CN113290359B - Equipment and method for automatic assembly of display bracket components based on double-layer circulating conveyor line - Google Patents

Abstract

The invention discloses an automatic assembly device and method for a display bracket assembly based on a double-layer circulating conveying line, and relates to the technical field of display bracket assembly equipment, including a rack, a tray, an inner plug supply mechanism, a bracket assembly mechanism and a double-layer circulating conveying mechanism; It is used for placing brackets and mandrels to realize the positioning and handling of the brackets and mandrels; the inner plug supply mechanism arranges the inner plugs in an orderly manner and transports them to the assembly station to provide the inner plugs for the automatic assembly of the bracket components; the double-layer circulating conveying mechanism It realizes the double-layer circulatory transportation of the pallet, and provides the bracket and the mandrel for the automatic assembly of the bracket assembly; the bracket assembly mechanism realizes the automatic assembly of the bracket, the mandrel and the inner plug. The invention has reasonable design and convenient operation, realizes the automatic assembly of the display bracket assembly, and improves the production efficiency of the display bracket assembly.

Description

Equipment and method for automatic assembly of display bracket components based on double-layer circulating conveyor line

technical field

The present invention relates to the technical field of display stand assembly equipment, in particular to an automatic assembly device and method of a display stand assembly based on a double-layer circulating conveying line.

Background technique

During the production and manufacturing process of the monitor stand, it needs to go through such processes as maintenance, assembly, spraying, and functional testing. In the process of spraying the stent, the inner surface of the stent does not need to be sprayed, so the inner surface of the stent is generally covered with accessories such as inner plugs and mandrels during the production process, so as to effectively prevent the powder from being sprayed to the stent during the spraying process. Inner surface, affecting product quality. At present, the main domestic manufacturers mainly rely on labor for the assembly between the monitor stand and the accessories. The labor intensity of workers is high and the production efficiency is low. In addition, the manual assembly process of the monitor stand is not standardized.

In order to improve the assembly efficiency and quality of the display stand assembly, it is urgent to develop an automatic assembly device and method for the display stand assembly, which is used to realize the automatic assembly of the stand assembly and improve the standardization of the display stand assembly process.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the defects existing in the prior art, and propose an automatic assembly device and method for a display bracket assembly based on a double-layer circulating conveying line.

In order to achieve the above object, the present invention adopts the following technical solutions:

Automatic assembly equipment for monitor bracket components based on double-layer circulating conveyor line, including:

Tray for display stand and mandrel;

an inner plug supply mechanism for supplying inner plugs to an assembly station, the assembly station being arranged at the end of the upper conveyor belt;

a bracket assembling mechanism for assembling the display bracket assembly, the bracket assembling mechanism is arranged on the top of the assembling station;

A double-layer circulating conveying mechanism for conveying pallets, the double-layer circulating conveying mechanism includes two parallel-arranged conveying lines;

a lifting device for carrying the pallet to lift and lower, and the lifting device is arranged at both ends of the conveyor belt;

The rack is used for installing the inner plug supply mechanism, the bracket assembling mechanism and the double-layer circulating conveying mechanism.

Further, the tray includes a support plate and a positioning assembly, and the positioning assembly is fixedly connected to the upper end surface of the support plate.

Furthermore, positioning grooves are provided on both sides of the pallet perpendicular to the conveying line.

Further, the inner plug supply mechanism includes a storage bin, the storage bin is connected to the direct vibration track through a feeding conveyor belt, and an inner plug platform is provided at one end of the direct vibration track away from the storage bin.

Further, the double-layer circulating conveying mechanism includes an upper-layer conveyor belt and a lower-layer conveyor belt, and a common end of the upper-layer conveyor belt and the lower-layer conveyor belt is provided with an assembly-level lifting plate, and the other end is provided with a pre-assembly-level lifting plate, The head end of the upper conveyor belt is provided with a pre-installation table, the pre-installation lifting plate entrance and exit are provided on the pre-installation worktable, and automatic locks are provided on both sides of the pre-installation lifting plate entrance and exit for supporting Trays, the pre-assembly position lifting plate is driven by the front lifting cylinder, and the assembly position lifting plate is driven by the rear lifting cylinder.

