Middle frame side elastic piece assembling and welding mechanism

Abstract

The utility model discloses a middle frame side elastic piece assembling and welding machine which comprises a turnover mechanism (1), a middle frame positioning mechanism (2), an elastic piece assembling mechanism (3) and a welding mechanism, and preferably further comprises an elastic piece pressing mechanism (4). Middle frame feeding, elastic piece assembling and elastic piece welding are achieved by driving the operation table to turn over to different states, the operation table is in a horizontal state during feeding, the operation table can be turned over to a proper angle during elastic piece assembling, the elastic pieces are placed on the middle frame by moving the elastic pieces in the Y-axis direction and the Z-axis direction of the operation table, and the elastic pieces are welded to the middle frame. Complex rotation and movement of a mechanical arm are not needed in the process, the problem of interference of all structures can be solved, the operation table is rotated to the angle suitable for welding after assembling is completed, and in a word, automatic elastic piece assembling and welding can be achieved, the production efficiency is high, and the product yield is high.

Description

Technical Field

[0001] The utility model relates to the field of middle frame assembly of electronic products, in particular to a middle frame side spring piece assembly and welding mechanism. Background Art

[0002] Currently, the vast majority of electronic products on the market, such as mobile phones, contain internal springs of various sizes and materials, such as copper sheets. These springs are placed on the sides of the product's midframe to provide connectivity and electrical conductivity. The existing process for welding springs in metal midframes is as follows: A mobile phone's metal midframe is manually taken from a tray and placed in a welding jig, where the metal midframe is positioned using pins. A tweezers gripper is then used to place the springs into the midframe, where they are then clamped using a jaw-type clamping mechanism on the side of the welding jig. This clamping mechanism simultaneously secures the springs and secures the metal midframe. Once all the required springs are assembled, the jig is manually moved to a laser welding machine for welding. The small size of the springs makes gripping difficult, resulting in low efficiency and yield, and requiring extensive labor. There are also proposals to automate the process using a side-mounted welding machine. This involves first placing the springs onto a vacuum-loaded rotating arm, which then uses a servo motor to rotate the arm and press them into the metal midframe, where they are then welded. However, due to the large cumulative precision error between the swing arm and the metal middle frame, a large number of defects such as cold solder joints and misalignment occur when welding copper sheets. At the same time, due to the complex internal structure of the metal middle frame, there will also be interference between the rotating swing arm and the internal structure of the metal middle frame. In short, the current rotating swing arm solution still has problems with low production efficiency and low product yield.

[0003] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a middle frame side spring piece assembly welding machine to address the above-mentioned defects of low production efficiency and low product yield in the prior art, which can meet on-site requirements, has high production efficiency and ensures product yield.

[0005] The technical solution adopted by the utility model to solve the technical problem is to construct a middle frame side spring piece assembly welding machine, which includes:

[0006] A turning mechanism, comprising an operating table and a turning drive structure, wherein the turning drive structure is used to drive the operating table to turn to different states;

[0007] a middle frame positioning mechanism, mounted on the operating table, for positioning the middle frame when the operating table is in a horizontal state so that the middle frame is in a flat state relative to the operating table;

[0008] A spring assembly mechanism is disposed side by side on the operating table along the Y-axis direction of the operating table together with the middle frame positioning mechanism, and is used to assemble the spring after the operating table is flipped to a set first angle; the spring assembly mechanism includes: a spring positioning structure for positioning and placing the spring, and a spring transfer structure for driving the spring positioning structure to move linearly along the Y-axis and Z-axis directions of the operating table to transfer the spring to the side of the middle frame, the Y-axis direction of the operating table is parallel to the operating table and perpendicular to the flip center of the operating table, and the Z-axis direction of the operating table is perpendicular to the operating table;

[0009] The welding mechanism is used for welding the spring piece and the middle frame after the operating table is flipped to a set second angle.

