Accurate positioning and pressing device for welding middle plate and frame

Abstract

This utility model relates to the field of welding technology, and in particular to a precise positioning and clamping device for welding the middle plate and frame. The technical solution includes: a machine body with a cover and a feeding mechanism on it. The feeding mechanism has a feeding robotic arm and a unloading robotic arm on each side, both coaxial. One side of the unloading robotic arm is a welding mechanism, and the other side is the unloading mechanism. A clamping mechanism is located between the welding mechanism and the unloading robotic arm. In the clamping mechanism, the cover can move horizontally and has multiple positioning fixtures to fix the workpiece. A cylinder is mounted above the positioning fixtures, and its output end is connected to a pressure plate with a limiting plate. The limiting plate has through holes corresponding to the welding positions of the workpieces. The welding mechanism has a first linear module that can move laterally, on which the welding laser head aligns its welding path with the through holes. This utility model, through precise positioning and effective clamping, ensures accurate welding position, improves welding quality, reduces defect rate, and increases production efficiency and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a precise positioning and clamping device for welding the middle plate and middle frame. Background Technology

[0002] The welding of the mid-plate and mid-frame of a mobile phone is a crucial step in the manufacturing process. Utilizing high-precision laser welding technology, it securely and precisely connects the two core components, the mid-plate and mid-frame, together. During the welding process, parameters such as temperature, welding speed, and laser power require extremely precise control to ensure the weld reaches the ideal depth and width, achieving seamless fusion. This ensures the weld strength is sufficient to withstand drops and pressure during daily use, while also maintaining a smooth and aesthetically pleasing appearance, preventing defects such as weld protrusions or dents that could negatively impact the overall quality of the phone. This lays a solid foundation for subsequent assembly and stable operation.

[0003] In existing welding equipment, workpiece positioning is a critical factor affecting welding quality. Traditional positioning methods often use one or a few positioning fixtures to fix the workpiece, but this layout has significant drawbacks. Due to the limited number of positioning points, it is impossible to comprehensively and effectively restrict the workpiece's translational and rotational degrees of freedom in the plane, leading to easy positional displacement of the workpiece during welding. For example, when welding irregularly shaped or large workpieces, a single positioning fixture cannot constrain the workpiece from multiple key positions. Under the action of welding forces, the workpiece may experience slight movement, resulting in welding errors, such as incomplete welds or misaligned welds, which seriously affect the consistency of welding quality and the product yield. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a precise positioning and clamping device for welding the middle plate and middle frame, thus solving the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows:

[0006] The precise positioning and clamping device for welding the middle plate and frame includes:

[0007] The machine body, the machine cover located on the top of the machine body, the feeding mechanism located on the machine body, the unloading robotic arm located on one side of the feeding mechanism, the feeding robotic arm located on the other side of the feeding mechanism, the welding mechanism located on the side of the unloading robotic arm away from the feeding mechanism, the unloading mechanism located on the side of the feeding robotic arm away from the feeding mechanism, and the clamping mechanism located between the welding mechanism and the unloading robotic arm.

[0008] The loading robot arm and the unloading robot arm are located on the same axis;

[0009] The clamping mechanism includes:

[0010] A horizontally movable protective cover, the lower surface of which is slidably mounted on a guide rail via a slider;

[0011] Multiple positioning fixtures evenly distributed on the protective cover are used to fix the workpiece to be welded;

[0012] The cylinder mounted on the positioning fixture has a pressure plate connected to its output end;

[0013] A limiting plate fixed to the bottom of the pressure plate has a through hole corresponding to the welding position of the workpiece.

[0014] The welding mechanism includes a first linear module that can move laterally and a welding laser head mounted thereon, wherein the welding path of the welding laser head is aligned with the through hole position of the limiting plate.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the movement of the protective cover is driven by a motor, the lead screw of which is connected to a lead screw seat, the lead screw seat is fixedly connected to the protective cover, and guide rails are provided on both sides of the lead screw seat to guide the movement of the protective cover.

[0017] The beneficial effects of adopting the above-mentioned further solutions are:

[0018] The motor drives the lead screw to rotate, converting the rotational motion into linear motion of the lead screw nut, which in turn moves the protective cover horizontally. This driving method features high transmission precision and smooth movement, allowing for precise control of the protective cover's position and speed. Guide rails on both sides of the lead screw nut provide guidance and support, ensuring the protective cover maintains linear motion during movement without deviation or wobbling, thus improving the stability and reliability of the cover's movement. Simultaneously, this design allows the protective cover to be flexibly adjusted according to different workpiece sizes and loading positions, increasing the adaptability and flexibility of the device and providing better conditions for subsequent precise workpiece positioning and clamping.

