CN114193121A

CN114193121A - Electromagnetic interference prevention press mounting system and control method

Info

Publication number: CN114193121A
Application number: CN202210002476.3A
Authority: CN
Inventors: 李圣华
Original assignee: Individual
Current assignee: Anhui Jdi New Energy Technology Co ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-03-18
Anticipated expiration: 2042-01-04
Also published as: CN114193121B

Abstract

The invention relates to an electromagnetic interference prevention press-mounting system which comprises a base, two conveying devices, an adsorption device, a moving device, a fixing device and a control system, wherein the two conveying devices are arranged on the base; the two conveying devices are symmetrically arranged above the base and comprise mounting plates, first conveying belts, second conveying belts and position sensors; the fixing device is arranged between the two conveying devices and matched with the circuit board; the moving device comprises an X-axis moving structure, a Y-axis moving structure and a Z-axis moving structure; the adsorption device comprises a first negative pressure device, an adsorption platform, a plurality of first adsorption holes, a plurality of first limiting grooves and a plurality of infrared sensors; the control system is connected with the conveying device, the adsorption device, the moving device and the fixing device. The technical problem of how to improve the press mounting efficiency of the shielding case is solved by arranging the moving device and the adsorption device.

Description

Electromagnetic interference prevention press mounting system and control method

Technical Field

The invention relates to the field of press mounting systems, in particular to an electromagnetic interference prevention press mounting system and a control method.

Background

A shield is a means for shielding electronic signals. The function is to shield the influence of external electromagnetic waves on internal circuits and the outward radiation of the internally generated electromagnetic waves. The shield is generally mounted by first fixing the shield frame or the shield clip to the circuit board and then manually pressing the corresponding shield to the shield frame or the shield clip. The height of the shield is generally higher than the tallest components on the circuit board.

In the prior art, the shield cover is generally installed in a pressing mode manually, the labor intensity is high, the efficiency is low, the manual pressing force cannot be controlled, and the circuit board is easy to damage. Therefore, an emi shielding press-fitting system is needed.

Disclosure of Invention

The invention aims to solve the technical problem of how to improve the press mounting efficiency of a shielding case, and provides an electromagnetic interference prevention press mounting system and a control method.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an electromagnetic interference prevention press-mounting system comprises a base, two conveying devices, an adsorption device, a moving device, a fixing device, a control system and a display; the two conveying devices are symmetrically arranged above the base and comprise mounting plates, first conveying belts, second conveying belts and position sensors; the two mounting plates are arranged above the base in parallel; the first conveying belts are respectively arranged on the inner sides of the mounting plates, at least two first conveying rollers are arranged in the first conveying belts, and the first conveying rollers are connected with the bearings of the mounting plates; the second conveying belt is arranged on the inner sides of the two mounting plates and matched with the first conveying belt, at least two second conveying rollers are arranged in the second conveying belt, and the second conveying rollers are connected with the mounting plates; the fixing device is arranged between the two conveying devices and matched with the circuit board; the moving device comprises an X-axis moving structure, a Y-axis moving structure and a Z-axis moving structure; the X-axis moving structure is arranged above the conveying device and comprises a first moving platform; the Y-axis moving structure is arranged on the first moving table and comprises a second moving table; the Z-axis moving structure comprises a lifting cylinder, the lifting cylinder is arranged on the second moving platform, and the lifting cylinder is positioned above the circuit board; the adsorption device comprises a first negative pressure device, an adsorption platform, a plurality of first adsorption holes, a plurality of first limiting grooves and a plurality of infrared sensors; the adsorption platform is transversely arranged below the lifting cylinder, is connected with the telescopic end of the lifting cylinder and is matched with the circuit board; the first limiting groove is a groove, is arranged on the bottom surface of the adsorption platform and is respectively matched with the shapes of the shielding covers, and a first detection layer is arranged on the inner side surface of the first limiting groove and is an elastic rubber layer; the first adsorption holes are respectively arranged on the top surfaces of the first limiting grooves; the infrared sensors are respectively arranged on the top surfaces of the inner parts of the first limiting grooves; the first negative pressure device is communicated with the first adsorption holes; the control system is connected with the conveying device, the adsorption device, the moving device, the fixing device and the display. The X-axis moving structure and the Y-axis moving structure are moving structures driven by a lead screw. If the circuit board needs to press fit a plurality of shielding cases, all the shielding cases can be adsorbed into the first limiting groove and pressed fit at the same time without reciprocating for many times, so that the working efficiency is improved. The second conveyer belt is matched with the first conveyer belt to convey the circuit board. The fixing device is matched with the circuit board to fix the circuit board. The adsorption platform is matched with the circuit board to realize the press mounting of the shielding case.

The adsorption table is controlled by the moving device to adsorb the shielding cover to be pressed on the top surface of the circuit board to the corresponding first limiting groove through negative pressure at the feeding position of the external shielding cover. Then the circuit board is placed on the two first conveying belts, the first conveying belts and the second conveying belts are started, when the circuit board is conveyed to the lower portion of the adsorption platform, the circuit board is sensed by the position sensor, then the fixing device is controlled to fix the circuit board, then the adsorption platform descends through the lifting cylinder, the shielding cover is pressed on the shielding frame, then the first negative pressure device is stopped, the shielding cover is separated from the first adsorption holes, then the adsorption platform ascends through the lifting cylinder, and then the first conveying belts and the second conveying belts are controlled to output the circuit board. The adjacent first conveying roller and the second conveying roller are used for supporting the circuit board. Due to insufficient machining precision of the shielding frame or the shielding cover, the pressing fit is not tight and the shielding frame or the shielding cover is easy to fall off. Set up first detection layer for whether there is the not tight shield cover of pressure equipment, prevent that the shield cover from droing in follow-up process, if the pressure equipment is not tight, when the adsorption platform rises, the shield cover can rise under the frictional force effect on rubber layer, and infrared sensor can sense the position change of shield cover, marks the not tight shield cover of pressure equipment and circuit board with this, and sends warning information through the display, lets the staff carry out artifical pressure equipment to relevant circuit board. By varying the elasticity of the first detection layer, the detection criterion can be adjusted. An infrared sensor is provided for alignment at the time of adsorption.

Further, the adsorption device comprises a fixing plate, a first side plate, a second side plate, a turnover motor, a second negative pressure device, a plurality of second adsorption holes, a plurality of second limiting grooves and a turnover shaft; the fixed plate is fixed at the telescopic end of the lifting cylinder; the first side plate is fixed at the lower part of the fixing plate, is positioned at one side of the adsorption platform and is positioned between the two conveying devices; the second side plate is arranged below the fixed plate, is positioned on two sides of the adsorption table, is arranged opposite to the first side plate, and is connected with a rotating shaft of the fixed plate at the upper part; the overturning motor is fixed on the outer side face of the first side plate, a rotating shaft of the overturning motor penetrates through the first side plate and is fixed with the center of the side face of the adsorption platform, and the rotating shaft of the overturning motor is arranged along the conveying direction of the conveying device; the overturning shaft is rod-shaped, is fixed on the side surface of the adsorption platform, and the axis of the overturning shaft is superposed with the rotating axis of the overturning motor and matched with the overturning groove; the second limiting groove is arranged on the top surface of the adsorption platform and is matched with the shapes of the shielding covers respectively, and a second detection layer is arranged on the inner side surface of the second limiting groove and is an elastic rubber layer; the second adsorption holes are respectively arranged on the inner bottom surfaces of the second limiting grooves; the plurality of infrared sensors are respectively arranged on the bottom surfaces inside the plurality of second limiting grooves; the second negative pressure device is communicated with the second adsorption holes. The turnover shaft is matched with the turnover groove and can be separated from the turnover groove, and the turnover shaft can rotate in the turnover groove.

