Control parameter intelligent adjustment algorithm and system for hydraulic turntable of injection molding machine

Abstract

The invention relates to an intelligent control parameter adjusting algorithm and system for a hydraulic turntable of an injection molding machine, and relates to the field of injection molding machines, and the intelligent control parameter adjusting algorithm comprises the following steps: controlling the turntable to rotate clockwise at a preset initial fixed position at a preset initial clockwise rotation angle, and controlling a side positioning pin to be inserted and locked at a preset initial clockwise in-place window; obtaining the side positioning pinning time; the side positioning pin is controlled to exit, and the rotary table is subjected to rotary adjustment through a preset rotary adjustment method; correcting and adjusting the initial in-place window, and controlling the turntable to rotate clockwise again for multiple times; and the side positioning pin is controlled to be inserted and locked at the corrected initial smooth in-place window so as to control the side positioning pin advancing time to be the minimum value, the minimum value of the side positioning pin advancing time is recorded and defined as the minimum side positioning pin advancing time, and the final initial smooth in-place window is output and defined as the corrected smooth in-place window. The method has the effect of improving the parameter adjustment efficiency and the operation stability of the hydraulic turntable of the injection molding machine.

Description

Technical Field

[0001] The present invention relates to the field of injection molding machines, and in particular to an intelligent adjustment algorithm and system for control parameters of a hydraulic turntable of an injection molding machine. Background Art

[0002] The hydraulic turntable of an injection molding machine is an important component in the injection molding machine. The working principle of the hydraulic turntable is based on a hydraulic transmission system. The hydraulic transmission system uses hydraulic oil as the working medium and uses a power element to convert mechanical energy into the pressure energy of the hydraulic oil. After the pressure energy passes through the control element, it is then converted into mechanical energy through the actuator, thereby driving the turntable to rotate.

[0003] Due to different machining precisions of the turntables of different injection molding machines, the rotation strokes during the rotation of the turntable are different, that is, when the turntable rotates according to the system-set angle, the actual rotation angle is different from the set rotation angle. And when the turntable rotates in place, it needs to be locked by a side positioning pin. Premature insertion or late insertion of the side positioning pin during insertion will cause the turntable to return. Therefore, the relevant parameters of the turntable need to be adjusted to make the turntable run more smoothly. The parameter adjustment work of the turntable is usually carried out by experienced engineers. However, due to the complexity of the injection molding machine equipment, there are still certain errors when adjusting only by manpower, and the level differences of the engineers will cause the operation of the injection molding machine turntable to be unstable. Summary of the Invention

[0004] In order to improve the efficiency of parameter adjustment of the hydraulic turntable of the injection molding machine to improve the operation stability, the present invention provides an intelligent adjustment algorithm and system for control parameters of the hydraulic turntable of the injection molding machine.

[0005] In a first aspect, the present invention provides an intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine, adopting the following technical solution:

[0006] An intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine, comprising:

[0007] Controlling the turntable to rotate clockwise at a preset initial clockwise rotation angle from a preset starting fixed position, and controlling the side positioning pin to be inserted and locked at a preset initial in-place window, and obtaining the side positioning pin entry time;

[0008] Controlling the side positioning pin to withdraw, and performing a swing adjustment on the turntable by a preset swing adjustment method;

[0009] Performing a correction adjustment on the initial in-place window, and controlling the turntable to rotate clockwise again for multiple times;

[0010] Insert and lock the side positioning pin at the corrected initial forward in-place window to control the side positioning pin entry time to the minimum value. Record the minimum value of the side positioning pin entry time and define it as the minimum side positioning pin entry time. Output the final initial forward in-place window and define it as the corrected forward in-place window.

[0011] By adopting the above technical solution, the system adjusts the forward in-place window based on the obtained side positioning pin entry time and the change of the side positioning pin time, reducing the debugging difficulty of the hydraulic turntable. The parameters of the hydraulic turntable can be quickly adjusted within several rotation cycles of the turntable. The process of automatic adjustment of the system improves the efficiency of parameter adjustment of the hydraulic turntable of the injection molding machine, thereby improving the operation stability.

[0012] Optionally, the correction adjustment method for the initial forward in-place window includes:

[0013] Determine the corrected forward in-place window according to the initial forward in-place window and the preset in-place adjustment amount, and replace the initial forward in-place window;

[0014] Control the turntable to rotate clockwise again multiple times, insert and lock the side positioning pin at the corrected forward in-place window, and obtain the corrected side positioning pin entry time;

[0015] Determine the time deviation amount according to the side positioning pin entry time and the corrected side positioning pin entry time;

[0016] Match the in-place adjustment deviation amount according to the time deviation amount;

[0017] Adjust the in-place adjustment amount according to the in-place adjustment deviation amount until the in-place adjustment amount is 0.

[0018] Optionally, the turntable has two symmetric working stations, and the rotation adjustment method includes:

[0019] Determine the adjacent station angle according to the preset working station, and determine the reverse rotation angle according to the adjacent station angle;

[0020] Control the turntable to rotate counterclockwise at the reverse rotation angle, insert and lock the side positioning pin at the preset initial reverse in-place window, and obtain the reverse side positioning pin entry time;

[0021] Perform correction adjustment on the initial reverse in-place window, and control the turntable to perform rotation adjustment multiple times after the forward rotation adjustment is completed;

[0022] Insert and lock the side positioning pin at the corrected initial reverse in-place window to control the reverse side positioning pin entry time to the minimum value, output the final initial reverse in-place window and define it as the corrected reverse in-place window.