[0010] Furthermore, in the middle frame side spring sheet assembly and welding machine described in the present invention, a spring sheet pressing mechanism is further included, which is arranged beside the operating table and is used to press the spring sheets after the spring sheets are assembled and before they are welded, and includes a pressing head for pressing the spring sheets on the side of the middle frame and a pressing drive structure for driving the pressing head to move linearly in a vertical direction;

[0011] Furthermore, in the middle frame side spring clip assembly welding machine described in the present invention, the flipping drive structure includes a support base, a flipping motor, a synchronous wheel, a synchronous belt, and a rotating shaft serving as the flipping center of the operating table. The rotating shaft is horizontally arranged and rotatably installed on the support base. A group of the synchronous wheels are respectively installed on the flipping motor and the rotating shaft and are linked by the synchronous belt. The bottom of the operating table is fixed to the rotating shaft so as to rotate with the rotating shaft.

[0012] Furthermore, in the middle frame side spring piece assembly welding machine described in the present invention, a first position detection component is fixed to the rotating shaft, and a second position detection component is installed on the support seat. The first position detection component and the second position detection component cooperate to realize the detection of the rotation angle of the rotating shaft.

[0013] Furthermore, in the middle frame side spring piece assembly welding machine of the present invention, the middle frame positioning mechanism includes an insulating middle frame jig plate fixed on the operating table for supporting the middle frame;

[0014] Wherein, the middle frame positioning mechanism also includes a clamping plate and a rotary clamping cylinder fixed on the operating table and located next to the middle frame jig plate, the rotary clamping cylinder is connected to the clamping plate, and the rotary clamping cylinder is used to rotate the clamping plate above the middle frame and press it after the middle frame is positioned and placed on the middle frame jig plate; or / and, the middle frame jig plate is connected to the vacuum equipment and has vacuum holes to achieve vacuum adsorption of the middle frame, and the vacuum air path connecting the middle frame jig plate and the vacuum equipment is also connected to the pressure switch to assist in detecting the presence or absence of the middle frame.

[0015] Furthermore, in the middle frame side spring piece assembly welding machine described in the utility model, the middle frame jig plate is provided with diagonally arranged middle frame positioning pins for matching the middle frame, and the top of the middle frame positioning pins is provided with a large chamfer for precise positioning of the middle frame; the contact part between the clamping plate and the middle frame is wrapped with non-metallic soft material to avoid scratching the middle frame.

[0016] Furthermore, in the middle frame side shrapnel assembly and welding machine described in the present invention, the shrapnel transplanting structure includes a Y-axis drive mechanism, a Y-axis linear guide rail, a Y-axis sliding mounting seat slidingly matched with the Y-axis linear guide rail, and a Z-axis drive mechanism fixedly mounted on the sliding mounting seat;

[0017] The Y-axis linear guide extends along the Y-axis direction of the operating table, the Y-axis driving mechanism is connected to the Y-axis sliding mounting seat and drives the Y-axis sliding mounting seat to slide along the Y-axis linear guide, and the Z-axis driving mechanism is connected to the spring clip positioning structure and drives the spring clip positioning structure to move along the Z-axis direction of the operating table.

[0018] Furthermore, in the middle frame side shrapnel assembly welding machine described in the present utility model, the Y-axis drive mechanism includes a support body fixed to the operating table, a first servo motor and a first screw module installed on the support body, the first servo motor is connected to the first screw module, and the first screw module is connected to the Y-axis sliding mounting seat; the Z-axis drive mechanism includes a slide module;

[0019] A third position detection component is installed on the side of the Y-axis linear guide rail, and a fourth position detection component is installed on the side of the Y-axis sliding mounting seat. The third position detection component and the fourth position detection component cooperate to realize the detection of the Y-axis moving distance; the shrapnel transplanting structure also includes a hydraulic buffer and a limit plate arranged on the slide module for limiting in the Z-axis direction.

[0020] Furthermore, in the middle frame side spring clip assembly and welding machine described in the present invention, the spring clip positioning structure includes a spring clip fixture plate parallel to the operating table, a first side of the spring clip fixture plate is fixed to the spring clip transfer structure, and a second side is provided with spring clip mounting positions whose number is the same as the number of spring clips, and the first side and the second side of the spring clip fixture plate refer to two opposite sides of the operating table in the Y-axis direction;

[0021] A vacuum groove is provided in the shrapnel fixture plate, and the shrapnel mounting position includes a vacuum adsorption hole connected to the vacuum groove and a group of shrapnel positioning pins arranged diagonally for positioning the shrapnel.

