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CN-122027968-A - Machine vision-based automobile loudspeaker magnetic circuit bonding alignment method

CN122027968ACN 122027968 ACN122027968 ACN 122027968ACN-122027968-A

Abstract

The application discloses an automobile loudspeaker magnetic circuit bonding alignment method based on machine vision, which relates to the technical field of loudspeaker assembly and comprises a first step of setting a structural foundation, wherein the first step is based on a workbench provided with a controller, a jig is placed on the workbench, a containing groove for placing the bottom of a T iron is formed in the top of the jig, a visual alignment mechanism is arranged on the workbench and used for controlling the visual alignment mechanism by the controller, a second step is used for bonding alignment logic, and comprises the steps of controlling the visual alignment mechanism to place the T iron into the jig, controlling the visual alignment mechanism to place a magnet on the T iron when a T iron upper surface dispensing finishing signal triggered by an operator is received, and conducting lamination and solidification treatment on the magnet, and controlling the visual alignment mechanism to place an upper clamping plate on the magnet when the magnet upper surface dispensing finishing signal triggered by the operator is received. The application has the effect of improving the production consistency of products.

Inventors

  • WU GUOFENG

Assignees

  • 深圳市音源科技有限公司

Dates

Publication Date
20260512
Application Date
20260122

Claims (9)

