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CN-122027970-A - Loudspeaker installation production line and control method thereof

CN122027970ACN 122027970 ACN122027970 ACN 122027970ACN-122027970-A

Abstract

The application provides a loudspeaker mounting production line and a control method thereof, and relates to the technical field of vehicle-mounted loudspeaker production, wherein the production line comprises a conveying assembly, a loudspeaker mounting assembly and a loudspeaker mounting assembly, wherein the conveying assembly comprises a production side conveying section and a return side conveying section which are arranged side by side and have opposite running directions; the system comprises a production side conveying section, a return side conveying section, a transfer assembly, a control unit, a sensing assembly, a transfer assembly, a first driving assembly driving the production side conveying section and a second driving assembly driving the return side conveying section, wherein the production side conveying section is configured to bear and convey a plurality of empty bases serving as redundant reserves in operation, the transfer assembly is arranged at the tail end of the production side conveying section and is used for removing assembled finished speaker products and transferring the empty bases after the finished speaker products are removed to the starting point of the return side conveying section, the control unit is respectively connected with the sensing assembly, the transfer assembly, the first driving assembly driving the production side conveying section and the second driving assembly driving the return side conveying section, and the system is configured to adjust the operation speed of the return side conveying section according to feedback signals of the sensing assembly, so that the empty bases serving as the redundant reserves borne on the transfer assembly can be used for maintaining base supply continuity at the starting point of the production side conveying section.

Inventors

  • WU YAN
  • ZHANG JINGXIANG
  • PENG HUAIJUN

Assignees

  • 天津博顿电子有限公司

Dates

Publication Date
20260512
Application Date
20260303

Claims (10)