[0022] Furthermore, in the middle frame side spring piece assembly welding machine described in the present utility model, the clamping drive structure includes a second servo motor, a second screw module connected to the second servo motor, and a clamping shaft connected to the movable end of the second screw module, and the clamping shaft extends along the X-axis direction of the operating table;

[0023] The clamping shaft is provided with clamping claws whose number is the same as the number of the spring pieces. The clamping claws include the clamping head and a compression spring connected to the clamping head for eliminating the height error between the spring pieces.

[0024] The middle frame side shrapnel assembly and welding machine of the present invention has the following beneficial effects: the present invention does not require manual assembly of shrapnel, and in the entire assembly process, the middle frame loading, shrapnel assembly, and shrapnel welding are realized by driving the operating table to flip to different states. The operating table is in a horizontal state during loading. During assembly, the operating table can be flipped to a suitable angle and the shrapnel can be placed on the middle frame by moving it along the Y and Z axis directions of the operating table. This process does not require the complex rotation and movement of the robotic arm, and can also solve the problem of interference between various structures. After assembly is completed, the operating table can be rotated to an angle suitable for welding. In short, the present invention can realize automated shrapnel assembly and welding, with high production efficiency and high product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can obtain other drawings based on the provided drawings without inventive work.

[0026] Figure 1 This is a structural diagram of the middle frame side shrapnel assembly welding machine of the utility model;

[0027] Figure 2 It is a structural diagram of the flip mechanism;

[0028] Figure 3 It is a structural diagram of the middle frame positioning mechanism;

[0029] Figure 4 This is a diagram of the shrapnel being assembled to the side of the middle frame;

[0030] Figure 5 It is a structural diagram of the shrapnel assembly mechanism;

[0031] Figure 6 It is a schematic diagram of the state of the structure on the operating table when the operating table is in a horizontal state;

[0032] Figure 7 It is a structural diagram of the shrapnel pressing mechanism;

[0033] Among them, the reference numerals in the figures are:

[0034] 1. Flipping mechanism; 11. Operating table; 12. Flipping motor; 13. Synchronous pulley; 14. Synchronous belt; 15. Rotating shaft; 16. Deep groove ball bearing;

[0035] 2. Middle frame positioning mechanism; 21. Middle frame fixture plate; 22. Rotary clamping cylinder; 23. Pressing plate; 211. Middle frame positioning pin;

[0036] 3. Shrapnel assembly mechanism; 31. Shrapnel fixture plate; 32. First servo motor; 33. Coupling; 34. First screw module; 35. Y-axis sliding mounting seat; 36. Y-axis linear guide; 37. Slide module; 38. Hydraulic buffer; 39. Support body; 310. Third position detection member; 311. Fourth position detection member; 3101. Shrapnel positioning pin; 3102. Vacuum tank;

[0037] 4. Spring clamping mechanism; 41. Second servo motor; 42. Second screw module; 43. Clamping shaft; 44. Clamping claw; 45. Compression spring;

[0038] 5. Middle frame;

[0039] 6. Shrapnel. DETAILED DESCRIPTION

[0040] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings. Typical embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0041] refer to Figure 1 The middle frame side shrapnel assembly and welding machine of this embodiment includes a flip mechanism 1, a middle frame positioning mechanism 2, a shrapnel assembly mechanism 3, a shrapnel pressing mechanism 4 and a welding mechanism.

[0042] The following is a detailed description of each structure.

[0043] refer to Figure 2 The flip mechanism 1 includes an operating table 11 and a flip drive structure. The flip drive structure is used to drive the operating table 11 to flip to different states to achieve loading, spring assembly and spring welding. In this embodiment, the operating table 11 is in a horizontal state by default, at which time loading can be performed; when the operating table 11 is flipped to a first angle, the spring is assembled; and when the operating table 11 is flipped to a second angle, the spring is welded. The first angle and the second angle can be equal or different. In this embodiment, the first angle is preferably 90° and the second angle is preferably 45°.

