Surface mounting machine

Abstract

At least one piece of gauze is attached to release paper to form sheet materials, the multiple sheet materials are attached between a bottom belt and a top film at equal intervals and coiled into a roll shape to form a material roll, and the surface-mounting machine comprises a belt conveying line, a feeding device, a pressure maintaining device, a film tearing device and an assembling device; the belt conveying line is used for conveying a middle frame, the feeding device comprises a driving mechanism, a material stripping table and a material receiving table, the material stripping table and the material receiving table are oppositely arranged, the driving mechanism is used for driving a material roll to rotate, the material stripping table can strip sheet materials on the wound material roll to the material receiving table one by one, and the assembling device sucks the sheet materials on the material receiving table through a suction head. The middle frame is provided with an assembly hole, the gauze on the sheet material is obliquely attached to the assembly hole of the middle frame, a pressing head of the pressure maintaining device obliquely abuts against the gauze in the assembly hole, and the film tearing device righting release paper of the inclined sheet material through a material shifting rod, clamps the release paper through a clamping jaw and drives the clamped release paper to rotate and move. And the release paper is torn off from the gauze.

Description

Technical Field

[0001] The invention relates to the field of electronic product assembly, and in particular to a mounting machine for mounting a mobile phone microphone into an assembly hole of a mobile phone middle frame using a mesh. Background Art

[0002] With the rapid development of science and technology, people have higher and higher requirements for the quality of electronic products such as mobile phones, tablet computers, headphones, etc., and they also pursue a design-oriented appearance while requiring high quality. Therefore, more and more electronic products are designed to be smaller, thinner and have a certain curvature. Therefore, electronic products are also developing towards high-density integration and ultra-fineness. Correspondingly, the requirements for electronic product assembly equipment are also getting higher and higher.

[0003] Among them, when the mobile phone microphone is mounted with mesh into the assembly hole of the mobile phone middle frame, since the mobile phone itself is small and thin, the size of the assembly hole on the frame for mesh assembly is correspondingly small, and the assembly hole is often not a straight hole, but an inclined hole or a stepped hole with a certain inclination. Combined with the fact that the mesh is not a planar structure but a cover-like structure with a certain curvature, it is not easy to position and mount during the assembly process. It is difficult for general assembly equipment to accurately and efficiently mount the mesh into the assembly hole.

[0004] At present, mesh is usually mounted to the assembly hole manually with the help of handheld tools such as tweezers or vacuum pens, and most of the mounting operations need to be performed under a 3-5x desktop magnifying glass or a 5-20x stereo microscope, which is labor-intensive, and the mounting accuracy and efficiency cannot be effectively controlled, thus failing to meet the requirements of efficient production. Moreover, during mounting, the middle frame is usually tilted to facilitate the mounting of the mesh, so the middle frame is also tilted for positioning, making the mounting operation more difficult. In addition, in order to facilitate operation, the mesh is often pasted on release paper for positioning and mounting, so the release paper is also torn off from the mesh mounted in the assembly hole, but when the release paper is torn off, the mesh will move, causing the mesh in the assembly hole to shift or be taken out of the assembly hole, thereby affecting the mounting accuracy and effect.

[0005] In addition, mesh is currently mostly fed in sheets. The mesh is pasted on release paper, and multiple release papers with mesh are arranged in a matrix on the base paper to achieve sheet feeding. However, the number of mesh on each base paper is limited, and frequent material changes are required, which involves the transmission and positioning of each incoming material. The feeding efficiency is relatively low, and the feeding accuracy cannot be effectively guaranteed. When manually operating tweezers or vacuum pens to peel off each release paper and mesh from the pasted base paper, it is also necessary to operate under a 3-5x desktop magnifying glass or a 5-20x stereo microscope. The manual peeling efficiency is low and the peeling accuracy cannot be effectively guaranteed.

[0006] Therefore, a placement machine that can realize automated operation, has a simple structure, high efficiency, high placement accuracy and good placement effect is needed to overcome the above problems. Summary of the invention

[0007] The object of the present invention is to provide a placement machine with simple structure, high automation, high efficiency, high assembly precision and good effect.

[0008] In order to achieve the above-mentioned purpose, the present invention discloses a mounting machine, wherein at least one mesh is attached to a release paper to form a sheet, and a plurality of sheets are attached between a bottom belt and a top film at equal intervals and are wound into a roll to form a roll of material. The mounting machine comprises a belt conveyor arranged on a machine platform, a feeding device, a pressure holding device and a film tearing device arranged in sequence along the conveying direction of the belt conveyor on the machine platform, and an assembly device arranged between the belt conveyor and the feeding device; the belt conveyor is used to sequentially transfer the middle frame through the feeding device, the pressure holding device and the film tearing device, and the feeding device comprises a driving mechanism and a plurality of pressure holding devices arranged in opposite directions. The stripping table and the material receiving table, the driving mechanism is used to drive the material roll to rotate, so that the stripping table can peel off the sheets on the wound material roll one by one to the material receiving table, the assembling device sucks the sheets on the material receiving table through a suction head, and obliquely attaches the mesh on the sheets to the assembly holes of the middle frame, the pressure head of the pressure maintaining device obliquely presses the mesh in the assembly hole, the film tearing device straightens the release paper of the tilted sheet through the material removing rod, and clamps the release paper through the clamping claws and drives the clamped release paper to rotate and move, so as to tear the release paper from the mesh.

[0009] Preferably, the inclination angle of the suction head during assembly and the inclination angle of the pressure head during pressure maintenance both correspond to the inclination angle of the assembly hole.

[0010] Preferably, the mounting machine also includes a top camera arranged above the receiving table, a side camera arranged on the belt conveyor line, and a bottom camera arranged between the belt conveyor line and the assembly device, the top camera is used to identify the position coordinates of the sheet material on the receiving table, the side camera is used to identify the position coordinates of the assembly hole, and the bottom camera is used to identify the position coordinates of the mesh sucked up by the suction head.