  1. 1. A speaker mounting line, comprising: The conveying assembly comprises a production side conveying section (2) and a return side conveying section (1) which are arranged side by side and have opposite running directions, wherein the return side conveying section (1) is configured to bear and convey a plurality of empty bases serving as redundancy reserves in operation; The plurality of mounting stations are sequentially arranged along one side of the production side conveying section (2) and are used for sequentially assembling speakers borne on the base; the transfer component (3) is arranged at the tail end of the production side conveying section (2) and is used for removing the finished speaker products after assembly and transferring the empty bases after the finished speaker products are removed to the starting point of the return side conveying section (1); A sensing assembly comprising a first sensor provided at the start of the production side conveyor section (2), a second sensor provided at the end of the production side conveyor section, and a third sensor provided at the start of the return side conveyor section (1); the control unit is respectively connected with the sensing assembly, the transferring assembly (3), a first driving assembly for driving the production side conveying section (2) and a second driving assembly for driving the return side conveying section (1); The control unit is configured to adjust the operating speed of the return-side conveying section (1) by controlling the second drive assembly in dependence on the feedback signal of the sensor assembly, so as to maintain the base supply continuity at the start of the production-side conveying section (2) with redundant reserve bases carried thereon.
  2. 2. The speaker mounting line according to claim 1, wherein the transfer assembly (3) includes a flip-off robot including: the clamping mechanism is used for grabbing a base provided with a loudspeaker and positioned at the tail end of the production side conveying section (2); The overturning driving mechanism is in driving connection with the clamping mechanism and is used for driving the grabbed base to rotate 180 degrees so that the opening of the loudspeaker faces downwards; The separation station is arranged below the rotating path of the overturning driving mechanism and corresponds to the overturned position of the clamping mechanism; when the base is turned over to the position that the loudspeaker opening faces downwards, the loudspeaker is separated from the base under the action of gravity or assistance and falls to the separation station.
  3. 3. The speaker mounting line of claim 2, wherein the separation station comprises: A finished product receiving part for receiving and transferring the separated finished speaker product; The empty base positioning part is used for receiving the separated empty base and correcting the position of the empty base, and the clamping mechanism of the overturning and separating manipulator is used for directly transferring the empty base corrected by the empty base positioning part and placing the empty base at the starting point of the return side conveying section (1).
  4. 4. A method of controlling a loudspeaker mounting line, based on a loudspeaker mounting line according to any one of claims 1-3, comprising the steps of: The first driving component and the transferring component (3) are cooperatively controlled so that the production side conveying section (2) continuously runs at a constant speed, and the transferring component (3) is triggered to execute an operation cycle of removing a finished product and placing an empty base once every time when the second sensor detects that one base reaches an end station; Monitoring a feed preparation state of the return side conveying section (1) at a starting point adjacent to the production side conveying section (2) by feedback of the first sensor and the third sensor, wherein the feed preparation state comprises whether an empty base for the supply exists in the area; And if the empty base in the feeding preparation state is monitored to be in short supply, controlling the second driving assembly to increase the operation speed of the return side conveying section (1) so as to enable the redundant reserved empty base carried on the second driving assembly to move to the starting point side of the production side conveying section (2) more quickly until the feeding preparation state is recovered to be normal.
  5. 5. A control method of a speaker installation line according to claim 4, wherein the control of the second driving assembly to increase the operation speed of the return side transfer section (1) comprises the steps of: Acquiring a shortage urgency degree reflected by the feeding preparation state, and determining a speed lifting amplitude based on the shortage urgency degree; Controlling the second driving assembly to run at an increased speed by the speed increasing amplitude; and after the feeding preparation state is restored to be normal, controlling the second driving assembly to smoothly reduce the operation speed to the reference speed.
  6. 6. The method of controlling a speaker mounting line according to claim 5, wherein said obtaining the shortage urgency reflected by the supply preparation state includes the steps of: Counting the number of times the empty base passes through the start point of the return side conveying section (1) based on the detection signal of the third sensor in a preset time period, and calculating the number of times of passing in unit time as a supply frequency; acquiring an actual average operation period of the transfer assembly (3) in the preset time period, and calculating the reciprocal of the actual average operation period as a demand frequency; calculating a difference or ratio of the supply frequency to the demand frequency; based on the difference or ratio, in combination with the real-time detection signal of the first sensor, the urgency of the shortage is determined.
  7. 7. The method of controlling a speaker installation line according to claim 6, wherein the determining the shortage urgency degree based on the difference or ratio in combination with a real-time detection signal of the first sensor includes the steps of: Based on a detection signal sequence of the third sensor in a historical time, establishing a time interval distribution model of the empty base reaching the starting point of the return side conveying section (1); Predicting, based on the time interval distribution model, the expected number of times that an empty base will reach the start of the return-side conveying section (1) within a preset future time window immediately after the current moment; calculating an expected number of demands for an empty base from a start point of the production-side transfer section (2) within the time window based on the demand frequency and a duration of the preset future time window; Comparing the expected times with the expected demand times, and integrating to calculate a quantized shortage urgency level value in combination with whether the first sensor currently detects an instant state of an empty base at the start of the production-side conveying section (2); Wherein the shortage of urgency level value is significantly increased when the first sensor is not currently detecting an empty base.
  8. 8. A control method of a speaker installation line according to claim 6, wherein the acquiring of an actual average operation cycle of the transfer assembly (3) in the preset period of time includes the steps of: Acquiring a sequence of process completion time of a designated upstream station on the production side conveying section (2) and a sequence of operation trigger time of the transfer assembly (3); Determining a fixed transmission time based on the running speed of the production side conveying section (2) and the distance from the appointed upstream station to the end station, and associating each operation of the transfer assembly (3) with a process completion time of the appointed upstream station earlier than the fixed transmission time at the operation time to obtain an association relation; According to the association relation, calculating a demand side average period based on the completion time of the designated upstream station process and an execution side average period based on the operation triggering time of the transfer assembly (3); And carrying out fusion processing on the demand side average period and the execution side average period, and taking a fusion result as the actual average operation period.
  9. 9. The control method of a speaker installation line according to claim 4, wherein the supply preparation state further includes a total amount variation trend of empty bases as redundant reserves carried on the return-side transfer section (1); said monitoring of the feed preparation state of the return-side conveying section (1) adjacent to the start of the production-side conveying section (2) further comprises the following steps: If the total amount change trend is judged to be continuously reduced, starting analysis, and judging a system unbalance reason which leads to the total amount change trend; The system imbalance causes include an operational cycle of the transfer assembly (3) to place an empty base, and a long-term average running speed of the return-side conveying section (1) that does not match a consumption rate of the production-side conveying section (2).
  10. 10. The method of controlling a speaker mounting line according to claim 9, further comprising, after the judging of the cause of the system imbalance that causes the total amount change trend, the steps of: if it is determined that the system imbalance cause is that the long-term average running speed of the return-side transfer section (1) does not match the consumption rate of the production-side transfer section (2), a reference speed adaptive drift adjustment strategy is executed, the strategy comprising the steps of: in an evaluation window covering a plurality of continuous production periods, counting accumulated duration of speed-up control on the return side conveying section (1) due to early warning of a feeding preparation state, and comparing the accumulated duration with the total duration of the evaluation window to obtain a proportion evaluation result of the speed-up intervention; According to the proportion evaluation result of the accelerating intervention, the adjusting direction and the adjusting amplitude of the reference running speed of the return side conveying section (1) are decided, wherein the higher the proportion of the accelerating intervention is, the larger the upward adjusting amplitude is decided; and updating the current reference running speed of the return side conveying section (1) according to the determined adjusting direction and adjusting amplitude, and setting the updated speed as a new reference running speed for subsequent long-term running and control.