[0044] Specifically, the flipping drive structure includes a support base, a flipping motor 12, a synchronous wheel 13, a synchronous belt 14, and a rotating shaft 15. A group of the synchronous wheels 13 are respectively installed on the rotating shaft of the flipping motor 12 and the rotating shaft 15, and are linked by the synchronous belt 14. The rotating shaft 15 is horizontally arranged and rotatably installed on a pair of side walls of the support base through deep groove ball bearings 16, and one end of the rotating shaft 15 extends from the side wall of the support base to install the synchronous wheel 13. The flipping motor 12 is a servo motor, which is located in the support base, and the rotating shaft of the flipping motor 12 extends from the side wall of the support base to install the synchronous wheel 13. The bottom of the operating table 11 is fixed to the rotating shaft 15 to rotate with the rotating shaft 15, and the rotating shaft 15 serves as the flipping center of the operating table 11. The two ends of the rotating shaft 15 are cylindrical, and the middle part that contacts the operating table 11 is not a complete cylinder, but a structure equivalent to a small arc cut off by a plane, so that the flat part can make surface contact with the operating table 11.

[0045] To prevent the motor from losing steps, a first position detector is fixed to the end of the rotating shaft 15, and a second position detector is mounted on the side wall of the support base. The first and second position detectors cooperate to detect the rotation angle of the rotating shaft 15. For example, the first and second position detectors can be an induction plate and a slot switch.

[0046] refer to Figure 3-4 The middle frame positioning mechanism 2 is installed on the operating table 11 and is used to position the middle frame 5 when the operating table 11 is in a horizontal state so that the middle frame 5 is in a flat state relative to the operating table 11.

[0047] The middle frame positioning mechanism 2 includes a middle frame jig plate 21 fixed on the operating table 11 for supporting the middle frame, a clamping plate 23, and a rotary clamping cylinder 22 fixed on the operating table 11 and located next to the middle frame jig plate 21. The middle frame jig plate 21 is specifically a bakelite board, which is fixed to the operating table 11 by screws. The middle frame jig plate 21 uses a contoured shallow groove to position the metal middle frame 5. Two diagonally arranged middle frame positioning pins 211 for matching the middle frame 5 are provided on the middle frame jig plate 21. The top of the middle frame positioning pin 211 has a large chamfer for precise positioning of the middle frame.

[0048] The rotary clamping cylinder 22 is connected to the pressing plate 23. The rotary clamping cylinder 22 is used to rotate the pressing plate 23 over the middle frame 5 and press it firmly after the middle frame is positioned on the middle frame fixture plate 21. The contact area of the pressing plate 23 with the middle frame 5 is coated with a non-metallic soft material, such as rubber, to prevent scratching the middle frame.

[0049] The middle frame fixture plate 21 is connected to the vacuum equipment and has vacuum holes to achieve vacuum adsorption of the middle frame. In theory, two circular holes and vacuum holes can be opened at the bottom of the profiling groove of the middle frame fixture plate 21, and the vacuum holes can be directly connected to the vacuum equipment, so that the bottom of the middle frame 5 can be directly adsorbed using the vacuum holes. In this embodiment, this is not the case. Instead, suction cups are installed in the two circular holes, and the air pipe connected to the suction cups is led out of the vacuum hole. The vacuum hole is only used to place the air pipe, and the air pipe is connected to the vacuum equipment. Preferably, a tee can be set in the vacuum air path to connect to the pressure switch, thereby assisting in the detection of the presence of the middle frame. For example, the air pipe, vacuum equipment, and pressure switch are respectively connected to the three interfaces of the tee. When the metal middle frame 5 is placed in the profiling groove of the middle frame fixture plate 21, the vacuum suction cup adsorbs the metal middle frame 5. At the same time, because a vacuum pressure gauge is installed on the vacuum pipeline, the presence of the middle frame can be detected by the pressure value of the vacuum pressure gauge. When the vacuum detects the presence of the middle frame 5 , the rotary clamping cylinder 22 rotates and presses down to clamp the bottom of the metal middle frame 5 .

