An automatic precision polishing and grinding device for mobile phone mid-frames

Abstract

This invention discloses an automatic fine-repairing and polishing device for mobile phone mid-frames. The frame is equipped with a mid-frame conveying assembly and an automatic polishing assembly. The mid-frame conveying assembly includes a feeding conveyor, a front-end clamping conveyor, a turning conveyor, a rear-end clamping conveyor, and a discharging conveyor belt. The front-end and rear-end clamping conveyors are synchronous belt conveyors. The synchronous belt conveyor includes a lower fixed frame and an upper movable frame. The lower fixed frame is equipped with a first synchronous belt mechanism, and the upper movable frame is equipped with a second synchronous belt mechanism. The conveying surface of the feeding synchronous belts of each synchronous belt mechanism is covered with a soft rubber layer, and the synchronous belt conveyor also includes a tension adjustment mechanism. The automatic polishing assembly includes a left short-side polishing mechanism, a right short-side polishing mechanism, a left long-side polishing mechanism, and a right long-side polishing mechanism. This invention can automatically and efficiently complete the fine-repairing and polishing of the edges of mobile phone mid-frames, possessing the advantages of novel structural design, high automation, and high work efficiency.

Description

Technical Field

[0001] This invention relates to the field of automation equipment technology, and in particular to an automatic fine-repair and polishing device for mobile phone mid-frames. Background Technology

[0002] The phone frame has two opposite short sides and two opposite long sides. During the manufacturing process, the top and bottom edges of each short side and each long side need to be sanded to ensure the surface quality of the phone frame. Traditionally, sanding the edges of the phone frame is done manually, with workers using hand-held sandpaper to sand the edges.

[0003] Among them, the Chinese invention patent application with patent number 202211075453.1 and patent title "A Production Equipment and Process for a Mobile Phone Case Mid-Frame" specifically discloses the following technical solution: A production equipment for a mobile phone case mid-frame includes a processing table, a conveyor belt installed at the top center of the processing table, clamping seats installed at equal intervals on the upper part of the conveyor belt, and connecting frames symmetrically installed on both sides of the upper part of the processing table. Each connecting frame is respectively equipped with a three-dimensional transmission assembly composed of a first transmission frame, a second transmission frame, and a third transmission frame. Each of the third transmission frames is equipped with a first electric clamp. A fixed frame is installed on the upper part of the processing table near the conveyor belt. A fourth transmission frame is installed in front of the fixed frame. A fourth sliding seat is slidably connected to the front of the fourth transmission frame. A grinding motor is installed in front of the fourth sliding seat. A rotating disk is installed on the output shaft of the grinding motor. A connecting disk is set at the bottom of the rotating disk. A grinding wheel is installed at the bottom of the connecting disk. A flipping seat is installed on the upper part of the processing table near the fixed frame. Visual sensing cameras are installed at the positions of the symmetrical flipping seats and fixed frames on the upper part of the processing table.

[0004] It should be noted that the aforementioned equipment and processes for producing mobile phone case frames are not efficient and fast enough to complete the grinding and processing of the edges of the mobile phone frame. Therefore, in order to meet the grinding and processing requirements of the edges of the mobile phone frame, it is necessary to design and develop an automated device to achieve automatic grinding and processing of the edges of the mobile phone frame. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic fine-repair and polishing device for mobile phone mid-frames to address the shortcomings of existing technologies. This device can automatically and efficiently complete the fine-repair and polishing of each edge of the mobile phone mid-frame. It features a novel structural design, a high degree of automation, and high work efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0007] An automatic fine-repair and polishing device for mobile phone mid-frame includes a frame, on which a mid-frame conveying assembly and an automatic polishing assembly are mounted;

[0008] The mid-frame conveyor assembly includes a feeding conveyor assembly, a front clamping conveyor assembly, a turning conveyor assembly, a rear clamping conveyor assembly, and an unloading conveyor belt, arranged sequentially from front to back along the conveying direction of the mobile phone mid-frame. The front clamping conveyor assembly and the rear clamping conveyor assembly are synchronous belt conveyor assemblies. The feeding conveyor assembly is used to laterally convey the mobile phone mid-frame to the front clamping conveyor assembly, and the turning conveyor assembly is used to turn and adjust the mobile phone mid-frame to the longitudinal direction and convey the longitudinal mobile phone mid-frame to the rear clamping conveyor assembly.

[0009] The synchronous belt conveyor assembly includes a lower fixed frame mounted on the machine frame, and a first synchronous belt mechanism mounted on the lower fixed frame. The first synchronous belt mechanism includes a first driving synchronous belt pulley, a first driven synchronous belt pulley, and a first feeding synchronous belt wound between the first driving synchronous belt pulley and the first driven synchronous belt pulley. An upper movable frame is mounted above the lower fixed frame, and a second synchronous belt mechanism that operates synchronously with the first synchronous belt mechanism is mounted on the upper movable frame. The second synchronous belt mechanism includes a second driving synchronous belt pulley, a second driven synchronous belt pulley, and a second feeding synchronous belt wound between the second driving synchronous belt pulley and the second driven synchronous belt pulley. The conveying surfaces of the first feeding synchronous belt and the second feeding synchronous belt are respectively covered with a soft rubber layer, and the synchronous belt conveyor assembly also includes a tension adjustment mechanism for adjusting the height position of the upper movable frame.

[0010] The automatic polishing assembly includes several left-side short-edge polishing mechanisms located on the left side of the front clamping and conveying assembly, several right-side short-edge polishing mechanisms located on the right side of the front clamping and conveying assembly, several left-side long-edge polishing mechanisms located on the left side of the rear clamping and conveying assembly, and several right-side long-edge polishing mechanisms located on the right side of the rear clamping and conveying assembly; the several left-side short-edge polishing mechanisms include one for polishing the lower edge of the short edge of the phone's mid-frame and one for polishing the upper edge of the short edge of the phone's mid-frame; the several right-side short-edge polishing mechanisms include one for polishing the lower edge of the short edge of the phone's mid-frame. The device includes a side polishing mechanism and a right short-side polishing mechanism for polishing the upper edge of the short side of the phone frame; a plurality of left long-side polishing mechanisms, including a left long-side polishing mechanism for polishing the lower edge of the long side of the phone frame and a left long-side polishing mechanism for polishing the upper edge of the long side of the phone frame; a plurality of right long-side polishing mechanisms, including a right long-side polishing mechanism for polishing the lower edge of the long side of the phone frame and a right long-side polishing mechanism for polishing the upper edge of the long side of the phone frame; each left short-side polishing mechanism, each right short-side polishing mechanism, each left long-side polishing mechanism, and each right long-side polishing mechanism is a sandpaper polishing head assembly.