[0011] Preferably, the side camera and the bottom camera are both arranged on the platform in an inclined manner, and the inclination angles correspond to the inclination angles of the assembly holes.

[0012] Preferably, the mounting machine further comprises a detection device arranged at the rear side relative to the film tearing device along the conveying direction of the belt conveyor line, and the detection device detects the mounting accuracy of the mesh from both inside and outside sides through two detection cameras.

[0013] Preferably, the feeding device also includes a base with at least one placement position, and also includes a top film disk for top film winding, a material roll disk for material roll loading and a bottom tape disk for bottom tape winding, which are arranged at the relatively rear side end of the base, and the driving motor of the driving mechanism is respectively connected to the top film disk, the material roll disk and the bottom tape disk to drive the three to rotate, and the stripping table and the receiving table are arranged at the relatively front side ends of the base, and the front side end of the stripping table has a stripping portion with a flat upper surface and an inclined lower surface, the top film at the starting end of the material roll loaded on the material roll disk is wound around the top film disk, and the bottom tape at the starting end of the material roll is wound around the stripping table and then connected to the bottom tape disk, and each sheet on the bottom tape is peeled off one by one from the bottom tape under the traction force of the driving motor and the thrust force of the stripping portion, and is pushed to the receiving table.

[0014] Preferably, the assembly device also includes a six-axis robot that drives the suction head to move back and forth between the receiving platform and the belt conveyor line, the suction head includes a mounting base connected to the output end of the six-axis robot, a pull-back cylinder installed at the relatively upper end of the mounting base, a vacuum adsorption plate connected to the output end of the pull-back cylinder, and at least one vacuum suction nozzle installed at the relatively lower end of the mounting base, the adsorption surface of the vacuum suction nozzle is smaller than the adsorption surface of the vacuum adsorption plate, and the number of the vacuum suction nozzles corresponds to the number of mesh on the release paper, and the vacuum adsorption plate and the vacuum suction nozzle respectively adsorb the release paper and the mesh.

[0015] Preferably, the pressure-maintaining device also includes a support frame installed on the machine, a transverse motor installed on the support frame, a vertical motor connected to the output end of the transverse motor, a cantilever arm connected to the output end of the vertical motor, a mounting plate obliquely installed on the cantilever arm, a sliding plate slidably arranged at the relatively front end of the mounting plate, and a pressure sensor installed at the relatively rear end of the mounting plate, a spring is connected between the relatively rear end of the sliding plate and the pressure sensor, and the relatively front end of the sliding plate is arranged with the pressure head corresponding to the number of mesh yarns on the release paper, and the transverse motor and the longitudinal motor are used to drive the pressure head to move along transverse and vertical straight lines respectively.

[0016] Preferably, the film tearing device also includes a support seat installed on the machine platform, a longitudinal motor installed on the support seat, a transverse motor connected to the output end of the longitudinal motor, a rotary motor connected to the output end of the transverse motor, a first vertical cylinder connected to the output end of the rotary motor, a positioning frame connected to the output end of the first vertical cylinder, a second vertical cylinder and a third vertical cylinder spaced apart and arranged on two opposite sides of the positioning frame, and a clamping cylinder connected to the output end of the second vertical cylinder, the clamping claw and the toggle rod are respectively connected to the output ends of the clamping cylinder and the third vertical cylinder, the clamping claw and the toggle rod are driven by the longitudinal motor, the transverse motor and the first vertical cylinder to move in the longitudinal, transverse and vertical directions, rotate under the drive of the rotary motor, and also move in the vertical direction under the drive of the second vertical cylinder and the third vertical cylinder, respectively, and the clamping cylinder is used to drive the clamping claw to clamp or release the release paper.

[0017] Preferably, the clamping jaws include two symmetrically arranged clamping heads, the clamping surfaces of the clamping heads are evenly distributed with a plurality of vertically arranged ribs, and the clamping heads are also provided with air outlets, which are opened on the clamping surfaces of the clamping heads and are used to blow the torn release paper away from the clamping heads.

[0018] Compared with the prior art, the feeding device, pressure-maintaining device and film-tearing device of the mounting machine of the present invention are arranged in sequence along the conveying direction of the belt conveyor line, and an assembly device is also arranged between the belt conveyor line and the feeding device, and the layout of the whole machine is reasonable and compact. Among them, the middle frame of the mobile phone is automatically conveyed by the belt conveyor line, and the mesh is automatically fed by the feeding device. Specifically, at least one mesh is attached to the release paper to form a sheet, and then each sheet is evenly spaced and attached between the bottom belt and the top film and rolled into a roll to form a roll. When in use, the drive mechanism of the feeding device drives the roll to rotate, so that the stripping table can strip the sheets on the wound roll one by one to the receiving table arranged opposite to it, which is convenient for the assembly device to take and deliver the stripped sheets. The roll feeding method is different from the existing sheet feeding method, which effectively reduces the frequency of material change, has high feeding efficiency and accurate positioning, and is suitable for the high efficiency requirements of automated production lines. The assembly device uses a suction head to obliquely attach the sucked mesh to the assembly hole of the middle frame, and after attachment, the pressure head of the pressure-maintaining device also obliquely presses the mesh assembled in the assembly hole, effectively strengthening the bonding force between the mesh and the middle frame in the limited and relatively irregular assembly hole, thereby improving the stability of the assembly and effectively preventing the mesh from shifting when the film-tearing device tears off the release paper. When tearing the film, the film-tearing device also straightens the release paper of the fallen sheet material through the material-shifting rod, and clamps the release paper through the clamping claws and drives the clamped release paper to rotate and move, so as to tear the release paper off the mesh. The overall structure of this machine is simple, and it can realize automatic feeding and assembly of the middle frame and mesh. During the attachment, pressure-maintaining and film-tearing processes, there is no need to tilt the middle frame, which effectively simplifies the structure and has high assembly accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a stereoscopic diagram of the mesh of the present invention being assembled into the assembly hole of the mobile phone middle frame.