[0050] Preferably, the rotary clamping cylinder 22 is provided with two magnetic switches, which are used to detect the specific lifting position and the specific rotation position of the rotary clamping cylinder 2 respectively.

[0051] refer to Figure 5-6 The spring assembly mechanism 3 and the middle frame positioning mechanism 2 are arranged side by side on the operating table 11 along the Y-axis direction of the operating table 11, and are used to assemble the spring 6 after the operating table 11 is flipped to a set first angle.

[0052] The shrapnel assembly mechanism 3 includes a shrapnel positioning structure for vertically positioning the shrapnel 6 along the Z-axis of the operating table 11, and a shrapnel transfer structure for driving the shrapnel positioning structure to move linearly along the Y-axis and Z-axis of the operating table 11 to transfer the shrapnel 6 to the side of the middle frame 5. The Y-axis of the operating table 11 is parallel to the operating table 11 and perpendicular to the rotation axis 15, which is the center of rotation of the operating table 11. The Z-axis of the operating table 11 is perpendicular to the operating table 11.

[0053] Specifically, refer to Figure 4 The spring clip positioning structure includes a spring clip fixture plate 31 parallel to the operating table 11. A first side of the spring clip fixture plate 31 is fixed to the spring clip transfer structure, and a second side is provided with spring clip mounting positions equal in number to the number of spring clips. In this embodiment, there are multiple spring clip mounting positions, which are evenly spaced along the X-axis of the operating table 11. The first and second sides of the spring clip fixture plate 31 refer to opposite sides of the operating table 11 in the Y-axis direction.

[0054] Furthermore, the shrapnel fixture plate 31 has a vacuum groove 3102 formed within it. The shrapnel mounting area includes a vacuum suction hole connected to the vacuum groove 3102 and a set of shrapnel locating pins 3101 arranged diagonally to position the shrapnel 6 diagonally. The locating pins 3101 are embedded in the shrapnel fixture plate 31 or directly milled from the shrapnel fixture plate 31. Vacuum suction holes are located next to the locating pins 3101 and can be opened depending on the number of shrapnels to be welded. The vacuum groove 3102 is connected to the vacuum equipment.

[0055] Specifically, the spring clip transfer structure includes a Y-axis drive mechanism, two Y-axis linear guides 36, a Y-axis sliding mount 35 that slides with each of the two Y-axis linear guides 36, and a Z-axis drive mechanism fixedly mounted on the slide mounts. The Y-axis linear guides 36 extend along the Y-axis of the operating table 11. The Y-axis drive mechanism is connected to the Y-axis sliding mount 35 and drives the Y-axis sliding mount 35 to slide along the Y-axis linear guides 36. The Z-axis drive mechanism is connected to the spring clip fixture plate 31 and drives the spring clip fixture plate 31 to move along the Z-axis of the operating table 11.

[0056] More specifically, the Y-axis drive mechanism includes a support body 39 fixed on the operating table 11, a first servo motor 32 and a high-precision first screw module 34 installed on the support body 39, the first servo motor 32 is connected to the first screw module 34 through a bearing 33, the first screw module 34 is connected to the Y-axis sliding mounting seat 35, the two bottom ends of the Y-axis sliding mounting seat 35 are connected to two sliders on two Y-axis linear guides 36, and the sliders slide in conjunction with the Y-axis linear guides 36.

[0057] The Z-axis drive mechanism includes a precision slide module 37. A hydraulic buffer 38 and a limit plate are mounted on the slide module 37 to limit the Z-axis position. The hydraulic buffer 38 and the limit plate are positioned opposite each other in the Z-axis direction, with one moving with the moving parts of the slide module 37 while the other remains stationary.

[0058] Two third position detection members 310 are mounted beside the Y-axis linear guide 36, spaced apart along the Y-axis. A fourth position detection member 311 is mounted to the side of the Y-axis sliding mount 35. The third and fourth position detection members 310 and 311 cooperate to detect the Y-axis travel distance. For example, the fourth and third position detection members 311 and 310 may be a sensor and a slot switch. By detecting the Y-axis travel distance, homing and travel limit can be achieved.