Further, the upper conveyor belt is provided with a front blocking device, the front blocking device is arranged on one side of the assembly position lifting plate, the front blocking device is driven by a front blocking cylinder, and the front blocking device is In order to block the pallet from traveling, a rear blocking device is arranged on the lower conveyor belt, and the rear blocking device is arranged on one side of the pre-installed lifting plate. The rear blocking device is driven by a rear blocking cylinder. The device is used to block the travel of the pallet.

Furthermore, the bracket assembling mechanism includes a three-position air cylinder, the three-position air cylinder is fixedly connected to the frame, a lift cylinder is fixedly connected to the free end of the piston rod of the three-position cylinder, and the lift cylinder piston rod is connected with the connecting plate through the connecting plate. The suction cup mounting plate is fixedly connected, the lower end surface of the suction cup mounting plate is provided with a bracket suction cup and a mandrel suction cup, and a pneumatic device is also arranged on the connecting plate, and the pneumatic device is used to drive the bracket to clamp the air claw to the assembled display bracket. Components are picked and placed.

Further, the frame is provided with an inner plug horizontal cylinder, the inner plug horizontal cylinder piston rod is fixedly connected with an inner plug vertical cylinder, the inner plug vertical cylinder piston rod is connected with a pneumatic device, and the pneumatic device is connected to the piston rod of the inner plug horizontal cylinder. The device is used to drive the inner plug gripper to pick and place the inner plug.

Based on the automatic assembly method of the display bracket assembly based on the double-layer circulating conveyor line, the above-mentioned automatic assembly equipment based on the double-layer circulating conveyor line display bracket assembly is used, and the following steps are included:

S1: Put the batch of inner plugs into the storage bin; the control system is activated, all mechanisms return to their original positions, the upper conveyor belt and the lower conveyor belt start to run, the feeding conveyor belt, the vibrating plate and the straightener start to work, and the inward plug The platform conveys the inner plug;

S2: Place the empty tray on the pre-installation table in the specified direction at the pre-installation station, and place the mandrel, the first bracket, and the second bracket to the corresponding position of the tray as required. The workpiece pallet is pushed to the upper conveyor belt;

S3: The upper conveyor belt drives the workpiece pallet to move forward to the assembly position, that is, the workpiece pallet moves to the assembly position lifting plate; the front blocking cylinder acts to drive the front blocking device to move upward, preventing the pallet on the upper conveyor belt from moving up and down to the assembly position plate movement;

S4: when it is detected that the workpiece pallet reaches the lifting plate at the assembly position and the inner plug reaches the inner plug platform, that is, after the mandrel, the bracket and the inner plug are all in place, the bracket assembly mechanism moves to assemble the bracket assembly;

S5: After the bracket assembly is automatically assembled and unloaded, the front lift cylinder is retracted downward, the assembly position lift plate drives the empty tray down to the lower conveyor belt, and the empty tray moves with the lower conveyor belt to the pre-installation station;

S6: After the empty pallet leaves the lifting plate at the assembly position, the front lifting cylinder extends upward, and the lifting plate at the assembly position is sent to the assembly station. The lifting plate at the assembly position moves to start the automatic assembly of the next bracket assembly;

S7: Driven by the lower conveyor belt, the empty pallet moves backward to just below the pre-installation station, that is, the empty pallet moves to the lifting plate of the pre-installation position; the rear blocking cylinder acts to drive the rear blocking device to move upward to prevent the lower conveyor belt The upper tray moves to the pre-installation lift plate;

S8: When it is detected that there is no pallet on the pre-installation table, the rear lift cylinder extends upwards, and the pre-installation lifting plate drives the empty tray to move up to the pre-installation table, and the empty tray is supported by the automatic lock;

S9: The rear lift cylinder retracts downward, the pre-installation lift plate returns to the lower layer, the rear blocking cylinder acts, drives the rear blocking device to move downward, releases the empty tray to move to the pre-installation lift plate, and the pre-installation lift plate continues to undertake next empty tray;

S10: Repeat the above steps S2-S9.

