Punching positioning mechanism for mobile phone protection sleeve machining
Through the concentric positioning structure and magnetic connection structure, combined with visual guidance and dynamic compensation positioning, the problems of inaccurate positioning and poor versatility in traditional mobile phone protective case processing are solved, and efficient and accurate mobile phone protective case processing is achieved.
Patent Information
- Application Number
- CN202510806890.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-17
- Publication Date
- 2025-08-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional mobile phone protective case punching and positioning technology cannot adapt to the elastic deformation of flexible materials, resulting in punching and offset, and the positioning structure is complex and has poor versatility, making it difficult to meet the processing needs of different shapes and sizes, and the clamping stability is poor, resulting in high scrap rate.
The concentric positioning structure 1 and the concentric positioning structure 2 are used to cooperate with each other, combined with visual guidance and dynamic compensation positioning, the magnetic connection structure is quickly adapted to different shapes, and the workpiece is protected by silicone gaskets and pressure sensors to achieve accurate concentric positioning.
It improves punching and cutting accuracy, protects the appearance quality of the workpiece, reduces the scrap rate, shortens product switching time, expands the scope of equipment application, and improves production efficiency and versatility.
Smart Images
Figure CN120481005A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of processing mobile phone protective covers, and in particular to a punching and positioning mechanism for processing mobile phone protective covers. Background Art
[0002] With the widespread adoption of smartphones, mobile phone cases, as an important mobile phone peripheral product, continue to see growing market demand. Mobile phone cases not only provide physical protection for phones but also meet users' aesthetic needs through personalized designs. In the production of mobile phone cases, punching and positioning are key processes, directly determining the product's dimensional accuracy, appearance quality, and production efficiency. Precise punching and positioning ensure that the hole position and contours of the mobile phone case perfectly match the phone, improving product quality. It also helps increase the degree of automation in the production process and reduce production costs.
[0003] However, the traditional punching and positioning technology for mobile phone cases still has many shortcomings. Traditional mechanical positioning cannot adapt to the elastic deformation of flexible materials such as TPU and silicone, resulting in punching offset. Some equipment uses manual positioning. For curved screen cases or special-shaped products with camera holes, manual calibration is not only inefficient, but the positioning accuracy is greatly affected by the operator's experience and proficiency, making it difficult to ensure product consistency. Quality problems such as hole position deviation and uneven edges are prone to occur. Even some equipment that uses automated positioning generally has problems with complex positioning structure and poor versatility, making it difficult to quickly adapt to the processing needs of mobile phone cases of different shapes and sizes. In addition, the traditional positioning mechanism has poor clamping stability for the workpiece, and the workpiece is prone to displacement during the punching process, resulting in an increase in the scrap rate. For this reason, we propose a punching and positioning mechanism for mobile phone case processing. Summary of the Invention
[0004] (1) Technical problems solved In view of the deficiencies in the prior art, the present invention provides a punching and positioning mechanism for processing a mobile phone protective cover, which solves the above-mentioned problems.
[0005] (2) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solution: a punching and positioning mechanism for processing a mobile phone protective case, comprising: A punching machine is provided with a processing platform. A punching group consisting of a punching tool and a hydraulic cylinder is provided above the processing platform of the punching machine. A visual correction module consisting of an industrial camera and an LED light source is integrated on one side of the punching group. A bending frame and a displacement base, wherein the bending frame is fixedly mounted on one side of a processing platform, a positioning groove is provided on the processing platform and is fitted with the displacement base, a Y-axis lateral movement mechanism is provided between the bending frame and the positioning groove, and the displacement base has the freedom of lateral and axial displacement between the processing platform and the bending frame through the Y-axis lateral movement mechanism; A lower die base and a profiling cavity, wherein the lower die base is fixedly mounted at the top center of the displacement base, a rectangular groove is formed at the top of the lower die base, and the profiling cavity is filled in the rectangular groove, the center points of the displacement base, the lower die base, the profiling cavity, and the punching group are located on the same vertical line, and a magnetic connection structure is provided between the lower die base and the profiling cavity; The concentric positioning structure 1 is arranged on both ends of the lower die base and the concentric structure 2 is arranged on the processing platform. The concentric positioning structure 1 and the concentric structure 2 cooperate with each other to firmly clamp the two ends and both sides of the mobile phone protective cover to be processed.
[0006] Preferably, the top of the displacement base and the bending frame are flush with the processing platform, the positioning groove is open at the end side close to the bending frame, and the end side of the displacement base facing away from the bending frame is fitted with the inner wall of the end side of the positioning groove facing away from the exit end, the bending frame is L-shaped and a rectangular opening groove is provided at the horizontal top, and the rectangular opening groove is open at the end side of the bending frame fitting the punching machine.