[0011] The sandpaper grinding head assembly includes a base that is fastened to the frame. A translational movable seat is horizontally slidably mounted on the upper end of the base. A translational drive cylinder is mounted on the base corresponding to the translational movable seat. The piston rod extension of the translational drive cylinder is connected to the translational movable seat. A fine-tuning movable seat is mounted on the upper end of the translational movable seat. A fine-tuning drive mechanism for driving the fine-tuning movable seat to make fine adjustments relative to the translational movable seat is installed between the translational movable seat and the fine-tuning movable seat.

[0012] The sandpaper grinding head assembly also includes an angle adjustment plate, a linear drive module, a sandpaper mounting bracket, and sandpaper. The angle adjustment plate has a shaft, which is rotatably mounted on the upper end of the fine-tuning seat via a bearing. The angle adjustment plate has at least three internally threaded holes arranged in a circular array on the periphery of the shaft, and each internally threaded hole is screwed with a locking screw. The upper end of the fine-tuning seat has an arc-shaped through hole corresponding to each locking screw, and each locking screw passes through the corresponding arc-shaped through hole. The linear drive module is fastened to the angle adjustment plate, the sandpaper mounting bracket is mounted on the drive end of the linear drive module, and the sandpaper is mounted on the sandpaper mounting bracket.

[0013] The fine-tuning drive mechanism includes a fine-tuning drive screw that is rotatably mounted on the translational movable seat via a bearing and extends in the left-right direction. A fine-tuning drive handwheel is installed at one end of the fine-tuning drive screw. A fine-tuning screw nut is fastened to the fine-tuning movable seat, and the fine-tuning screw nut cooperates with the fine-tuning drive screw.

[0014] The upper end of the translational movable seat is equipped with a fine-tuning guide post that extends in a straight line along the left and right direction, and the lower end of the fine-tuning movable seat is equipped with a fine-tuning guide sleeve. The fine-tuning guide post and the fine-tuning guide sleeve cooperate with each other.

[0015] The tension adjustment mechanism includes a tension adjustment bracket that is fastened to the frame and located above the upper movable frame. The upper movable frame is rotatably mounted with a vertically arranged tension adjustment screw via a bearing. The upper end of the tension adjustment screw extends above the tension adjustment bracket, and a tension drive handwheel located above the tension adjustment bracket is fastened to the upper end of the tension adjustment screw. The tension adjustment bracket is screwed with a tension adjustment screw nut corresponding to the tension adjustment screw, and the tension adjustment screw and the tension adjustment screw nut cooperate with each other.

[0016] The upper movable frame is fastened with several tension adjustment guide posts arranged vertically. The tension adjustment bracket is fastened with tension adjustment guide sleeves corresponding to each tension adjustment guide post. Each tension adjustment guide post is inserted into the center hole of the corresponding tension adjustment guide sleeve.

[0017] The first synchronous belt mechanism further includes a first driving shaft and a first driven shaft. The first driving shaft and the first driven shaft are rotatably mounted on the lower fixed frame via bearings. The first driving synchronous belt pulley is mounted on the first driving shaft, and the first driven synchronous belt pulley is mounted on the first driven shaft.

[0018] The second synchronous belt mechanism further includes a second driving shaft and a second driven shaft. The second driving shaft and the second driven shaft are rotatably mounted on the upper movable frame via bearings. The second driving synchronous belt pulley is mounted on the second driving shaft, and the second driven synchronous belt pulley is mounted on the second driven shaft.

[0019] The frame is equipped with a geared drive motor, and the power output shaft of the geared drive motor is connected to the first active rotating shaft and the second active rotating shaft respectively.

[0020] The power output shaft of the speed reduction drive motor is connected to the first active rotating shaft via a coupling. The frame is also equipped with an auxiliary support, and an auxiliary rotating shaft is rotatably mounted on the upper end of the auxiliary support via a bearing. The first active rotating shaft is driven to connect with the auxiliary rotating shaft via a transmission pair, and the auxiliary rotating shaft is also driven to connect with the second active rotating shaft via a transmission pair. The transmission pair is a gear transmission pair or a belt transmission pair.

[0021] The feeding and conveying assembly includes a feeding and conveying bracket mounted on the frame, a feeding and conveying belt mounted on the feeding and conveying bracket, and a middle frame transverse guiding mechanism mounted above the conveying surface of the feeding and conveying belt. During operation, the middle frame of the mobile phone is placed transversely on the conveying surface of the feeding and conveying belt, and the middle frame of the mobile phone, after being guided by the middle frame transverse guiding mechanism, is conveyed to the front clamping and conveying assembly.

[0022] The middle frame lateral guiding mechanism includes a left lateral guiding block and a right lateral guiding block arranged opposite each other and spaced apart, with the left lateral guiding block located on the left end of the right lateral guiding block.

[0023] There is a horizontal guide channel between the left horizontal guide block and the right horizontal guide block for the middle frame of the mobile phone to pass through, and the front end of the horizontal guide channel is flared.

[0024] The left and right lateral guide blocks are respectively installed on the feeding conveyor bracket via the first adjustable bracket.

[0025] The steering and conveying assembly includes a steering and conveying bracket mounted on the frame, a middle conveyor belt mounted on the steering and conveying bracket, a mid-frame longitudinal guiding mechanism and a touch steering mechanism located in front of the mid-frame longitudinal guiding mechanism mounted above the conveying surface of the middle conveyor belt; the touch steering mechanism includes a steering block fastened to the steering and conveying bracket and extending into the conveying surface of the middle conveyor belt; during operation, the horizontally placed mobile phone mid-frame enters the middle conveyor belt, the steering block touches and moves the mobile phone mid-frame to rotate longitudinally, and the vertically placed mobile phone mid-frame is guided by the mid-frame longitudinal guiding mechanism and then conveyed to the rear clamping and conveying assembly.

[0026] The longitudinal guiding mechanism of the middle frame includes a left longitudinal guiding block and a right longitudinal guiding block that are arranged opposite each other and spaced apart. The left longitudinal guiding block is located on the left end of the right longitudinal guiding block.

[0027] There is a vertical guide channel between the left vertical guide block and the right vertical guide block for the mobile phone frame to pass through, and the front end of the vertical guide channel is flared.

[0028] The left longitudinal guide block and the right longitudinal guide block are respectively installed on the steering and conveying bracket via the second adjustable bracket.