[0059] It can be understood that the spring piece transplanting structure described in this embodiment fixes the structure related to movement in the Z-axis direction on the structure related to movement in the Y-axis direction. Of course, in theory, the structure related to movement in the Y-axis direction can also be fixed on the structure related to movement in the Z-axis direction.

[0060] refer to Figure 7 The spring clip pressing mechanism 4 is arranged beside the operating table 11, and is used to press the spring clip 6 after the spring clip is assembled and before it is welded. It includes a pressing head for pressing the spring clip 6 on the side of the middle frame 5 and a pressing drive structure for driving the pressing head to move linearly in the vertical direction.

[0061] The clamping drive structure includes a second servo motor 41, a second screw module 42 connected to the second servo motor 41, and a clamping shaft 43 connected to the movable end of the second screw module 42. The clamping height can be adjusted by the second servo motor 41. The clamping shaft 43 extends along the X-axis direction of the operating table 11. A group of clamping claws 44 are installed on the clamping shaft 43, and the clamping claws 44 are rotated and installed on the clamping shaft 43 and then locked. When installing the clamping claws 44, first rotate the clamping claws 44 to a suitable angle. At the same time, the position of the clamping claws 44 can be adjusted according to needs. After adjustment, lock it so that it cannot rotate. The clamping claws 44 include the clamping head and a compression spring 45 connected to the clamping head. The number and spacing of the clamping claws 44 need to be determined based on the number of shrapnel 6 to be welded on the side of the mobile phone middle frame 5 and the spacing of the shrapnel 6. According to general experience, it is best to weld 3 to 4 shrapnel 6 on one side. Since the pressing claw 44 is provided with a compression spring 45 , the compression spring 45 can absorb the height unevenness error of the middle frame 5 .

[0062] The welding mechanism is not shown in this embodiment. It is an existing mechanism and can be specifically sampled as a laser welding device. It only needs to be set at a suitable position, such as above the middle frame positioning mechanism 2, and the spring piece 6 and the middle frame 5 are welded after the operating table 11 is flipped to the set second angle.

[0063] The working principle of this embodiment is:

[0064] During the middle frame loading stage, the operating table 11 is kept horizontal to facilitate the robot outside the machine to place the middle frame on the middle frame fixture plate 21;

[0065] During the shrapnel assembly stage, the motor 12 drives the rotating shaft 15 to flip the operating table 11 90 degrees to a vertical layout, making it easier for the shrapnel manipulator (such as a 4-axis robot) to place the shrapnel into the shrapnel fixture plate 31. The specific assembly process is as follows: When the shrapnel manipulator places the taken shrapnel 6 onto the shrapnel fixture plate 31, the vacuum is turned on to adsorb the metal shrapnel 6 to prevent the metal shrapnel 6 from falling off. The metal shrapnel 6 begins to be assembled. In the Y-axis direction, the Y-axis screw module 34 retreats, so that the metal shrapnel 6 is close to the side wall of the mobile phone middle frame 5. At the same time, in the Z-axis direction, the slide module 37 cylinder descends, so that the metal shrapnel 6 is close to the bottom of the mobile phone middle frame 5. At this point, the metal shrapnel 6 is assembled. After the metal shrapnel is assembled and welded, the shrapnel pull-out force needs to be measured. According to experience, it is about 10N. In order to achieve this pull-out force, the metal shrapnel needs to be pressed before laser welding. The shrapnel pressing mechanism plays this role.

[0066] During the laser welding stage of the shrapnel, the rotating plate is rotated 45° to facilitate the vertical laser welding of the middle frame shrapnel.

[0067] After the metal shrapnel is assembled and welded, the pull-out force of the shrapnel needs to be measured. According to experience, it is about 10N. In order to achieve this pull-out force, the metal shrapnel needs to be pressed before laser welding. The shrapnel pressing mechanism 4 plays this role. Specifically, after the shrapnel is assembled, the servo motor of the middle frame rotation mechanism rotates 45° to make the rotating plate 45°. At this time, welding is not performed first. Instead, the shrapnel pressing mechanism 4 is lowered first, and the pressing claw 44 is lowered at the same time to press the metal shrapnel 6. After the pressing is completed, the shrapnel pressing mechanism 4 is reset. At this time, the slide module 37 rises and resets, and the Y-axis screw module 34 retreats and resets. The laser welder can weld the metal shrapnel.