[0007] Preferably, the Y-axis traverse structure includes a threaded screw and a servo motor; Two sets of parallel threaded screws are rotatably installed between the positioning groove and the inner wall of the rectangular opening groove facing away from each other, and the displacement base in the positioning groove is threadedly sleeved on the two sets of threaded screws; Two sets of servo motors are fixedly installed on the end side of the bending frame corresponding to the side facing away from the punching machine, and the output shafts of the two sets of servo motors pass through the side wall of the bending frame and are respectively fixedly connected to the two sets of threaded screws.
[0008] Preferably, the magnetic connection structure includes a protruding block and a magnetic member, and the middle of the four inner walls of the lower die base corresponding to the rectangular groove are fixed with an integrated protruding block, and the four outer walls of the contoured cavity are respectively fitted with the protruding blocks; The protruding blocks on the four sides and the outer walls of the four sides of the contoured cavity are all embedded with magnetically attractive magnets; The top of the profiling cavity is flush with the top of the lower die base, and there is a space between the four inner walls of the profiling cavity and the four inner walls of the lower die base via the protruding blocks.
[0009] Preferably, the concentric positioning structure 1 includes two sets of displacement blocks 1, a transverse displacement groove, a connecting vertical rod and a clamping plate 1. The upper half of the displacement base is provided with a cavity groove 1 and is in a cavity shape. A guide rail cross bar is fixedly installed on the bottom inner wall of the displacement base corresponding to the cavity groove 1. The guide rail crossbar is located directly below the lower die base and its center is located on the same vertical line. The bottom ends of the two groups of displacement blocks are each provided with an open-shaped notch square groove adapted to the guide rail crossbar, and the two groups of displacement blocks are respectively slidably engaged with the two ends of the guide rail crossbar through the notch square grooves. A transverse groove is provided on the top of the displacement base corresponding to the center line of the two ends of the bottom of the lower mold base. The transverse groove is connected to the cavity groove 1 and is located directly above the displacement block 1. The top ends of the two groups of displacement blocks are fixedly mounted with connecting vertical rods, and the two groups of connecting vertical rods are respectively slidably engaged in the transverse displacement grooves at both ends of the bottom of the lower die base; The top end of the connecting vertical rod extends out of the transverse groove and is fixedly mounted with an integrated clamping plate 1, the bottom end of the clamping plate 1 is lower than the top end of the lower die base, and the top end of the clamping plate 1 is higher than the top end of the lower die base; The clamping plates on both sides of the lower die base are symmetrical about the center line of the lower die base.
[0010] Preferably, the concentric positioning structure 1 further includes a cylinder, a connecting block and a lever arm 1, and the cylinder is embedded in the cavity groove 1 corresponding to the displacement base, and the cylinder is located at the side of the displacement base and perpendicular to the guide rail crossbar; The piston rod of the cylinder faces the guide rail crossbar and is fixedly installed with a connecting block, there is a distance between the connecting block and the guide rail crossbar, and the two sides of the end surface of the connecting block are respectively hinged to the side walls of the two groups of displacement blocks on the guide rail crossbar. The two groups of lever arms are in mutually symmetrical and inclined shapes; Silicone gaskets are fixedly installed on the side outer walls of the two groups of clamping plates that are close to each other, and pressure sensors are provided on the two groups of clamping plates.
[0011] Preferably, the second concentric positioning structure includes a vertical shaft, a clamping rod, a vertical base rod, a horizontal plate and a clamping column. The outer sides of the four corners of the processing platform corresponding to the displacement base are rotatably mounted with vertical shafts, and the top ends of the four groups of vertical shafts are fixedly mounted with clamping rods parallel to the two sides of the displacement base, and the ends of the two groups of clamping rods on the same side are opposite and close to each other. The ends of the four groups of clamping rods are all fixedly mounted with vertical base rods, and the top ends of the vertical base rods are fixedly mounted with horizontal cross plates; The two groups of horizontal plates on both sides of the displacement base are spaced apart in parallel, and the ends of the two groups of horizontal plates on the same side face the outer walls of both sides of the displacement base, and the ends of the horizontal plates facing the displacement base are fixedly installed with clamping columns parallel to the vertical base rods.
[0012] Preferably, the bottom ends of the four groups of clamping columns are flush with the top end of the lower die base, and the clamping columns on both sides of the lower die base are symmetrical about the vertical centerline of the lower die base; The outsides of the clamping columns are all fixedly wrapped with silicone sleeves, and pressure sensors are provided on the four groups of clamping columns.
[0013] Preferably, the concentric positioning structure further includes a flip plate, a limiting cross bar, a second displacement block and a transmission rod, and a second cavity groove is opened below the corresponding processing platform of the punching machine, and the bottom ends of the four groups of vertical shafts all extend into the second cavity groove; The bottom ends of the four sets of vertical shafts located in the second cavity groove are all fixedly mounted with flip plates, and the four sets of flip plates are symmetrical about the vertical centerline of the lower die base, and the vertical shafts and flip plates are L-shaped; A limiting cross bar parallel to the clamping rod is fixedly installed just below the corresponding displacement base in the second cavity slot; The limiting crossbar is slidably sleeved with two sets of symmetrical displacement blocks 2, and a transmission rod is hinged between each set of limiting crossbars and the two sets of flip plates on the same end side facing away from each other; The two groups of transmission rods on the displacement block 2 are symmetrically inclined, and the four groups of transmission rods are symmetrical about the vertical center line of the lower mold base.