For circuit boards with components mounted on both sides, it may be the case that a press-shaped shield is required on both sides of the circuit board. When the adsorption platform presses the shielding cover onto the circuit board, the first negative pressure device is not stopped, the control fixing device is released, then the adsorption platform is controlled to drive the circuit board to ascend, then the adsorption platform is controlled to rotate 180 degrees by turning over the motor, then the adsorption platform is controlled to descend, the circuit board falls onto the conveyor belt, the bottom surface of the circuit board faces upwards, the control fixing device fixes the circuit board, then the first negative pressure device is stopped, then the adsorption platform is controlled to descend, the adsorption platform is separated from the circuit board, then the second side plate is rotated by rotating the motor, the second side plate is separated from the adsorption platform, then the adsorption platform moves along the conveying direction of the conveying device through the moving device, when the adsorption platform moves to the outer side of the circuit board, the adsorption platform is controlled to ascend, then the rotating motor is controlled to rotate, and the second side plate is connected with the adsorption platform. And then the adsorption platform is controlled to adsorb the shielding cover required by the bottom surface of the circuit board into the second limiting groove and press-fit the shielding cover onto the bottom surface of the circuit board.

Further, the adsorption device comprises a first communicating cavity, a second communicating cavity, a first sealing plate, a second sealing plate, a first cylinder and a second cylinder; the first communicating cavity is transversely arranged in the adsorption table; a first air cylinder is arranged in the first communication cavity and arranged along the conveying direction of the conveying device; the first sealing plate is arranged in the first communicating cavity, is tightly matched with the first communicating cavity and is fixed with the telescopic end of the first air cylinder; the upper ports of the first adsorption holes are arranged on the inner bottom surface of the first communication cavity at intervals along the axial direction of the first cylinder and are tightly matched with the first sealing plate; the first negative pressure device is communicated with one side of the first communication cavity close to the first cylinder through a hose; the second communicating cavity is transversely arranged in the adsorption platform and is positioned above the first communicating cavity; a second cylinder is arranged in the second communicating cavity and arranged along the conveying direction of the conveying device; the second sealing plate is arranged in the second communicating cavity, is tightly matched with the second communicating cavity and is fixed with the telescopic end of the second cylinder; the lower ports of the second adsorption holes are arranged on the inner top surface of the second communication cavity at intervals along the axial direction of the second cylinder and are tightly matched with the second sealing plate; the second negative pressure device is communicated with one side of the second communication cavity close to the second cylinder through a hose. The first sealing plate is tightly matched with the first communication cavity, so that air leakage is prevented. The upper ports of the first adsorption holes are tightly matched with the first sealing plate and are arranged according to the adsorption sequence of the first limiting grooves.

When adsorbing a plurality of shield covers to the spacing inslot, need adsorb according to the order. And controlling the extension of the first cylinder to enable the first sealing plate to move, and enabling the first adsorption holes to be communicated with the first negative pressure device in sequence to realize the sequential adsorption of the shielding cover. The adsorption process of the second adsorption hole is the same.

Furthermore, the adsorption device comprises a first matching groove, a second matching groove, at least two first supporting blocks and at least two second supporting blocks; the direction of the first communication cavity facing the first side plate is an opening, and the opening is far away from the first cylinder; the first matching groove is arranged on the inner side surface of the first side plate and matched with the first sealing plate; the direction of the first side plate communicated with the cavity surface is an opening, and the opening is far away from the second cylinder; the second matching groove is arranged on the inner side face of the first side plate and matched with the second sealing plate, and the second matching groove and the first matching groove are centrosymmetric about the rotating axis of the turnover motor; the two first supporting blocks are made of rubber materials, are fixed on the bottom surface of the adsorption table and are matched with the circuit board; the two second supporting blocks are made of rubber materials, are fixed on the top surface of the adsorption table and are matched with the circuit board. The two first supporting blocks are matched with the circuit board, so that the shielding cover is just pressed on the shielding frame.

Because the adsorption platform can rotate, the adsorption platform can swing when being pressed and moved. And the extension of the first cylinder and the second cylinder is controlled, so that the first sealing plate and the second sealing plate enter the first matching groove and the second matching groove to realize fixation. Set up first supporting shoe and second supporting shoe for with first limiting plate and second limiting plate looks butt, limit the distance between adsorption platform and the circuit board, prevent to exert oneself too big to cause the destruction to the circuit board. The second matching groove and the first matching groove are symmetrical with the center of the rotation axis of the turnover motor and are used for fixing the sealing plate and the matching groove after the adsorption platform rotates. The first supporting block and the second supporting block are arranged, and can be adjusted according to different heights of the shielding case.

Furthermore, the adsorption device comprises an upper positioning plate, a lower positioning plate, a first anti-rotation cylinder, a second anti-rotation cylinder, a plurality of anti-rotation rods, a moving plate and a driving motor; a first sliding groove is transversely arranged on the inner side surface of the first side plate and is positioned on one side of the rotation axis of the adsorption platform; the upper positioning plate is arranged in the first sliding groove, is connected with the upper surface of the adsorption platform and is matched with the rotation of the adsorption platform, and a rubber layer is arranged on the lower surface of the upper positioning plate; the first anti-rotation cylinder is arranged in the first sliding chute, and the telescopic end of the first anti-rotation cylinder is fixed with the upper positioning plate; a second sliding chute is transversely arranged on the inner side surface of the first side plate, is positioned on one side of the rotation axis of the adsorption platform and is positioned below the first sliding chute; the lower positioning plate is arranged in the second sliding groove, is connected with the lower surface of the adsorption platform and is matched with the rotation of the adsorption platform, and a rubber layer is arranged on the upper surface of the lower positioning plate; the second anti-rotation cylinder is arranged in the second sliding chute, and the telescopic end of the second anti-rotation cylinder is fixed with the upper positioning plate; the inner side surface of the first side plate is provided with a plurality of anti-rotation screw holes; the moving plate is arranged on the outer side of the second side plate; one end of each anti-rotation rod is connected to the inner side surface of the movable plate through a bearing, the surface of each anti-rotation rod is provided with an external thread and penetrates through the second side plate to be matched with the anti-rotation screw holes, the anti-rotation rods are parallel to each other and are arranged above the adsorption table, the anti-rotation rods are sleeved with chain wheels, and the chain wheels are sleeved with chains; the rotating shaft of the driving motor is connected with the anti-rotation rod. The upper positioning plate and the lower positioning plate are matched with the adsorption table in a rotating mode, when the adsorption table is to rotate, the upper positioning plate and the lower positioning plate are controlled to retract into the sliding groove, then when the adsorption table is to rotate to a specified angle, the corresponding positioning plate is controlled to stretch out to be blocked, and then another positioning plate is controlled to clamp.

Set up locating plate and lower locating plate for block when adsorbing the platform and rotate, be 180 degrees with the rotation angle limit of upset motor, and can carry out the centre gripping to adsorbing the platform, prevent its rotation. When the second side plate is connected with the adsorption table, the driving motor is controlled to rotate, the anti-rotation rods are made to rotate, the movable plate is made to move under the action of the external threads, the anti-rotation rods are made to move towards the anti-rotation holes and are fixed with the anti-rotation holes, and the stability of connection of the second side plate and the adsorption table is enhanced.