[0020] Figure 2 It is a plan view of the material roll of the present invention when it is unfolded.

[0021] Figure 3 It is an exploded view of the material roll of the present invention when it is unfolded.

[0022] Figure 4 It is a three-dimensional diagram of the mounting machine of the present invention.

[0023] Figure 5 It is a plan view of the placement machine of the present invention.

[0024] Figure 6 It is a three-dimensional diagram of the feeding device of the present invention.

[0025] Figure 7 It is a three-dimensional diagram of the blowing mechanism of the present invention.

[0026] Figure 8It is a three-dimensional diagram of the assembly device of the present invention.

[0027] Fig. 9 It is a three-dimensional diagram of the suction tip of the present invention.

[0028] Fig.10 It is a three-dimensional diagram of the pressure maintaining device of the present invention.

[0029] Fig.11 It is a stereoscopic diagram of the film tearing device of the present invention.

[0030] Fig.12 It is a plan view of the film tearing device of the present invention. DETAILED DESCRIPTION

[0031] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0032] See also Figures 1 to 12 The present invention provides a mounting machine 100 for mounting a microphone of a mobile phone with a mesh 200 into an assembly hole 301 of a middle frame 300 of the mobile phone. The assembly hole 301 is arranged on the lower frame of the rectangular middle frame 300, and is specifically a straight hole, an inclined hole, or a stepped hole with a certain inclination. In addition, the number of assembly holes 301 on the middle frame 300 can be multiple, and multiple meshes 200 are assembled into each assembly hole 301 one by one. The mesh 200 is a cover-like structure with a certain curvature, and the spacing of its grids is relatively small. It is specifically made of metal material, and the color of the mesh 200 also corresponds to the color of the middle frame 300, such as black, white, gold or gray. In the present application, the mesh 200 is fed with coils to reduce the frequency of material changes and effectively improve the feeding efficiency. Specifically, at least one mesh 200 is attached to the release paper 400 to form a sheet 500, and a plurality of sheets 500 are attached between the corresponding bottom belt 600 and the top film 700 at equal intervals and rolled into a roll to form a roll 800. Each sheet 500 is attached to the bottom belt 600 with the side attached with the mesh 200 facing downward, and the top film 700 covers the top side of each sheet 500.

[0033] Combination Figures 1 to 3Specifically, the release paper 400 is roughly rectangular and thin-sheet-shaped, and includes a bonding portion 401 and a positioning portion 402 connected as one body, and the mesh 200 is pasted on the bonding portion 401, specifically, pasted on the bottom side of the bonding portion 401 by double-sided adhesive. Among them, the bonding portion 401 and the positioning portion 402 can be arranged in a one-to-one correspondence, in which case, the number of both is 1, or, a plurality of bonding portions 401 are arranged at intervals on a positioning portion 402, and a plurality of meshes 200 are pasted on each bonding portion 401 in a one-to-one correspondence. In this case, the number of meshes 200 pasted on the release paper 400 is 2, 3 or 4, but not limited thereto, so that the release paper 400 can realize synchronous feeding and mounting of multiple meshes 200 each time, effectively improving the feeding and mounting efficiency. Specifically, the shape and size of the fitting portion 401 correspond to the shape and size of the assembly hole 301 of the middle frame 300, and the width of the fitting portion 401 is smaller than the width of the positioning portion 402. The fitting portion 401 is convenient for fixing the mesh 200 with exquisite size, and the positioning portion 402 can provide a larger operating space, which is convenient for stripping and sucking and assembling the mesh 200. Further, the width of the connection between the fitting portion 401 and the positioning portion 402 is less than or equal to the width of the fitting portion 401, so that it is easy to bend, so that the fitting portion 401 can smoothly enter the assembly hole 301 of the middle frame 300. In addition, the connection between the fitting portion 401 and the positioning portion 402 is also provided with an avoidance hole 400a, so as to effectively reduce the hardness of the connection and facilitate bending. In addition, an observation hole 400b is also provided on the fitting portion 401, which is convenient for observing and identifying the mesh 200 at its bottom side end.

[0034] See also Figure 4 and Figure 5In general, the mounting machine 100 disclosed in the preferred embodiment of the present invention includes a belt conveyor line 10, a feeding device 20, an assembly device 30, a pressure-maintaining device 40 and a film-tearing device 50 arranged on a machine table 101. The feeding device 20, the pressure-maintaining device 40 and the film-tearing device 50 are arranged in sequence along the conveying direction of the belt conveyor line 10, and the assembly device 30 is arranged between the belt conveyor line 10 and the feeding device 20. Among them, the belt conveyor line 10 is used to convey the center frame 300, so that it passes through the feeding device 20, the pressure-maintaining device 40 and the film-tearing device 50 in sequence. The feeding device 20 includes a driving mechanism 21 and a stripping table 22 and a receiving table 23 arranged opposite to each other. The driving mechanism 21 is used to drive the material roll 800 to rotate, so that the stripping table 22 can peel off the sheets 500 on the wound material roll 800 one by one to the receiving table 23. The assembly device 30 sucks the sheet material 500 on the receiving platform 23 through the suction head 31, and obliquely attaches the mesh 200 on the sheet material 500 to the assembly hole 301 of the middle frame 300. The pressure head 41 of the pressure-maintaining device 40 obliquely presses the mesh 200 in the assembly hole 301. The film tearing device 50 straightens the release paper 400 of the fallen sheet material 500 through the material-moving rod 51, and clamps the release paper 400 through the clamping claw 52 and drives the clamped release paper 400 to rotate and move, so as to tear the release paper 400 from the mesh 200.