[0014] Preferably, the concentric positioning structure further includes a servo motor 2, a turntable, a lever arm 3 and a lever arm 4, and the servo motor 2 is embedded in the inner wall of the bottom of the cavity groove 2 corresponding to the position directly below the center of the limit cross bar, and the top end of the output shaft of the servo motor 2 faces the limit cross bar and is fixedly installed with a turntable; The two sides of the turntable are fixedly installed with force arm rods three symmetrical about the center, and the two groups of force arm rods three are hinged to the ends facing away from each other with force arm rods four, and the free ends of the two groups of force arm rods four are respectively hinged to the bottom center of the displacement blocks two on both sides.
[0015] (3) Beneficial effects Compared with the prior art, the present invention provides a punching and positioning mechanism for processing mobile phone protective cases, which has the following beneficial effects: The punching and positioning mechanism for processing mobile phone protective cases cooperates with the concentric positioning structure 1 and the concentric positioning structure 2 to firmly clamp the two ends and two sides of the mobile phone protective case to be processed respectively. The combination of the two enables the workpiece to be precisely positioned concentrically directly below the punching group. At the same time, dynamic compensation positioning is combined with visual guidance to improve punching accuracy. It meets the high-precision processing requirements for curved screen protective cases or special-shaped products with camera openings. A silicone gasket is fixedly installed on the clamping plate, and a silicone sleeve is fixedly wrapped around the outside of the clamping column, which can effectively prevent the workpiece surface from being scratched and worn during the clamping process, thereby protecting the appearance quality of the workpiece. At the same time, pressure sensors are provided on the clamping plate and the clamping column to monitor the clamping force in real time, avoiding damage to the workpiece due to improper clamping force, ensuring the safety of the workpiece during processing, and solving the problem that traditional mechanical positioning cannot adapt to the elastic deformation of flexible materials such as TPU and silicone, resulting in punching offset. The lower die base and the contour cavity utilize a magnetic connection structure, comprised of a protruding block and a magnetic element. During replacement, the magnetic force between the magnetic elements and the space created by the protruding block allow for easy connection and separation of the contour cavity from the lower die base, without the need for complex tools or manipulation. This allows for rapid adaptation to the processing needs of mobile phone cases of varying shapes, improving the equipment's adaptability to diverse products, shortening preparation time for product switching and boosting production efficiency. The rapid replacement of the contour cavity allows for processing a wide range of mobile phone case shapes, while the concentric positioning structure and Y-axis traverse mechanism enable effective positioning and adjustment of workpieces of varying sizes, expanding the equipment's applicability and enhancing its versatility. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 Schematic diagram of the Y-axis traverse mechanism structure of the present invention; Figure 3 This is a schematic diagram of the displacement base structure of the present invention; Figure 4 This is a schematic cross-sectional view of a displacement base of the present invention; Figure 5 for Figure 4 A local enlarged schematic diagram of point A in FIG; Figure 6 It is a cross-sectional schematic diagram of the processing platform of the present invention; Figure 7 This is a schematic diagram of the second concentric positioning structure of the present invention; Figure 8 for Figure 6 A partial enlarged schematic diagram of point B in FIG.
[0017] Figure: 1, punching machine; 2, processing platform; 3, bending frame; 4, positioning groove; 5, displacement base; 6, lower die base; 7, contour cavity; 8, screw rod; 9, servo motor 1; 10, rectangular opening slot; 11, protruding block; 12, magnet; 13, cavity slot 1; 14, guide rail crossbar; 15, displacement block 1; 16, notched square slot; 17, transverse slot; 18, connecting vertical rod; 19, clamping plate 1; 20. Silicone gasket; 21. Cylinder; 22. Connecting block; 23. Lever rod 1; 24. Cavity slot 2; 25. Vertical shaft; 26. Clamping rod; 27. Vertical base rod; 28. Horizontal plate; 29. Clamping column; 30. Silicone sleeve; 31. Flip plate; 32. Limiting cross bar; 33. Displacement block 2; 34. Transmission rod; 35. Servo motor 2; 36. Turntable; 37. Lever rod 3; 38. Lever rod 4. DETAILED DESCRIPTION
[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0019] See also Figure 1-8 , a punching and positioning mechanism for processing a mobile phone protective cover, comprising: A punching machine 1 is provided with a processing platform 2. A punching group consisting of a punching tool and a hydraulic cylinder is provided above the processing platform 2. A visual correction module consisting of an industrial camera and an LED light source is integrated on one side of the punching group. Before processing, the industrial camera uses the illumination provided by the LED light source to capture and detect the position and posture of the mobile phone protective case to be processed, obtain its initial position information, and provide a data basis for subsequent precise positioning and punching. The bending frame 3 and the displacement base 5 are fixedly mounted on one side of the processing platform 2. The processing platform 2 is provided with a positioning groove 4 and is fitted with the displacement base 5. A Y-axis lateral movement mechanism is provided between the bending frame 3 and the positioning groove 4. The displacement base 5 has the freedom of lateral and axial displacement between the processing platform 2 and the bending frame 3 through the Y-axis lateral movement structure. The lower die base 6 and the profiling cavity 7, wherein the lower die base 6 is fixedly mounted at the top center of the displacement base 5, a rectangular groove is opened at the top of the lower die base 6, and the profiling cavity 7 is filled in the rectangular groove, the displacement base 5, the lower die base 6, the profiling cavity 7 and the center points of the punching group are located on the same vertical line, and a magnetic connection structure is provided between the lower die base 6 and the profiling cavity 7; The concentric positioning structure 1 is arranged on both ends of the lower die base 6 and the concentric structure 2 is arranged on the processing platform 2. The concentric positioning structure 1 and the concentric structure 2 cooperate with each other to firmly clamp the two ends and both sides of the mobile phone protective cover to be processed.