[0029] Compared with existing technologies, the present invention has the following advantages: Specifically, during operation, the feeding and conveying assembly laterally conveys the phone frame to the front clamping and conveying assembly. The front clamping and conveying assembly clamps and conveys the phone frame, causing the two short sides of the phone frame to pass through the left and right short side grinding mechanisms to complete the edge grinding of the short sides of the phone frame. After the short side grinding is completed, the phone frame is turned by the turning and conveying assembly and then longitudinally conveyed to the rear clamping and conveying assembly. The rear clamping and conveying assembly clamps and conveys the phone frame, causing the two long sides of the phone frame to pass through the left and right long side grinding mechanisms to complete the edge grinding of the long sides of the phone frame. Therefore, the automatic fine-finishing and polishing equipment for phone frames of the present invention can automatically and efficiently complete the fine-finishing and polishing of each edge of the phone frame. In other words, this automatic fine-finishing and polishing equipment for phone frames has the advantages of novel structural design, high degree of automation, and high working efficiency. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0033] Figure 3This is a structural schematic diagram from another perspective of the present invention.

[0034] Figure 4 This is a partial structural diagram of the present invention.

[0035] Figure 5 This is a partial structural schematic diagram from another perspective of the present invention.

[0036] Figure 6 This is a schematic diagram of the feeding and conveying assembly of the present invention.

[0037] Figure 7 This is a schematic diagram of the synchronous belt conveyor assembly of the present invention.

[0038] Figure 8 This is a schematic diagram of the synchronous belt conveyor assembly of the present invention from another perspective.

[0039] Figure 9 for Figure 8 A magnified view of a portion of the image.

[0040] Figure 10 This is a partial cross-sectional schematic diagram of the synchronous belt conveyor assembly of the present invention.

[0041] Figure 11 This is a schematic diagram of the sandpaper grinding head assembly of the present invention.

[0042] Figure 12 This is a structural schematic diagram of the sandpaper grinding head assembly of the present invention from another perspective.

[0043] Figure 13 This is a schematic diagram of the steering and conveying assembly of the present invention.

[0044] exist Figures 1 to 13 This includes:

[0045] 1-Frame; 2-Feeding conveyor assembly; 21-Feeding conveyor bracket; 22-Feeding conveyor belt; 23-Middle frame transverse guiding mechanism; 231-Left transverse guiding block; 232-Right transverse guiding block; 233-First adjustable bracket; 3-Front end clamping conveyor assembly; 4-Diverting conveyor assembly; 41-Diverting conveyor bracket; 42-Middle conveyor belt; 43-Middle frame longitudinal guiding mechanism; 431-Left longitudinal guiding block; 432-Right longitudinal guiding block; 433-Second adjustable bracket; 44-Diverting lever; 5- 6-Rear end clamping conveyor assembly; 71-Unloading conveyor belt; 72-Lower fixed frame; 72-First synchronous belt mechanism; 721-First driving synchronous belt pulley; 722-First driven synchronous belt pulley; 723-First feeding synchronous belt; 724-First driving shaft; 725-First driven shaft; 73-Upper movable frame; 74-Second synchronous belt mechanism; 741-Second driving synchronous belt pulley; 742-Second driven synchronous belt pulley; 743-Second feeding synchronous belt; 744-Second driving shaft; 745-Second driven shaft; 751-Loosening 752-Tightening adjustment bracket; 753-Tightening adjustment screw; 754-Tightening drive handwheel; 755-Adjustment drive plate; 756-Tightening adjustment guide post; 757-Tightening adjustment guide sleeve; 76-Soft rubber layer; 771-Reduction drive motor; 772-Coupling; 773-Auxiliary bracket; 774-Auxiliary rotating shaft; 775-Transmission pair; 81-Left short side grinding assembly; 82-Right short side grinding assembly; 83-Left long side grinding assembly; 84-Right long side grinding assembly; 851-Base; 85 2-Transfer movable seat; 853-Transfer drive cylinder; 854-Fine-adjustment movable seat; 8541-Arc-shaped through hole; 855-Fine-adjustment drive mechanism; 8551-Fine-adjustment drive screw; 8552-Fine-adjustment drive handwheel; 8553-Fine-adjustment screw nut; 8554-Fine-adjustment guide post; 8555-Fine-adjustment guide sleeve; 856-Angle adjustment plate; 8561-Shaft; 857-Linear drive module; 858-Sandpaper mounting bracket; 859-Grinding sandpaper; 8510-Locking screw; 91-Dust suction hood; 92-Exhaust dust collection device. Detailed Implementation

[0046] The present invention will now be described in conjunction with specific embodiments.

[0047] Example 1, as Figures 1 to 3 As shown, an automatic fine-repair and polishing device for mobile phone mid-frame includes a frame 1, on which a mid-frame conveying assembly and an automatic polishing assembly are mounted.

[0048] Among them, such as Figures 1 to 3As shown, the mid-frame conveying assembly includes a feeding conveying component 2, a front clamping conveying component 3, a turning conveying component 4, a rear clamping conveying component 5, and a discharging conveyor belt 6 arranged sequentially from front to back along the conveying direction of the mobile phone mid-frame. The front clamping conveying component 3 and the rear clamping conveying component 5 are synchronous belt conveying components. The feeding conveying component 2 is used to convey the mobile phone mid-frame laterally to the front clamping conveying component 3, and the turning conveying component 4 is used to turn and adjust the mobile phone mid-frame to the longitudinal direction and convey the longitudinal mobile phone mid-frame to the rear clamping conveying component 5.

[0049] Furthermore, such as Figures 7 to 10 As shown, the synchronous belt conveyor assembly includes a lower fixed frame 71 mounted on the frame 1. The lower fixed frame 71 is equipped with a first synchronous belt mechanism 72, which includes a first driving synchronous belt pulley 721, a first driven synchronous belt pulley 722, and a first feeding synchronous belt 723 wound between the first driving synchronous belt pulley 721 and the first driven synchronous belt pulley 722. An upper movable frame 73 is mounted above the lower fixed frame 71. The upper movable frame 73 is equipped with a second synchronous belt mechanism 74 that operates synchronously with the first synchronous belt mechanism 72. The second synchronous belt mechanism 74 includes a second driving synchronous belt pulley 741, a second driven synchronous belt pulley 742, and a second feeding synchronous belt 743 wound between the second driving synchronous belt pulley 741 and the second driven synchronous belt pulley 742. The conveying surfaces of the first feeding synchronous belt 723 and the second feeding synchronous belt 743 are respectively covered with a soft rubber layer 76. The synchronous belt conveyor assembly also includes a tension adjustment mechanism for adjusting the height position of the upper movable frame 73.