[0035] Of course, the placement machine 100 disclosed in the present invention also includes a control system connected to the belt conveyor 10, the feeding device 20, the assembly device 30, the pressure holding device 40 and the film tearing device 50, respectively, and the coordinated actions between the devices are controlled by the control system. It should be noted that the control system is an existing control system, and its structure and control principle are well known in the art, and will not be described in detail here.

[0036] See also Figure 4 and Figure 5In order to improve assembly accuracy and efficiency, in some embodiments, the mounting machine 100 of the present invention further includes a top camera 60 arranged above the receiving platform 23, and the top camera 60 is used to identify the position coordinates of the sheet material 500 received on the receiving platform 23, and send the identification information to the control system, and the control system then issues an instruction so that the assembly device 30 can accurately pick up the material. Of course, the top camera 60 is also used to identify whether there is a sheet material 500 received on the receiving platform 23 and the color of the received sheet material 500, so that the control system can determine whether to perform subsequent mounting operations. In addition, in some embodiments, the mounting machine 100 of the present invention further includes a side end camera 70 arranged on the side of the belt conveyor line 10, and the side end camera 70 is used to identify the position coordinates of the assembly hole 301, and send the identification information to the control system, and the control system then issues an instruction so that the assembly device 30 adjusts the position and angle of the sucked sheet material 500 to achieve accurate mounting, and during the mounting process, the side end camera 70 is also used to perform real-time alignment adjustment. In addition, in some embodiments, the mounting machine 100 of the present invention also includes a bottom camera 80 arranged between the belt conveyor line 10 and the assembly device 30. The bottom camera 80 is used to identify the position coordinates of the mesh 200 sucked by the suction head 31 and send the identification information to the control system. The control system then issues instructions so that the assembly device 30 can achieve accurate mounting.

[0037] It should be noted that the tilt angle of the suction head 31 during assembly and the tilt angle of the pressure head 41 during pressure holding correspond to the tilt angle of the assembly hole 301. The side camera 70 and the bottom camera 80 are also arranged on the machine 101 at an angle, and the tilt angles of the two correspond to the tilt angle of the assembly hole 301. That is, when the side camera 70, the bottom camera 80, the suction head 31 and the pressure head 41 complete the corresponding middle frame recognition, mesh recognition, mounting and pressure holding actions, their respective central axes are aligned with the central axis of the assembly hole 301, thereby completing the corresponding actions efficiently and accurately, effectively improving the assembly effect.

[0038] See also Figure 4 and Figure 5In some embodiments, the mounting machine 100 of the present invention further includes a detection device 90 arranged at the rear side of the film tearing device 40 along the conveying direction of the belt conveyor line 10. The detection device 90 detects the mounting accuracy of the mesh 200 from both inside and outside through a detection camera 91 and a detection camera 92, and sends the detection information to the control system. Among them, the detection camera 91 is located at the relatively inner side of the middle frame 300 and directly opposite to the assembly hole 301, and detects whether the deviation of the center position of the mesh 200 and the assembly hole 301 and the angle deviation of the grid of the mesh 200 are within the set error range. Another detection camera 92 is located at the relatively outer side of the middle frame 300 and at the side end position roughly flush with the assembly hole 301, and detects whether the mesh 200 protrudes from the assembly hole 301 and the light transmittance of the mesh 200. Among them, the detection camera 91 and the detection camera 92 both use prisms to realize the detection operation.

[0039] See also Figure 4 and Figure 5 Specifically, the belt conveyor line 10 is provided with a feeding position, an assembly position, a pressure holding position, a film tearing position and a detection position in sequence along its transmission direction. The assembly device 30, the pressure holding device 40, the film tearing device 50 and the detection device 90 are arranged at the assembly position, the pressure holding position, the film tearing position and the detection position one by one. The feeding device 20 is arranged in the area between the feeding position and the assembly position, which effectively utilizes the space and makes the overall layout more compact. Among them, a barcode scanner is provided at the feeding position, which is used to scan and identify the middle frame 300, and send the identification information to the control system so that other devices can act under the instruction of the control system. Among them, in order to achieve precise positioning of the middle frame 300 at each work station, the belt conveyor line 10 adopts a multi-section conveyor belt that is connected in sequence for feeding. A blocking mechanism and a lifting mechanism are also provided on the lower side of the conveying surface of the belt conveyor line 10 at the corresponding assembly position, pressure holding position, film tearing position and detection position. The blocking mechanism prevents or allows the carrier carrying the middle frame 300 to be transmitted on the belt conveyor line 10 through the lifting action of the blocking rod. The lifting mechanism pushes the carrier upward or downward through the lifting action of the pushing plate to detach from the belt conveyor line 10 or fall back onto the belt conveyor line 10, so as to complete the corresponding actions at each work station.

[0040] In specific operation, when the middle frame 300 flows into the feeding position of the belt conveyor 10 through the carrier, the scanner first scans and identifies the middle frame 300, and sends the identification information to the control system so that other devices can act under the instruction of the control system. After that, the belt conveyor 10 sequentially transmits the identified middle frame 300 to the assembly device 30, the pressure holding device 40, the film tearing device 50 and the detection device 90 to complete the corresponding assembly, pressure holding, film tearing and detection operations. After the detection is completed, the middle frame 300 equipped with the mesh 200 flows out of the machine from the detection position. Among them, defective products can be taken away manually at the detection position, or, when flowing into the next device together with good products, they can be taken away manually or by other rejection equipment.