[0020] Furthermore, the top of the displacement base 5 and the bending frame 3 are flush with the processing platform 2, the positioning groove 4 is open at the end side close to the bending frame 3, and the end side of the displacement base 5 facing away from the bending frame 3 is fitted with the inner wall of the end side of the positioning groove 4 facing away from the exit end. When the displacement base 5 is moved into place, this fitting method can play a limiting role, ensuring that the displacement base 5 is in the correct position during processing. The bending frame 3 is L-shaped and has a rectangular opening groove 10 at the horizontal top, and the rectangular opening groove 10 is open at the end side of the bending frame 3 fitting the punching machine 1.
[0021] Furthermore, the Y-axis transverse movement structure includes a threaded screw 8 and a servo motor 9; two sets of parallel threaded screws 8 are rotatably installed between the positioning groove 4 and the rectangular opening groove 10, which are away from each other on the inner wall of the end side, and the displacement base 5 in the positioning groove 4 is threadedly sleeved on the two sets of threaded screws 8; two sets of servo motors 9 are fixedly installed on the end side of the bending frame 3 corresponding to the end side away from the punching machine 1, and the output shafts of the two sets of servo motors 9 pass through the side wall of the bending frame 3 and are respectively fixed to the two sets of threaded screws 8.
[0022] Furthermore, the magnetic connection structure includes a protruding block 11 and a magnetic member 12. An integrated protruding block 11 is fixedly positioned in the middle of each of the four inner walls of the rectangular groove of the lower die base 6, and the four outer walls of the contour cavity 7 are respectively aligned with the protruding block 11. The four protruding blocks 11 and the four outer walls of the contour cavity 7 are embedded with magnetically attractive magnetic members 12. The top of the contour cavity 7 is flush with the top of the lower die base 6, and the four inner walls of the contour cavity 7 are separated from the four inner walls of the lower die base 6 by the protruding block 11. The magnetic connection structure utilizes the magnetic force of the magnetic member 12 to achieve rapid connection and separation between the contour cavity 7 and the lower die base 6, making operation simple and quick. The protruding block 11 serves to position and separate the contour cavity 7, ensuring its accurate position during installation. The separated space also facilitates its removal, enabling the mechanism to quickly adapt to the processing of mobile phone cases of different shapes, improving the versatility and processing efficiency of the equipment.
[0023] Furthermore, the concentric positioning structure 1 includes two groups of displacement blocks 15, transverse grooves 17, connecting vertical rods 18 and clamping plates 19. The upper half of the displacement base 5 is provided with a cavity groove 13 and is in the shape of a cavity. A guide rail cross bar 14 is fixedly installed on the bottom inner wall of the displacement base 5 corresponding to the cavity groove 13; the guide rail cross bar 14 is located directly below the lower mold base 6 and its center is located on the same vertical line. The bottom ends of the two groups of displacement blocks 15 are provided with open-shaped notched square grooves 16 that are adapted to the guide rail cross bar 14, and the two groups of displacement blocks 15 are slidably engaged with the two ends of the guide rail cross bar 14 through the notched square grooves 16; the top of the displacement base 5 A transverse groove 17 is provided on the midline of the two ends of the bottom of the lower die base 6, which is connected to the cavity groove 13 and is located directly above the displacement block 15; the tops of the two groups of displacement blocks 15 are fixedly installed with connecting vertical rods 18, and the two groups of connecting vertical rods 18 are respectively slidably engaged in the transverse grooves 17 at the two ends of the bottom of the lower die base 6; the tops of the connecting vertical rods 18 extend out of the transverse groove 17 and are fixedly installed with an integrated clamping plate 19, the bottom end of the clamping plate 19 is lower than the top of the lower die base 6, and the top of the clamping plate 19 is higher than the top of the lower die base 6; the clamping plates 19 on both sides of the lower die base 6 are symmetrical about the midline of the lower die base 6.