[0068] To sum up, the middle frame side shrapnel assembly and welding machine of the utility model has the following beneficial effects: the present invention does not require manual assembly of shrapnel, thereby shortening the production cycle, improving production capacity efficiency, and reducing product welding defect rate, saving production costs; and in the entire assembly process, the middle frame loading, shrapnel assembly, and shrapnel welding are realized by driving the operating table to flip to different states. The operating table is in a horizontal state during loading. During assembly, the operating table can be flipped to a suitable angle and the shrapnel can be placed on the middle frame by moving it along the Y and Z axis directions of the operating table. This process does not require the complex rotation and movement of the robotic arm, and can also solve the problem of interference between various structures. After assembly, the operating table can be rotated to a suitable angle for welding. In short, the present invention can realize automated shrapnel assembly and welding, with high production efficiency and high product yield.

[0069] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0071] Terms containing ordinal numbers, such as "first" and "second," used in this specification may be used to describe various components, but these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component may be named a second component, and similarly, a second component may be named a first component, without departing from the scope of the present invention.

[0072] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A middle frame side spring piece assembly welding machine, characterized in that: include: A turning mechanism (1) comprises an operating table (11) and a turning drive structure, wherein the turning drive structure is used to drive the operating table (11) to turn to different states; A middle frame positioning mechanism (2) is installed on the operating table (11) and is used to position the middle frame when the operating table (11) is in a horizontal state so that the middle frame is in a horizontal state relative to the operating table (11); A spring assembly mechanism (3) is arranged side by side on the operating table (11) along the Y-axis direction of the operating table (11) together with the middle frame positioning mechanism (2), and is used to assemble the spring after the operating table (11) is flipped to a set first angle; the spring assembly mechanism (3) comprises: a spring positioning structure for positioning and placing the spring, and a spring transfer structure for driving the spring positioning structure to move linearly along the Y-axis direction and the Z-axis direction of the operating table (11) to achieve the transfer of the spring to the side of the middle frame, the Y-axis direction of the operating table (11) is parallel to the operating table (11) and perpendicular to the flip center of the operating table (11), and the Z-axis direction of the operating table (11) is perpendicular to the operating table (11); The welding mechanism is used for welding the spring piece and the middle frame after the operating table (11) is flipped to a set second angle.

2. The middle frame side spring piece assembly welding machine according to claim 1, characterized in that: It also includes a spring sheet pressing mechanism (4), which is arranged beside the operating table (11) and is used to press the spring sheet after the spring sheet is assembled and before welding; The spring sheet pressing mechanism (4) comprises a pressing head for pressing the spring sheet on the side of the middle frame and a pressing drive structure for driving the pressing head to move linearly in a vertical direction.

3. The middle frame side spring piece assembly welding machine according to claim 1, characterized in that: The flip driving structure comprises a support base, a flip motor (12), a synchronous wheel (13), a synchronous belt (14), and a rotating shaft (15) serving as the flip center of the operating table (11); the rotating shaft (15) is horizontally arranged and rotatably mounted on the support base; a group of synchronous wheels (13) are respectively mounted on the flip motor (12) and the rotating shaft (15) and are linked by the synchronous belt (14); the bottom of the operating table (11) is fixed to the rotating shaft (15) so as to rotate with the rotating shaft (15).

4. The middle frame side spring piece assembly welding machine according to claim 3, characterized in that: A first position detection component is fixed to the rotating shaft (15), and a second position detection component is installed on the support seat. The first position detection component cooperates with the second position detection component to detect the rotation angle of the rotating shaft (15).