Further, the step S1 also includes a self-checking step, a detection device is provided on the inner plug platform, the delivery of the inner plug is stopped after the inner plug is detected, and the inner plug is continuously supplied when the inner plug is not detected.

Compared with the prior art, the beneficial effects of the present invention are:

Through the arrangement of the invention, an automatic assembly device and method of a display bracket assembly based on a double-layer circulating conveying line are disclosed, so as to realize the automatic assembly of the display bracket assembly, in which the trays can be stacked on the conveyor belt, and the detection speed of the worker and the assembly speed of the bracket assembly are There is no need for complete matching, which reduces the labor intensity of workers, coordinates the rhythm difference between the work stations, improves the production efficiency, and improves the standardization of the assembly process of the display stand assembly.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention.

FIG. 1 is a schematic structural diagram of a display stand assembly proposed by the present invention;

Fig. 2 is the structural representation of the tray proposed by the present invention;

FIG. 3 is a diagram showing the cooperation relationship between the display stand and the tray proposed by the present invention;

4 is a schematic diagram of the overall structure of the automatic assembly equipment for the display bracket assembly based on the double-layer circulating conveyor line proposed by the present invention;

5 is a schematic structural diagram of the inner plug supply mechanism proposed by the present invention;

6 is a schematic structural diagram of a double-layer circulating conveying mechanism proposed by the present invention;

7 is a schematic structural diagram of the bracket assembly mechanism proposed by the present invention;

FIG. 8 is a flow chart of the automatic assembly method of the display stand assembly based on the double-layer circulating conveying line of the present invention.

In the picture:

rack 1;

Tray 2, support plate 201, step pin 202, round hole pin 203, V-shaped block 204, mandrel positioning pin 205, bracket positioning pin 206, detection screw 207;

Inner plug supply mechanism 3, storage bin 301, feeding conveyor belt 302, vibrating plate 303, straight vibration track 304, straight vibrator 305, and inner plug platform 306;

Bracket assembly mechanism 4, three-position cylinder 401, lifting cylinder 402, bracket suction cup 403, mandrel suction cup 404, bracket clamping air claw 405, inner plug clamping air claw 406, inner plug vertical cylinder 407, inner plug horizontal cylinder 408 ;

Double-layer circulating conveying mechanism 5, pre-installation table 501, automatic lock 502, lower conveyor belt 503, upper conveyor belt 504, front blocking cylinder 505, front blocking device 506, assembly position lifting plate 507, front lifting cylinder 508, Rear blocking device 509, rear blocking cylinder 510, pre-installed lifting plate 511, rear lifting cylinder 512;

Inner plug 61 , mandrel 62 , first bracket 63 , second bracket 64 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention.

The composition structure of the display stand assembly referred to in this application is shown in FIG. 1, which is composed of an inner plug 61, a mandrel 62, a first support 63 and a second support 64. In the prior art, the display stand assembly assembly process uses manual labor To carry out the device, during manual assembly, the first bracket and the second bracket need to be separated first, then the inner plug is placed in the round hole at the end of the bracket, the mandrel is placed in the specified position inside the bracket, and the two brackets are closed to form A complete bracket assembly to ensure that there is no plastic powder on the inner surface of the bracket during the spraying process and to ensure product quality; the designed automatic assembly equipment for display bracket components based on double-layer circulating conveyor lines changes the way of manual assembly and realizes automatic assembly of bracket components. .