[0024] Furthermore, the concentric positioning structure 1 also includes a cylinder 21, a connecting block 22 and a lever arm 23. The cylinder 21 is embedded in the cavity groove 13 corresponding to the displacement base 5, and the cylinder 21 is located at the side of the displacement base 5 and is perpendicular to the guide rail cross bar 14; the piston rod of the cylinder 21 faces the guide rail cross bar 14 and is fixedly installed with a connecting block 22. There is a spacing distance between the connecting block 22 and the guide rail cross bar 14, and the end faces of the connecting block 22 are respectively hinged to the side walls of the two groups of displacement blocks 15 on the guide rail cross bar 14 with a lever arm 23; the two groups of lever arms 23 are symmetrically inclined with each other; when the piston rod of the cylinder 21 extends or contracts, the connecting block 22 moves accordingly, and the lever arm 23 rotates around the hinge point with the displacement block 15 and the connecting block 22, driving the displacement block 15 to slide on the guide rail cross bar 14. The displacement block 15 drives the clamping plate 19 to slide up and down in the transverse groove 17 by connecting the vertical rod 18, thereby realizing the clamping and loosening actions of the two ends of the workpiece; silicone gaskets 20 are fixedly installed on the side outer walls of the two groups of clamping plates 19 close to each other, and pressure sensors are provided on both groups of clamping plates 19. The silicone gaskets 20 and pressure sensors further improve the safety and accuracy of clamping, ensuring that the workpiece will not be displaced or damaged due to improper clamping during the processing process.
[0025] Furthermore, the second concentric positioning structure includes a vertical shaft 25, a clamping rod 26, a vertical base rod 27, a horizontal plate 28 and a clamping column 29. The vertical shafts 25 are rotatably installed on the outer sides of the four corners of the processing platform 2 corresponding to the displacement base 5, and the top ends of the four groups of vertical shafts 25 are fixedly installed with clamping rods 26 parallel to the two sides of the displacement base 5, and the ends of the two groups of clamping rods 26 on the same side are relative and close to each other; the ends of the four groups of clamping rods 26 are fixedly installed with vertical vertical base rods 27, and the top ends of the vertical base rods 27 are fixedly installed with horizontal horizontal plates 28; the two groups of horizontal plates 28 on both sides of the displacement base 5 are parallel and spaced apart, and the ends of the two groups of horizontal plates 28 on the same side face the outer walls of the two sides of the displacement base 5, and the ends of the horizontal plates 28 facing the displacement base 5 are fixedly installed with clamping columns 29 parallel to the vertical base rods 27.
[0026] Furthermore, the bottom ends of the four groups of clamping columns 29 are flush with the top end of the lower mold base 6, and the clamping columns 29 on both sides of the lower mold base 6 are symmetrical about the vertical center line of the lower mold base 6; the outside of the clamping columns 29 are fixedly wrapped with a silicone sleeve 30, and pressure sensors are provided on the four groups of clamping columns 29.
[0027] Furthermore, the concentric positioning structure also includes a flip plate 31, a limiting cross bar 32, a displacement block 2 33 and a transmission rod 34. A cavity groove 24 is provided below the punching machine 1 corresponding to the processing platform 2, and the bottom ends of the four groups of vertical shafts 25 extend into the cavity groove 24; the bottom ends of the four groups of vertical shafts 25 located in the cavity groove 24 are fixedly installed with a flip plate 31, and the four groups of flip plates 31 are symmetrical about the vertical center line of the lower die base 6, and the vertical shaft 25 and the flip plate 3 1 is L-shaped; a limiting cross bar 32 parallel to the clamping rod 26 is fixedly installed in the cavity groove 24 just below the corresponding displacement base 5; the limiting cross bar 32 is slidably sleeved with two groups of symmetrical displacement blocks 2 33, and a transmission rod 34 is hinged between each group of limiting cross bars 32 and the two groups of flip plates 31 on the same end side facing away from each other; the two groups of transmission rods 34 on the displacement block 2 33 are symmetrically inclined, and the four groups of transmission rods 34 are symmetrical about the vertical centerline of the lower die base 6.
[0028] Furthermore, the concentric positioning structure also includes a servo motor 2 35, a turntable 36, a lever arm 37, and a lever arm 4 38. The servo motor 2 35 is embedded in the inner wall of the bottom of the cavity 2 24, directly below the center of the limit bar 32. The top of the output shaft of the servo motor 2 35 faces the limit bar 32 and is fixedly mounted with the turntable 36. The lever arms 3 37 are fixedly mounted on both sides of the turntable 36, symmetrically about the center. The two sets of lever arms 3 37 are hinged to their ends facing away from each other, and the free ends of the two sets of lever arms 4 38 are respectively hinged to the bottom centers of the displacement blocks 2 33 on both sides. The lever arms 4 38 on both sides are parallel and symmetrical about the center of the turntable 36. The output shaft of the servo motor 2 35 drives the turntable 36 to rotate. When the turntable 36 rotates, the lever arms 3 37 fixed on both sides thereof make circular motion around the center of the turntable, and the lever arms 3 37 drive the lever arms 4 38 to move through the hinge points. The free end of the lever arm 4 38 is hinged to the displacement block 2 33, thereby pushing the displacement block 2 33 to slide on the limit cross bar 32. The lever arms 4 38 on both sides are parallel and symmetrical about the center of the turntable 36, ensuring the synchronization and symmetry of the movement of the displacement blocks 2 33 on both sides.