Further, the fixing device comprises a first limiting plate, a second limiting plate, a protective layer, an adhesive layer, a first limiting cylinder, a second limiting cylinder and two supporting grooves; the first limiting plate is vertically arranged between the two mounting plates, is arranged on one side of the circuit board along the conveying direction of the conveying device, the lower part of the first limiting plate is connected with the rotating shaft of the base, the upper part of the first limiting plate is matched with the adsorption platform, and the rotating axis of the first limiting plate is vertical to the conveying direction of the conveying device; the first limiting cylinder is arranged on the side of the first limiting plate, and two ends of the first limiting cylinder are hinged with the first limiting plate and the base respectively; the protective layer is a rubber layer and is arranged on the side surface, facing the circuit board, of the first limiting plate; the adhesive layer is arranged on the protective layer; the second limiting plate is vertically arranged between the two mounting plates, is arranged on the other side of the circuit board, is opposite to the first limiting plate, is connected with the rotating shaft of the base at the lower part, is matched with the adsorption platform at the upper part, and has the rotating axis vertical to the conveying direction of the conveying device; the second limiting cylinder is arranged on the side of the second limiting plate, and two ends of the second limiting cylinder are hinged with the second limiting plate and the base respectively; the two supporting grooves are respectively arranged on the upper parts of the first limiting plate and the second limiting plate and matched with the adsorption device. The stickness layer is the double faced adhesive tape, conveniently changes. The supporting groove corresponds to the supporting block, and the supporting block is prevented from moving.

There will be some error in controlling the circuit board to stop by the position sensor. Set up first limiting plate for block the circuit board, when circuit board and stickness layer meet, can glue on its surface, reduce the displacement that produces by the collision. And a second limiting plate is arranged and matched with the first limiting plate to limit the circuit board. Before and after the circuit board overturns, the circuit board can be limited through the first limiting plate and the second limiting plate. And a first limit cylinder and a second limit cylinder are arranged and are used for adapting to the moving route of the adsorption table.

Furthermore, the fixing device comprises two pressing plates and two fixing cylinders; a fixing groove is transversely arranged on the inner side surface of the mounting plate, the fixing groove is arranged on the side of the circuit board, and the length of the fixing groove is matched with that of the circuit board; the two pressing plates are respectively arranged in the fixed groove, are matched with the circuit board and are matched with the first conveying roller and the second conveying roller, the inner side surfaces of the pressing plates are inclined surfaces which incline downwards from the inner side to the outer side, and rubber layers are arranged on the inclined surfaces and are matched with the circuit board; two fixed cylinders are respectively arranged on the outer side of the mounting plate, the telescopic ends of the fixed cylinders penetrate through the mounting plate to be connected with the pressing plate, and the axes of the fixed cylinders are transversely arranged.

After first limiting plate and second limiting plate carry on spacingly to the circuit board, the extension of the fixed cylinder of control makes two pressure strips remove, compresses tightly the circuit board through the slope face, fixes the circuit board with first conveying roller and second conveying roller cooperation. The pinch plate is located above the adjacent first and second conveyor rollers.

Furthermore, the fixing device comprises a plurality of first supporting cylinders, a plurality of second supporting cylinders, a first supporting platform, a second supporting platform and a plurality of supporting rods; the plurality of first supporting cylinders are vertically arranged between the two conveying devices; the first supporting table is fixed at the telescopic ends of the first supporting cylinders, is positioned below the circuit board and is matched with the circuit board, and a rubber layer is arranged on the upper surface of the first supporting table; the second support table is arranged below the first support table; the plurality of second supporting cylinders are vertically arranged below the second supporting platform and are fixed with the second supporting platform; the supporting rods are fixed on the second supporting platform, the supporting rods upwards penetrate through the second supporting platform, and the upper ends of the supporting rods are provided with rubber layers and matched with the circuit board. The upper ends of the support rods are matched with the circuit board, and the support rods which are correspondingly arranged need to be used for supporting the positions without elements due to different circuits on the circuit board.

The circuit board has elasticity, and in the pressure equipment process, its middle part is recessed easily, influences the pressure equipment effect. Before the circuit board is turned over, the second supporting cylinder is controlled to extend to make the second supporting platform ascend and the supporting rod ascend to be connected with the part of the circuit board without elements. And after the circuit board is turned over, the first supporting cylinder is controlled to extend, so that the first supporting table is lifted and connected with the pressed shielding cover.

A control method of an electromagnetic interference prevention press-fitting system comprises the following steps: when the adsorption platform presses the shielding cover in the second limiting groove to the bottom surface of the circuit board, and after the shielding cover rises, the following steps are realized: a1: controlling the upper positioning plate, the lower positioning plate, the first sealing plate and the second sealing plate to contract, then controlling the adsorption platform to rotate 180 degrees through the overturning motor, then controlling the upper positioning plate, the lower positioning plate, the first sealing plate and the second sealing plate to extend out, and then controlling the adsorption platform to descend to press the shielding cover; a2: and controlling the adsorption platform to ascend, and then outputting the circuit board. When the circuit board is placed, the height of the shielding cover on the top surface of the circuit board is not higher than that of the shielding cover on the bottom surface, so that the adsorption table can be pressed onto the shielding cover.

After the press mounting process, the shielding cover on the bottom surface of the circuit board may loosen under the action of the second detection layer, and the bottom surface and the top surface of the circuit board are generally different, so that the arrangement of the first limiting groove and the second limiting groove is different, the adsorption table can be controlled to rotate 180 degrees and then compress the shielding cover, and the next press mounting process can be continued after the adsorption table is turned over.

A control method of an electromagnetic interference prevention press-fitting system comprises the following steps: after the press mounting process is finished, if the infrared sensor senses that the shielding cover is positioned in the limiting groove, the following steps are carried out: b1, controlling the adsorption platform to move above the vacant platform through the moving device; and B2, controlling the upper positioning plate, the lower positioning plate, the first sealing plate and the second sealing plate to contract, controlling the adsorption platform to rotate for 90 degrees by the aid of a turnover motor, controlling fan blades of the first negative pressure device and the second negative pressure device to rotate reversely, blowing the shielding cover onto the vacant platform by air flow, controlling the first negative pressure device and the second negative pressure device to stop, controlling the adsorption platform to rotate by the aid of the turnover motor, enabling the first limiting groove to face downwards, controlling the upper positioning plate, the lower positioning plate, the first sealing plate and the second sealing plate to extend, and then carrying out the next press mounting process.

The shielding cover remained in the limiting groove is blown out through the blown air flow.

The invention has the beneficial effects that:

1. a turnover motor is arranged, so that the circuit board can be turned over;

2. the second limiting groove is arranged, and the shielding cover can be pressed on the bottom surface of the circuit board;

3. set up limiting plate, pressure strip, can fix the circuit board.

Drawings

FIG. 1 is a schematic cross-sectional view of a front view of the EMI shielding press-fitting system;

FIG. 2 is a schematic top view of the EMI shielding press-fitting system;

FIG. 3 is a schematic cross-sectional view of an elevation view of an adsorption stage of the EMI shielding press-fitting system;

fig. 4 is a schematic cross-sectional view of a front view of the first limiting plate of the electromagnetic interference shielding press-fitting system;

description of reference numerals:

1. a base;

2. an X-axis moving structure;

3. a Y-axis moving structure; 31. a second mobile station;

4. a lifting cylinder;

5. a fixing plate; 51. a first side plate; 52. a second side plate; 521. a drive motor; 522. an anti-rotation rod; 523. moving the plate; 53. a second anti-rotation cylinder; 54. a lower positioning plate; 55. a first anti-rotation cylinder; 56. an upper positioning plate;

6. an adsorption stage; 61. turning over a motor; 62. a first cylinder; 63. a first sealing plate; 631. a first mating groove; 64. a first detection layer; 65. a first support block; 66. a second cylinder; 67. a second sealing plate; 671. a second mating groove; 68. a second detection layer; 69. a second support block;

7. a first limit plate; 71. a second limiting plate; 72. a protective layer; 73. an adhesive layer;

8. a first support cylinder; 81. a first support table; 82. a second support cylinder; 83. a second support table; 84. a support bar; 85. a compression plate; 86. fixing the air cylinder;

9. mounting a plate; 91. a first conveyor belt; 92. a second conveyor belt.