  1. 1. The machine vision-based automobile loudspeaker magnetic circuit bonding alignment method is characterized by comprising the following steps of: Step one, setting a structural foundation, which comprises the following steps: based on a workbench provided with a controller; a jig is placed on the workbench, and a containing groove for placing the bottom of the T iron is formed in the top of the jig; The workbench is provided with a visual alignment mechanism so as to control the visual alignment mechanism by a controller; step two, bonding the alignment logic, which comprises configuring the controller to: controlling a visual alignment mechanism to align the T iron into the jig; When a T iron upper surface dispensing finishing signal triggered by an operator is received, controlling a visual alignment mechanism to align a magnet on the T iron, and performing lamination and solidification treatment on the magnet; When receiving the magnet upper surface dispensing finishing signal triggered by an operator, controlling the visual alignment mechanism to align the upper clamping plate on the magnet, and performing lamination and solidification treatment on the upper clamping plate.
  2. 2. The machine vision-based automobile loudspeaker magnetic circuit bonding alignment method is characterized in that the vision alignment mechanism comprises a mechanical arm (1), an assembly frame (2), a protective cylinder (3), a camera (4), an adsorption component (5), a pressing component (6) and a curing component (7), wherein a base of the mechanical arm (1) is fixedly connected to a workbench, the assembly frame (2) is fixedly installed at the tail end of the mechanical arm (1), the protective cylinder (3) is fixedly connected to one end of the assembly frame (2) which is far away from the mechanical arm (1), the protective cylinder (3) is hollow cylindrical and is far away from an opening at one end of the assembly frame (2), the camera (4) is installed at the bottom of an inner cavity of the protective cylinder (3), a lens of the camera (4) is axially arranged along the protective cylinder (3) and is arranged towards the opening of the protective cylinder (3), the adsorption component (5) is installed on the protective cylinder (3) and is used for adsorbing a component, the pressing component (6) is installed on the assembly frame (2) and is used for pressing the component, the curing component (7) is installed on the assembly frame (2), and the electric pressure sensor (4) is used for controlling the electric pressure sensor (6) and the electric sensor (4) to be connected with the camera (4); Wherein the controller is configured to: When a magnetic circuit bonding demand instruction initiated by a user is received, controlling the adsorption assembly (5) to execute the adsorption instruction, controlling the mechanical arm (1) to execute a preset feeding moving path, and moving the protective cylinder (3) from a material area pre-divided by a workbench to a preset height above the jig; Acquiring image information fed back by a camera (4); carrying out jig accommodating groove profile recognition, T iron profile recognition, magnet profile recognition and upper clamping plate profile recognition based on image information to obtain an accommodating groove center position, T iron center position, magnet center position and upper clamping plate center position; Based on the central position of the accommodating groove, the central position of the T iron, the central position of the magnet and the central position of the upper clamping plate, controlling the mechanical arm (1) to execute a concentric alignment instruction; When a signal fed back after the mechanical arm (1) finishes the corresponding instruction is received, controlling the adsorption component (5) to execute a release instruction; When receiving a signal fed back after the adsorption component (5) finishes the corresponding instruction, controlling the pressing component (6) to execute the pressing instruction; and if the signal meeting the preset curing triggering condition is received, controlling the curing assembly (7) to execute a curing instruction until the curing time reaches the preset time, controlling the curing assembly (7) to be closed, and controlling the pressing assembly (6) to reset.
  3. 3. The method for bonding and aligning the magnetic circuit of the automobile loudspeaker based on machine vision according to claim 2, wherein the adsorption component (5) comprises a vacuum pump (51) and two suction blocks (52), the two suction blocks (52) are symmetrically and fixedly connected to the opening end part of the protective cylinder (3), the length directions of the two suction blocks (52) are axially arranged along the protective cylinder (3), the two suction blocks (52) are arc-shaped and concentric with the protective cylinder (3), the suction blocks (52) are provided with air channels, the lower surface of the suction blocks (52) is provided with a plurality of adsorption holes communicated with the air channels, and the vacuum pump (51) is arranged on a workbench and is connected with the air channels of the suction blocks (52) through hoses.
  4. 4. The machine vision-based automobile loudspeaker magnetic circuit bonding alignment method according to claim 3, wherein the pressing assembly (6) comprises an air cylinder (61) and two pressing rods (62), the air cylinder (61) is fixedly connected to the assembly frame (2), an output shaft of the air cylinder (61) is fixedly connected with a fixed block (63), the two pressing rods (62) are respectively and fixedly connected to two ends of the fixed block (63) and symmetrically located on the outer side of the protective cylinder (3), the length directions of the two pressing rods (62) are axially arranged along the protective cylinder (3), the two pressing rods (62) are arranged in a position crossing mode with the two suction blocks (52), the pressing rods (62) are fixedly connected with arc-shaped pressing plates (64), and the lower surface of each pressing plate (64) is higher than the lower surface of each suction block (52), and each pressing plate (64) is used for applying acting force to the upper surface of a component.
  5. 5. The method for bonding and aligning magnetic circuits of automotive speakers based on machine vision according to claim 3, wherein the curing assembly (7) comprises a support (61) and a UV light source (62), the upper end of the support (61) is arranged on the assembly frame (2), the support (61) extends axially along the protective cylinder (3), the UV light source (62) is mounted at the end, away from the assembly frame (2), of the support (61), and the UV light source (62) is radially arranged towards the protective cylinder (3).
  6. 6. The machine vision-based automobile loudspeaker magnetic circuit bonding alignment method according to claim 5, wherein the number of the brackets (61) is several, one end, close to the assembly frame (2), of each bracket (61) is fixedly connected with a rotating ring (63) together, each rotating ring (63) is sleeved outside the corresponding protective cylinder (3) and is coaxial with the corresponding protective cylinder (3), the assembly frame (2) is provided with a motor (64), an output shaft of the motor (64) is coaxially fixed with a gear (65), a tooth structure meshed with the gear (65) is formed in the inner side of each rotating ring (63), and the motor (64) is electrically connected with the controller.
  7. 7. The machine vision-based automobile loudspeaker magnetic circuit bonding alignment method according to claim 4, wherein two blocking covers (8) are respectively connected to the inner wall of the protective cylinder (3) on two sides of the camera (4) in a rotating mode, when the two blocking covers (8) are spliced, the two blocking covers are covered outside the camera (4), the pressing rod (62) is provided with a linkage assembly, and the linkage assembly is used for moving by the pressing rod (62) and driving the two blocking covers (8) to be spliced.
  8. 8. The method for bonding and aligning the magnetic circuit of the automobile loudspeaker based on machine vision according to claim 7, wherein the linkage assembly comprises a linkage rod (9), one end of the linkage rod (9) is fixedly connected with a pressing rod (62), the other end of the linkage rod extends into the protective cylinder (3) and is in contact with the blocking cover (8), the protective cylinder (3) is axially provided with a slideway (10) for the sliding and penetrating of the linkage rod (9), the blocking cover (8) is of a bucket-shaped structure and is provided with an upper cambered surface and a lower cambered surface, the upper cambered surface faces obliquely upwards and contacts with the end part of the linkage rod (9), the lower cambered surface faces obliquely downwards, when the two pressing plates (64) are pressed down in place, the two blocking covers (8) are mutually contacted and spliced, a rotating point between the blocking cover (8) and the inner wall of the protective cylinder (3) is provided with a torsion spring serving as a reset, one end of one blocking cover (8) deviating from the rotating point is provided with a pressure sensor (81), and the pressure sensor (81) is electrically connected with a controller; Wherein the controller is configured to: When feedback received from the air cylinder (61) indicates that the pressing plate (64) is pressed down in place, and feedback synchronously received from the pressure sensor (81) indicates that the two barrier covers (8) are spliced, the curing triggering condition is considered to be met, and the curing assembly (7) is controlled to execute a curing instruction.
  9. 9. The machine vision-based automotive speaker magnetic circuit bonding alignment method of claim 5, wherein the UV light source (62) is a linear light source.