[0041] See also Figure 6 and Figure 7 Specifically, the feeding device 20 also includes a base 24 having at least one placement position 24a and at least one support seat 25 slidably arranged on the placement position 24a in a one-to-one correspondence. The rear end of the support seat 25 is provided with a top film disc 26 for winding the top film 700, a material reel disc 27 for loading the material reel 800, and a bottom tape reel 28 for winding the bottom tape 600. The driving motor 211 of the driving mechanism 21 is also arranged at the rear end of the support seat 25, and is respectively connected to the top film disc 26, the material reel disc 27, and the bottom tape reel 28 to drive the three to rotate. The stripping table 22 and the receiving table 23 are arranged at the front ends of the support seat 25, and the front side end of the stripping table 22 has a stripping portion with a flat upper surface and an inclined lower surface. When two or more placement positions 24a are provided on the base 24, the number of corresponding support seats 25 is also two or more, so that by alternately entering and exiting each support seat 25 in the corresponding placement position 24a, not only is it convenient to load and unload the material roll 800, but it can also achieve uninterrupted material feeding, further adapting to the high-efficiency requirements of the automated production line.

[0042] Among them, the top film disk 26, the material reel 27 and the bottom belt reel 28 can be arranged in one-to-one correspondence with the driving motor 211, and the three driving motors 211 can drive the three to rotate respectively. Of course, the three can also be driven by one driving motor 211 to rotate synchronously, or the number of driving motors 211 is 2, and one of the top film disk 26 and the bottom belt reel 28 rotates synchronously with the material reel 27 driven by the same driving motor 211, and the other rotates under the drive of another driving motor 211. In addition, the driving mechanism 21 also includes a plurality of guide wheels 212, and guide wheels 212 are arranged between the material reel 27 and the top film disk 26, between the material reel 27 and the stripping table 22, and between the stripping table 22 and the bottom belt reel 28, so as to guide the conveying direction of the wound material roll 800.

[0043] Combination Figure 6 and Figure 7Specifically, in some embodiments, a blowing mechanism 29 is further arranged at the top side end of the receiving platform 23, and the blowing mechanism 29 blows air from obliquely above through a blowing plate 291 to blow the sheet material 500 that does not meet the requirements on the receiving platform 23 to a waste box 292 located at the relatively front side end of the receiving platform 23. Among them, the blowing plate 291 is arranged with a blowing hole, and the blowing hole is connected to an air source, so that defective products are blown from the receiving platform 23 to the waste box 292.

[0044] Specifically, the blowing mechanism 29 also includes a bracket 293 mounted on the side of the support seat 25, a horizontal motor 294 installed on the bracket 293, and a vertical cylinder 295 connected to the output end of the horizontal motor 294. The blowing plate 291 is obliquely connected to the output end of the vertical cylinder 295, so that it moves linearly in the front-to-back direction and the up-down direction under the drive of the horizontal motor 294 and the vertical cylinder 295 to realize the blowing operation. That is, a preliminary inspection is performed before mounting, so that the assembly device 30 only mounts the qualified mesh 200 on the middle frame 300, effectively improving the assembly efficiency and avoiding invalid operations. Among them, in some embodiments, the blowing plate 291 is arranged to be adjustable in position along the front-to-back direction, and the inclination angle of the blowing plate 291 is also adjustable. Specifically, an output end of the vertical cylinder 295 is connected to an adapter plate 296 , a cover plate 297 is adjustably mounted on the adapter plate 296 along the front-rear direction, and the blowing plate 291 is pivotally connected to the cover plate 297 .

[0045] It should be noted that the top camera 60 is arranged in a one-to-one correspondence with the receiving platform 23, or a top camera 60 moves back and forth between two receiving platforms 23 to respectively identify the sheets 500 on the two receiving platforms 23. Specifically, the top camera 60 moves between the two receiving platforms 23 through a horizontal linear module.

[0046] During specific operation, the top film at the starting end of the material roll 800 loaded on the material roll reel 252 is first wound around the top film reel 251, and the bottom tape 600 at the starting end of the material roll 800 is wound around the stripping table 22 and then connected to the bottom tape reel 253. When the driving motor 211 is activated, each sheet 500 on the bottom tape 600 is peeled off one by one from the bottom tape 600 under the action of the traction force of the driving motor 211 and the thrust force of the stripping part, and is pushed to the receiving table 23. The peeled sheet 500 is identified by the top camera 60, and only qualified products are left on the receiving table 23, and unqualified products are blown into the waste box 292 by the blowing mechanism 29.

[0047] See also Figure 8 and Fig. 9Specifically, the assembly device 30 also includes a six-axis robot 32 that drives the suction head 31 to and from the receiving platform 23 and the belt conveyor line 10. The suction head 31 includes a mounting seat 311 connected to the output end of the six-axis robot 32, a pull-back cylinder 312 installed at the upper end of the mounting seat 311, a vacuum adsorption plate 313 connected to the output end of the pull-back cylinder 312, and at least one vacuum suction nozzle 314 installed at the lower end of the mounting seat 311. The vacuum adsorption plate 313 is used to The release paper 400 of the sheet 500 is adsorbed, specifically the positioning portion 402 of the release paper 400 is adsorbed, the vacuum suction nozzle 314 is used to adsorb the mesh 200 of the sheet 500, specifically, the mesh 200 is adsorbed through the release paper 400 at the lower end of the release paper 400, that is, the mesh 200 is adsorbed through the bonding portion 401 of the release paper 400, and the pull-back cylinder 312 is used to drive the vacuum adsorption plate 313 to move in the opposite direction relative to the vacuum suction nozzle 314. Among them, the adsorption surface of the vacuum suction nozzle 314 is smaller than the adsorption surface of the vacuum adsorption plate 313, so that the vacuum adsorption plate 313 can easily adsorb and fix the relatively large release paper 400, and the relatively small vacuum suction nozzle 314 can provide a more precise adsorption force to accurately adsorb the small mesh 200. The number of vacuum nozzles 314 corresponds to the number of meshes 200 on the release paper 400, so that synchronous mounting of 1, 2, 3 or more meshes 200 can be achieved. In addition, a positioning protrusion 3141 is convexly provided on the adsorption surface of the vacuum nozzle 314. The shape of the positioning protrusion 3141 corresponds to the shape of the mesh 200, which is suitable for supporting and positioning irregular meshes 200, and is convenient for mounting.