[0023] Optionally, after correcting the forward in-place window and the reverse in-place window, the tail section pressure also needs to be corrected. The tail section pressure is used to drive the turntable to rotate. The tail section pressure correction method includes:

[0024] Obtain the rotation direction of the turntable;

[0025] Determine the tail section pressure type according to the rotation direction, where the tail section pressure type includes the forward rotation tail section pressure and the reverse rotation tail section pressure;

[0026] Based on the forward rotation tail section pressure, obtain the current forward rotation pressure value during forward rotation;

[0027] Determine the forward in-place window adjustment amount according to the corrected forward in-place window and the preset corresponding current forward in-place window of the current forward rotation pressure value;

[0028] Match the forward rotation pressure adjustment amount according to the forward in-place window adjustment amount;

[0029] Adjust the current forward rotation pressure value according to the forward rotation pressure adjustment amount to obtain the corrected forward rotation tail section pressure, and output the corrected forward rotation tail section pressure.

[0030] Optionally, it further includes:

[0031] Based on the reverse rotation tail section pressure, obtain the current reverse rotation pressure value during reverse rotation;

[0032] Determine the reverse in-place window adjustment amount according to the corrected reverse in-place window and the preset corresponding current reverse in-place window of the current reverse rotation pressure value;

[0033] Match the reverse rotation pressure adjustment amount according to the reverse in-place window adjustment amount;

[0034] Adjust the current reverse rotation pressure value according to the reverse rotation pressure adjustment amount to obtain the corrected reverse rotation tail section pressure, and output the corrected reverse rotation tail section pressure.

[0035] Optionally, the tail section pressure correction method further includes:

[0036] Obtain the mold transfer in-place speed when the turntable is rotating forward and the side positioning pin is inserted and locked;

[0037] When the mold transfer in-place speed is greater than the preset calibrated steady speed, reduce the corrected forward rotation tail section pressure by a preset pressure reduction amount;

[0038] When the mold transfer in-place speed is less than the preset calibrated movement speed, increase the corrected forward rotation tail section pressure by a preset pressure increase amount.

[0039] Optionally, use the load pressure when the side positioning pin is inserted detected by the system pressure as an auxiliary detection means to adjust the control parameters of the turntable. The auxiliary detection means includes:

[0040] Obtain the initial system pressure feedback amount when the side positioning pin is inserted and locked;

[0041] According to the correction in-place window, the side positioning pins are cyclically inserted, and the pressure feedback of the correction system is obtained again;

[0042] Determine the pressure deviation according to the initial system pressure feedback and the pressure feedback of the correction system;

[0043] Match the in-place adjustment deviation according to the pressure deviation, and adjust the in-place adjustment amount according to the in-place adjustment deviation;

[0044] Adjust the correction in-place window according to the in-place adjustment amount;

[0045] Loop the above steps until the pressure deviation is 0 and the pressure feedback of the correction system reaches the minimum value, and output the correction in-place window.

[0046] Optionally, the system pressure is used for system anomaly warning. The system anomaly warning method includes:

[0047] After the initial in-place window correction, obtain the side positioning pin entry time again;

[0048] Determine the time increase or decrease direction according to the successively obtained side positioning pin entry times;

[0049] Determine the pressure increase or decrease direction according to the initial system pressure feedback and the pressure feedback of the correction system;

[0050] When and only when the time increase or decrease direction is inconsistent with the pressure increase or decrease direction, an alarm prompt is issued.

[0051] Optionally, after the hydraulic turntable is adjusted, the running state is continuously monitored during the subsequent running of the turntable. The monitoring method includes:

[0052] After the hydraulic turntable is adjusted, continuously obtain the side positioning pin entry monitoring time;

[0053] Determine the monitoring time deviation according to the side positioning pin entry monitoring time and the minimum side positioning pin entry time;

[0054] When and only when the monitoring time deviation is greater than the preset reference time deviation, an alarm prompt is issued, and the intelligent parameter adjustment of the hydraulic turntable is performed again.

[0055] In a second aspect, the present application provides an intelligent control parameter adjustment system for an injection molding machine hydraulic turntable, adopting the following technical solutions:

[0056] An intelligent control parameter adjustment system for an injection molding machine hydraulic turntable, comprising:

[0057] An acquisition module, configured to acquire the side positioning pin entry time, the corrected side positioning pin entry time, the reverse side positioning pin entry time, the reverse side positioning pin entry time, the current forward rotation pressure value during forward rotation, the current reverse rotation pressure value during rotation, the mold rotation in-place speed, the initial system pressure feedback amount, the corrected system pressure feedback amount, and the side positioning pin entry monitoring time;

[0058] A memory, configured to store the program of any one of the above control parameter intelligent adjustment algorithms for the hydraulic turntable of an injection molding machine;

[0059] A processor, the program in the memory can be loaded and executed by the processor and implement a control parameter intelligent adjustment algorithm for the hydraulic turntable of an injection molding machine.