The positioning and transportation of the bracket and the mandrel are realized by the tray 2, and the positional relationship of the first bracket, the second bracket and the mandrel on the tray 2 is shown in Figure 3;

As shown in FIG. 4 , an automatic assembly device and method for a display bracket assembly based on a double-layer circulating conveying line, including a rack 1, a tray 2, an inner plug supply mechanism 3, a bracket assembly mechanism 4, and a double-layer circulating conveying mechanism 5;

The tray 2 is placed on the double-layer circulating conveying line for the placement and positioning of the bracket and the mandrel, and the support and the mandrel are conveyed to the assembly station through the double-layer circulating conveying mechanism 5;

The inner plug supply mechanism 3 realizes that the inner plugs vibrate in an orderly arrangement and are transported to the assembly station, providing inner plugs for the automatic assembly of the bracket assembly;

The bracket assembly mechanism 4 is used to realize the automatic assembly of the first bracket 63, the second bracket 64, the mandrel 62 and the inner plug 61;

The double-layer circulating conveying mechanism 5 is used to solve the turnover problem of the pallet 2, realize the double-layer circulating transportation of the pallet 2, and automatically assemble the conveying bracket and the mandrel for the bracket assembly;

Specifically, as shown in Figure 2, the tray 2 mainly includes a support plate 201, a stepped pin 202, a round hole pin 203, a V-shaped block 204, a mandrel positioning pin 205, a bracket positioning pin 206 and a detection screw 207. The support plate is in a flat plate structure. The support plate 201 is used to install the positioning element of the bracket and the mandrel, and its upper end surface is provided with a step pin 202, a round hole pin 203, a V-shaped block 204, a mandrel positioning pin 205, a bracket positioning pin 206 and a detection screw 207, the support plate Two semicircular limit grooves are designed on both ends of the 201 perpendicular to the traveling direction of the conveyor belt, which are used to block the tray 2 in cooperation with the blocking device at the designated position;

As shown in FIG. 3 , step pins 202, round hole pins 203, and V-shaped blocks 204 are used for the placement and positioning of brackets and mandrels; Placement direction, to prevent the wrong placement direction lead to assembly errors; the detection screw 207 is installed on the side of the pallet, used for proximity sensor to detect the position of the pallet 2;

As shown in FIG. 5 , the inner plug supply mechanism 3 includes a storage bin 301, a feeding conveyor belt 302, a vibrating plate 303, a straight vibration track 304, a straight vibrator 305, and an inner plug platform 306;

The storage bin 301 is installed on the platen to store the inner plugs; the feeding conveyor belt 302 is installed inside the storage bin 301 to supplement the inner plugs in the storage bin 301 to the vibration when the vibrating plate 303 is insufficient in internal plugs In the disc 303; the vibrating disc 303 and the straight vibrator 305 are used for the vibrating feeding of the inner plug, and after adjusting the inner plug to a specified posture, it moves to the inner plug platform 306 along the direct vibration track 304; the inner plug platform 306 is used for Undertake and position the inner plug in the direct vibration track 304 to provide the inner plug for automatic assembly of the bracket assembly;

As shown in FIG. 6 , the double-layer circulating conveying mechanism 5 includes a pre-installation table 501 , an automatic lock 502 , a lower conveyor belt 503 , an upper conveyor belt 504 , a front blocking cylinder 505 , a front blocking device 506 , and an assembly position lifting plate 507 , Front lifting cylinder 508, rear blocking device 509, rear blocking cylinder 510, pre-installed lifting plate 511, rear lifting cylinder 512;

The pre-installation workbench 501 is provided with a lift plate entrance and exit, and four automatic locks 502 are installed on both sides of the lift plate entrance and exit to hold the empty tray 2, waiting for the worker to place the bracket and the mandrel correctly on the tray 2; The upper conveyor belt 504 is driven by the speed regulating motor to move forward, and is used to transport the tray 2 with the bracket and the mandrel from the pre-installation station to the assembly station. The pre-assembly station is located at the head end of the upper conveyor belt 504 , at the pre-installation table 501; the assembly station is located at the end of the upper conveyor belt 504 and below the bracket assembly mechanism 4;

