun body 29. The inner side of the gun body 29 has a cavity, and a nozzle 30 is provided at one end of the cavity. A glue outlet channel 31 is formed on the inner side of the nozzle 30, and a glue outlet 32 ​​is provided at the end of the glue outlet channel 31. A first heating groove 33 is provided in the middle of the gun body 29. A glue inlet 16 is formed on the side wall of the first heating groove 33. The glue inlet 16 extends along the axial direction of the gun body 29 and communicates with the glue outlet channel 31. A first valve needle 34 is provided inside the gun body 29 facing the glue outlet channel 31. One end of the first valve needle 34 passes through the first heating groove 33 and extends into the glue outlet channel 31, completely blocking the glue outlet 32. The other end of the first valve needle 34 is coaxially fixed with a first... The piston 35 is sealed and slidably connected to the inner wall of the gun body 29. A first spring 36 is connected between the first piston 35 and the corresponding top wall of the gun body 29. The first spring 36 is used to push the first piston 35 towards the glue outlet 32, so that the first valve needle 34 blocks the glue outlet 32. A first air control valve 37 is also provided at the end of the gun body 29 where the first piston 35 is provided. The air outlet of the first air control valve 37 is connected to the space where the first spring 36 is located, and is used to drive the first piston 35 to move back and forth towards the glue outlet 32 ​​by adjusting the air pressure. The second heating element 17 is arranged on the first heating groove 33 and the nozzle 30 respectively. The second temperature sensor 18 is provided on the first heating groove 33.

[0052] The second heating element 17 and the second temperature sensor 18 are arranged on the first heating groove 33. The first heating groove 33 is directly mounted on the middle of the gun body 29, and the path of the glue entering the gun body 29 is set on the first heating groove 33, that is, the glue exits from the glue inlet 16, the glue outlet channel 31, and the glue outlet 32. The glue exiting process is heated and temperature controlled by the second heating element 17, and the second temperature sensor 18 monitors the actual temperature of the glue during exiting. During the glue exiting process through the glue gun 15, the first air control valve 37 controls the gas in the space where the first spring 36 is located to decrease, the pressure drops, and the first piston 35 drives the first valve needle 34 to move towards the top wall of the gun body 29, thereby... The first valve needle 34 moves away from the glue outlet 32, allowing the glue entering the gun body 29 to enter the glue outlet channel 31 from the glue inlet 16 and then be squeezed out from the glue outlet 32 ​​for glue application. After glue application, the first air control valve 37 pushes the first piston 35 and the first valve needle 34 toward the glue outlet 32 ​​to block the glue outlet 32. After power and air are cut off, the elasticity of the first spring 36 squeezes the first valve needle 34 to ensure that the glue gun 15 is always closed to prevent glue leakage. The first heating tank 33, the second heating element 17, and the second temperature sensor 18 are provided to facilitate centralized control and maintain the temperature of the glue in the glue gun 15, and to facilitate intelligent control of environmental parameters during the glue application process.

[0053] In another technical solution, such as Figure 1-2 As shown, a second sealing ring 38 is provided between the first valve needle 34 and the first heating groove 33. A second sealing ring lubrication oil pipe 39 is provided on the outer side of the gun body 29, and the second sealing ring lubrication oil pipe 39 connects to the location of the second sealing ring 38. The second sealing ring lubrication oil pipe 39 allows some lubricating oil to flow to the second sealing ring 38, providing lubrication and improving service life.