[0048] Specifically, in some embodiments, a pressure sensor 315 is arranged on the relatively rear side of the relatively lower end of the mounting seat 311, and the vacuum suction nozzle 314 is arranged on the relatively front side of the relatively lower end of the mounting seat 311, and a compression spring arranged along the front-to-back direction is connected between the pressure sensor 315 and the vacuum suction nozzle 314, so that flexible mounting of the vacuum suction nozzle 314 is achieved through the compression spring, and the pressure sensor 315 is used to monitor the pressure of the vacuum suction nozzle 314 during mounting, thereby further ensuring the safety of the mounting operation and effectively protecting the middle frame 300 and the mesh 200.

[0049] During specific operation, the suction head 31 moves and rotates under the drive of the six-axis robot 32, so as to travel back and forth between the receiving table 23 and the belt conveyor line 10 to absorb the qualified sheet material 500 on the receiving table 23, and mount the absorbed sheet material 500 into the assembly hole 301 of the middle frame 300 located at the assembly position to complete the mounting operation. Among them, the release paper 400 and the mesh 200 of the sheet 500 are sucked by the vacuum adsorption plate 313 and the vacuum suction nozzle 314 respectively. When the sheet 500 is transferred to the opening of the assembly hole 301, when the six-axis robot 32 drives the vacuum suction nozzle 314 to continue to move to push the mesh 200 into the assembly hole 301 to achieve mounting, the pull-back cylinder 312 provides a reverse force relative to the six-axis robot 32, driving the vacuum adsorption plate 313 to move in the opposite direction relative to the vacuum suction nozzle 314, so that it does not extend into the assembly hole 301, but stays at the opening of the assembly hole 301. In some embodiments, when the suction head 31 is driven by the six-axis robot 32 to transfer and mount the sucked sheet material 500 to the assembly hole 301, the suction head 31 briefly stops at the bottom camera 80 of the path, which identifies and feeds back the position coordinates of the mesh 200 sucked by the suction head 31. The control system combines the identification information of the position coordinates of the assembly hole 301 fed back by the side camera 70, gives instructions, and the six-axis robot 32 drives the suction head 31 to move and rotate accordingly to adjust the position and angle of the sheet material 500, thereby achieving precise mounting.

[0050] It should be noted that, while the six-axis robot 32 drives the suction head 31 to move to the bottom camera 80, it also drives the suction head 31 to rotate a certain angle so that its inclination angle is consistent with the inclination angle of the bottom camera 80, thereby allowing the suction head 31 to be arranged in a manner consistent with the assembly angle, so that during the mounting process, the suction head 31 is translated from the position relative to the bottom camera 80 to the assembly position, and then vertically downward to the mounting height relative to the assembly hole 301, and then translated in the direction close to the assembly hole 301, until the mesh 200 is mounted in the assembly hole 301, thereby effectively improving the assembly efficiency and accuracy.

[0051] See also Fig.10 Specifically, the pressure-maintaining device 40 further includes a support frame 42 mounted on the machine 101, a horizontal motor 43 mounted on the support frame 42, a vertical motor 44 connected to the output end of the horizontal motor 43, a cantilever arm 45 connected to the output end of the vertical motor 44, a placement plate 46 obliquely mounted on the cantilever arm 45, a sliding plate 47 slidably mounted on the relatively front end of the placement plate 46, and a pressure sensor 48 mounted on the relatively rear end of the placement plate 46, a spring is connected between the relatively rear end of the sliding plate 47 and the pressure sensor 48, and a pressure head 41 corresponding to the number of meshes 200 on the release paper 400 is arranged at the relatively front end of the sliding plate 47. The pressure head 41 is specifically in the shape of a rod. Both the horizontal motor 43 and the vertical motor 44 use servo motors.

[0052] During specific operation, the pressure head 41 is driven by the horizontal motor 43 and the vertical motor 44 to move horizontally and vertically respectively, thereby extending into the assembly hole 301, and pressing the fitting part of the mesh 200 and the middle frame 300. During the pressing process, the flexible pressing of the pressure head 41 is achieved by the spring, and the pressing pressure of the pressure head 41 is monitored by the pressure sensor 48, thereby effectively ensuring the safety of the pressure maintaining operation and preventing damage to the middle frame 300 and the mesh 200.

[0053] See also Fig.11 and Fig.12 The film tearing device 50 also includes a support base 53 installed on the machine table 101, a longitudinal motor 54 installed on the support base 53, a transverse motor 55 connected to the output end of the longitudinal motor 54, a rotary motor 56 connected to the output end of the transverse motor 55, a first vertical cylinder 57 connected to the output end of the rotary motor 56, a positioning frame 58 connected to the output end of the first vertical cylinder 57, a second vertical cylinder 521 and a third vertical cylinder 511 installed at two opposite sides of the positioning frame 58 at intervals, and a clamping cylinder 522 connected to the output end of the second vertical cylinder 521, and the clamping claw 52 and the toggle rod 51 are respectively connected to the output ends of the clamping cylinder 522 and the third vertical cylinder 511. The clamping jaw 52 and the toggle rod 51 move synchronously in the longitudinal, transverse and vertical directions under the drive of the longitudinal motor 54, the transverse motor 55 and the first vertical cylinder 57, and rotate synchronously under the drive of the rotary motor 56, and move in the vertical straight line under the drive of the second vertical cylinder 521 and the third vertical cylinder 511 respectively, and the clamping jaw 52 also clamps or releases the release paper 400 under the drive of the clamping cylinder 522. Among them, the longitudinal motor 54 and the transverse motor 55 are both servo motors, and the first vertical cylinder 57, the second vertical cylinder 521 and the third vertical cylinder 511 are all slide cylinders.