Description

Machine vision-based automobile loudspeaker magnetic circuit bonding alignment method Technical Field The application relates to the technical field of loudspeaker assembly, in particular to a machine vision-based automobile loudspeaker magnetic circuit bonding alignment method. Background The loudspeaker is used as an electroacoustic transducer for converting electric signals into sound, and the core driving unit of the loudspeaker is a vibration system and a magnetic circuit system. The performance of the magnetic circuit system directly determines the efficiency, distortion and acoustic quality of the loudspeaker. The typical magnetic circuit system is formed by stacking and bonding three key components, namely T iron (also called a magnetic conduction lower plate), a permanent magnet (also called a magnet) and an upper clamping plate (also called a washer), in sequence from bottom to top along the axial direction. The T-shaped iron is used as a magnetic circuit foundation, a core column is arranged in the center of the T-shaped iron, the permanent magnet is usually annular and coaxially sleeved on the outer side of the T-shaped iron core column, and the upper clamping plate is also of an annular structure with a central hole and is positioned above the magnet. The three are fixed through structural adhesive to form a rigid whole. At present, the assembly of the magnetic circuit system generally adopts the process that T iron is manually placed in a fixture in sequence on a production line, an adhesive is coated on the T iron, then a magnet is placed, the magnet is glued again, an upper clamping plate is placed at last, the upper clamping plate is pressed by a manual pressing machine, and finally the T iron is sent to a solidification treatment. In the whole process, the relative positions (especially the vital concentricity) among the parts are greatly dependent on the positioning precision of the mechanical clamp and the visual alignment and adjustment of operators, and the performance consistency of the final product is easily affected, so the application provides a new technical scheme. Disclosure of Invention In order to improve the production consistency of products, the application provides an automobile loudspeaker magnetic circuit bonding alignment method based on machine vision. The application provides a machine vision-based magnetic circuit bonding alignment method for an automobile loudspeaker, which adopts the following technical scheme: A machine vision-based automobile loudspeaker magnetic circuit bonding alignment method comprises the following steps: Step one, setting a structural foundation, which comprises the following steps: based on a workbench provided with a controller; a jig is placed on the workbench, and a containing groove for placing the bottom of the T iron is formed in the top of the jig; The workbench is provided with a visual alignment mechanism so as to control the visual alignment mechanism by a controller; step two, bonding the alignment logic, which comprises configuring the controller to: controlling a visual alignment mechanism to align the T iron into the jig; When a T iron upper surface dispensing finishing signal triggered by an operator is received, controlling a visual alignment mechanism to align a magnet on the T iron, and performing lamination and solidification treatment on the magnet; When receiving the magnet upper surface dispensing finishing signal triggered by an operator, controlling the visual alignment mechanism to align the upper clamping plate on the magnet, and performing lamination and solidification treatment on the upper clamping plate. Optionally, the vision alignment mechanism includes arm, assembly jig, a protection section of thick bamboo, camera, adsorption component, pressfitting subassembly and solidification subassembly, arm base fixed connection is in the workstation, assembly jig fixed mounting is in the arm end, a protection section of thick bamboo fixed connection is in the assembly jig one end that deviates from the arm, a protection section of thick bamboo is hollow cylindric and deviates from the one end opening of assembly jig, the camera is installed in a protection section of thick bamboo inner chamber bottom, the camera's camera is along a protection section of thick bamboo axial and towards a protection section of thick bamboo opening setting, adsorption component installs in a protection section of thick bamboo for adsorbing the part, pressfitting subassembly installs in the assembly jig for pressfitting the part, solidification subassembly installs in the assembly jig for solidifying glue, the controller electricity is connected in arm, camera, adsorption component, pressfitting subassembly and solidification subassembly; Wherein the controller is configured to: when a magnetic circuit bonding demand instruction initiated by a user is received, controlling the adsorption assembly to execute the adsorption instruction, co