[0029] Working Principle: When it is necessary to process mobile phone cases of different shapes, a magnetic connection structure is used to replace the contour cavity 7. Integrated protrusions 11 are fixed to the middle positions of the inner walls on all four sides of the rectangular groove of the lower die base 6. The outer walls of the contour cavity 7 fit in contact with these protrusions 11. Magnetic attraction magnets 12 are embedded in the joints between the protrusions 11 and the outer walls of the contour cavity 7. Through the magnetic force between the magnets 12 and the space separated by the protrusions 11, the contour cavity 7 can be easily connected and separated from the lower die base 6, allowing the contour cavity 7 to be replaced quickly and conveniently to meet the processing requirements of mobile phone cases of different shapes. First, the cylinder 21 is activated. When the piston rod contracts, it pulls the connecting block 22 to move. The connecting block 22 moves away from the guide rail crossbar 14, which drives the two sets of mutually symmetrically inclined lever arms 23 to move. Under the transmission pull of the lever arms 23, the two sets of displacement blocks 15 begin to slide along the guide rail crossbar 14. And they move in the direction of approaching each other. While the displacement block 15 slides, it will drive the clamping plate 19 at the top of the connecting vertical rod 18 to move synchronously through the connecting vertical rod 18 fixedly installed at its top. As the displacement blocks 15 approach each other, the clamping plates 19 on both sides also gradually approach each other, and eventually clamp the two ends of the mobile phone protective cover to be processed placed on the lower die base 6. In this process, the silicone gasket 20 fixedly installed on the clamping plate 19 can effectively prevent the surface of the workpiece from being clamped. At the same time, the pressure sensor provided on the clamping plate 19 will monitor the size of the clamping force in real time to avoid excessive clamping force that damages the workpiece, or too little clamping force that causes unstable positioning of the workpiece, thereby achieving a preliminary positioning of both ends of the workpiece that is stable and of appropriate force.
[0030] Servo motor 1 (9) is then activated. Rotation of the servo motor's output shaft drives the screw (8) in turn. Based on the principle of a screw, the displacement base (5) undergoes transverse axial movement along the Y-axis within the positioning groove (4) and rectangular opening (10) under the action of the screw (8). During this movement, the end of the displacement base (5) facing away from the bending frame (3) gradually approaches the inner wall of the positioning groove (4) facing away from the outlet, until they abut and engage. This moves the displacement base (5), its mounted lower die (6), the contour cavity (7), and the preliminarily positioned workpiece to the predetermined, designated position.
[0031] Servo motor 2 35 is then activated. When the output shaft rotates, it drives turntable 36, which in turn drives lever 3 37. Lever arm 4 38 is hinged to the opposite ends of lever arm 3 37. The rotation of lever arm 3 37 causes power arm 4 38 to move, which in turn pulls displacement block 2 33 to slide on limit bar 32. As displacement blocks 2 33 slide on limit bar 32 and approach each other, the four sets of transmission rods 34 drive the four sets of flip plates 31 to rotate synchronously around vertical axis 25. This in turn drives the four sets of vertical axis 25 to rotate, and in turn drives the clamping rods 26 fixed at their top ends, which are parallel to the sides of the displacement base 5. As the clamping rods 26 rotate, the clamping posts 29 on both sides move closer to the outer walls of the displacement base 5, ultimately clamping the two sides of the mobile phone case to be processed. During this process, the silicone sleeve 30 fixedly wrapped around the outside of the clamping column 29 can prevent the workpiece from being clamped. At the same time, the pressure sensor set on the clamping column 29 monitors the clamping force in real time to ensure that the secondary positioning of both sides of the workpiece is stable and of appropriate force, and then the workpiece is precisely and concentrically positioned directly below the punching group. At this time, the displacement base 5 and the lower die base 6 are also located directly below the punching group.
[0032] After the workpiece is precisely concentrically positioned by concentric positioning structures 1 and 2, the punching unit begins operation. The punching unit consists of a punching tool and a hydraulic cylinder. The hydraulic cylinder drives the punching tool downward, punching the mobile phone case workpiece placed in the contour cavity 7. The pressure provided by the hydraulic cylinder forces the punching tool to cut the workpiece according to the predetermined processing requirements, ultimately completing the task of producing the mobile phone case in the desired shape.