[0060] In summary, the present application includes at least one of the following beneficial technical effects:

[0061] 1. The system adjusts the forward in-place window based on the acquisition of the side positioning pin entry time and the change of the side positioning pin time, reducing the debugging difficulty of the hydraulic turntable. The parameters of the hydraulic turntable can be quickly adjusted within several rotation cycles of the turntable. The automatic adjustment process of the system improves the efficiency of parameter adjustment of the hydraulic turntable of the injection molding machine, thereby improving the operation stability;

[0062] 2. The system adjusts the tail pressure, so that after the turntable corrects the forward and reverse in-place windows, the mold rotation in-place speed of the turntable is relatively stable and the impact is small;

[0063] 3. Using the load pressure detected by the system pressure when the side positioning pin is inserted as an auxiliary detection means to adjust the control parameters of the turntable can assist in correcting the forward and reverse in-place windows and improve the adjustment efficiency; and by detecting the system pressure, the side positioning pin entry time can be indirectly judged without additional installation of a pressure sensor, reducing costs. Description of the Drawings

[0064] Figure 1 is a flowchart of a control parameter intelligent adjustment algorithm for the hydraulic turntable of an injection molding machine according to an embodiment of the present invention;

[0065] Figure 2 is a flowchart of a method for correcting and adjusting the initial forward in-place window according to an embodiment of the present invention;

[0066] Figure 3 is a flowchart of a rotation adjustment method according to an embodiment of the present invention;

[0067] Figure 4 is a flowchart of a tail pressure correction method according to an embodiment of the present invention Figure 1 ;

[0068] Figure 5It is the method flow of the tail section pressure correction method of the embodiment of the present invention Figure 2 ;

[0069] Figure 6 It is the method flow of the tail section pressure correction method of the embodiment of the present invention Figure 3 。 Detailed implementation manners

[0070] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0071] The embodiment of the present application discloses an intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine. When the hydraulic turntable rotates, it is locked by a side positioning pin, and the side positioning pin is inserted when the turntable is about to reach the position. Since there is an error between the actual rotation angle and the preset rotation angle when the turntable rotates, the side positioning pin may be inserted too early or too late. When the above situation occurs and causes the turntable to reverse, due to the friction between the turntable and the side positioning pin, the load on the side positioning pin increases, which will affect the time for the side positioning pin to enter. By adjusting parameters such as the forward in-place window, forward rotation tail section pressure, reverse in-place window, and reverse rotation tail section pressure of the side positioning pin, the side positioning pin can accurately insert and lock the turntable when the turntable rotates to the position, and at this time, the time for the side positioning pin to enter is the shortest.

[0072] Referring to Figure 1 , an intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine includes the following steps:

[0073] Step S100: Control the turntable to rotate clockwise at a preset initial forward rotation angle from a preset starting fixed position, and control the side positioning pin to insert and lock at a preset initial forward in-place window, and obtain the time for the side positioning pin to enter.

[0074] The starting fixed position is the position where the side positioning pin is located when the hydraulic turntable starts to rotate. The starting fixed position is a position point set by the technician, which can be any point in the rotation stroke of the turntable or the station position on the turntable, and will not be elaborated here.

[0075] The initial forward rotation angle is the rotation angle set by the technician in the system for the turntable to rotate from the starting fixed position to the station position, and will not be elaborated here.

[0076] The initial in-place window is the position where the side positioning pin starts to be inserted as set by the technician, which will not be elaborated here. The initial in-place window does not coincide with the position where the turntable is locked after reaching the in-place state. The side positioning pin starts to be inserted at the initial in-place window, and at this time, the turntable is still rotating. When the turntable rotates to the station position, the side positioning pin completes the insertion and locks the turntable.

[0077] The side positioning pin insertion time is the time required for the side positioning pin to start insertion, complete insertion, and lock the turntable. The side positioning pin insertion time is recorded and retrieved by the system. Due to the friction between the turntable and the side positioning pin, the side positioning pin insertion times corresponding to different initial in-place windows are different.

[0078] When the system adjusts the hydraulic turntable, it first rotates the turntable clockwise from the starting fixed position to the station position, and starts timing at the initial in-place window to obtain the side positioning pin insertion time. At this time, there is friction between the turntable and the side positioning pin, and the side positioning pin insertion time is not the minimum value. It is necessary to adjust the initial in-place window to make the side positioning pin insertion time smaller.

[0079] Step S101: Control the side positioning pin to retract, and perform a rotary adjustment on the turntable with a preset rotary adjustment method.

[0080] After the side positioning pin insertion time corresponding to the initial in-place window is measured for the first time, it is necessary to perform a rotary adjustment on the turntable. The rotary adjustment refers to rotating the turntable counterclockwise by a certain angle for callback. According to the number of turntable stations, the in-place windows of other stations can also be adjusted during the rotary adjustment process. The rotary adjustment method will not be elaborated here and will be introduced in detail in the subsequent embodiments.

[0081] Step S102: Correct and adjust the initial in-place window, and control the turntable to rotate clockwise again multiple times.

[0082] After the rotary adjustment is completed, it is necessary to repeatedly perform the steps of forward rotation and insertion and rotary adjustment to repeatedly obtain the side positioning pin insertion time during clockwise rotation. Before each clockwise rotation, it is necessary to correct the initial in-place window of the previous mold to gradually make the side positioning pin insertion time tend to be the minimum. The clockwise rotation angle of the turntable for each subsequent mold depends on the angle of the rotary adjustment and is the same as the angle of the rotary adjustment. The method for correcting and adjusting the initial in-place window will not be elaborated here and will be introduced in detail in the subsequent embodiments.