Description

Loudspeaker installation production line and control method thereof Technical Field The invention belongs to the technical field of vehicle-mounted loudspeaker production, and particularly relates to a loudspeaker installation production line and a control method thereof. Background In an automated assembly line for speakers, a conveyor belt is typically used to circulate a base (or tray) through each assembly station in sequence to complete the sequential installation of the components of the speaker. In order to improve the production efficiency and the automation degree, a common layout is to use an oval or similar closed loop conveyor belt system, so that the base for carrying the workpiece can return to the starting point again after completing one assembly cycle, and the workpiece can be reused. However, in actual operation, such a closed-cycle base supply system faces a significant problem in that the continuity of the base supply is difficult to be stably ensured. In particular, when the assembled speaker is removed at the end of the production line, the empty chassis needs to be returned to the beginning of the production line in time to carry a new workpiece. If the feeding back process is blocked due to the delay of the picking and placing action of the mechanical arm, the fluctuation of the speed of the conveyor belt or the uneven distribution of empty bases on the return path, no base is available at the starting point of the production line. At this time, even if there is an idle base (i.e., redundant reserve) at other positions on the return path, the idle base cannot be allocated to the demand point in time due to lack of an effective coordination mechanism, so that the upstream assembly station is forced to wait, the production beat is broken, and the overall efficiency is reduced. In the prior art, the number of initial throwing bases is increased or manual intervention is simply needed to deal with the problem, and a self-adaptive dynamic guarantee mechanism embedded in a system is lacked. Disclosure of Invention In view of the above-mentioned drawbacks or shortcomings in the prior art, a speaker mounting line and a control method thereof are provided. In a first aspect, the present application proposes a speaker installation line comprising: the conveying assembly comprises a production side conveying section and a return side conveying section which are arranged side by side and have opposite running directions, wherein the return side conveying section is configured to bear and convey a plurality of empty bases serving as redundant reserves in operation; The plurality of mounting stations are sequentially arranged along one side of the production side conveying section and are used for sequentially assembling speakers borne on the base; The transfer assembly is arranged at the tail end of the production side conveying section and is used for removing the finished speaker products after assembly and transferring the empty base after the finished speaker products are removed to the starting point of the return side conveying section; A sensor assembly including a first sensor provided at a start point of the production-side conveying section, a second sensor provided at an end of the production-side conveying section, and a third sensor provided at a start point of the return-side conveying section; The control unit is respectively connected with the sensing assembly, the transfer assembly, a first driving assembly for driving the production side conveying section and a second driving assembly for driving the return side conveying section; the control unit is configured to adjust the operating speed of the return side conveyor section by controlling the second drive assembly in accordance with the feedback signal of the sensing assembly so as to maintain base supply continuity at the start of the production side conveyor section with redundant reserve empty bases carried thereon. According to the technical scheme provided by the application, the transfer assembly comprises a turnover separation manipulator, and the turnover separation manipulator comprises: The clamping mechanism is used for grabbing a base provided with a loudspeaker and positioned at the tail end of the production side conveying section; The overturning driving mechanism is in driving connection with the clamping mechanism and is used for driving the grabbed base to rotate 180 degrees so that the opening of the loudspeaker faces downwards; The separation station is arranged below the rotating path of the overturning driving mechanism and corresponds to the overturned position of the clamping mechanism; when the base is turned over to the position that the loudspeaker opening faces downwards, the loudspeaker is separated from the base under the action of gravity or assistance and falls to the separation station. According to the technical scheme provided by the application, the separation station comprises: A finished p