[0019] Furthermore, the number of positioning fixtures is four, and they are evenly distributed along the surface of the protective cover.

[0020] The beneficial effects of adopting the above-mentioned further solutions are:

[0021] Four positioning fixtures are evenly distributed on the surface of the protective cover, enabling them to constrain and fix the workpiece at multiple key locations. This layout effectively restricts the workpiece's translational and rotational freedom within the plane, maintaining a stable position in the horizontal direction. Compared to single or a few positioning fixtures, four evenly distributed fixtures provide a more comprehensive and reliable positioning effect, significantly improving the accuracy and stability of workpiece positioning. During welding, this reduces welding errors caused by workpiece positional deviations, ensuring consistent welding quality and increasing the product yield.

[0022] Furthermore, the welding mechanism also includes a second linear module, on which the first linear module is slidably mounted, enabling the welding laser head to achieve a combined lateral and longitudinal motion.

[0023] The beneficial effects of adopting the above-mentioned further solutions are:

[0024] The introduction of the second linear module allows the first linear module to move longitudinally along it, while the first linear module itself can move laterally, thus enabling the welding laser head to perform combined lateral and longitudinal motion. This combined motion greatly expands the working range of the welding laser head, allowing it to cover welding areas of different positions and shapes on the workpiece. Welding of multiple parts of the workpiece can be completed without frequent workpiece movement, improving welding efficiency and the degree of automation in production. Simultaneously, precise control of the movement of the two linear modules allows for accurate planning of the welding path, meeting the welding needs of workpieces with different complex shapes and improving the versatility and adaptability of the device.

[0025] Furthermore, the protective cover is provided with baffles at both ends, and is sealed to the baffles by a dust cover.

[0026] The beneficial effects of adopting the above-mentioned further solutions are:

[0027] The baffles at both ends of the protective cover serve to block and protect against welding spatter, sparks, and dust generated during the welding process, preventing them from entering the cover and protecting critical components such as positioning fixtures and cylinders from damage. The sealed connection between the dust cover and the baffles further enhances the protective effect, creating a relatively enclosed space that reduces the possibility of external dust and debris entering the cover. This not only helps keep the internal components clean and extends their service life but also reduces component failures and wear caused by dust and spatter, improving the reliability and stability of the device and reducing equipment maintenance frequency and costs.

[0028] Furthermore, the number and position of the pressure plates correspond one-to-one with the welding laser head, and when the pressure plates are pressed down, the through holes of their limiting plates ensure that the welding position of the workpiece is precisely exposed below the welding laser head.

[0029] The beneficial effects of adopting the above-mentioned further solutions are:

[0030] The design, with a one-to-one correspondence between the number and position of the pressure plates and the welding laser heads, ensures that each welding laser head has a corresponding pressure plate to clamp and position the workpiece. During the downward pressing process, the through holes in the limiting plates precisely expose the welding position on the workpiece, allowing the welding laser head to accurately target the predetermined welding area. This precise correspondence avoids welding deviations and incomplete welds, improving welding quality and reliability. Simultaneously, the through holes in the limiting plates also guide the welding path of the welding laser head, ensuring the stability and consistency of the welding process, further improving the welding precision and quality of the product.

[0031] This utility model provides a precise positioning and clamping device for welding the middle plate and middle frame. It has the following beneficial effects:

[0032] The protective cover is evenly equipped with multiple positioning fixtures for fixing the workpiece to be welded. There are four positioning fixtures evenly distributed along the surface of the cover. This layout constrains the workpiece from multiple key locations, utilizing the principle of mechanical positioning to form a stable positioning system through multiple positioning points. Each positioning fixture matches a specific part of the workpiece. When the workpiece is placed on the positioning fixture, its translational and rotational degrees of freedom in the plane are effectively restricted, thereby ensuring the horizontal positional accuracy of the workpiece.

[0033] A limiting plate fixed to the bottom of the pressure plate has through holes corresponding to the welding positions of the workpiece. The number and position of the pressure plates correspond one-to-one with the welding laser head. When the pressure plates are pressed down, the through holes of the limiting plates ensure that the welding position of the workpiece is precisely exposed below the welding laser head. This is achieved through precise design and manufacturing, ensuring that the position of the through holes in the limiting plates is highly matched with the actual welding position of the workpiece and the movement trajectory of the welding laser head. During the pressing process, the limiting plates play a guiding and positioning role, ensuring that the welding laser head can accurately act on the welding area of ​​the workpiece.