[0054] In another technical solution, such as Figure 1 , Figure 3As shown, the glue inlet valve 19 includes a valve body 40. The inner side of the valve body 40 has a cavity, and a discharge end 41 is connected to one end of the cavity. A discharge channel 42 is opened in the discharge end 41. The outer end of the discharge channel 42 is the discharge port 20, and the inner end is the inlet. A second heating groove 43 is provided on the side of the valve body 40 near the discharge end 41. The inlet 21 is opened on the side wall of the second heating groove 43. The inlet 21 extends along the axial direction of the valve body 40 and communicates with the inlet. A second valve needle 44 is provided inside the valve body 40 facing the discharge channel 42. One end of the second valve needle 44 passes through the second heating groove 43 and extends into the inlet, which can just completely block the inlet. The other end of the second valve needle 44... A second piston 45 is coaxially fixed, and the second piston 45 is slidably connected to the inner wall of the valve body 40. A second spring 46 is connected between the second piston 45 and the corresponding top wall of the valve body 40. The second spring 46 is used to push the second piston 45 towards the feed port, so that the second valve needle 44 blocks the feed port. A second pneumatic valve 47 is provided at the end of the valve body 40 where the second piston 45 is provided. The air outlet of the second pneumatic valve 47 is connected to the space where the second spring 46 is located, and is used to drive the second piston 45 to move back and forth towards the feed port by adjusting the air pressure. The third heating element 22 is arranged on the second heating tank 43 and the discharge end 41 respectively. The third temperature sensor 23 is arranged on the second heating tank 43.

[0055] The third heating element 22 and the third temperature sensor 23 are arranged on the second heating tank 43. The second heating tank 43 is directly mounted in the middle of the gun body 29, and the path of the glue entering the glue inlet valve 19 is set on the second heating tank 43, that is, the glue enters from the feed port 21, the inlet port, the outlet channel 42, and the outlet port 20. The glue inlet process is heated and temperature controlled by the third heating element 22, and the third temperature sensor 23 monitors the actual temperature of the glue when it is discharged. During the glue inlet process through the glue inlet valve 19, the second pneumatic control valve 47 controls the gas in the space where the second spring 46 is located to decrease, the pressure drops, and the second piston 45 drives the second valve needle 44 to move toward the top wall of the glue inlet valve 19. This causes the second valve needle 44 to leave the inlet, allowing the adhesive entering the glue inlet valve 19 to enter the outlet flow channel 42 from the inlet, and then be extruded from the outlet 20, and connected to the filling chamber 3 of the metering machine 1. After the glue is fed, the second piston 45 and the second valve needle 44 are pushed towards the inlet by the second air control valve 47, blocking the inlet. After the power and air are cut off, the elasticity of the second spring 46 squeezes the second valve needle 44 to ensure that the glue inlet valve 19 is always closed to prevent glue leakage. The first heating tank, the third heating element 22, and the third temperature sensor 23 are provided to facilitate centralized control and maintain the temperature of the adhesive in the glue inlet valve 19, which facilitates intelligent control of environmental parameters during the glue feeding process. The internal structure of the first heating tank 33 and the second heating tank 43 can be set to be the same, with only the inlet 21 structure additionally set on the outside of the second heating tank 43, which is conducive to the collaborative optimization of the heating control process of the third heating element 22 and the second heating element 17, reducing the difficulty of subsequent optimization tests.

[0056] In another technical solution, such as Figure 3 As shown, a third sealing ring 48 is provided between the second valve needle 44 and the second heating groove 43. A third sealing ring lubrication oil pipe 49 is provided on the outer side of the valve body 40, and the third sealing ring lubrication oil pipe 49 connects to the location of the third sealing ring 48. The third sealing ring lubrication oil pipe 49 allows some lubricating oil to flow to the third sealing ring 48, providing lubrication and improving service life.

[0057] This invention also provides a method for using an intelligent metering device in a glue supply system, combined with Figure 1-4 As shown, it includes the following steps:

[0058] S1. Test and optimize the dispensing volume, dispensing accuracy, temperature, pressure, and airtightness of the intelligent quantitative device in the glue supply system.

[0059] S2. The glue inlet valve 19 is opened, and the glue gun 15 is closed.

[0060] S3. The glue pump 51 feeds glue through the feed port 21, which enters the glue feeding channel 10 to fill the filler chamber 3, and then the glue feeding valve 19 is closed.

[0061] S4. The servo motor 7 drives the lead screw 4 to rotate, which in turn drives the lead screw nut 8 and the push rod 9 to push the adhesive material into the filling chamber 3, pre-pressing the adhesive material in the filling chamber 3 to a set value.