The lower conveyor belt 503 is arranged in parallel with the upper conveyor belt 504, and the upper conveyor belt 504 is located directly above the lower conveyor belt 503. The two conveyor belts, the two lift plates and the driving components form a cycle, wherein the upper conveyor belt 504 is driven by a speed regulating motor It moves backwards to transport the empty tray 2 from the bottom of the assembly station to the bottom of the pre-installation station, so as to realize the turnover of the tray 2; the assembly position lifting plate 507 is connected to the front lifting cylinder 508, and the front lifting cylinder 508 extends upward. , the assembly position lifting plate 507 is sent to the assembly station to receive the tray 2 conveyed by the upper conveyor belt 504; after the automatic assembly of the bracket assembly is completed, the front lifting cylinder 508 is retracted downward, and the assembly position lifting plate 507 drives the empty tray 2 to move down On the lower conveyor belt 503, the empty pallet 2 moves backwards with the lower conveyor belt 503; the front blocking device 506 is installed on the front blocking cylinder 505, and two positioning pins are installed on the front blocking device 506. The front blocking device 506 rises under the action of the front blocking cylinder 505 to block the tray 2 on the upper conveyor belt 504, preventing the tray 2 from moving to the assembly position lifting plate 507, which is a pre-installation station. Remaining assembly time;

The pre-installation lift plate 511 is connected to the rear lift cylinder 512, the rear lift cylinder 512 extends, the pre-installation lift plate 511 drives the empty tray 2 to rise to the pre-installation station, and the empty tray 2 is supported by four automatic locks 502. Realize the double-layer cyclic conveyance of the pallet 2; the rear lift cylinder 512 is retracted, the pre-installed lift plate 511 returns to the lower layer, and accepts the empty pallet 2 conveyed by the lower conveyor belt 503; the rear blocking device 509 is installed on the rear blocking cylinder 510. Under the action of the rear blocking cylinder 510, the rear blocking device 509 rises to block the tray 2 on the lower conveyor belt 503, preventing the empty tray 2 from moving to the pre-installed lifting plate 511;

As shown in FIG. 7 , the bracket assembly mechanism 4 is installed on the frame 1 to realize the automatic assembly of the first bracket, the second bracket, the inner plug and the mandrel; the bracket assembly mechanism 4 includes a three-position cylinder 401 and a lifting cylinder 402 , bracket suction cup 403, mandrel suction cup 404, bracket clamping air claw 405, inner plug clamping air claw 406, inner plug vertical cylinder 407, inner plug horizontal cylinder 408; In order to realize the switching of three stations, including the original position, the assembly position, and the discharge position; the lifting cylinder 402 is installed on the piston rod of the three-position cylinder 401 through the connecting plate; the bracket suction cup 403 and the mandrel suction cup 404 are installed on the suction cup mounting plate, It is connected with the lifting cylinder 402 through the connecting plate to realize the suction and release of the bracket and the mandrel; the inner plug clamping air claw 406 is connected with the inner plug vertical cylinder 407 through the connecting plate, and the inner plug vertical cylinder 407 passes through the connecting plate. It is connected with the inner plug horizontal cylinder 408 to realize the clamping and placement of the inner plug; the bracket clamping air claw 405 is connected to the lifting cylinder 402 through the connecting plate, and is used for unloading the assembled bracket assembly; wherein, the inner plug Both the gripping gripper 406 and the bracket gripping gripper 405 are driven to open and close by a pneumatic device, so as to realize the pick-and-place of the assembled display stand assembly.

The automatic assembly method of the display bracket assembly based on the double-layer circulating conveyor line includes the following steps:

(1) Put the batch of inner plugs into the storage bin 301; the control system is activated, each mechanism returns to the initial position, the upper conveyor belt 504 and the lower conveyor belt 503 start to run, the feeding conveyor belt 302, the vibrating plate 303 and the straight vibrator 305 starts working, delivering the inner plug to the inner plug platform 306;

(2) Place the empty tray 2 on the pre-installation table 501 in the specified direction at the pre-installation station, and place the mandrel, the first bracket and the second bracket to the corresponding positions of the tray 2 as required, and place the After the placement is completed, the workpiece pallet 2 is pushed to the upper conveyor belt 504, and the worker continues to place the workpiece on the next pallet 2;

(3) The upper conveyor belt 504 drives the workpiece tray 2 to move forward to the assembly station, that is, the workpiece tray 2 moves to the assembly position lifting plate 507; the action of the front blocking cylinder 505 drives the front blocking device 506 to move upward, preventing the upper conveyor belt The tray 2 on 504 moves to the assembly position lifting plate 507;