[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A punching and positioning mechanism for processing a mobile phone protective cover, characterized in that: include: A punching machine (1) is provided with a processing platform (2) thereon, a punching group consisting of a punching tool and a hydraulic cylinder is provided above the punching machine (1) corresponding to the processing platform (2), and a visual correction module consisting of an industrial camera and an LED light source is integrated on one side of the punching group; A bending frame (3) and a displacement base (5), wherein the bending frame (3) is fixedly mounted on one side of a processing platform (2), a positioning groove (4) is provided on the processing platform (2) and is fitted with the displacement base (5), a Y-axis transverse movement mechanism is provided between the bending frame (3) and the positioning groove (4), and the displacement base (5) has a degree of freedom of transverse and axial displacement between the processing platform (2) and the bending frame (3) through the Y-axis transverse movement structure; A lower die base (6) and a profiling cavity (7), wherein the lower die base (6) is fixedly mounted at the top center of the displacement base (5), a rectangular groove is provided at the top of the lower die base (6), and the profiling cavity (7) is filled in the rectangular groove, the displacement base (5), the lower die base (6), the profiling cavity (7) and the center points of the punching group are located on the same vertical line, and a magnetic connection structure is provided between the lower die base (6) and the profiling cavity (7); A concentric positioning structure 1 is provided on both ends of the lower die base (6) and a concentric structure 2 is provided on the processing platform (2). The concentric positioning structure 1 and the concentric structure 2 cooperate with each other to firmly clamp the two ends and both sides of the mobile phone protective cover to be processed.
2. A punching and positioning mechanism for processing a mobile phone protective cover according to claim 1, characterized in that: The top ends of the displacement base (5) and the bending frame (3) are flush with the processing platform (2); the positioning groove (4) is open at the end side close to the bending frame (3); and the end side of the displacement base (5) facing away from the bending frame (3) is in contact with the inner wall of the end side of the positioning groove (4) facing away from the opening end; the bending frame (3) is L-shaped and has a rectangular opening groove (10) at the horizontal top end; and the rectangular opening groove (10) is open at the end side of the bending frame (3) facing the punching machine (1).
3. A punching and positioning mechanism for processing a mobile phone protective cover according to claim 2, characterized in that: The Y-axis traverse structure includes a threaded screw (8) and a servo motor (9); Two sets of parallel threaded screws (8) are rotatably mounted between the positioning groove (4) and the inner wall of the rectangular opening groove (10) facing away from each other, and the displacement base (5) in the positioning groove (4) is threadedly sleeved on the two sets of threaded screws (8); Two sets of servo motors (9) are fixedly mounted on the end side of the bending frame (3) facing away from the punching machine (1), and the output shafts of the two sets of servo motors (9) pass through the side wall of the bending frame (3) and are respectively fixedly connected to the two sets of threaded screws (8).
4. A punching and positioning mechanism for processing a mobile phone protective cover according to claim 3, characterized in that: The magnetic connection structure comprises a protruding block (11) and a magnetic member (12); the lower die seat (6) is provided with an integrated protruding block (11) fixedly disposed in the middle of the four inner walls corresponding to the rectangular groove, and the four outer walls of the contoured cavity (7) are respectively fitted with the protruding blocks (11); The protruding blocks (11) on the four sides and the outer walls of the four sides of the contoured cavity (7) are all embedded with magnetically attracted magnets (12); The top of the profiling cavity (7) is flush with the top of the lower die base (6), and there is a space between the four inner walls of the profiling cavity (7) and the four inner walls of the lower die base (6) via the protruding blocks (11).
5. A punching and positioning mechanism for processing a mobile phone protective cover according to claim 4, characterized in that: The concentric positioning structure 1 includes two groups of displacement blocks 1 (15), a transverse displacement groove (17), a connecting vertical rod (18) and a clamping plate 1 (19). The upper half of the displacement base (5) is provided with a cavity groove 1 (13) and is in a cavity shape. A guide rail cross bar (14) is fixedly installed on the bottom inner wall of the cavity groove 1 (13) inside the displacement base (5). The guide rail cross bar (14) is located directly below the lower die base (6) and its center is located on the same vertical line. The bottom ends of the two groups of displacement blocks (15) are both provided with open-shaped notched square grooves (16) adapted to the guide rail cross bar (14), and the two groups of displacement blocks (15) are respectively slidably engaged with the two ends of the guide rail cross bar (14) through the notched square grooves (16); A transverse shift groove (17) is provided on the center line of the bottom ends of the lower die seat (6) corresponding to the top end of the displacement base (5), and the transverse shift groove (17) is communicated with the cavity groove 1 (13) and is located directly above the displacement block 1 (15); The top ends of the two groups of displacement blocks (15) are fixedly mounted with connecting vertical rods (18), and the two groups of connecting vertical rods (18) are respectively slidably engaged in the transverse displacement grooves (17) at both ends of the bottom of the lower die base (6); The top end of the connecting vertical rod (18) extends out of the transverse displacement groove (17) and is fixedly mounted with an integrated clamping plate (19), wherein the bottom end of the clamping plate (19) is lower than the top end of the lower die base (6), and the top end of the clamping plate (19) is higher than the top end of the lower die base (6); The clamping plates (19) on both sides of the lower die base (6) are symmetrical about the center line of the lower die base (6).