[0062] S5. The glue gun 15 is opened and begins to dispense glue rapidly. At the same time, the servo motor 7 rotates continuously, pushing the push rod 9 forward to push the material. After the glue in the filler chamber 3 is used up, the next cycle begins.

[0063] By repeatedly testing and optimizing the set values ​​and the parameters of the glue output from the glue gun 15, such as glue output volume, glue output accuracy, temperature, pressure on the equipment, and airtightness, the output glue state is made close to the required preset state. Then, the glue is fed into the glue gun 15 in a quantitative manner by controlling the glue inlet valve. Finally, the glue gun 15 dispenses the glue for the glue application operation.

[0064] In another technical solution, such as Figure 1-4 As shown, a control system 50 is also provided between the intelligent metering device in the glue supply system and the glue pump 51. The control system 50 includes a PLC controller and an input panel that are electrically connected to each other. The first heating element 13, the second heating element 17, the third heating element 22, the first temperature sensor 14, the second temperature sensor 18, the third temperature sensor 23, the servo motor 7, the first pneumatic control valve 37, and the second pneumatic control valve 47 are respectively electrically connected to the PLC controller. Step S1 specifically includes the following steps:

[0065] A1. Dynamic testing: First, at room temperature, fill the equipment with auxiliary materials grease, sealant, and structural adhesive in sequence. Set the pressure of the glue pump 51 to 160-200 bar and the glue application speed to 10-15 cm³ / s for testing. Check the sealing performance of the metering machine 1, glue gun 15, and glue inlet valve 19 to check for leaks. Then, activate all the first heating elements 13, the second heating elements 17, and the third heating elements 22, fill with structural adhesive for auxiliary materials, and test under the same set conditions. Afterward, disassemble the machine for inspection and record the data.

[0066] Specifically, Step 1: Initial equipment testing. At room temperature, use grease as the filling material, set the pressure value to 160-200 bar for more than 500 tests, and the speed to 10-15 cm³ / s. Check the sealing of the metering machine 1, glue gun 15, and shut-off valve.

[0067] Step 2: At room temperature, fill the auxiliary material with sealant (the adhesive used in car body manufacturing), set the pressure value to 160-200 bar for adhesive application test, apply adhesive at a speed of 10-15 cm³ / s, test 20,000 times, partially disassemble the machine for inspection, and check for leaks.

[0068] Step 3: At room temperature, use structural adhesive for filling auxiliary materials, set the pressure value to 160-200 bar for adhesive application test, the application speed to 10-15 cm³ / s, test 40,000 times, disassemble the machine to check and record the data;

[0069] Step 4: Activate the heating system of metering machine 1 and glue gun 15, fill with structural adhesive for auxiliary materials, set the pressure value to 160-200 bar for glue application test, glue application speed 10-15 cm³ / s, test 40,000 times, disassemble the machine for inspection and record the data.

[0070] A2. Static pressure resistance test: Close the glue gun 15, open the glue inlet valve 19, and continuously supply glue to the metering machine 1 with the glue pump 51. When the pressure is between 170-200 bar, close the glue inlet valve 19. Repeat the test for more than 60 minutes to check whether the metering machine 1 and the glue gun 15 have any leaks. The total test time should not be less than 600 minutes.

[0071] A3. Temperature test,

[0072] Step 1: Set the heating temperature of the first heating element 13, the second heating element 17, and the third heating element 22 and heat them. Measure the real-time temperature using the corresponding first temperature sensor 14, second temperature sensor 18, and third temperature sensor 23. Determine the actual glue dispensing temperature of the glue gun 15 based on the real-time temperature of the second temperature sensor 18. Adjust the set heating temperature of all heating elements according to the actual glue dispensing temperature, taking data more than 50 times.

[0073] Step 2: Set the dispensing temperature into the PLC controller via the input panel, then measure the actual dispensing temperature of the glue gun 15. Repeat the test more than 50 times to ensure that the percentage deviation between the dispensing temperature and the actual dispensing temperature of the glue gun 15 is within ±2.0%. Select the optimal heating temperature for the current glue.