[0083] Step S103: Control the side positioning pin to insert and lock at the corrected initial in-place window to control the side positioning pin insertion time to the minimum value. Record the minimum value of the side positioning pin insertion time and define it as the minimum side positioning pin insertion time, and output the final initial in-place window and define it as the corrected in-place window.

[0084] Each time it rotates clockwise again, the system controls the side positioning pin to start inserting in the corrected initial clockwise in-place window, obtains the side positioning pin entry time, and determines whether the side positioning pin entry time tends to the minimum value. When the side positioning pin entry time reaches the minimum value, at this time, the friction is the smallest when the side positioning pin is inserted into the turntable, that is, it can be accurately inserted into the turntable. The system records the minimum side positioning pin entry time at this time, and records the initial clockwise in-place window of the last correction as the corrected clockwise in-place window for output.

[0085] When the system controls the side positioning pin to start inserting in the corrected clockwise in-place window, the side positioning pin can be accurately inserted when the turntable is in place. At this time, due to the small friction, the side positioning pin entry time is the least, and the operation of the hydraulic turntable is more stable.

[0086] Refer to Figure 2 , the correction adjustment method of the initial clockwise in-place window includes the following steps:

[0087] Step S200: Determine the corrected clockwise in-place window according to the initial clockwise in-place window and the preset in-place adjustment amount, and replace the initial clockwise in-place window.

[0088] The in-place adjustment amount is the change amount for correcting the initial clockwise in-place window when the turntable rotates clockwise each time, which will not be elaborated here. The corrected clockwise in-place window is the sum or difference of the initial clockwise in-place window and the in-place adjustment amount. After adjusting the initial clockwise in-place window with the in-place adjustment amount, the side positioning pin starts to insert according to the new corrected initial clockwise in-place window.

[0089] Step S201: Control the turntable to rotate clockwise again multiple times, control the side positioning pin to insert and lock in the corrected clockwise in-place window, and obtain the corrected side positioning pin entry time.

[0090] In each subsequent cycle of clockwise rotation and reverse rotation of each mold, it is necessary to re-obtain the corrected side positioning pin entry time in the corrected clockwise in-place window, so as to be able to compare the corrected side positioning pin entry time with the corrected side positioning pin entry time of the previous mold. After correcting the initial clockwise in-place window to obtain the corrected clockwise in-place window, the side positioning pin entry time obtained at this time is the corrected side positioning pin entry time. The method for obtaining the corrected side positioning pin entry time is the same as that of the side positioning pin entry time, which will not be elaborated here.

[0091] Step S202: Determine the time deviation amount according to the side positioning pin entry time and the corrected side positioning pin entry time.

[0092] The time deviation amount refers to the difference between the corrected side positioning pin entry time of the current mold and the side positioning pin entry time of the previous mold.

[0093] Step S203: Match the in-place adjustment deviation amount according to the time deviation amount.

[0094] During the adjustment process of each mold pair's initial smooth in-place window, the in-place adjustment amount needs to be adjusted so that the in-place adjustment amount gradually converges. The in-place adjustment deviation is the change amount of the in-place adjustment amount.

[0095] The in-place adjustment deviation is proportional to the time deviation. The larger the time deviation, the larger the in-place adjustment deviation.

[0096] Step S204: adjusting the in-place adjustment amount according to the in-place adjustment deviation amount until the in-place adjustment amount is zero.

[0097] During the entire adjustment process of the turntable, the in-place adjustment amount needs to be gradually adjusted according to the in-place adjustment deviation, so that the in-place adjustment amount converges to 0 and the time deviation also converges to 0. At this time, the side positioning pin entry time is the smallest and the correction straight into place window is the most accurate.

[0098] Reference Figure 3 The turntable has two symmetrical working positions, and the rotation adjustment method includes the following steps:

[0099] Different types of hydraulic turntables have different numbers of working positions. In this embodiment, a turntable with two symmetrical working positions is analyzed. The turntable has working positions at two angles, 0° and 180°. When the turntable rotates forward, the forward positioning window of the 0° working position can be adjusted. During the rotation adjustment process, in order to improve efficiency, the reverse positioning window of the 180° working position can be adjusted accordingly.

[0100] Step S300: determining the adjacent workstation angle according to the preset workstation, and determining the reversal angle according to the adjacent workstation angle.

[0101] The work station is the work station determined by the technicians when designing the hydraulic turntable, and will not be described in detail here. The adjacent work station angle is the circumferential angle between two work stations. In this embodiment, the adjacent work station angle is 180°. The reversal angle is the rotation angle when the turntable is rotated and adjusted. When the turntable is rotated and adjusted, it rotates from the 0° work station to the 180° work station. Therefore, the reversal angle is the same as the adjacent work station angle, that is, 180°.

[0102] The angle of rotation of each mold when it is rotated forward again in step S102 is the same as the reversal angle in this step, which is also 180°, so that the turntable can rotate forward from the 180° working position to the 0° working position.