[0054] Specifically, the clamping jaw 52 includes two symmetrically arranged clamping heads 52a, and the toggle rod 51 is roughly L-shaped and located at the relative center position of the two clamping heads 52a. Among them, the clamping surface of the clamping head 52a is evenly distributed with a plurality of convex ribs arranged along the vertical direction, which can not only improve the stability of the clamping, but also effectively reduce the contact surface, so as to facilitate the torn release paper 400 to be thrown away. In addition, in order to facilitate the tossing away of the release paper 400, an air outlet is also arranged on the clamping head 52a, and the air outlet is opened on the clamping surface of the clamping head 52a and connected to the air source, so as to blow the torn release paper 400 away from the clamping head 52a faster. Correspondingly, a waste paper collection box 59 with an upward opening is arranged on the side of the positioning frame 58, which is used to receive the release paper 400 thrown away by the clamping jaw 52.

[0055] During specific operation, the clamping jaw 52 and the toggle rod 51 are driven by the longitudinal motor 54, the transverse motor 55 and the first vertical cylinder 57 to move synchronously in the longitudinal, transverse and vertical directions respectively, so as to approach the sheet 500 mounted on the middle frame 300, specifically, to move to the side of the sheet 500 from the relatively inner side of the middle frame 300; and the toggle rod 51 is driven by the third vertical cylinder 511 to move in a vertical straight line to the bottom of the tilted release paper 400, and the clamping jaw 52 and the toggle rod 51 are also driven by the longitudinal motor 54 to move synchronously in the longitudinal direction, so that the toggle rod 51 moves to abut against the release paper 400, at which time, the clamping jaw 52 moves correspondingly to the top of the release paper 400; then, the toggle rod 51 is driven upward by the third vertical cylinder 511 to straighten the tilted release paper 400 upward along the inner wall of the middle frame 300 until the release paper 400 is straightened to the upright position; After that, the clamping jaw 52 moves downward under the drive of the second vertical cylinder 521, and clamps the release paper 400 under the drive of the clamping cylinder 522. The toggle rod 51 continues to move upward under the drive of the third vertical cylinder 511 to avoid, and rotates synchronously with the clamping jaw 52 under the drive of the rotating motor 56, and the rotation angle is approximately 3-5°. The traverse motor 55 and the first vertical cylinder 57 then drive the clamping jaw 52 to move horizontally and vertically to rotate the rotating motor 56. The release paper 400 at a certain angle is pulled in a direction away from the assembly hole 301 and then pulled upward, thereby tearing the release paper 400 off the mesh 200; finally, the clamping jaw 52 is driven by the transverse motor 55 to move horizontally to the top of the waste paper collection box 59, and the clamping cylinder 522 drives the two clamping heads 52a of the lower clamping jaw 52 to move backwards to loosen the release paper 400, and blow the torn release paper 400 into the waste paper collection box 59.

[0056] Compared with the prior art, the feeding device 20, the pressure holding device 40 and the film tearing device 50 of the placement machine 100 of the present invention are arranged sequentially along the conveying direction of the belt conveyor line 10, and an assembly device 30 is also arranged between the belt conveyor line 10 and the feeding device 20. The layout of the whole machine is reasonable and compact. Among them, the central frame 200 is automatically conveyed by the belt conveyor line 10, and the mesh 200 is automatically fed by the feeding device 20. Specifically, at least one mesh 200 is attached to the release paper 400 to form a sheet 500, and then each sheet 500 is evenly spaced and pasted between the bottom belt 600 and the top film 700 and rolled into a roll to form a material roll. When in use, the driving mechanism 21 of the feeding device 20 drives the material roll 800 to rotate, so that the stripping table 22 can peel off the sheets 500 on the wound material roll 800 one by one to the receiving table 23 arranged opposite to it, which is convenient for the assembly device 30 to take and deliver the peeled sheets 500. The roll material feeding method is different from the existing sheet material feeding method, which effectively reduces the material change frequency, has high feeding efficiency and accurate positioning, and is suitable for the high efficiency requirements of automated production lines. The assembly device 30 uses the suction head 31 to obliquely attach the sucked mesh 200 to the assembly hole 301 of the middle frame 300, and after attaching, the pressure head 41 of the pressure-maintaining device 40 also obliquely presses the mesh 200 assembled in the assembly hole 301, effectively strengthening the bonding force between the limited and relatively irregular assembly hole 301 and the mesh 200, thereby improving the stability of the assembly, and effectively preventing the mesh 200 from shifting when the film-tearing device 60 tears off the release paper 400. When tearing the film, the film-tearing device 60 also straightens the release paper 400 of the fallen sheet 500 through the material-moving rod 61, and clamps the release paper 400 through the clamping claw 62 and drives the clamped release paper 400 to rotate and move, so as to tear the release paper 400 from the mesh 200. The overall structure of this machine is simple, and it can realize automatic loading and assembly of the middle frame 300 and the mesh 200. During the mounting, pressure holding and film tearing processes, there is no need to tilt the middle frame 300, which effectively simplifies the structure. It can also realize the peeling, mounting, pressure holding and film tearing operations of multiple meshes 200 each time, with high assembly precision and efficiency.