Detailed Description

The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention.

Example 1:

as shown in fig. 1 and 2, an electromagnetic interference prevention press-fitting system includes a base 1, two conveying devices, an adsorption device, a moving device, a fixing device, a control system, and a display; the two conveying devices are symmetrically arranged above the base 1 and comprise a mounting plate 9, a first conveying belt 91, a second conveying belt 92 and a position sensor; the two mounting plates 9 are arranged above the base 1 in parallel; the first conveying belts 91 are respectively arranged on the inner sides of the mounting plates 9, two first conveying rollers are arranged in the first conveying belts 91, and the first conveying rollers are connected with the mounting plates 9 through bearings; the second conveying belt 92 is arranged on the inner sides of the two mounting plates 9 and matched with the first conveying belt 91, and two second conveying rollers are arranged in the second conveying belt 92 and connected with the mounting plates 9; the fixing device is arranged between the two conveying devices and matched with the circuit board; the moving device comprises an X-axis moving structure 2, a Y-axis moving structure 3 and a Z-axis moving structure; the X-axis moving structure 2 is arranged above the conveying device, and the X-axis moving structure 2 comprises a first moving table; the Y-axis moving structure 3 is arranged on the first moving table, and the Y-axis moving structure 3 comprises a second moving table 31; the Z-axis moving structure comprises a lifting cylinder 4, the lifting cylinder 4 is arranged on the second moving platform 31, and the lifting cylinder 4 is positioned above the circuit board; the adsorption device comprises a first negative pressure device, an adsorption platform 6, a plurality of first adsorption holes, a plurality of first limiting grooves and a plurality of infrared sensors; the adsorption platform 6 is transversely arranged below the lifting cylinder 4, is connected with the telescopic end of the lifting cylinder 4 and is matched with the circuit board; the first limiting groove is a groove, is arranged on the bottom surface of the adsorption platform 6 and is respectively matched with the shapes of the shielding covers, a first detection layer 64 is arranged on the inner side surface of the first limiting groove, and the first detection layer 64 is an elastic rubber layer; the first adsorption holes are respectively arranged on the top surfaces of the first limiting grooves; the infrared sensors are respectively arranged on the top surfaces of the inner parts of the first limiting grooves; the first negative pressure device is communicated with the first adsorption holes; the control system is connected with the conveying device, the adsorption device, the moving device, the fixing device and the display. The X-axis moving structure 2 and the Y-axis moving structure 3 are moving structures driven by lead screws. If the circuit board needs to press fit a plurality of shielding cases, all the shielding cases can be adsorbed into the first limiting groove and pressed fit at the same time without reciprocating for many times, so that the working efficiency is improved. The second conveyor belt 92 is engaged with the first conveyor belt 91 to convey the circuit board. The fixing device is matched with the circuit board to fix the circuit board. The adsorption platform 6 is matched with the circuit board to realize the press mounting of the shielding case. The negative pressure device generates negative pressure through the fan blades.

The adsorption table 6 is controlled by the moving device to adsorb the shielding cover to be pressed on the top surface of the circuit board to the corresponding first limiting groove through negative pressure at the feeding position of the external shielding cover. Then the circuit board is placed on the two first conveyor belts 91, the first conveyor belts 91 and the second conveyor belts 92 are started, when the circuit board is conveyed to the position below the adsorption platform 6, the circuit board is sensed by the position sensor, then the fixing device is controlled to fix the circuit board, then the adsorption platform 6 descends through the lifting cylinder 4, the shielding cover is pressed on the shielding frame, then the first negative pressure device is stopped, the shielding cover is separated from the first adsorption holes, then the adsorption platform 6 is controlled to ascend through the lifting cylinder 4, and then the first conveyor belts 91 and the second conveyor belts 92 are controlled to output the circuit board. The adjacent first conveying roller and the second conveying roller are used for supporting the circuit board. Due to insufficient machining precision of the shielding frame or the shielding cover, the pressing fit is not tight and the shielding frame or the shielding cover is easy to fall off. Set up first detection layer 64 for whether there is the not tight shield cover of pressure equipment, prevent that the shield cover from droing in follow-up process, if the pressure equipment is not tight, when adsorbing platform 6 and rising, the shield cover can rise under the frictional force effect on rubber layer, and infrared sensor can sense the position change of shield cover, carries out the mark to the not tight shield cover of pressure equipment and circuit board to send warning information through the display, let the staff carry out artifical pressure equipment to relevant circuit board. The detection criteria can be adjusted by changing the elasticity of the first detection layer 64. An infrared sensor is provided for alignment at the time of adsorption.

As shown in fig. 3, the suction device includes a fixing plate 5, a first side plate 51, a second side plate 52, a turning motor 61, a second negative pressure device, a plurality of second suction holes, a plurality of second limiting grooves, and a turning shaft; the fixed plate 5 is fixed at the telescopic end of the lifting cylinder 4; the first side plate 51 is fixed at the lower part of the fixing plate 5, is positioned at one side of the adsorption platform 6 and is positioned between the two conveying devices; the second side plate 52 is arranged below the fixed plate 5, is positioned at two sides of the adsorption platform 6, is arranged opposite to the first side plate 51, the upper part of the second side plate is connected with a rotating shaft of the fixed plate 5, the rotating shaft of the second side plate 52 is connected with a rotating motor, and the inner side surface of the second side plate 52 is provided with an overturning groove; the overturning motor 61 is fixed on the outer side surface of the first side plate 51, a rotating shaft of the overturning motor 61 penetrates through the first side plate 51 and is fixed with the center of the side surface of the adsorption platform 6, and the rotating shaft of the overturning motor 61 is arranged along the conveying direction of the conveying device; the overturning shaft is rod-shaped and is fixed on the side surface of the adsorption platform 6, and the axis of the overturning shaft is superposed with the rotating axis of the overturning motor 61 and matched with the overturning groove; the second limiting groove is arranged on the top surface of the adsorption platform 6 and is matched with the shapes of the shielding covers respectively, a second detection layer 68 is arranged on the inner side surface of the second limiting groove, and the second detection layer 68 is an elastic rubber layer; the second adsorption holes are respectively arranged on the inner bottom surfaces of the second limiting grooves; the plurality of infrared sensors are respectively arranged on the bottom surfaces inside the plurality of second limiting grooves; the second negative pressure device is communicated with the second adsorption holes. The turnover shaft is matched with the turnover groove and can be separated from the turnover groove, and the turnover shaft can rotate in the turnover groove.

For circuit boards with components mounted on both sides, it may be the case that a press-shaped shield is required on both sides of the circuit board. When the adsorption platform 6 presses the shielding cover on the circuit board, the first negative pressure device is not stopped, the fixing device is controlled to be released, then the adsorption platform 6 is controlled to drive the circuit board to rise, then the adsorption platform 6 is controlled to rotate 180 degrees by the overturning motor 61, then the adsorption platform 6 is controlled to descend to enable the circuit board to fall on the conveyor belt, the bottom surface of the circuit board is upward, the fixing device is controlled to fix the circuit board, then the first negative pressure device is stopped, then the adsorption table 6 is controlled to descend to separate the adsorption table 6 from the circuit board, then the second side plate 52 is rotated by rotating the motor to separate the second side plate 52 from the adsorption table 6, then the adsorption table 6 is moved along the conveying direction of the conveying device by the moving device, when the adsorption stage 6 moves to the outside of the circuit board, the adsorption stage 6 is controlled to ascend, and then the rotation motor is controlled to rotate, so that the second side plate 52 is connected to the adsorption stage 6. And then the adsorption table 6 is controlled to adsorb the shielding cover required by the bottom surface of the circuit board into the second limiting groove and press-fit the shielding cover onto the bottom surface of the circuit board.