[0103] Step S301: Control the turntable to rotate counterclockwise at a reverse angle, insert and lock the control side positioning pin at a preset initial reverse position window, and obtain the reverse side positioning pin advancement time.

[0104] In this embodiment, the method for obtaining the reverse-side positioning pin entry time is the same as that in step S100, which will not be elaborated here. The initial reverse in-place window is the position where the side positioning pin starts to be inserted when the turntable rotates reversely, which is set by the technician and will not be elaborated here. The reverse-side positioning pin entry time is the side positioning pin entry time obtained at the 180° working station when the turntable rotates reversely.

[0105] Step S302: Correct and adjust the initial reverse in-place window, and control the turntable to perform a rotary adjustment multiple times after completing the forward rotation adjustment.

[0106] This step is the same as step S102 and will not be elaborated here. The forward rotation adjustment and the rotary adjustment are performed alternately.

[0107] Step S303: Control the side positioning pin to insert and lock at the corrected initial reverse in-place window to control the reverse-side positioning pin entry time to the minimum value, output the final initial reverse in-place window and define it as the corrected reverse in-place window.

[0108] The method for determining the corrected reverse in-place window in this step is the same as that in step S103 and will not be elaborated here.

[0109] Refer to Figure 4 , after correcting the forward in-place window and the reverse in-place window, the tail section pressure also needs to be corrected. The tail section pressure is the force applied to the turntable by the system when the turntable approaches the working station to drive the turntable to decelerate. The speed of the turntable when it reaches the in-place determined by the tail section pressure affects the insertion of the side positioning pin. The method for correcting the tail section pressure includes the following steps:

[0110] Step S400: Obtain the rotation direction of the turntable.

[0111] There is a sensor on the turntable. The sensor can record the rotation direction of the turntable and record it in the system, and the system can directly read it.

[0112] Step S401: Determine the tail section pressure type according to the rotation direction. The tail section pressure type includes the forward rotation tail section pressure and the reverse rotation tail section pressure.

[0113] For a two-station turntable, the tail section pressure type includes the forward rotation tail section pressure when the turntable approaches the 0° working station and the reverse rotation tail section pressure when the turntable approaches the 180° working station. According to the rotation direction of the turntable, it is determined whether to correct the forward rotation tail section pressure or the reverse rotation tail section pressure. When the turntable rotates forward, the forward rotation tail section pressure is corrected, and when the turntable rotates reversely, the reverse rotation tail section pressure is corrected.

[0114] Step S4021: Based on the forward rotation tail section pressure, obtain the current forward rotation pressure value during forward rotation.

[0115] The then forward rotation pressure value refers to the pressure at the end of the forward rotation section when the turntable rotates forward to the 0° working station in the current mold. There is a pressure sensor inside the turntable, and the then forward rotation pressure value is obtained through the pressure sensor.

[0116] Step S40211: Determine the adjustment amount of the in-place window according to the corrected forward in-place window and the then forward in-place window corresponding to the preset then forward rotation pressure value.

[0117] The then forward in-place window refers to the corrected forward in-place window of the current mold, and the adjustment amount of the in-place window refers to the change amount after adjusting the corrected forward in-place window. The adjustment amount of the in-place window is the difference between the corrected forward in-place window of the previous mold and the then forward in-place window of the current mold.

[0118] Step S40212: Match the forward rotation pressure adjustment amount according to the adjustment amount of the in-place window.

[0119] The forward rotation pressure adjustment amount refers to the amount of adjustment to the then forward rotation pressure value. The forward rotation pressure adjustment amount is proportional to the adjustment amount of the in-place window. The smaller the adjustment amount of the in-place window, the smaller the forward rotation pressure adjustment amount.

[0120] Step S40213: Adjust the then forward rotation pressure value according to the forward rotation pressure adjustment amount to obtain the corrected forward rotation pressure at the end section, and output the corrected forward rotation pressure at the end section.

[0121] After adjusting the then forward rotation pressure value through the forward rotation pressure adjustment amount, the forward rotation pressure at the end section applied by the system to the turntable can meet the speed requirements of the turntable at the working station close to 0°.

[0122] Refer to Figure 5 , the tail section pressure correction method further includes the following steps:

[0123] Step S4022: Based on the reverse rotation pressure at the end section, obtain the then reverse rotation pressure value during rotation.

[0124] The then reverse rotation pressure value refers to the reverse rotation pressure at the end section when the turntable rotates reversely to the 180° working station in the current mold. The acquisition method is the same as that in Step S4021 and will not be elaborated here.

[0125] Step S40221: Determine the adjustment amount of the reverse in-place window according to the corrected reverse in-place window and the then reverse in-place window corresponding to the preset then reverse rotation pressure value.

[0126] The same as Step S40211 and will not be elaborated here.

[0127] Step S40222: Match the reverse rotation pressure adjustment amount according to the adjustment amount of the reverse in-place window.

[0128] The same as Step S40212 and will not be elaborated here.

[0129] Step S40223: Adjust the current reverse pressure value according to the reverse pressure adjustment amount to obtain the corrected reverse tail pressure, and output the corrected reverse tail pressure.

[0130] Same as step S40213, which will not be elaborated here.