6. A punching and positioning mechanism for processing a mobile phone protective cover according to claim 5, characterized in that: The concentric positioning structure 1 further includes a cylinder (21), a connecting block (22) and a force arm rod 1 (23); the cylinder (21) is embedded in the cavity groove 1 (13) corresponding to the displacement base (5), and the cylinder (21) is located at the side of the displacement base (5) and perpendicular to the guide rail crossbar (14); The piston rod of the cylinder (21) faces the guide rail cross bar (14) and is fixedly mounted with a connecting block (22), there is a spacing between the connecting block (22) and the guide rail cross bar (14), and a powerful arm rod (23) is hinged between the end faces of the connecting block (22) and the side walls of the two groups of displacement blocks (15) on the guide rail cross bar (14). The two groups of lever arms (23) are symmetrically inclined with respect to each other; Silicone gaskets (20) are fixedly mounted on the side outer walls of the two groups of clamping plates (19) that are close to each other, and pressure sensors are provided on the two groups of clamping plates (19).
7. The punching and positioning mechanism for processing a mobile phone protective cover according to claim 4, characterized in that: The second concentric positioning structure comprises a vertical shaft (25), a clamping rod (26), a vertical base rod (27), a horizontal plate (28) and a clamping column (29), and the vertical shafts (25) are rotatably mounted on the outer sides of the four corners of the processing platform (2) corresponding to the displacement base (5), and the top ends of the four groups of vertical shafts (25) are fixedly mounted with clamping rods (26) parallel to the two sides of the displacement base (5), and the ends of the two groups of clamping rods (26) on the same side are opposite and close to each other; The ends of the four groups of clamping rods (26) are all fixedly mounted with vertical base rods (27), and the top ends of the vertical base rods (27) are fixedly mounted with horizontal cross plates (28); The two groups of horizontal plates (28) on both sides of the displacement base (5) are spaced apart in parallel, and the ends of the two groups of horizontal plates (28) on the same side face the outer walls of both sides of the displacement base (5), and the ends of the horizontal plates (28) facing the displacement base (5) are fixedly mounted with clamping columns (29) parallel to the vertical base rods (27).
8. The punching and positioning mechanism for processing a mobile phone protective cover according to claim 7, characterized in that: The bottom ends of the four groups of clamping columns (29) are flush with the top end of the lower die base (6), and the clamping columns (29) on both sides of the lower die base (6) are symmetrical about the vertical centerline of the lower die base (6); The outsides of the clamping columns (29) are all fixedly wrapped with silicone sleeves (30), and pressure sensors are provided on the four groups of clamping columns (29).
9. The punching and positioning mechanism for processing a mobile phone protective cover according to claim 7, characterized in that: The concentric positioning structure further comprises a flip plate (31), a limiting cross bar (32), a second displacement block (33) and a transmission rod (34); a second cavity groove (24) is provided below the punching machine (1) corresponding to the processing platform (2), and the bottom ends of the four sets of vertical shafts (25) all extend into the second cavity groove (24); The bottom ends of the four groups of vertical shafts (25) located in the second cavity groove (24) are all fixedly mounted with a flip plate (31), and the four groups of flip plates (31) are symmetrical about the vertical centerline of the lower die base (6), and the vertical shafts (25) and the flip plates (31) are L-shaped; A limiting cross bar (32) parallel to the clamping rod (26) is fixedly installed directly below the corresponding displacement base (5) in the second cavity groove (24); The limiting crossbar (32) is slidably sleeved on two sets of symmetrical displacement blocks (33), and a transmission rod (34) is hinged between each set of limiting crossbars (32) and two sets of flip plates (31) on the same end side that are away from each other; The two groups of transmission rods (34) on the displacement block 2 (33) are symmetrically inclined, and the four groups of transmission rods (34) are symmetrical about the vertical centerline of the lower die base (6).
10. The punching and positioning mechanism for processing a mobile phone protective cover according to claim 9, characterized in that: The concentric positioning structure further includes a servo motor 2 (35), a turntable (36), a force arm rod 3 (37) and a force arm rod 4 (38). The servo motor 2 (35) is embedded in the inner wall of the bottom of the cavity groove 2 (24) and is located just below the center of the limit cross bar (32). The top end of the output shaft of the servo motor 2 (35) faces the limit cross bar (32) and is fixedly mounted with the turntable (36). The two sides of the turntable (36) are fixedly mounted with force arm rods 3 (37) symmetrical about the center, and the two groups of force arm rods 3 (37) are hinged to force arm rods 4 (38) at their ends facing away from each other, and the free ends of the two groups of force arm rods 4 (38) are hinged to the bottom centers of the displacement blocks 2 (33) on both sides.