The adsorption device comprises a first communication cavity, a second communication cavity, a first sealing plate 63, a second sealing plate 67, a first air cylinder 62 and a second air cylinder 66; the first communicating cavity is transversely arranged in the adsorption platform 6; a first air cylinder 62 is arranged in the first communication cavity, and the first air cylinder 62 is arranged along the conveying direction of the conveying device; the first sealing plate 63 is arranged in the first communicating cavity, is tightly matched with the first communicating cavity and is fixed with the telescopic end of the first air cylinder 62; the upper ports of the first adsorption holes are arranged on the inner bottom surface of the first communication cavity at intervals along the axial direction of the first cylinder 62 and are tightly matched with the first sealing plate 63; the first negative pressure device is communicated with one side of the first communication cavity close to the first air cylinder 62 through a hose; the second communicating cavity is transversely arranged in the adsorption platform 6 and is positioned above the first communicating cavity; a second air cylinder 66 is arranged in the second communication cavity, and the second air cylinder 66 is arranged along the conveying direction of the conveying device; the second sealing plate 67 is arranged in the second communicating cavity, is tightly matched with the second communicating cavity and is fixed with the telescopic end of the second air cylinder 66; the lower ports of the second adsorption holes are arranged on the top surface of the interior of the second communication cavity at intervals along the axial direction of the second cylinder 66 and are tightly matched with the second sealing plate 67; the second negative pressure device is communicated with one side of the second communication cavity close to the second cylinder 66 through a hose. The first sealing plate 63 is tightly fitted with the first communicating cavity to prevent air leakage. The upper ports of the first adsorption holes are closely matched with the first sealing plate 63 and are arranged according to the adsorption sequence of the first limiting grooves.

When adsorbing a plurality of shield covers to the spacing inslot, need adsorb according to the order. The extension of the first cylinder 62 is controlled to move the first sealing plate 63, so that the first suction holes are sequentially communicated with the first negative pressure device, and the sequential suction of the shielding cover is realized. The adsorption process of the second adsorption hole is the same.

The adsorption device comprises a first matching groove 631, a second matching groove 671, two first supporting blocks 65 and two second supporting blocks 69; the direction of the first communicating cavity facing the first side plate 51 is an opening, and the opening is far away from the first cylinder 62; the first fitting groove 631 is disposed on the inner side surface of the first side plate 51, and is fitted with the first sealing plate 63; the direction of the second communicating cavity surface first side plate 51 is an opening, and the opening is far away from the second cylinder 66; the second matching groove 671 is arranged on the inner side surface of the first side plate 51 and is matched with the second sealing plate 67, and the second matching groove 671 and the first matching groove 631 are centrosymmetric with the rotation axis of the turnover motor 61; the two first supporting blocks 65 are made of rubber materials, are fixed on the bottom surface of the adsorption platform 6 and are matched with the circuit board; the two second supporting blocks 69 are made of rubber material and fixed on the top surface of the adsorption table 6 to be matched with the circuit board. The two first support blocks 65 cooperate with the circuit board to press the shield case just onto the shield frame.

Since the suction table 6 is rotatable, a swing occurs at the time of press-fitting and moving. The first cylinder 62 and the second cylinder 66 are controlled to extend, so that the first sealing plate 63 and the second sealing plate 67 enter the first matching groove 631 and the second matching groove 671, and fixation is achieved. The first supporting block 65 and the second supporting block 69 are arranged and used for being abutted to the first limiting plate 7 and the second limiting plate 71 to limit the distance between the adsorption table 6 and the circuit board and prevent the circuit board from being damaged by excessive force. The second fitting groove 671 and the first fitting groove 631 are centrosymmetric with respect to the rotation axis of the inverter motor 61, so that the sealing plate and the fitting groove can be fixed to each other after the adsorption stage 6 is rotated. The first supporting block 65 and the second supporting block 69 are provided to be adjusted according to the height of the shield case.

The adsorption device comprises an upper positioning plate 56, a lower positioning plate 54, a first anti-rotation air cylinder 55, a second anti-rotation air cylinder 53, a plurality of anti-rotation rods 522, a moving plate 523 and a driving motor 521; a first sliding groove is transversely arranged on the inner side surface of the first side plate 51 and is positioned on one side of the rotation axis of the adsorption platform 6; the upper positioning plate 56 is arranged in the first sliding chute, is connected with the upper surface of the adsorption platform 6 and is matched with the rotation of the adsorption platform 6, and a rubber layer is arranged on the lower surface of the upper positioning plate 56; the first anti-rotation cylinder 55 is arranged in the first chute, and the telescopic end of the first anti-rotation cylinder is fixed with the upper positioning plate 56; a second sliding groove is transversely arranged on the inner side surface of the first side plate 51, is positioned on one side of the rotation axis of the adsorption platform 6 and is positioned below the first sliding groove; the lower positioning plate 54 is arranged in the second sliding chute, is connected with the lower surface of the adsorption table 6 and is matched with the rotation of the adsorption table 6, and a rubber layer is arranged on the upper surface of the lower positioning plate 54; the second anti-rotation cylinder 53 is arranged in the second chute, and the telescopic end of the second anti-rotation cylinder is fixed with the upper positioning plate 56; the inner side surface of the first side plate 51 is provided with a plurality of anti-rotation screw holes; the moving plate 523 is disposed outside the second side plate 52; one end of each anti-rotation rod 522 is connected to the inner side surface of the movable plate 523 through a bearing, the surface of each anti-rotation rod is provided with an external thread and penetrates through the second side plate 52 to be matched with the anti-rotation screw holes, the anti-rotation rods 522 are parallel to each other and are arranged above the adsorption table 6, the anti-rotation rods 522 are sleeved with chain wheels, and the chain wheels are sleeved with chains; the rotation shaft of the driving motor 521 is connected to the rotation preventing lever 522. The upper positioning plate 56 and the lower positioning plate 54 are matched with the rotation of the adsorption table 6, when the adsorption table 6 is to rotate, the upper positioning plate 56 and the lower positioning plate 54 are controlled to retract into the sliding grooves, then when the adsorption table 6 is to rotate to a specified angle, the corresponding positioning plate is controlled to extend out to be blocked, and then another positioning plate is controlled to be clamped.

An upper positioning plate 56 and a lower positioning plate 54 are provided for blocking when the adsorption stage 6 rotates, limiting the rotation angle of the turnover motor 61 to 180 degrees, and capable of clamping the adsorption stage 6 to prevent it from rotating. When the second side plate 52 is connected to the adsorption stage 6, the driving motor 521 is controlled to rotate, so that the rotation preventing rods 522 rotate, and the moving plate 523 moves under the action of the external threads, so that the rotation preventing rods 522 move towards the rotation preventing holes and are fixed to the rotation preventing holes, thereby enhancing the connection stability of the second side plate 52 and the adsorption stage 6.

As shown in fig. 4, the fixing device includes a first limiting plate 7, a second limiting plate 71, a protective layer 72, an adhesive layer 73, a first limiting cylinder, a second limiting cylinder, and two supporting grooves; the first limiting plate 7 is vertically arranged between the two mounting plates 9 and arranged on one side of the circuit board along the conveying direction of the conveying device, the lower part of the first limiting plate is connected with the rotating shaft of the base 1, the upper part of the first limiting plate is matched with the adsorption platform 6, and the rotating axis of the first limiting plate is vertical to the conveying direction of the conveying device; the first limiting cylinder is arranged on the side of the first limiting plate 7, and two ends of the first limiting cylinder are hinged with the first limiting plate 7 and the base 1 respectively; the protective layer 72 is a rubber layer and is arranged on the side surface of the first limiting plate 7 facing the circuit board; the adhesive layer 73 is arranged on the protective layer 72; the second limiting plate 71 is vertically arranged between the two mounting plates 9, is arranged on the other side of the circuit board, is arranged opposite to the first limiting plate 7, is connected with the rotating shaft of the base 1 at the lower part, is matched with the adsorption platform 6 at the upper part, and has the rotating axis vertical to the conveying direction of the conveying device; the second limiting cylinder is arranged on the side of the second limiting plate 71, and two ends of the second limiting cylinder are respectively hinged with the second limiting plate 71 and the base 1; the two supporting grooves are respectively arranged at the upper parts of the first limiting plate 7 and the second limiting plate 71 and are matched with the adsorption device. The sticky layer 73 is double faced adhesive tape, and is convenient to replace. The supporting groove corresponds to the supporting block, and the supporting block is prevented from moving.