[0131] Refer to Figure 6 , the tail pressure correction method further includes the following steps:

[0132] There is still a certain error after the tail pressure is corrected, which will affect the speed when the turntable reaches its position each time. It is necessary to control the speed when the turntable reaches its position each time. Here, the forward rotation tail pressure is analyzed, and the reverse rotation tail pressure is the same, which will not be elaborated here.

[0133] Step S500: Obtain the mold turning-in place speed when the turntable is rotating forward and the side positioning pin is inserted and locked.

[0134] The mold turning-in place speed refers to the speed when the turntable rotates to its position. The mold turning-in place speed is determined by an encoder set on the turntable.

[0135] Step S501: When the mold turning-in place speed is greater than the preset calibrated steady speed, reduce the corrected forward rotation tail pressure by the preset pressure reduction amount.

[0136] The calibrated steady speed is the appropriate speed set by technicians when the turntable reaches its position. The calibration of this parameter is based on a large number of test results and will not be elaborated here. When the mold turning-in place speed is greater than the calibrated steady speed, it is considered that the impact sound when the turntable reaches its position is relatively large and needs to be adjusted.

[0137] If the mold turning-in place speed is not greater than the calibrated steady speed, there is no need to adjust the forward rotation tail pressure again. If the mold turning-in place speed is greater than the calibrated steady speed, at this time, reduce the forward rotation tail pressure of the current mold by the pressure reduction amount. The pressure reduction amount is the adjustment amount set by technicians when adjusting the tail pressure again and will not be elaborated here. Reduce the forward rotation tail pressure of the current mold so that the forward rotation tail pressure of the next mold is reduced.

[0138] Step S502: When the mold turning-in place speed is less than the preset calibrated movement speed, increase the corrected forward rotation tail pressure by the preset pressure increase amount.

[0139] The calibrated movement speed is the minimum speed set by technicians when the turntable reaches its position. The calibration of this parameter is based on a large number of test results and will not be elaborated here. When the mold turning-in place speed is less than the calibrated movement speed, at this time, it is considered that the rotation has almost no movement, so the mold turning-in place speed of the turntable is greater than the calibrated movement speed.

[0140] When the die transfer in-place speed is not less than the calibrated moving speed, there is no need to adjust the die transfer in-place speed. When the die transfer in-place speed is less than the calibrated moving speed, the pressure of the forward rotation tail section of the current die is increased by a pressure boost amount. The pressure boost amount is the adjustment amount set by the technician when readjusting the tail section pressure, which will not be elaborated here. Boosting the pressure of the forward rotation tail section of the current die increases the pressure of the forward rotation tail section of the next die.

[0141] Using the load pressure when the system pressure detection side positioning pin is inserted as an auxiliary detection means to adjust the control parameters of the turntable. The system pressure is the hydraulic oil pressure of the system on the side positioning pin when the side positioning pin enters. When there is friction between the side positioning pin and the turntable and it cannot be accurately inserted, the system pressure is relatively large. The auxiliary detection means includes the following steps:

[0142] Step S600: When the side positioning pin is inserted and locked, obtain the initial system pressure feedback amount.

[0143] The initial system pressure feedback amount is the system pressure when the turntable rotates to the working station and the side positioning pin is inserted. The initial system pressure feedback amount is obtained through a pressure sensor integrated in the equipment.

[0144] Step S601: According to the corrected forward in-place window, control the side positioning pin to insert cyclically, and obtain the corrected system pressure feedback amount again.

[0145] After correcting the initial forward in-place window, the friction between the side positioning pin and the turntable will change. At this time, when controlling the side positioning pin to insert cyclically according to the corrected forward in-place window, obtain the corrected system pressure feedback amount again. The corrected system pressure feedback amount is the system pressure re-obtained after correcting the initial forward in-place window. The obtaining method of the corrected system pressure feedback amount is the same as that of the initial system pressure feedback amount in step S600, which will not be elaborated here.

[0146] Step S602: Determine the pressure deviation amount according to the initial system pressure feedback amount and the corrected system pressure feedback amount.

[0147] The pressure deviation value is the difference between the initial system pressure feedback amount obtained in the previous die and the corrected system pressure feedback amount obtained in the current die.

[0148] Step S603: Match the in-place adjustment deviation amount according to the pressure deviation amount, and adjust the in-place adjustment amount according to the in-place adjustment deviation amount.

[0149] The pressure deviation amount is proportional to the in-place adjustment deviation amount. The larger the pressure deviation amount, the larger the in-place adjustment deviation amount. Therefore, adjust the in-place adjustment deviation amount through the pressure deviation amount, and then adjust the in-place adjustment amount.

[0150] Step S604: Adjust the corrected forward in-place window according to the in-place adjustment amount.

[0151] After adjusting the in-place adjustment amount, adjust the correction in-place window of the current die to be applied to the adjustment of the next die.

[0152] Step S605: Loop the above steps until the pressure deviation amount is 0 and the correction system pressure feedback amount reaches the minimum value, and output the correction in-place window.

[0153] The turntable rotates forward and backward alternately, and the system pressure is adjusted in a loop to make the system pressure reach the minimum to meet the requirements. At this time, the friction between the side positioning pin and the turntable is the smallest, and the forward in-place window and the reverse in-place window are the most accurate.

[0154] The system pressure is used for system anomaly warning. The system anomaly warning method includes the following steps:

[0155] Step S700: After correcting the initial forward in-place window, re-obtain the side positioning pin entry time.