5. The middle frame side spring piece assembly welding machine according to claim 1, characterized in that: The middle frame positioning mechanism (2) comprises an insulating middle frame fixture plate (21) fixed on the operating table (11) for supporting the middle frame; Wherein, the middle frame positioning mechanism (2) further includes a clamping plate (23) and a rotary clamping cylinder (22) fixed on the operating table (11) and located beside the middle frame fixture plate (21), the rotary clamping cylinder (22) being connected to the clamping plate (23), and the rotary clamping cylinder (22) being used to rotate the clamping plate (23) above the middle frame and clamp it after the middle frame is positioned and placed on the middle frame fixture plate (21); or / and, the middle frame fixture plate (21) is connected to a vacuum device and has a vacuum hole groove to realize vacuum adsorption of the middle frame, and the vacuum air path connecting the middle frame fixture plate (21) and the vacuum device is also connected to a pressure switch to assist in detecting the presence or absence of the middle frame.

6. The middle frame side spring piece assembly welding machine according to claim 5, characterized in that: The middle frame fixture plate (21) is provided with diagonally arranged middle frame positioning pins (211) for matching with the middle frame, and the tops of the middle frame positioning pins (211) are provided with large chamfers for precise positioning of the middle frame; the contact portion of the pressing plate (23) with the middle frame is covered with a non-metallic soft material to avoid scratching the middle frame.

7. The middle frame side spring piece assembly welding machine according to claim 1, characterized in that: The shrapnel transplanting structure includes a Y-axis driving mechanism, a Y-axis linear guide rail (36), a Y-axis sliding mounting seat (35) slidingly matched with the Y-axis linear guide rail (36), and a Z-axis driving mechanism fixedly mounted on the sliding mounting seat; The Y-axis linear guide rail (36) extends along the Y-axis direction of the operating table (11); the Y-axis driving mechanism is connected to the Y-axis sliding mounting seat (35) and drives the Y-axis sliding mounting seat (35) to slide along the Y-axis linear guide rail (36); and the Z-axis driving mechanism is connected to the spring clip positioning structure and drives the spring clip positioning structure to move along the Z-axis direction of the operating table (11).

8. The middle frame side spring piece assembly welding machine according to claim 7, characterized in that: The Y-axis drive mechanism includes a support body (39) fixed on the operating table (11), a first servo motor (32) and a first screw module (34) mounted on the support body (39), the first servo motor (32) being connected to the first screw module (34), and the first screw module (34) being connected to the Y-axis sliding mounting seat (35); the Z-axis drive mechanism includes a slide module (37); A third position detection component (310) is installed on the side of the Y-axis linear guide rail (36), and a fourth position detection component (311) is installed on the side of the Y-axis sliding mounting seat (35). The third position detection component (310) and the fourth position detection component (311) cooperate to realize the detection of the Y-axis moving distance; the shrapnel transplanting structure also includes a hydraulic buffer (38) and a limit plate arranged on the slide module (37) for limiting in the Z-axis direction.

9. The middle frame side spring piece assembly welding machine according to claim 1, characterized in that: The shrapnel positioning structure comprises a shrapnel fixture plate (31) parallel to the operating table (11), a first side of the shrapnel fixture plate (31) is fixed to the shrapnel transfer structure, and a second side is provided with shrapnel mounting positions having a number that is the same as the number of shrapnel, and the first side and the second side of the shrapnel fixture plate (31) refer to two opposite sides in the Y-axis direction of the operating table (11); A vacuum groove (3102) is provided in the shrapnel fixture plate (31), and the shrapnel mounting position includes a vacuum adsorption hole connected to the vacuum groove (3102) and a group of shrapnel positioning pins (3101) arranged diagonally for positioning the shrapnel.

10. The middle frame side spring piece assembly welding machine according to claim 2, characterized in that: The clamping drive structure comprises a second servo motor (41), a second screw module (42) connected to the second servo motor (41), and a clamping shaft (43) connected to the movable end of the second screw module (42), wherein the clamping shaft (43) extends along the X-axis direction of the operating table (11); The clamping shaft (43) is provided with clamping claws (44) whose number is the same as the number of the spring pieces. The clamping claws (44) include the clamping head and a compression spring (45) connected to the clamping head for eliminating height errors between the spring pieces.

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