[0074] A4. Adhesive application precision test

[0075] Step 1: Set the dispensing volume into the PLC controller via the input panel, count the actual dispensing volume multiple times, and adjust the set dispensing volume based on the actual dispensing temperature of the glue gun 15 to make the set dispensing volume as close as possible to the actual dispensing volume. Take more than 100 data points.

[0076] Step 2: In the PLC controller, the set dispensing speed is formed by using the set dispensing amount corrected in the previous step. Apply glue, measure the actual dispensing speed of the nozzle 30, and take data greater than 100 times to determine the glue application accuracy.

[0077] By setting the required parameters through the input panel and detecting the measured parameter values, the heating system consisting of the first heating element 13, the second heating element 17, the third heating element 22, the first temperature sensor 14, the second temperature sensor 18, and the third temperature sensor 23 is used to optimize the dispensing process and achieve intelligent control of the dispensing process parameters.

[0078] In another technical solution, in each data test, the set heating temperatures of the first heating element 13, the second heating element 17, and the third heating element 22 are t1, t2, and t3, respectively, and the set dispensing temperature is t0. The real-time temperatures of the first temperature sensor 14, the second temperature sensor 18, and the third temperature sensor 23 are... The actual dispensing temperature is t. s Count all t0, selections, and t. s Compare the t0 with the smallest difference x, and the corresponding t1, t2, and t3, and calculate the temperature decay coefficient. A coordinate curve graph showing the relationship between the temperature decay coefficient and the actual dispensing temperature of the glue inlet valve 19, the metering machine 1, and the glue gun 15 at the corresponding set temperature is established and stored in the PLC controller. After the desired dispensing temperature is input on the input panel, the PLC controller automatically obtains the set heating temperature and set dispensing temperature values ​​of the first heating element 13, the second heating element 17, and the third heating element 22, and issues corresponding control signals. By using the temperature decay coefficient, the temperature change of the metering machine 1, the glue gun 15, and the glue inlet valve 19 can be quickly obtained at a certain temperature, thereby intelligently and accurately guiding the temperature setting of each heating element.