There will be some error in controlling the circuit board to stop by the position sensor. Set up first limiting plate 7 for block the circuit board, when circuit board meets with stickness layer 73, can glue on its surface, reduce the displacement by the collision production. The second limiting plate 71 is arranged to be matched with the first limiting plate 7 to limit the circuit board. Before and after the circuit board is turned over, the circuit board can be restrained by the first and

second restraint plates

7 and 71. A first limit cylinder and a second limit cylinder are arranged and are used for adapting to the moving route of the adsorption platform 6.

The fixing device comprises two pressing plates 85 and two fixing cylinders 86; a fixing groove is transversely arranged on the inner side surface of the mounting plate 9, the fixing groove is arranged on the side of the circuit board, and the length of the fixing groove is matched with that of the circuit board; the two pressing plates 85 are respectively arranged in the fixed grooves, are matched with the circuit board and are matched with the first conveying roller and the second conveying roller, the inner side surfaces of the pressing plates 85 are inclined surfaces which incline downwards from the inner side to the outer side, and rubber layers are arranged on the inclined surfaces and are matched with the circuit board; the two fixed cylinders 86 are respectively arranged outside the mounting plate 9, the telescopic ends of the fixed cylinders 86 penetrate through the mounting plate 9 to be connected with the pressing plate 85, and the axes of the fixed cylinders 86 are transversely arranged.

After the first limiting plate 7 and the second limiting plate 71 limit the circuit board, the fixing cylinder 86 is controlled to extend, so that the two pressing plates 85 move to press the circuit board through the inclined surface, and the circuit board is fixed by matching with the first conveying roller and the second conveying roller. The pinch plate 85 is above the adjacent first and second conveyor rollers.

The fixing device comprises a plurality of first supporting cylinders 8, a plurality of second supporting cylinders 82, a first supporting platform 81, a second supporting platform 83 and a plurality of supporting rods 84; the first supporting cylinders 8 are vertically arranged between the two conveying devices; the first supporting table 81 is fixed at the telescopic ends of the first supporting cylinders 8, is positioned below the circuit board and is matched with the circuit board, and a rubber layer is arranged on the upper surface of the first supporting table 81; the second support table 83 is disposed below the first support table 81; the plurality of second supporting cylinders 82 are vertically arranged below the second supporting platform 83 and fixed with the second supporting platform 83; the support rods 84 are fixed on the second support platform 83, the support rods 84 upwardly penetrate through the second support platform 83, and rubber layers are arranged at the upper ends of the support rods 84 and matched with the circuit board. The upper ends of the support bars 84 are engaged with the circuit board, and the support bars 84 are correspondingly arranged to support the positions without components due to different circuits on the circuit board.

The circuit board has elasticity, and in the pressure equipment process, its middle part is recessed easily, influences the pressure equipment effect. Before the circuit board is turned over, the second support cylinder 82 is controlled to extend, the second support base 83 is raised, and the support rod 84 is raised to contact a portion of the circuit board where no component is present. After the circuit board is turned over, the first supporting cylinder 8 is controlled to extend, so that the first supporting table 81 rises and is connected with the pressed shielding case.

The working process of the embodiment is as follows: the adsorption table 6 is controlled by the moving device to adsorb the shielding cover to be pressed on the top surface of the circuit board to the corresponding first limiting groove through negative pressure at the feeding position of the external shielding cover. Then place the circuit board on two first conveyer belts 91, start first conveyer belt 91 and second conveyer belt 92, when the circuit board carries adsorption stage 6 below, be sensed by the position inductor, then carry out the circuit board through first limiting plate 7 and second limiting plate 71 and carry on spacingly, then control fixed cylinder 86 extension makes two pressure strips 85 remove, compresses tightly the circuit board through the slope, fixes the circuit board with first conveying roller and second conveying roller cooperation. The second support cylinder 82 is controlled to extend, the second support base 83 is raised, and the support rod 84 is raised to contact a portion of the circuit board where no component is present. Then, the adsorption table 6 is lowered through the lifting cylinder 4, so that the shielding cover is pressed on the shielding frame. The control fixing device is released, then the adsorption platform 6 is controlled to drive the circuit board to ascend, then the adsorption platform 6 is controlled to rotate 180 degrees through the overturning motor 61, then the adsorption platform 6 is controlled to descend, the circuit board is made to fall onto the conveying belt, the bottom surface of the circuit board faces upwards, the control fixing device fixes the circuit board, then the first negative pressure device is stopped, then the adsorption platform 6 is controlled to descend, the adsorption platform 6 is made to be separated from the circuit board, then the second side plate 52 is made to rotate through the rotating motor, the second side plate 52 is made to be separated from the adsorption platform 6, then the adsorption platform 6 is made to move along the conveying direction of the conveying device through the moving device, when the adsorption platform 6 moves to the outer side of the circuit board, the adsorption platform 6 is controlled to ascend, then the rotating motor is controlled to rotate, and the second side plate 52 is connected with the adsorption platform 6. And then controlling the adsorption platform 6 to adsorb the shielding cover required by the bottom surface of the circuit board into the second limiting groove, press-fitting the shielding cover onto the bottom surface of the circuit board, then stopping the second negative pressure device, controlling the adsorption platform 6 to ascend, separating the circuit board from the circuit board, then controlling the fixing device to loosen the circuit board, and then controlling the first conveying belt 91 and the second conveying belt 92 to output the circuit board.

When the shielding cover is adsorbed, the first cylinder 62 is controlled to extend, so that the first sealing plate 63 moves, the first adsorption holes are sequentially communicated with the first negative pressure device, and sequential adsorption of the shielding cover is realized. The adsorption process of the second adsorption hole is the same.

When the adsorption table 6 is fixed, the first cylinder 62 and the second cylinder 66 are controlled to extend, and the first seal plate 63 and the second seal plate 67 are inserted into the first engagement groove 631 and the second engagement groove 671, thereby fixing.

When the second side plate 52 is connected to the adsorption stage 6, the driving motor 521 is controlled to rotate, so that the rotation preventing rods 522 rotate, and the moving plate 523 moves under the action of the external threads, so that the rotation preventing rods 522 move towards the rotation preventing holes and are fixed to the rotation preventing holes, thereby enhancing the connection stability of the second side plate 52 and the adsorption stage 6.

After the circuit board is turned over, the first supporting cylinder 8 is controlled to extend, so that the first supporting table 81 rises and is connected with the pressed shielding case.

A control method of an electromagnetic interference prevention press-fitting system comprises the following steps: when the adsorption platform 6 presses the shielding cover in the second limiting groove to the bottom surface of the circuit board, and after the shielding cover rises, the following steps are realized: a1: controlling the upper positioning plate 56, the lower positioning plate 54, the first sealing plate 63 and the second sealing plate 67 to contract, then controlling the adsorption platform 6 to rotate 180 degrees through the overturning motor 61, then controlling the upper positioning plate 56, the lower positioning plate 54, the first sealing plate 63 and the second sealing plate 67 to extend out, and then controlling the adsorption platform 6 to descend to press the shielding case; a2: the adsorption table 6 is controlled to ascend, and then the circuit board is output. When the circuit board is placed, the height of the shielding cover on the top surface of the circuit board is not higher than that of the shielding cover on the bottom surface, so that the adsorption table 6 can be pressed on the shielding cover.