[0050] Furthermore, such as Figures 1 to 5 As shown, the automatic polishing assembly includes several left-side short-edge polishing mechanisms located on the left side of the front clamping and conveying assembly 3, several right-side short-edge polishing mechanisms located on the right side of the front clamping and conveying assembly 3, several left-side long-edge polishing mechanisms located on the left side of the rear clamping and conveying assembly 5, and several right-side long-edge polishing mechanisms located on the right side of the rear clamping and conveying assembly 5; the several left-side short-edge polishing mechanisms include one for polishing the lower edge of the short edge of the phone's mid-frame and one for polishing the upper edge of the short edge of the phone's mid-frame; the several right-side short-edge polishing mechanisms include one for polishing the lower edge of the short edge of the phone's mid-frame... The system includes a right-side short-edge grinding mechanism and a right-side short-edge grinding mechanism for grinding the upper edge of the short edge of the phone's mid-frame; a plurality of left-side long-edge grinding mechanisms, including a left-side long-edge grinding mechanism for grinding the lower edge of the long edge of the phone's mid-frame and a left-side long-edge grinding mechanism for grinding the upper edge of the long edge of the phone's mid-frame; a plurality of right-side long-edge grinding mechanisms, including a right-side long-edge grinding mechanism for grinding the lower edge of the long edge of the phone's mid-frame and a right-side long-edge grinding mechanism for grinding the upper edge of the long edge of the phone's mid-frame; each left-side short-edge grinding mechanism, each right-side short-edge grinding mechanism, each left-side long-edge grinding mechanism, and each right-side long-edge grinding mechanism is a sandpaper grinding head assembly.

[0051] It should be noted that, as Figures 1 to 5 As shown, the frame 1 is equipped with a dust suction hood 91 below the sanding position of each sandpaper grinding head assembly, and each dust suction hood 91 is connected to the exhaust dust suction device 92.

[0052] It should be noted that, for the synchronous belt conveyor assembly of this embodiment, the first synchronous belt mechanism 72 further includes a first driving shaft 724 and a first driven shaft 725. The first driving shaft 724 and the first driven shaft 725 are rotatably mounted on the lower fixed frame 71 via bearings. The first driving synchronous belt pulley 721 is mounted on the first driving shaft 724, and the first driven synchronous belt pulley 722 is mounted on the first driven shaft 725. Similarly, the second synchronous belt mechanism 74 further includes a second driving shaft 744 and a second driven shaft 745. The rotating shafts 745 are rotatably mounted on the upper movable frame 73 via bearings. The second active synchronous pulley 741 is mounted on the second active rotating shaft 744, and the second driven synchronous pulley 742 is mounted on the second driven rotating shaft 745. The frame 1 is equipped with a reduction drive motor 771, and the power output shaft of the reduction drive motor 771 is driven and connected to the first active rotating shaft 724 and the second active rotating shaft 744 respectively. During operation, the reduction drive motor 771 drives the first active rotating shaft 724 and the second rotating shaft to rotate synchronously, thereby causing the first synchronous belt mechanism 72 and the second synchronous belt mechanism 74 to move synchronously.

[0053] In this embodiment, during the process of conveying the mobile phone frame from front to back using the front clamping and conveying component 3 and the rear clamping and conveying component 5, the mobile phone frame enters the gap between the first feeding synchronous belt 723 and the second feeding synchronous belt 743. The first feeding synchronous belt 723 contacts and presses against the mobile phone frame through the soft rubber layer 76, and the second feeding synchronous belt 743 also contacts and presses against the mobile phone frame through the soft rubber layer 76. That is, the mobile phone frame is clamped by the first feeding synchronous belt 723 and the second feeding synchronous belt 743. During the synchronous movement of the first feeding synchronous belt 723 and the second feeding synchronous belt 743, the mobile phone frame moves synchronously with the first feeding synchronous belt 723 and the second feeding synchronous belt 743, thereby realizing the conveying and movement of the mobile phone frame. It should be noted that, since the first feeding synchronous belt 723 and the second feeding synchronous belt 743 of this embodiment contact and press against the mobile phone frame through the soft rubber layer 76, the clamping force of the soft rubber layer 76 causes the mobile phone frame to move synchronously with the first feeding synchronous belt 723 and the second feeding synchronous belt 743; the soft rubber layer 76 can effectively prevent the surface of the mobile phone frame from being scratched.

[0054] Furthermore, since the mobile phone frame relies on the clamping force of the soft rubber layer 76 to achieve conveying and movement, during operation, the operator can adjust the position of the upper movable frame 73 and the second synchronous belt mechanism 74 by adjusting the tension adjustment mechanism, thereby adjusting the gap between the first feeding synchronous belt 723 and the second feeding synchronous belt 743 to achieve adaptive adjustment of the clamping force.

[0055] The following is a detailed description of the automatic fine-repair and polishing equipment for the mobile phone mid-frame in Embodiment 1, with specific action procedures included:

[0056] Step a: The staff places the mobile phone frame horizontally on the feeding conveyor component 2, and the feeding conveyor component 2 transports the mobile phone frame horizontally to the front clamping conveyor component 3;

[0057] Step b: When the horizontally placed mobile phone frame enters the gap between the first feeding synchronous belt 723 and the second feeding synchronous belt 743 of the front clamping conveyor assembly 3, the first feeding synchronous belt 723 and the second feeding synchronous belt 743 cooperate to clamp and move the horizontal mobile phone frame. During this process, the left short side of the mobile phone frame extends to the left side of the front clamping conveyor assembly 3, and the right short side of the mobile phone frame extends to the right side of the front clamping conveyor assembly 3.

[0058] Step c: The front clamping and conveying component 3 clamps the horizontally arranged mobile phone frame and moves the mobile phone frame from front to back. During this process, the left short side of the mobile phone frame will pass through several left short side grinding mechanisms, and the right short side of the mobile phone frame will pass through several right short side grinding mechanisms. During this process, one left short side grinding mechanism will grind the upper edge of the left short side of the mobile phone frame, one left short side grinding mechanism will return to the lower edge of the left short side of the mobile phone frame for grinding, one right short side grinding mechanism will grind the upper edge of the right short side of the mobile phone frame, and one right short side grinding mechanism will return to the lower edge of the right short side of the mobile phone frame for grinding. That is, as the front clamping and conveying component 3 clamps and conveys the horizontal mobile phone frame from front to back, the automatic grinding assembly completes the short side grinding process of the mobile phone frame.

[0059] Step d: The horizontal mobile phone frame delivered by the front clamping and conveying component 3 enters the turning and conveying component 4. The turning and conveying component 4 is used to turn and adjust the mobile phone frame to the vertical direction and convey the vertical mobile phone frame to the rear clamping and conveying component 5.

[0060] Step e: When the vertically placed mobile phone frame enters the gap between the first feeding synchronous belt 723 and the second feeding synchronous belt 743 of the rear clamping and conveying assembly 5, the first feeding synchronous belt 723 and the second feeding synchronous belt 743 cooperate to clamp and move the vertically placed mobile phone frame. During this process, the left long side of the mobile phone frame extends to the left side of the rear clamping and conveying assembly 5, and the right long side of the mobile phone frame extends to the right side of the rear clamping and conveying assembly 5.