(4) When it is detected that the workpiece tray 2 reaches the assembly position lifting plate 507 and the inner plug reaches the inner plug platform 306, that is, after the mandrel, the bracket and the inner plug are all in place, the bracket assembly mechanism 4 moves to automatically assemble the bracket assembly;

(5) After the bracket assembly is automatically assembled and unloaded, the front lift cylinder 508 is retracted downward, the assembly position lift plate 507 drives the empty tray 2 to move down to the lower conveyor belt 503, and the empty tray 2 follows the lower conveyor belt 503. Pre-installation station moves;

(6) After the empty pallet 2 leaves the lifting plate 507 at the assembly position, the front lifting cylinder 508 extends upward, and the lifting plate 507 at the assembly position is sent to the assembly station. The workpiece tray 2 on the conveyor belt 504 moves to the assembly position lifting plate 507 to start the automatic assembly of the next bracket assembly;

(7) The empty pallet 2 is moved backwards under the pre-installation station under the driving of the lower conveyor belt 503, that is, the empty pallet 2 moves to the pre-installation lift plate 511; the rear blocking cylinder 510 acts to drive the rear blocking device 509 Move up to prevent the tray 2 on the lower conveyor belt 503 from moving to the pre-installation lift plate 511;

(8) When it is detected that there is no tray 2 on the pre-installation table 501, the rear lift cylinder 512 extends upward, and the pre-installation lifting plate 511 drives the empty tray 2 to move up to the pre-installation table 501, and the empty tray 2 It is supported by four automatic locks 502 to realize the double-layer circulation transportation of the tray 2;

(9) The rear lift cylinder 512 retracts downward, the pre-installed lift plate 511 returns to the lower layer, the rear blocking cylinder 510 moves, and drives the rear blocking device 509 to move downward, and no longer blocks the empty tray 2 from the pre-installed lift plate 511 Moving, the pre-installation lift plate 511 continues to receive the next empty tray 2 .

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (2)

1. Based on double-deck circulation transfer chain display bracket component automatic assembly equipment, its characterized in that includes:

the tray is used for placing the display bracket and the core rod;

the inner plug feeding mechanism is used for feeding inner plugs to an assembly station, and the assembly station is arranged at the tail end of the upper-layer conveying belt;

the bracket assembling mechanism is used for assembling the display bracket assembly and is arranged at the top of the assembling station;

the double-layer circulating conveying mechanism is used for conveying the tray and comprises two layers of conveying lines which are arranged in parallel;

the lifting device is used for lifting the bearing tray and is arranged at two ends of the conveying belt;

the inner plug feeding mechanism, the bracket assembling mechanism and the double-layer circulating conveying mechanism are arranged on the rack;

the tray comprises a supporting plate and a positioning assembly, and the positioning assembly is fixedly connected to the upper end face of the supporting plate;

positioning grooves are formed in the two sides, perpendicular to the conveying line, of the supporting plate;

the inner plug supply mechanism comprises a storage bin, the storage bin is connected with a direct vibration rail through a feeding conveyer belt, and an inner plug platform is arranged at one end, far away from the storage bin, of the direct vibration rail;

the double-layer circulating conveying mechanism comprises an upper layer conveying belt and a lower layer conveying belt, wherein an assembly position lifting plate is arranged at one common end of the upper layer conveying belt and the lower layer conveying belt, a preassembly position lifting plate is arranged at the other common end of the upper layer conveying belt and the lower layer conveying belt, a preassembly position workbench is arranged at the head end of the upper layer conveying belt, a preassembly lifting plate inlet and outlet are formed in the preassembly position workbench, automatic buckles are arranged on two sides of the inlet and outlet of the preassembly lifting plate and used for supporting a tray, the preassembly lifting plate is driven by a front lifting cylinder, and the assembly position lifting plate is driven by a rear lifting cylinder;