After the press-fitting process, the shielding case on the bottom surface of the circuit board may be loosened by the second detection layer 68, and since the bottom surface and the top surface of the circuit board are generally different, the arrangement of the first limiting groove and the second limiting groove is different, so that the adsorption table 6 can be controlled to rotate 180 degrees and then be pressed tightly, and the next press-fitting process can be continued after being turned over.

A control method of an electromagnetic interference prevention press-fitting system comprises the following steps: after the press mounting process is finished, if the infrared sensor senses that the shielding cover is positioned in the limiting groove, the following steps are carried out: b1, controlling the adsorption platform 6 to move to the upper part of the vacant platform by the moving device; and B2, controlling the upper positioning plate 56, the lower positioning plate 54, the first sealing plate 63 and the second sealing plate 67 to contract, controlling the adsorption platform 6 to rotate for 90 degrees by the overturning motor 61, controlling fan blades of the first negative pressure device and the second negative pressure device to rotate reversely, blowing the shielding cover down onto the vacant platform by air flow, controlling the first negative pressure device and the second negative pressure device to stop, controlling the adsorption platform 6 to rotate by the overturning motor 61 to enable the first limiting groove to face downwards, controlling the upper positioning plate 56, the lower positioning plate 54, the first sealing plate 63 and the second sealing plate 67 to extend, and then carrying out the next press-fitting process.

The above-mentioned embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Claims

1. An electromagnetic interference prevention press-mounting system is characterized by comprising a base (1), two conveying devices, an adsorption device, a moving device, a fixing device, a control system and a display; the two conveying devices are symmetrically arranged above the base (1), and each conveying device comprises a mounting plate (9), a first conveying belt (91), a second conveying belt (92) and a position sensor; the two mounting plates (9) are arranged above the base (1) in parallel; the first conveying belts (91) are respectively arranged on the inner sides of the mounting plates (9), at least two first conveying rollers are arranged in the first conveying belts (91), and the first conveying rollers are connected with the mounting plates (9) through bearings; the second conveying belt (92) is arranged on the inner sides of the two mounting plates (9) and matched with the first conveying belt (91), at least two second conveying rollers are arranged in the second conveying belt (92), and the second conveying rollers are connected with the mounting plates (9); the fixing device is arranged between the two conveying devices and matched with the circuit board; the moving device comprises an X-axis moving structure (2), a Y-axis moving structure (3) and a Z-axis moving structure; the X-axis moving structure (2) is arranged above the conveying device, and the X-axis moving structure (2) comprises a first moving table; the Y-axis moving structure (3) is arranged on the first moving table, and the Y-axis moving structure (3) comprises a second moving table (31); the Z-axis moving structure comprises a lifting cylinder (4), the lifting cylinder (4) is arranged on the second moving platform (31), and the lifting cylinder (4) is positioned above the circuit board; the adsorption device comprises a first negative pressure device, an adsorption platform (6), a plurality of first adsorption holes, a plurality of first limiting grooves and a plurality of infrared sensors; the adsorption platform (6) is transversely arranged below the lifting cylinder (4), is connected with the telescopic end of the lifting cylinder (4) and is matched with the circuit board; the first limiting groove is a groove, is arranged on the bottom surface of the adsorption platform (6) and is respectively matched with the shapes of the shielding cases, a first detection layer (64) is arranged on the inner side surface of the first limiting groove, and the first detection layer (64) is an elastic rubber layer; the first adsorption holes are respectively arranged on the top surfaces of the first limiting grooves; the infrared sensors are respectively arranged on the top surfaces of the inner parts of the first limiting grooves; the first negative pressure device is communicated with the first adsorption holes; the control system is connected with the conveying device, the adsorption device, the moving device, the fixing device and the display.

2. An electromagnetic interference shielding press-fitting system according to claim 1, wherein: the adsorption device comprises a fixing plate (5), a first side plate (51), a second side plate (52), a turnover motor (61), a second negative pressure device, a plurality of second adsorption holes, a plurality of second limiting grooves and a turnover shaft; the fixed plate (5) is fixed at the telescopic end of the lifting cylinder (4); the first side plate (51) is fixed at the lower part of the fixing plate (5), is positioned at one side of the adsorption platform (6) and is positioned between the two conveying devices; the second side plate (52) is arranged below the fixed plate (5), is positioned on two sides of the adsorption platform (6), is arranged opposite to the first side plate (51), is connected with the fixed plate (5) through a rotating shaft at the upper part, is connected with a rotating motor through the rotating shaft of the second side plate (52), and is provided with an overturning groove on the inner side surface of the second side plate (52); the overturning motor (61) is fixed on the outer side surface of the first side plate (51), a rotating shaft of the overturning motor penetrates through the first side plate (51) and is fixed with the center of the side surface of the adsorption table (6), and the rotating shaft of the overturning motor (61) is arranged along the conveying direction of the conveying device; the overturning shaft is rod-shaped and is fixed on the side surface of the adsorption platform (6), and the axis of the overturning shaft is superposed with the rotation axis of the overturning motor (61) and matched with the overturning groove; the second limiting groove is arranged on the top surface of the adsorption platform (6) and is matched with the shapes of the plurality of shielding cases respectively, a second detection layer (68) is arranged on the inner side surface of the second limiting groove, and the second detection layer (68) is an elastic rubber layer; the second adsorption holes are respectively arranged on the inner bottom surfaces of the second limiting grooves; the plurality of infrared sensors are respectively arranged on the bottom surfaces inside the plurality of second limiting grooves; the second negative pressure device is communicated with the second adsorption holes.

3. An electromagnetic interference shielding press-fitting system according to claim 2, wherein: the adsorption device comprises a first communication cavity, a second communication cavity, a first sealing plate (63), a second sealing plate (67), a first air cylinder (62) and a second air cylinder (66); the first communication cavity is transversely arranged in the adsorption table (6); a first air cylinder (62) is arranged in the first communication cavity, and the first air cylinder (62) is arranged along the conveying direction of the conveying device; the first sealing plate (63) is arranged in the first communicating cavity, is tightly matched with the first communicating cavity and is fixed with the telescopic end of the first cylinder (62); the upper ports of the first adsorption holes are arranged on the inner bottom surface of the first communication cavity at intervals along the axial direction of the first cylinder (62) and are tightly matched with the first sealing plate (63); the first negative pressure device is communicated with one side, close to the first air cylinder (62), of the first communication cavity through a hose;

the second communicating cavity is transversely arranged in the adsorption table (6) and is positioned above the first communicating cavity; a second air cylinder (66) is arranged in the second communication cavity, and the second air cylinder (66) is arranged along the conveying direction of the conveying device; the second sealing plate (67) is arranged in the second communicating cavity, is tightly matched with the second communicating cavity and is fixed with the telescopic end of the second air cylinder (66); the lower ports of the second adsorption holes are arranged on the top surface of the interior of the second communication cavity at intervals along the axial direction of the second cylinder (66) and are tightly matched with the second sealing plate (67); the second negative pressure device is communicated with one side, close to the second air cylinder (66), of the second communication cavity through a hose.