[0061] Step f: The rear clamping and conveying assembly 5 clamps the longitudinally arranged mobile phone frame and moves the mobile phone frame from front to back. During this process, the left long side of the mobile phone frame will pass through several left long side grinding mechanisms, and the right long side of the mobile phone frame will pass through several right long side grinding mechanisms. During this process, one left long side grinding mechanism will grind the upper edge of the left long side of the mobile phone frame, one left long side grinding mechanism will grind the lower edge of the left long side of the mobile phone frame, one right long side grinding mechanism will grind the upper edge of the right long side of the mobile phone frame, and one right long side grinding mechanism will grind the lower edge of the right long side of the mobile phone frame. That is, as the rear clamping and conveying assembly 5 clamps and conveys the longitudinal mobile phone frame from front to back, the automatic grinding assembly completes the grinding process of the long side of the mobile phone frame.

[0062] Step g: After the long side of the mobile phone frame is polished, the rear clamping and conveying component 5 sends the polished mobile phone frame into the unloading conveyor belt 6, and the unloading conveyor belt 6 sends the polished mobile phone frame out.

[0063] It should be further pointed out that when each sandpaper grinding head assembly grinds the mobile phone frame, the dust generated during grinding is sucked into the corresponding dust suction hood 91 by the suction device 92.

[0064] Furthermore, the plurality of left short-side polishing mechanisms include at least two alternating actions for polishing the lower edge of the short side of the phone frame and at least two alternating actions for polishing the upper edge of the short side of the phone frame; the plurality of right short-side polishing mechanisms include at least two alternating actions for polishing the lower edge of the short side of the phone frame and at least two alternating actions for polishing the upper edge of the short side of the phone frame; the plurality of left long-side polishing mechanisms include at least two alternating actions for polishing the lower edge of the long side of the phone frame and at least two alternating actions for polishing the upper edge of the long side of the phone frame; the plurality of right long-side polishing mechanisms include at least two alternating actions for polishing the lower edge of the long side of the phone frame and at least two alternating actions for polishing the upper edge of the long side of the phone frame; and the plurality of right long-side polishing mechanisms include at least two alternating actions for polishing the lower edge of the long side of the phone frame and at least two alternating actions for polishing the upper edge of the long side of the phone frame. The purpose of setting up multiple grinding mechanisms with the same function and alternating actions is to facilitate maintenance operations without stopping the machine.

[0065] In summary, through the above structural design, the automatic fine-repair and polishing equipment for mobile phone mid-frames in this embodiment can automatically and efficiently complete the fine-repair and polishing processing of each edge of the mobile phone mid-frame. That is, the automatic fine-repair and polishing equipment for mobile phone mid-frames has the advantages of novel structural design, high degree of automation, and high work efficiency.

[0066] Example 2, as Figure 11 and Figure 12 As shown, the difference between this embodiment 2 and embodiment 1 is that: the sandpaper grinding head assembly includes a base 851 that is fastened to the frame 1, a translational movable seat 852 that is horizontally slidably mounted on the upper end of the base 851, a translational drive cylinder 853 that is mounted on the base 851 corresponding to the translational movable seat 852, and the outer end of the piston rod of the translational drive cylinder 853 that is connected to the translational movable seat 852; a fine-tuning movable seat 854 is mounted on the upper end of the translational movable seat 852, and a fine-tuning drive mechanism 855 for driving the fine-tuning movable seat 854 to move finely relative to the translational movable seat 852 is installed between the translational movable seat 852 and the fine-tuning movable seat 854.

[0067] The sandpaper grinding head assembly also includes an angle adjustment plate 856, a linear drive module 857, a sandpaper mounting bracket 858, and sandpaper 859. The angle adjustment plate 856 has a shaft portion 8561, which is rotatably mounted on the upper end of a fine-tuning movable seat 854 via bearings. The angle adjustment plate 856 has at least three internally threaded holes arranged in a circular array on the periphery of the shaft portion 8561, and each internally threaded hole is screwed with a locking screw 8510. The upper end of the fine-tuning movable seat 854 has an arc-shaped through hole 8541 corresponding to each locking screw 8510, and each locking screw 8510 passes through the corresponding arc-shaped through hole 8541. The linear drive module 857 is fastened to the angle adjustment plate 856, the sandpaper mounting bracket 858 is mounted on the drive end of the linear drive module 857, and the sandpaper 859 is mounted on the sandpaper mounting bracket 858.

[0068] When using the sandpaper polishing head assembly of this embodiment to polish the edges of the mobile phone frame, the translation drive cylinder 853 first drives the translation movable seat 852 to move towards the mobile phone frame side and moves the translation movable seat 852 to the working position; after the translation movable seat 852 moves to the working position, the linear drive module 857 is activated, and the linear drive module 857 drives the sandpaper mounting bracket 858 and the sandpaper 859 to reciprocate linearly, thereby making the sandpaper 859 polish the edges of the mobile phone frame.

[0069] It should be emphasized that, for the fine-tuning drive mechanism 855 installed between the fine-tuning movable seat 854 and the translational movable seat 852, during operation, the operator can adjust the relative position between the fine-tuning movable seat 854 and the translational movable seat 852 to adaptively adjust the relative position between the sanding paper 859 and the mobile phone frame during the polishing operation, so that the sanding paper 859 can stably polish the mobile phone frame.

[0070] Furthermore, the angle adjustment plate 856 is mounted on the upper end of the fine-tuning movable seat 854 via its shaft 8561. When the angle of the angle adjustment plate 856 needs to be adjusted, the operator only needs to loosen the locking screws 8510, then rotate the angle adjustment plate 856 to the desired position around the shaft 8561, and then tighten the locking screws 8510 to keep the angle adjustment plate 856 and the fine-tuning movable seat firmly in place. Since the angle adjustment plate 856 can be adjusted relative to the fine-tuning movable seat 854, the sandpaper grinding head assembly of this embodiment can adjust the angle of the sandpaper 859 to meet the requirements of different angle grinding operations, and can be effectively applied to the grinding of the edge of the mobile phone frame.

[0071] Therefore, the sandpaper grinding head assembly of this embodiment has the advantage of good adjustability and can be effectively applied to the grinding of the edge of the mobile phone frame.

[0072] Example 3, as Figure 11 and Figure 12 As shown, the difference between this embodiment three and embodiment two is that: the fine-tuning drive mechanism 855 includes a fine-tuning drive screw 8551 that is rotatably mounted on the translational movable seat 852 via a bearing and extends in the left-right direction, and a fine-tuning drive handwheel 8552 is installed at one end of the fine-tuning drive screw 8551; a fine-tuning screw nut 8553 is fastened to the fine-tuning movable seat 854, and the fine-tuning screw nut 8553 cooperates with the fine-tuning drive screw 8551.