[0156] It is the same as step S102 and will not be elaborated here. After correcting the initial forward in-place window and re-determining the side positioning pin entry time, the side positioning pin entry time of the current die can be compared with that of the previous die at this time.

[0157] Step S701: Determine the time increase or decrease direction according to the successively obtained side positioning pin entry times.

[0158] The time increase or decrease direction refers to the change trend of time, specifically whether the time increases or decreases. The time increase or decrease direction is determined by comparing the side positioning pin entry time of the current die with that of the previous die.

[0159] Step S702: Determine the pressure increase or decrease direction according to the initial system pressure feedback amount and the correction system pressure feedback amount.

[0160] The pressure increase or decrease direction refers to the change trend of the system pressure, specifically whether the system pressure increases or decreases. By comparing the correction system pressure feedback amount of the current die with the initial system pressure feedback amount of the previous die, the pressure increase or decrease direction can be determined.

[0161] Step S703: Issue an alarm prompt if and only if the time increase or decrease direction is inconsistent with the pressure increase or decrease direction.

[0162] If the time increase or decrease direction is consistent with the pressure increase or decrease direction, that is, the side positioning pin entry time and the system pressure increase or decrease simultaneously, the equipment is normal at this time and no alarm is processed.

[0163] When the time increase / decrease direction is inconsistent with the pressure increase / decrease direction, that is, the side positioning pin entry time decreases while the system pressure increases, it may indicate a malfunction in the equipment. It is possible that the oil cylinder or valve body is stuck, and an alarm needs to be issued to prompt the staff to perform maintenance.

[0164] After the hydraulic turntable is adjusted, continuously monitor its operating status during the subsequent operation of the turntable. If the error problem reappears in the turntable, the system will restart the automatic adjustment program. The monitoring method includes the following steps:

[0165] Step S800: After the hydraulic turntable is adjusted, continuously obtain the side positioning pin entry monitoring time.

[0166] The side positioning pin entry monitoring time is the side positioning pin entry time obtained after the hydraulic turntable is adjusted and during normal operation. The method for obtaining the side positioning pin entry monitoring time is the same as that in step S100, and will not be elaborated here.

[0167] Step S801: Determine the monitoring time deviation based on the side positioning pin entry monitoring time and the minimum side positioning pin entry time.

[0168] The minimum side positioning pin entry time is recorded by the system in step S103.

[0169] Compare the side positioning pin entry monitoring time with the minimum side positioning pin entry time, and the monitoring time deviation is the difference between the two.

[0170] Step S802: When and only when the monitoring time deviation is greater than the preset reference time deviation, issue an alarm prompt and re-perform the intelligent parameter adjustment of the hydraulic turntable.

[0171] The reference time deviation is a parameter set by the technician for the system to re-adjust the turntable. Whether the turntable needs to be re-adjusted depends on the reference time deviation, and will not be elaborated here.

[0172] When the reference time deviation is not greater than the reference time deviation, it is considered that the error is small, and no adjustment is made at this time.

[0173] When the reference time deviation is greater than the reference time deviation, it indicates that a large error has occurred in the turntable. At this time, the system re-adjusts the parameters of the turntable according to steps S100 to S103.

[0174] Based on the same inventive concept, an embodiment of the present invention provides an intelligent control parameter adjustment system for the hydraulic turntable of an injection molding machine.

[0175] An intelligent control parameter adjustment system for the hydraulic turntable of an injection molding machine includes:

[0176] An acquisition module, configured to acquire the side positioning pin entry time, the corrected side positioning pin entry time, the reverse side positioning pin entry time, the reverse side positioning pin entry time, the current forward rotation pressure value during forward rotation, the current reverse rotation pressure value during rotation, the mold rotation in-place speed, the initial system pressure feedback amount, the corrected system pressure feedback amount, and the side positioning pin entry monitoring time.

[0177] A memory, configured to store a program of an intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine.

[0178] A processor, the program in the memory can be loaded and executed by the processor and implement an intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine.

[0179] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine, characterized in that: include: At a preset starting fixed position, the turntable is controlled to rotate clockwise at a preset initial forward rotation angle, and the side positioning pin is controlled to be inserted and locked at a preset initial forward positioning window to obtain the side positioning pin entry time; The positioning pin on the control side is withdrawn, and the turntable is rotated and adjusted using the preset rotation adjustment method; Correct and adjust the initial straight-in-place window, and control the turntable to rotate clockwise again several times; The side locating pin insertion lock is controlled in the initial smooth position window after correction to control the side locating pin entry time to the minimum value, the minimum value of the side locating pin entry time is recorded and defined as the minimum side locating pin entry time, and the final initial smooth position window is output and defined as the correction smooth position window.

2. According to claim 1, the intelligent adjustment algorithm for control parameters of the hydraulic turntable of the injection molding machine is characterized in that: The correction adjustment methods for the initial smooth position window include: Determine a correction in-place window according to the initial in-place window and a preset in-place adjustment amount and replace the initial in-place window; The control dial is rotated clockwise again for several times, the positioning pin on the control side is inserted and locked in the correction window, and the correction side positioning pin entry time is obtained; Determine the time deviation according to the side positioning pin advancing time and the correction side positioning pin advancing time; Adjust the deviation amount according to the time deviation amount matching; The in-place adjustment amount is adjusted according to the in-place adjustment deviation amount until the in-place adjustment amount is 0.

3. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 1 is characterized in that: The turntable has two symmetrical working positions, and the rotation adjustment methods include: Determine the adjacent workstation angle according to the preset workstation, and determine the reversal angle according to the adjacent workstation angle; Control the turntable to rotate counterclockwise at the reverse angle, insert and lock the positioning pin on the control side at the preset initial reverse position window, and obtain the reverse side positioning pin entry time; Correct the initial reverse positioning window and control the turntable several times to make a rotation adjustment after completing the forward rotation adjustment; The insertion and locking of the positioning pin on the control side of the initial reverse position window after correction is used to control the advancement time of the positioning pin on the reverse side to a minimum value, and the final initial reverse position window is output and defined as the correction reverse position window.

4. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 3 is characterized in that: After correcting the forward and reverse windows, the tail pressure also needs to be corrected. The tail pressure is used to drive the turntable to rotate. The tail pressure correction methods include: Get the rotation direction of the turntable; Determine the tail section pressure type according to the rotation direction, and the tail section pressure type includes forward rotation tail section pressure and reverse rotation tail section pressure; Based on the pressure at the end of the forward rotation, the forward rotation pressure value at the time of the forward rotation is obtained; Determine the adjustment amount of the smooth position window according to the corrected smooth position window and the current smooth position window corresponding to the preset current smooth pressure value; Match the forward pressure adjustment amount according to the forward position window adjustment amount; The current forward pressure value is adjusted according to the forward pressure adjustment amount to obtain the corrected forward tail-end pressure, and the corrected forward tail-end pressure is output.

5. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 4 is characterized in that: Also includes: Based on the reversal tail pressure, the reversal pressure value at the time of rotation is obtained; Determine the reverse position window adjustment amount according to the corrected reverse position window and the reverse position window corresponding to the preset reverse pressure value at that time; Match the reversal pressure adjustment amount according to the reversal window adjustment amount; The current reversal pressure value is adjusted according to the reversal pressure adjustment amount to obtain the corrected reversal tail-end pressure, and the corrected reversal tail-end pressure is output.

6. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 4 is characterized in that: Tail section pressure correction methods also include: Get the mold rotation speed when the turntable rotates clockwise and the side positioning pin is inserted and locked; When the mold rotation speed is greater than the preset calibrated steady speed, the pressure of the corrective forward rotation tail section is reduced by the preset pressure reduction amount; When the mold rotation speed is lower than the preset calibrated movement speed, the pressure of the corrective forward rotation tail section is increased by the preset pressure increase amount.

7. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 2, characterized in that: The load pressure when the positioning pin is inserted on the system pressure detection side is used as an auxiliary detection means to adjust the control parameters of the turntable. The auxiliary detection means include: When the side positioning pin is inserted and locked, the initial system pressure feedback is obtained; According to the correction, the positioning pin on the control side of the window is inserted cyclically to obtain the pressure feedback of the correction system again; Determine the pressure deviation amount according to the initial system pressure feedback amount and the correction system pressure feedback amount; Match the in-place adjustment deviation amount according to the pressure deviation amount, and adjust the in-place adjustment amount according to the in-place adjustment deviation amount; Adjust the correction smooth in-place window according to the in-place adjustment amount; The above steps are repeated until the pressure deviation is 0 and the pressure feedback of the correction system reaches the minimum value, and the correction is output to the desired window.

8. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 7, characterized in that: System pressure is used for system abnormality warning. System abnormality warning methods include: After the initial alignment window is corrected, the side positioning pin entry time is re-obtained; Determine the direction of time increase or decrease according to the side positioning pin advance time obtained successively; Determine the direction of pressure increase or decrease according to the initial system pressure feedback and the correction system pressure feedback; An alarm is issued if and only if the direction of time increase or decrease is inconsistent with the direction of pressure increase or decrease.

9. The intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to claim 1, characterized in that: After the hydraulic turntable is adjusted, the operating status is continuously monitored during the subsequent operation of the turntable. The monitoring methods include: After the hydraulic turntable is adjusted, the side positioning pin monitoring time is continuously obtained; Determine the monitoring time deviation according to the side positioning pin entry monitoring time and the minimum side positioning pin entry time; When and only when the monitoring time deviation is greater than the preset reference time deviation, an alarm is issued and the intelligent parameters of the hydraulic turntable are readjusted.

10. An intelligent control parameter adjustment system for a hydraulic turntable of an injection molding machine, characterized in that: include: An acquisition module is used to acquire the side positioning pin entry time, the correction side positioning pin entry time, the reverse side positioning pin entry time, the reverse side positioning pin entry time, the forward pressure value at the time of forward rotation, the reverse pressure value at the time of reverse rotation, the mold rotation speed, the initial system pressure feedback, the correction system pressure feedback and the side positioning pin entry monitoring time; A memory for storing a program of an intelligent adjustment algorithm for control parameters of a hydraulic turntable of an injection molding machine according to any one of claims 1 to 9; The program in the processor memory can be loaded and executed by the processor and realize an intelligent adjustment algorithm for the control parameters of the hydraulic turntable of the injection molding machine.

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