4. An electromagnetic interference shielding press-fitting system according to claim 3, wherein: the adsorption device comprises a first matching groove (631), a second matching groove (671), at least two first supporting blocks (65) and at least two second supporting blocks (69); the direction of the first communication cavity facing the first side plate (51) is an opening, and the opening of the first communication cavity is far away from the first cylinder (62); the first matching groove (631) is arranged on the inner side surface of the first side plate (51) and is matched with the first sealing plate (63); the direction of the first side plate (51) of the second communication cavity surface is an opening, and the opening is far away from the second cylinder (66); the second matching groove (671) is arranged on the inner side face of the first side plate (51) and is matched with the second sealing plate (67), and the second matching groove (671) and the first matching groove (631) are centrosymmetric with the rotation axis of the overturning motor (61); the two first supporting blocks (65) are made of rubber materials, are fixed on the bottom surface of the adsorption table (6) and are matched with the circuit board; the two second supporting blocks (69) are made of rubber materials, are fixed on the top surface of the adsorption table (6) and are matched with the circuit board.

5. An electromagnetic interference shielding press-fitting system according to claim 2, wherein: the adsorption device comprises an upper positioning plate (56), a lower positioning plate (54), a first anti-rotation air cylinder (55), a second anti-rotation air cylinder (53), a plurality of anti-rotation rods (522), a moving plate (523) and a driving motor (521); a first sliding groove is transversely arranged on the inner side surface of the first side plate (51), and is positioned on one side of the rotation axis of the adsorption platform (6); the upper positioning plate (56) is arranged in the first sliding groove, is connected with the upper surface of the adsorption table (6) and is matched with the adsorption table (6) in a rotating way, and a rubber layer is arranged on the lower surface of the upper positioning plate (56); the first anti-rotation air cylinder (55) is arranged in the first sliding chute, and the telescopic end of the first anti-rotation air cylinder is fixed with the upper positioning plate (56);

a second sliding groove is transversely arranged on the inner side surface of the first side plate (51), is positioned on one side of the rotation axis of the adsorption platform (6) and is positioned below the first sliding groove; the lower positioning plate (54) is arranged in the second sliding groove, is connected with the lower surface of the adsorption table (6) and is matched with the rotation of the adsorption table (6), and a rubber layer is arranged on the upper surface of the lower positioning plate (54); the second anti-rotation air cylinder (53) is arranged in the second sliding chute, and the telescopic end of the second anti-rotation air cylinder is fixed with the upper positioning plate (56);

the inner side surface of the first side plate (51) is provided with a plurality of anti-rotation screw holes; the moving plate (523) is arranged on the outer side of the second side plate (52); one end of each anti-rotation rod (522) is connected to the inner side surface of the movable plate (523) through a bearing, the surface of each anti-rotation rod is provided with an external thread and penetrates through the second side plate (52) to be matched with the anti-rotation screw holes, the anti-rotation rods (522) are parallel to each other and arranged above the adsorption table (6), the anti-rotation rods (522) are sleeved with chain wheels, and the chain wheels are sleeved with chains; the rotating shaft of the driving motor (521) is connected with the anti-rotation rod (522).

6. An electromagnetic interference shielding press-fitting system according to claim 1, wherein: the fixing device comprises a first limiting plate (7), a second limiting plate (71), a protective layer (72), an adhesive layer (73), a first limiting cylinder, a second limiting cylinder and two supporting grooves; the first limiting plate (7) is vertically arranged between the two mounting plates (9), is arranged on one side of the circuit board along the conveying direction of the conveying device, is connected with the rotating shaft of the base (1) at the lower part, is matched with the adsorption platform (6) at the upper part, and is vertical to the conveying direction of the conveying device at the rotating axis; the first limiting cylinder is arranged on the side of the first limiting plate (7), and two ends of the first limiting cylinder are hinged with the first limiting plate (7) and the base (1) respectively; the protective layer (72) is a rubber layer and is arranged on the side surface, facing the circuit board, of the first limiting plate (7); the adhesive layer (73) is arranged on the protective layer (72);

the second limiting plate (71) is vertically arranged between the two mounting plates (9), arranged on the other side of the circuit board, arranged opposite to the first limiting plate (7), the lower part of the second limiting plate is connected with the rotating shaft of the base (1), the upper part of the second limiting plate is matched with the adsorption platform (6), and the rotating axis of the second limiting plate is vertical to the conveying direction of the conveying device; the second limiting cylinder is arranged on the side of the second limiting plate (71), and two ends of the second limiting cylinder are hinged with the second limiting plate (71) and the base (1) respectively; the two supporting grooves are respectively arranged at the upper parts of the first limiting plate (7) and the second limiting plate (71) and matched with the adsorption device.

7. An electromagnetic interference shielding press-fitting system according to claim 6, wherein: the fixing device comprises two pressing plates (85) and two fixing cylinders (86); a fixing groove is transversely formed in the inner side face of the mounting plate (9), the fixing groove is formed in the side of the circuit board, and the length of the fixing groove is matched with that of the circuit board; the two pressing plates (85) are respectively arranged in the fixing grooves, matched with the circuit board and matched with the first conveying roller and the second conveying roller, the inner side surfaces of the pressing plates (85) are inclined surfaces which incline downwards from the inner side to the outer side, and rubber layers are arranged on the inclined surfaces and matched with the circuit board; two fixed cylinders (86) are respectively arranged on the outer side of the mounting plate (9), the telescopic ends of the fixed cylinders penetrate through the mounting plate (9) and the pressing plate (85) to be connected, and the axes of the fixed cylinders (86) are transversely arranged.

8. An electromagnetic interference shielding press-fitting system according to claim 7, wherein: the fixing device comprises a plurality of first supporting cylinders (8), a plurality of second supporting cylinders (82), a first supporting platform (81), a second supporting platform (83) and a plurality of supporting rods (84); the first supporting cylinders (8) are vertically arranged between the two conveying devices; the first supporting table (81) is fixed at the telescopic ends of the first supporting cylinders (8), is positioned below the circuit board and is matched with the circuit board, and a rubber layer is arranged on the upper surface of the first supporting table (81); the second support table (83) is arranged below the first support table (81); the plurality of second supporting cylinders (82) are vertically arranged below the second supporting platform (83) and are fixed with the second supporting platform (83); the supporting rods (84) are fixed on the second supporting platform (83), the supporting rods (84) upwards penetrate through the second supporting platform (83), and rubber layers are arranged at the upper ends of the supporting rods (84) and matched with the circuit board.

9. A control method of an electromagnetic interference prevention press-fitting system is characterized by comprising the following steps:

when the adsorption platform (6) presses the shielding cover in the second limiting groove to the bottom surface of the circuit board and rises, the following steps are realized:

a1: the upper positioning plate (56), the lower positioning plate (54), the first sealing plate (63) and the second sealing plate (67) are controlled to contract, then the adsorption platform (6) is controlled to rotate 180 degrees through the overturning motor (61), then the upper positioning plate (56), the lower positioning plate (54), the first sealing plate (63) and the second sealing plate (67) are controlled to extend out, then the adsorption platform (6) is controlled to descend, and the shielding cover is pressed;

a2: the adsorption table (6) is controlled to ascend, and then the circuit board is output.

10. A control method of an electromagnetic interference prevention press-fitting system is characterized by comprising the following steps:

after the press mounting process is finished, if the infrared sensor senses that the shielding cover is positioned in the limiting groove, the following steps are carried out:

b1, controlling the adsorption platform (6) to move to the upper part of the vacant platform by the moving device;

b2, controlling the upper positioning plate (56), the lower positioning plate (54), the first sealing plate (63) and the second sealing plate (67) to contract, controlling the adsorption platform (6) to rotate for 90 degrees through the overturning motor (61), controlling fan blades of the first negative pressure device and the second negative pressure device to rotate reversely, blowing the shielding cover down to the vacant platform through air flow, controlling the first negative pressure device and the second negative pressure device to stop, controlling the adsorption platform (6) to rotate through the overturning motor (61), enabling the first limiting groove to face downwards, controlling the upper positioning plate (56), the lower positioning plate (54), the first sealing plate (63) and the second sealing plate (67) to extend, and then carrying out the next press fitting process.