[0079] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An intelligent dosing device for a glue system, characterized in that, The application relates to a quantitative device and a glue supply system. The quantitative device comprises an inside through which an active cavity and a filler bin are sequentially arranged in an axial direction, the cross-sectional size of the active cavity is larger than that of the filler bin, a lead screw is arranged in the active cavity in the axial direction, the outer side of the end of the lead screw away from the filler bin is installed in the active cavity through a connecting bearing, the lead screw is sequentially connected with a speed reducer and a servo motor in a coaxial direction after the lead screw extends out of the active cavity, the outer side of the other end of the lead screw is connected with a lead screw nut through threads, the lead screw nut is connected with a push rod arranged in the axial direction of the quantitative device on the side away from the bearing through threads, the push rod extends towards the inside of the filler bin and is sealingly and slidably connected with the inner wall of the filler bin, the lead screw nut moves along the axial direction of the filler bin under the limitation of the inner wall of the filler bin, a glue inlet channel is formed on the end of the filler bin close to the active cavity in a radial direction, a glue outlet channel is formed on the end of the filler bin away from the active cavity in a radial direction, a pressure sensor is arranged on the glue outlet channel, a first heating element and a first temperature sensor are arranged on the filler bin and the glue outlet channel; The glue gun is provided with a glue inlet, the glue inlet is communicated with the glue outlet channel, the glue gun is used for glue outlet, and a second heating element and a second temperature sensor are further arranged in the glue gun; The glue inlet valve is provided with a discharge port and a feeding port, the discharge port is communicated with the glue inlet channel, the feeding port is used for being connected with a glue pump, the glue inlet valve is used for controlling whether glue material is delivered to the glue inlet channel, a third heating element and a third temperature sensor are further arranged on the glue inlet valve; A control system is further arranged between the intelligent quantitative device and the glue pump, the control system comprises a PLC controller and an input panel which are electrically connected with each other, the first heating element, the second heating element, the third heating element, the first temperature sensor, the second temperature sensor, the third temperature sensor and the servo motor are electrically connected with the PLC controller respectively; The glue outlet amount, glue outlet precision, temperature, pressure and air tightness of the intelligent quantitative device in the glue supply system are tested and optimized through the following steps: A1, dynamic test, first, auxiliary materials such as butter, sealant and structural glue are sequentially filled in the device at normal temperature, the pressure value of the glue pump is set as 160-200 bar, and the glue coating speed is set as 10-15 cm3 / s for testing, the sealing performance of the quantitative device, the glue gun and the glue inlet valve is checked, whether leakage exists is checked, then all the first heating element, the second heating element and the third heating element are started, auxiliary materials are filled with structural glue, the same setting condition is used for testing, then the device is disassembled, data is recorded and checked; A2, static pressure value test, the glue gun is closed, the glue inlet valve is opened, the glue pump is used for continuously supplying glue to the quantitative device, the glue inlet valve is closed when the pressure is 170-200 bar, the test is continuously carried out for more than 60 minutes, whether the quantitative device and the glue gun have leakage is checked; A3, temperature test, Step 1: set the heating temperature of the first heating element, the second heating element and the third heating element, measure the real-time temperature through the first temperature sensor, the second temperature sensor and the third temperature sensor, determine the actual glue output temperature of the glue gun according to the real-time temperature of the second temperature sensor, adjust the set heating temperature of all heating elements according to the actual glue output temperature, and take more than 50 times of data; Step 2: set the glue output temperature in the PLC controller through the input panel, then measure the actual glue output temperature of the glue gun, and repeat the test more than 50 times to ensure that the deviation percentage of the glue output temperature and the actual glue output temperature of the glue gun is within ±2.0%, and select the best set heating temperature corresponding to the current glue; A4, glue application precision test, Step 1: set the glue output amount in the PLC controller through the input panel, and statistically count the actual glue output amount for multiple times, and adjust the set glue output amount in combination with the actual glue output temperature of the glue gun to make the set glue output amount as close to the actual glue output amount as possible, and take more than 100 times of data; Step 2: form a set glue output speed in the PLC controller by using the set glue output amount corrected in the previous step, apply glue, measure the actual glue output speed of the glue gun, take more than 100 times of data, and determine the glue application precision.

2. The intelligent quantitative device in the glue supply system according to claim 1, wherein, The sealing element is embedded and installed on the inner side wall of one end of the movable cavity close to the filler bin, and the sealing element comprises a plurality of first sealing rings arranged along the axial direction of the filler bin, the inner side of the first sealing ring is used for sliding connection with the outer side wall of the push rod, and the outer side of the movable cavity is provided with a lead screw lubricating grease pipe and a first sealing ring lubricating oil pipe, the lead screw lubricating grease pipe is communicated to the outer side wall of the lead screw, and the first sealing ring lubricating oil pipe is communicated to the position where the first sealing ring is located.

3. The intelligent dosing device for glue system of claim 1, wherein, A guide rod is fixed at a position close to the inner side wall in the movable cavity along the axial direction of the movable cavity, and a sliding sleeve is connected to the outer side of the lead screw nut, one end of the sliding sleeve away from the lead screw nut is sleeved on the guide rod and is in sliding connection with the guide rod.

4. The intelligent quantitative device in the glue supply system according to claim 2, wherein, The glue gun comprises a gun body, the inner side of the gun body has a cavity, one end of the cavity is provided with a nozzle, the inner side of the nozzle is provided with a glue outlet channel, the end of the glue outlet channel is provided with a glue outlet, the middle of the gun body is provided with a first heating groove, the side wall of the first heating groove is provided with the glue inlet, the glue inlet is communicated with the glue outlet channel after extending along the inclination direction of the axial direction of the gun body, a first valve needle is arranged in the gun body towards the glue outlet channel, one end of the first valve needle penetrates through the first heating groove and extends into the glue outlet channel and can completely block the glue outlet, the other end of the first valve needle is coaxially fixed with a first piston, the first piston is in sealing sliding connection with the inner side wall of the gun body, a first spring is connected between the first piston and the corresponding end top wall of the gun body, the first spring is used for pushing the first piston towards the glue outlet direction to block the glue outlet, the gun body is further provided with a first pneumatic control valve at the end provided with the first piston, the air outlet end of the first pneumatic control valve is communicated to the space where the first spring is located, and is used for driving the first piston to reciprocate towards the glue outlet by adjusting the air pressure, the second heating element is arranged on the first heating groove and the nozzle respectively, and the second temperature sensor is arranged on the first heating groove.