[0073] The upper end of the translational movable seat 852 is equipped with a fine-tuning guide post 8554 that extends in a straight line along the left and right direction, and the lower end of the fine-tuning movable seat 854 is equipped with a fine-tuning guide sleeve 8555. The fine-tuning guide post 8554 and the fine-tuning guide sleeve 8555 cooperate with each other.

[0074] When adjusting the position of the fine-tuning movable seat 854 through the fine-tuning drive mechanism 855, the operator can rotate the fine-tuning drive handwheel 8552 to rotate the fine-tuning drive screw 8551. The rotating fine-tuning drive screw 8551 drives the fine-tuning screw nut 8553 to move left and right relative to each other, thereby causing the fine-tuning movable seat 854 to move left and right relative to the translational movable seat 852 for fine-tuning, so as to adaptively adjust the relative position between the sanding paper 859 and the mobile phone frame during the polishing operation.

[0075] Example 4, as Figure 7 and Figure 8 As shown, the difference between this embodiment four and embodiment one is that: the tension adjustment mechanism includes a tension adjustment bracket 751 that is fastened to the frame 1 and located above the upper movable frame 73. The upper movable frame 73 is rotatably mounted with a vertically arranged tension adjustment screw 752 via a bearing. The upper end of the tension adjustment screw 752 extends above the tension adjustment bracket 751, and a tension drive handwheel 754 located above the tension adjustment bracket 751 is fastened to the upper end of the tension adjustment screw 752. The tension adjustment bracket 751 is screwed with a tension screw nut 753 corresponding to the tension adjustment screw 752, and the tension adjustment screw 752 and the tension screw nut 753 cooperate with each other.

[0076] The upper movable frame 73 is fastened with several tension adjustment guide posts 756 arranged vertically. The tension adjustment bracket 751 is fastened with tension adjustment guide sleeves 757 corresponding to each tension adjustment guide post 756. Each tension adjustment guide post 756 is inserted into the center hole of the corresponding tension adjustment guide sleeve 757.

[0077] When adjusting the clamping force of the mobile phone frame through the tension adjustment mechanism, the operator can rotate the tension adjustment screw 752 by rotating the tension drive handwheel 754 to move the tension screw nut 753 up and down to adjust its position. This allows the upper movable frame 73 and the second synchronous belt mechanism 74 to move up and down to adjust their positions, thereby adjusting the gap between the first feeding synchronous belt 723 and the second feeding synchronous belt 743 to achieve adaptive adjustment of the clamping force.

[0078] The guide pair structure consisting of tension adjustment guide post 756 and tension adjustment guide sleeve 757 enables the upper movable frame 73 to perform stable and accurate lifting and lowering movement adjustment.

[0079] Example 5, as Figures 7 to 9 As shown, the difference between this embodiment 5 and embodiment 4 is that: the power output shaft of the reduction drive motor 771 is connected to the first active rotating shaft 724 through a coupling 772; the frame 1 is also equipped with an auxiliary bracket 773, and the upper end of the auxiliary bracket 773 is rotatably mounted with an auxiliary rotating shaft 774 through a bearing. The first active rotating shaft 724 is driven to connect with the auxiliary rotating shaft 774 through a transmission pair 775, and the auxiliary rotating shaft 774 is also driven to connect with the second active rotating shaft 744 through a transmission pair 775. The transmission pair 775 is a gear transmission pair or a belt transmission pair.

[0080] During the synchronous operation of the first synchronous belt mechanism 72 and the second synchronous belt mechanism 74 driven by the geared drive motor 771, the geared drive motor 771 starts, and the power output shaft of the geared drive motor 771 drives the first active rotating shaft 724 to rotate through the coupling 772. The first active rotating shaft 724 drives the auxiliary rotating shaft 774 to rotate through the transmission pair 775. The rotating auxiliary rotating shaft 774 then drives the second active rotating shaft 744 to rotate through another transmission pair 775, thereby making the first active rotating shaft 724 and the second active rotating shaft 744 rotate synchronously, so as to realize the synchronous operation of the first synchronous belt mechanism 72 and the second synchronous belt mechanism 74, and make the first feeding synchronous belt 723 and the second feeding synchronous belt 743 move synchronously, thereby ensuring the stability of the clamping and conveying of the mobile phone frame.

[0081] Example 6, as Figure 6 As shown, the difference between this embodiment six and embodiment one is that the feeding and conveying assembly 2 includes a feeding and conveying bracket 21 mounted on the frame 1, the feeding and conveying bracket 21 is equipped with a feeding conveyor belt 22, and the feeding and conveying bracket 21 is equipped with a middle frame transverse guiding mechanism 23 above the conveying surface of the feeding conveyor belt 22; during operation, the mobile phone middle frame is placed transversely on the conveying surface of the feeding conveyor belt 22, and the mobile phone middle frame after being guided by the middle frame transverse guiding mechanism 23 is conveyed to the front clamping and conveying assembly 3.

[0082] Specifically, the mid-frame lateral guiding mechanism 23 includes a left lateral guiding block 231 and a right lateral guiding block 232 arranged opposite each other and spaced apart. The left lateral guiding block 231 is located on the left end of the right lateral guiding block 232. There is a lateral guiding channel between the left lateral guiding block 231 and the right lateral guiding block 232 for the mid-frame of the mobile phone to pass through. The front end of the lateral guiding channel is flared. The left lateral guiding block 231 and the right lateral guiding block 232 are respectively installed on the feeding conveyor bracket 21 through the first adjustable bracket 233.

[0083] In the process of the feeding and conveying component 2 of this embodiment realizing the horizontal feeding action of the mobile phone mid-frame, the operator places the mobile phone mid-frame horizontally on the conveying surface of the feeding conveyor belt 22. The feeding conveyor belt 22 moves the mobile phone mid-frame from front to back into the horizontal guide channel between the left horizontal guide block 231 and the right horizontal guide block 232. The horizontal guide channel positions the horizontal mobile phone mid-frame so that the mobile phone mid-frame can accurately enter the front clamping and conveying component 3.

[0084] In this embodiment, the left lateral guide block 231 and the right lateral guide block 232 are respectively mounted on the feeding conveyor bracket 21 via the first adjustable bracket 233. The first adjustable bracket 233 enables the left lateral guide block 231 and the right lateral guide block 232 to be adaptively shifted left and right so that the lateral guide channel adapts to the lateral dimensions of the mobile phone frame.

[0085] Example 7, as Figure 13 As shown, the difference between this embodiment seven and embodiment one is that: the steering conveying assembly 4 includes a steering conveying bracket 41 mounted on the frame 1, the steering conveying bracket 41 is equipped with an intermediate conveyor belt 42, the steering conveying bracket 41 is equipped with a mid-frame longitudinal guiding mechanism 43 above the conveying surface of the intermediate conveyor belt 42, and a touch steering mechanism located in front of the mid-frame longitudinal guiding mechanism 43; the touch steering mechanism includes a steering block 44 that is fastened to the steering conveying bracket 41 and extends into the conveying surface of the intermediate conveyor belt 42; during operation, the horizontally placed mobile phone mid-frame enters the intermediate conveyor belt 42, the steering block 44 touches and moves the mobile phone mid-frame to rotate to the longitudinal direction, and the vertically placed mobile phone mid-frame is guided by the mid-frame longitudinal guiding mechanism 43 and then conveyed to the rear clamping conveying assembly 5.