the upper-layer conveying belt is provided with a front blocking device, the front blocking device is arranged on one side of the assembly position lifting plate and is driven by a front blocking cylinder, the front blocking device is used for blocking the tray from advancing, the lower-layer conveying belt is provided with a rear blocking device, the rear blocking device is arranged on one side of the pre-assembly position lifting plate and is driven by a rear blocking cylinder, and the rear blocking device is used for blocking the tray from advancing;

the support assembly mechanism comprises a three-position air cylinder, the three-position air cylinder is fixedly connected to the rack, a lifting air cylinder is fixedly connected to the free end of a piston rod of the three-position air cylinder, the piston rod of the lifting air cylinder is fixedly connected with a sucker mounting plate through a connecting plate, a support sucker and a core rod sucker are arranged on the lower end face of the sucker mounting plate, a pneumatic device is further arranged on the connecting plate, and the pneumatic device is used for driving a support clamping air claw to take and place the assembled display support assembly;

an inner plug horizontal cylinder is arranged on the rack, an inner plug vertical cylinder is fixedly connected to a piston rod of the inner plug horizontal cylinder, a pneumatic device is connected to a piston rod of the inner plug vertical cylinder, and the pneumatic device is used for driving an inner plug clamping air claw to pick and place the inner plug;

the automatic assembling method of the display bracket assembly based on the double-layer circulating conveyor line comprises the following steps:

s1: putting the batched inner plugs into a storage bin; the control system is started, all the mechanisms are restored to the initial positions, the upper layer conveying belt and the lower layer conveying belt start to run, the feeding conveying belt, the vibrating disc and the straight vibrator start to work, and the inner plugs are conveyed to the inner plug platform;

s2, placing the empty tray on a preassembly workbench in a preassembly station according to a specified direction, placing the core rod, the first support and the second support at corresponding positions of the tray as required, and pushing the workpiece tray to an upper-layer conveyer belt after the placement is finished;

s3: the upper layer conveying belt drives the workpiece tray to move forwards to an assembly station, namely the workpiece tray moves to an assembly station lifting plate; the front blocking cylinder acts to drive the front blocking device to move upwards to prevent the tray on the upper layer conveying belt from moving to the assembly position lifting plate;

s4, when the workpiece tray reaches the assembly position lifting plate and the inner plug reaches the inner plug platform, namely the mandrel, the bracket and the inner plug are all in place, the bracket assembly mechanism acts to assemble the bracket assembly;

s5: after the support assembly is automatically assembled and unloaded, the front lifting cylinder retracts downwards, the assembly position lifting plate drives the empty tray to move downwards to the lower layer conveying belt, and the empty tray moves to the preassembly station along with the lower layer conveying belt;

s6: after the empty pallet leaves the assembly position lifting plate, the front lifting cylinder extends upwards, the assembly position lifting plate is conveyed to an assembly station, the front blocking cylinder acts to drive the front blocking device to move downwards, the workpiece pallet on the upper layer conveying belt moves towards the assembly position lifting plate, and automatic assembly of the next bracket component is started;

s7: the empty tray is driven by the lower layer conveying belt to move backwards to a position right below the preassembly station, namely the empty tray moves to the preassembly lifting plate; the rear blocking cylinder acts to drive the rear blocking device to move upwards and prevent the tray on the lower layer conveying belt from moving to the pre-positioning lifting plate;

s8: when no tray is detected on the pre-positioning workbench, the rear lifting cylinder extends upwards, the pre-positioning lifting plate drives the empty tray to move upwards to the pre-positioning workbench, and the empty tray is supported by the automatic lock catch;

s9: the rear lifting cylinder retracts downwards, the pre-positioning lifting plate returns to the lower layer, the rear blocking cylinder acts to drive the rear blocking device to move downwards, the empty tray is released to move towards the pre-positioning lifting plate, and the pre-positioning lifting plate continues to receive the next empty tray;

s10: the above steps S2-S9 are repeated.

2. The automatic assembling equipment for the display bracket assembly based on the double-layer circulation conveying line according to claim 1, wherein the step S1 further comprises a self-inspection step, a detection device is arranged at the inner plug platform, the conveying of the inner plug is stopped after the inner plug is detected, and the inner plug is continuously supplied when the inner plug is not detected.

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