5. The intelligent dosing device for glue system of claim 4, wherein, The second sealing ring is arranged between the first valve needle and the first heating groove, and the outer side of the gun body is provided with a second sealing ring lubricating oil pipe which is communicated to the position of the second sealing ring.

6. The intelligent dosing device for glue system of claim 5, wherein, The glue feeding valve comprises a valve body, the inner side of the valve body is provided with a cavity, one end of the cavity is connected with a discharging end, the discharging end is provided with a discharging flow channel, the outer end of the discharging flow channel is the discharging port, and the inner end of the discharging flow channel is the feeding port, the valve body is provided with a second heating groove on the side close to the discharging end, the feeding port is arranged on the side wall of the second heating groove and is communicated with the feeding port after extending along the direction inclined to the axial direction of the valve body, the second valve needle is arranged in the valve body and extends into the feeding port through the second heating groove, the other end of the second valve needle is coaxially fixed with a second piston, the second piston is in sealing sliding connection with the inner side wall of the valve body, a second spring is arranged between the second piston and the corresponding end top wall of the valve body, the second spring is used for pushing the second piston towards the feeding port, so that the second valve needle blocks the feeding port, the second pneumatic control valve is arranged on the end of the valve body provided with the second piston, the gas outlet end of the second pneumatic control valve is communicated to the space where the second spring is arranged, the second pneumatic control valve is used for driving the second piston to reciprocate towards the feeding port by adjusting the air pressure, the third heating element is arranged on the second heating groove and the discharging end respectively, and the third temperature sensor is arranged on the second heating groove.

7. The intelligent dosing device for glue system of claim 6, wherein, The third sealing ring is arranged between the second valve needle and the second heating groove, and the outer side of the valve body is provided with a third sealing ring lubricating oil pipe which is communicated to the position of the third sealing ring.

8. The method of claim 1, wherein the method further comprises: determining a volume of the adhesive to be dispensed; and dispensing the determined volume of the adhesive. The method comprises the following steps: S1, the glue feeding amount, glue feeding precision, temperature, pressure and air tightness of the intelligent quantitative equipment in the glue supply system are tested and optimized; S2, the glue feeding valve is opened, and the glue gun is closed; S3, the glue pump feeds glue through the feeding port, fills the filler bin, and then closes the glue feeding valve; S4, the servo motor drives the screw rod to rotate, drives the screw nut and the push rod to push the glue in the filler bin, and pre-presses the glue in the filler bin to a set value; S5, the glue gun is opened, and the glue feeding starts quickly, the servo motor continuously rotates, the push rod pushes the glue forward, and when the glue in the filler bin is used up, the next cycle is started.

9. The method of claim 1, wherein the method further comprises: determining a volume of the adhesive to be dispensed; and dispensing the determined volume of the adhesive. In each data test, the set heating temperature of the first heating element, the second heating element and the third heating element is t1, t2 and t3 respectively, the set glue output temperature is t0, the real-time temperature of the first temperature sensor, the second temperature sensor and the third temperature sensor is t s-1 , t s , t s-2 , the actual glue output temperature is t s , all t0 is counted, the t0 with the smallest difference x with the actual glue output temperature is selected, and the t1, t2 and t3 corresponding to the t0 are selected, the temperature attenuation coefficient is calculated, the change relationship coordinate graph of the temperature attenuation coefficient and the actual glue output temperature corresponding to the set temperature of the glue valve, the quantitative machine and the glue gun is established respectively, and is stored in the PLC controller, after the required glue output temperature is input in the input panel, the set value of the set heating temperature of the first heating element, the second heating element and the third heating element and the set glue output temperature is automatically acquired, and the corresponding control signal is sent.

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