[0057] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A mounting machine for mounting mesh into the mounting hole of the middle frame of a mobile phone, characterized in that: At least one mesh is attached to the release paper to form a sheet, and multiple sheets are attached between the bottom belt and the top film at equal intervals and are rolled into a roll to form a roll. The mounting machine includes a belt conveyor arranged on the machine table, a feeding device, a pressure holding device and a film tearing device arranged in sequence along the conveying direction of the belt conveyor on the machine table, and an assembling device arranged between the belt conveyor and the feeding device; the belt conveyor is used to sequentially transfer the middle frame through the feeding device, the pressure holding device and the film tearing device, and the feeding device includes a driving mechanism and a stripping table and a receiving table arranged opposite to each other. The driving mechanism is used to drive the material roll to rotate, so that the stripping table can peel off the sheets on the wound material roll one by one to the receiving table, the assembling device sucks the sheets on the receiving table through a suction head, and obliquely attaches the mesh on the sheets to the assembly hole of the middle frame, the pressure head of the pressure maintaining device presses the mesh in the assembly hole at an angle, and the film tearing device straightens the release paper of the tilted sheet through the material removing rod, and clamps the release paper through the clamping claws and drives the clamped release paper to rotate and move, so as to tear the release paper from the mesh.

2. The placement machine according to claim 1, characterized in that The inclination angle of the suction head during assembly and the inclination angle of the pressure head during pressure maintenance both correspond to the inclination angle of the assembly hole.

3. The placement machine according to claim 1, characterized in that The mounting machine also includes a top camera arranged above the receiving table, a side camera arranged on the belt conveyor line, and a bottom camera arranged between the belt conveyor line and the assembly device. The top camera is used to identify the position coordinates of the sheet material on the receiving table, the side camera is used to identify the position coordinates of the assembly hole, and the bottom camera is used to identify the position coordinates of the mesh sucked by the suction head.

4. The placement machine according to claim 1, characterized in that The side camera and the bottom camera are both arranged on the platform in an inclined manner, and the inclination angles correspond to the inclination angles of the assembly holes.

5. The placement machine according to claim 1, characterized in that: The mounting machine further comprises a detection device arranged at the rear side of the film tearing device along the conveying direction of the belt conveyor line, and the detection device detects the mounting accuracy of the mesh from both inside and outside sides through two detection cameras.

6. The placement machine according to claim 1, characterized in that The feeding device also includes a base with at least one placement position, and also includes a top film disk for top film winding, a material roll disk for material roll loading and a bottom tape disk for bottom tape winding, which are arranged at the relatively rear side end of the base. The driving motor of the driving mechanism is respectively connected to the top film disk, the material roll disk and the bottom tape disk to drive the three to rotate. The stripping table and the connecting table are arranged at the relatively front side ends of the base. The front side end of the stripping table has a stripping portion with a flat upper surface and an inclined lower surface. The top film at the starting end of the material roll loaded on the material roll disk is wound around the top film disk, and the bottom tape at the starting end of the material roll is wound around the stripping table and then connected to the bottom tape disk. Each sheet on the bottom tape is peeled off one by one from the bottom tape under the traction force of the driving motor and the thrust force of the stripping portion, and is pushed to the connecting table.

7. The placement machine according to claim 1, characterized in that: The assembly device also includes a six-axis robot that drives the suction head to move back and forth between the receiving platform and the belt conveyor line. The suction head includes a mounting seat connected to the output end of the six-axis robot, a pull-back cylinder installed at the relatively upper end of the mounting seat, a vacuum adsorption plate connected to the output end of the pull-back cylinder, and at least one vacuum suction nozzle installed at the relatively lower end of the mounting seat. The adsorption surface of the vacuum suction nozzle is smaller than the adsorption surface of the vacuum adsorption plate, and the number of the vacuum suction nozzles corresponds to the number of mesh on the release paper. The vacuum adsorption plate and the vacuum suction nozzle adsorb the release paper and the mesh respectively.

8. The placement machine according to claim 1, characterized in that: The pressure-maintaining device also includes a support frame installed on the machine platform, a transverse motor installed on the support frame, a vertical motor connected to the output end of the transverse motor, a cantilever arm connected to the output end of the vertical motor, a placement plate installed obliquely on the cantilever arm, a sliding plate slidably arranged on the relatively front end of the placement plate, and a pressure sensor installed at the relatively rear end of the placement plate, a spring is connected between the relatively rear end of the sliding plate and the pressure sensor, and the relatively front end of the sliding plate is arranged with the pressure head corresponding to the number of mesh yarns on the release paper, and the transverse motor and the longitudinal motor are used to drive the pressure head to move along the transverse and vertical straight lines respectively.

9. The placement machine according to claim 1, characterized in that: The film tearing device also includes a support seat installed on the machine platform, a longitudinal motor installed on the support seat, a transverse motor connected to the output end of the longitudinal motor, a rotary motor connected to the output end of the transverse motor, a first vertical cylinder connected to the output end of the rotary motor, a positioning frame connected to the output end of the first vertical cylinder, a second vertical cylinder and a third vertical cylinder installed at two opposite sides of the positioning frame at intervals, and a clamping cylinder connected to the output end of the second vertical cylinder, the clamping claw and the toggle rod are respectively connected to the output ends of the clamping cylinder and the third vertical cylinder, the clamping claw and the toggle rod are driven by the longitudinal motor, the transverse motor and the first vertical cylinder to move in the longitudinal, transverse and vertical directions, rotate under the drive of the rotary motor, and also move in the vertical direction under the drive of the second vertical cylinder and the third vertical cylinder, respectively, and the clamping cylinder is used to drive the clamping claw to clamp or release the release paper.

10. The placement machine according to claim 9, characterized in that The clamping jaws include two symmetrically arranged clamping heads, a plurality of vertically arranged convex ribs are evenly distributed on the clamping surfaces of the clamping heads, and an air outlet is also arranged on the clamping surfaces of the clamping heads for blowing the torn release paper away from the clamping heads.

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