[0086] Specifically, the mid-frame longitudinal guiding mechanism 43 includes a left longitudinal guiding block 431 and a right longitudinal guiding block 432 that are arranged opposite each other and spaced apart. The left longitudinal guiding block 431 is located on the left end of the right longitudinal guiding block 432. There is a longitudinal guiding channel between the left longitudinal guiding block 431 and the right longitudinal guiding block 432 for the mid-frame of the mobile phone to pass through. The front end of the longitudinal guiding channel is flared. The left longitudinal guiding block 431 and the right longitudinal guiding block 432 are respectively mounted on the steering and conveying bracket 41 through the second adjustable bracket 433.

[0087] In the process of vertically rotating and transferring the mobile phone frame in the steering and conveying assembly 4 of this embodiment 7, the mobile phone frame, which is vertically arranged and clamped by the front end conveying assembly 3, enters the conveying surface of the middle conveyor belt 42. When the vertical mobile phone frame reaches the position of the steering block 44, the steering block 44 touches and moves the mobile phone frame to rotate to the vertical direction. The mobile phone frame, which is adjusted to be placed vertically, is guided by the vertical guide mechanism 43 and then conveyed to the rear end clamping and conveying assembly 5.

[0088] When the vertical mobile phone frame passes through the vertical guide mechanism 43, the middle conveyor belt 42 moves the mobile phone frame from front to back into the vertical guide channel between the left vertical guide block 431 and the right vertical guide block 432. The vertical guide channel positions the vertical mobile phone frame so that the mobile phone frame can accurately enter the rear clamping and conveying component 5.

[0089] In this embodiment, the left longitudinal guide block 431 and the right longitudinal guide block 432 are respectively mounted on the steering conveying bracket 41 via the second adjustable bracket 433. The second adjustable bracket 433 enables the left longitudinal guide block 431 and the right longitudinal guide block 432 to be adaptively shifted left and right so that the longitudinal guide channel adapts to the longitudinal dimension of the mobile phone frame.

[0090] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. An automatic fine-repair and polishing device for mobile phone mid-frame, comprising a frame (1), wherein the frame (1) is equipped with a mid-frame conveying assembly and an automatic polishing assembly; Its features are: The mid-frame conveying assembly includes a feeding conveying assembly (2), a front clamping conveying assembly (3), a turning conveying assembly (4), a rear clamping conveying assembly (5), and a discharging conveyor belt (6) arranged sequentially from front to back along the conveying direction of the mobile phone mid-frame. The front clamping conveying assembly (3) and the rear clamping conveying assembly (5) are synchronous belt conveying assemblies. The feeding conveying assembly (2) is used to convey the mobile phone mid-frame laterally to the front clamping conveying assembly (3), and the turning conveying assembly (4) is used to turn and adjust the mobile phone mid-frame to the longitudinal direction and convey the longitudinal mobile phone mid-frame to the rear clamping conveying assembly (5). The synchronous belt conveyor assembly includes a lower fixed frame (71) mounted on the frame (1), the lower fixed frame (71) being equipped with a first synchronous belt mechanism (72), the first synchronous belt mechanism (72) including a first driving synchronous pulley (721), a first driven synchronous pulley (722), and a first feeding synchronous belt (723) wound between the first driving synchronous pulley (721) and the first driven synchronous pulley (722); an upper movable frame (73) is mounted above the lower fixed frame (71), the upper movable frame (73) being equipped with a connection to the first synchronous belt mechanism (72). The second synchronous belt mechanism (74) operates synchronously. The second synchronous belt mechanism (74) includes a second driving synchronous belt pulley (741), a second driven synchronous belt pulley (742), and a second feeding synchronous belt (743) wrapped between the second driving synchronous belt pulley (741) and the second driven synchronous belt pulley (742). The conveying surfaces of the first feeding synchronous belt (723) and the second feeding synchronous belt (743) are respectively covered with a soft rubber layer (76). The synchronous belt conveying assembly also includes a tension adjustment mechanism for adjusting the height position of the upper movable frame (73). The automatic polishing assembly includes several left-side short-edge polishing mechanisms located on the left side of the front clamping and conveying assembly (3), several right-side short-edge polishing mechanisms located on the right side of the front clamping and conveying assembly (3), several left-side long-edge polishing mechanisms located on the left side of the rear clamping and conveying assembly (5), and several right-side long-edge polishing mechanisms located on the right side of the rear clamping and conveying assembly (5); the several left-side short-edge polishing mechanisms include one for polishing the lower edge of the short edge of the mobile phone frame and one for polishing the upper edge of the short edge of the mobile phone frame; the several right-side short-edge polishing mechanisms include one for polishing the short edge of the mobile phone frame. The device includes a right-side short-edge grinding mechanism for grinding the lower edge of the phone frame and a right-side short-edge grinding mechanism for grinding the upper edge of the short edge of the phone frame. It also includes several left-side long-edge grinding mechanisms, one for grinding the lower edge of the long edge of the phone frame and one for grinding the upper edge of the long edge of the phone frame. Finally, it includes several right-side long-edge grinding mechanisms, one for grinding the lower edge of the long edge of the phone frame and one for grinding the upper edge of the long edge of the phone frame. Each left-side short-edge grinding mechanism, each right-side short-edge grinding mechanism, each left-side long-edge grinding mechanism, and each right-side long-edge grinding mechanism is a sandpaper grinding head assembly.

2. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 1, characterized in that: The sandpaper grinding head assembly includes a base (851) fastened to the frame (1), a translational movable seat (852) is horizontally slidably mounted on the upper end of the base (851), a translational drive cylinder (853) is mounted on the base (851) corresponding to the translational movable seat (852), and the outer end of the piston rod of the translational drive cylinder (853) is connected to the translational movable seat (852); a fine-tuning movable seat (854) is mounted on the upper end of the translational movable seat (852), and a fine-tuning drive mechanism (855) for driving the fine-tuning movable seat (854) to make fine-tuning movements relative to the translational movable seat (852) is installed between the translational movable seat (852) and the fine-tuning movable seat (854). The sandpaper grinding head assembly also includes an angle adjustment plate (856), a linear drive module (857), a sandpaper mounting bracket (858), and sandpaper (859). The angle adjustment plate (856) is provided with a shaft (8561), which is rotatably mounted on the upper end of the fine-tuning movable seat (854) via a bearing. The angle adjustment plate (856) has at least three internally threaded holes arranged in a ring array on the circumference of the shaft (8561), and each internally threaded hole contains... The screw is fitted with a locking screw (8510). The upper end of the fine-adjustment movable seat (854) is provided with an arc-shaped through hole (8541) extending in an arc shape corresponding to each locking screw (8510). Each locking screw (8510) passes through the corresponding arc-shaped through hole (8541). The linear drive module (857) is fastened to the angle adjustment plate (856). The sandpaper mounting bracket (858) is installed on the drive end of the linear drive module (857). The sandpaper (859) is installed on the sandpaper mounting bracket (858).

3. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 2, characterized in that: The fine-tuning drive mechanism (855) includes a fine-tuning drive screw (8551) that is rotatably mounted on the translational movable seat (852) via a bearing and extends in the left-right direction. A fine-tuning drive handwheel (8552) is installed at one end of the fine-tuning drive screw (8551). A fine-tuning screw nut (8553) is fastened to the fine-tuning movable seat (854), and the fine-tuning screw nut (8553) cooperates with the fine-tuning drive screw (8551). The upper end of the translational movable seat (852) is equipped with a fine-tuning guide post (8554) extending in a straight line along the left and right direction, and the lower end of the fine-tuning movable seat (854) is equipped with a fine-tuning guide sleeve (8555). The fine-tuning guide post (8554) and the fine-tuning guide sleeve (8555) cooperate with each other.

4. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 1, characterized in that: The tension adjustment mechanism includes a tension adjustment bracket (751) that is fastened to the frame (1) and located above the upper movable frame (73). The upper movable frame (73) is rotatably mounted with a vertically arranged tension adjustment screw (752) via a bearing. The upper end of the tension adjustment screw (752) extends above the tension adjustment bracket (751), and a tension drive handwheel (754) located above the tension adjustment bracket (751) is fastened to the upper end of the tension adjustment screw (752). The tension adjustment bracket (751) is screwed with a fixed tension screw nut (753) corresponding to the tension adjustment screw (752), and the tension adjustment screw (752) and the tension screw nut (753) cooperate with each other. The upper movable frame (73) is fastened with several tension adjustment guide posts (756) arranged vertically. The tension adjustment bracket (751) is fastened with tension adjustment guide sleeves (757) corresponding to each tension adjustment guide post (756). Each tension adjustment guide post (756) is inserted into the center hole of the corresponding tension adjustment guide sleeve (757).

5. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 1, characterized in that: The first synchronous belt mechanism (72) further includes a first driving shaft (724) and a first driven shaft (725). The first driving shaft (724) and the first driven shaft (725) are respectively rotatably mounted on the lower fixed frame (71) through bearings. The first driving synchronous belt pulley (721) is mounted on the first driving shaft (724), and the first driven synchronous belt pulley (722) is mounted on the first driven shaft (725). The second synchronous belt mechanism (74) further includes a second driving shaft (744) and a second driven shaft (745). The second driving shaft (744) and the second driven shaft (745) are rotatably mounted on the upper movable frame (73) via bearings. The second driving synchronous belt pulley (741) is mounted on the second driving shaft (744), and the second driven synchronous belt pulley (742) is mounted on the second driven shaft (745). The frame (1) is equipped with a geared drive motor (771), and the power output shaft of the geared drive motor (771) is driven and connected to the first active rotating shaft (724) and the second active rotating shaft (744) respectively.

6. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 5, characterized in that: The power output shaft of the speed reduction drive motor (771) is connected to the first active rotating shaft (724) via a coupling (772); the frame (1) is also equipped with an auxiliary bracket (773), and the upper end of the auxiliary bracket (773) is rotatably mounted with an auxiliary rotating shaft (774) via a bearing. The first active rotating shaft (724) is driven to connect with the auxiliary rotating shaft (774) via a transmission pair (775), and the auxiliary rotating shaft (774) is also driven to connect with the second active rotating shaft (744) via a transmission pair (775). The transmission pair (775) is a gear transmission pair or a belt transmission pair.

7. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 1, characterized in that: The feeding and conveying assembly (2) includes a feeding and conveying bracket (21) mounted on the frame (1), a feeding and conveying belt (22) mounted on the feeding and conveying bracket (21), and a middle frame transverse guiding mechanism (23) mounted above the conveying surface of the feeding and conveying belt (22). During operation, the mobile phone middle frame is placed transversely on the conveying surface of the feeding and conveying belt (22), and the mobile phone middle frame, after being guided by the middle frame transverse guiding mechanism (23), is conveyed to the front clamping and conveying assembly (3).

8. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 7, characterized in that: The middle frame lateral guiding mechanism (23) includes a left lateral guiding block (231) and a right lateral guiding block (232) that are arranged opposite each other and spaced apart. The left lateral guiding block (231) is located on the left side of the right lateral guiding block (232). There is a horizontal guide channel between the left horizontal guide block (231) and the right horizontal guide block (232) for the mobile phone frame to pass through, and the front end of the horizontal guide channel is flared. The left lateral guide block (231) and the right lateral guide block (232) are respectively installed on the feeding conveyor bracket (21) via the first adjustable bracket (233).

9. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 8, characterized in that: The steering conveying assembly (4) includes a steering conveying bracket (41) mounted on the frame (1), the steering conveying bracket (41) is equipped with an intermediate conveyor belt (42), and the steering conveying bracket (41) is equipped with a middle frame longitudinal guiding mechanism (43) and a touch steering mechanism located in front of the middle frame longitudinal guiding mechanism (43) above the conveying surface of the intermediate conveyor belt (42). The touch steering mechanism includes a steering block (44) that is fastened to the steering conveyor bracket (41) and extends into the conveyor surface of the intermediate conveyor belt (42). During operation, the horizontally placed mobile phone frame enters the intermediate conveyor belt (42), the steering block (44) touches and moves the mobile phone frame to rotate to the longitudinal direction, and the vertically placed mobile phone frame is guided by the longitudinal guide mechanism (43) and then conveyed to the rear clamping conveyor assembly (5).

10. The automatic fine-repair and polishing equipment for mobile phone mid-frames according to claim 9, characterized in that: The longitudinal guiding mechanism (43) of the middle frame includes a left longitudinal guiding block (431) and a right longitudinal guiding block (432) that are arranged opposite each other and spaced apart. The left longitudinal guiding block (431) is located on the left side of the right longitudinal guiding block (432). There is a vertical guide channel between the left vertical guide block (431) and the right vertical guide block (432) for the mobile phone frame to pass through, and the front end of the vertical guide channel is flared. The left longitudinal guide block (431) and the right longitudinal guide block (432) are respectively installed on the steering conveyor bracket (41) via the second adjustable bracket (433).

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