[0034] A cylinder mounted above the positioning fixture has a pressure plate connected to its output end. The cylinder uses compressed air as its power source, and by controlling the air intake and exhaust volume, it achieves linear reciprocating motion at its output end. When the cylinder output end moves downwards, it drives the pressure plate downwards, and the limiting plate at the bottom of the pressure plate gradually approaches the workpiece, ultimately pressing the workpiece firmly onto the positioning fixture. The welding path of the welding laser head is aligned with the through-hole position of the limiting plate. This is achieved through precise mechanical design and a control system. During the assembly and debugging of the device, the movement trajectory of the welding laser head and the position of the through-hole in the limiting plate are precisely calibrated and adjusted to ensure accurate spatial correspondence. During welding, the control system controls the welding laser head to move along the aligned path according to a preset program, while simultaneously guiding the welding position precisely through the through-hole in the limiting plate.

[0035] The protective cover can move horizontally, driven by a motor. The motor's lead screw is connected to a lead screw nut, which is fixedly connected to the protective cover. Guide rails on both sides of the lead screw nut guide the movement of the protective cover. The motor's rotation drives the lead screw to rotate, converting the rotational motion into linear motion of the lead screw nut, thus moving the protective cover horizontally along the guide rails. Before clamping, the protective cover can be moved to a suitable position, allowing the positioning fixture to better align with the workpiece placed by the loading robot arm, preparing for the subsequent clamping operation. Baffles are located at both ends of the protective cover, sealed to them by dust covers. The baffles serve to block and protect against welding spatter and dust from entering the protective cover, protecting the positioning fixture and cylinders from damage. The dust covers further enhance the sealing effect, preventing dust and debris from entering from both ends of the protective cover, while also reducing friction and collisions with the external environment during movement. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0037] In the attached diagram:

[0038] Figure 1 This is a schematic diagram of the main appearance of the present utility model;

[0039] Figure 2 This is a schematic diagram of the external appearance of the body of this utility model;

[0040] Figure 3 This is a schematic diagram of the welding mechanism of this utility model.

[0041] Figure 4 This is an exploded view of the pressing mechanism of this utility model;

[0042] Figure 5 This is a bottom-view exploded structural diagram of the clamping mechanism of this utility model.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Machine cover; 2. Machine body; 201. Feeding mechanism; 202. Unloading mechanism; 203. Feeding robotic arm; 204. Welding mechanism; 2041. First linear module; 2042. Second linear module; 2043. Welding laser head; 205. Clamping mechanism; 2051. Baffle; 20510. Slider; 20511. Limit plate; 2052. Positioning fixture; 2053. Protective cover; 2054. Pressure plate; 2055. Dust cover; 2056. Motor; 2057. Thread nut; 2058. Guide rail; 2059. Cylinder; 206. Unloading robotic arm. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] Please see Figures 1 to 5 As shown, the embodiments provided by this utility model are as follows:

[0047] Example 1

[0048] The precise positioning and clamping device for welding the middle plate and frame includes:

[0049] The machine body 2, the machine cover 1 located above the machine body 2, the feeding mechanism 201 located on the machine body 2, the unloading robotic arm 206 located on one side of the feeding mechanism 201, the feeding robotic arm 203 located on the other side of the feeding mechanism 201, the welding mechanism 204 located on the side of the unloading robotic arm 206 away from the feeding mechanism 201, the unloading mechanism 202 located on the side of the feeding robotic arm 203 away from the feeding mechanism 201, and the clamping mechanism 205 located between the welding mechanism 204 and the unloading robotic arm 206;

[0050] Among them, the loading robotic arm 203 and the unloading robotic arm 206 are located on the same axis;

[0051] The clamping mechanism 205 includes:

[0052] A horizontally movable protective cover 2053 has its lower surface slidably mounted on a guide rail 2058 via a slider 20510;

[0053] Multiple positioning fixtures 2052 evenly distributed on the protective cover 2053 are used to fix the workpiece to be welded;

[0054] The cylinder 2059, mounted on the positioning fixture 2052, has a pressure plate 2054 connected to its output end;

[0055] A limiting plate 20511 is fixed to the bottom of the pressure plate 2054. The limiting plate 20511 has a through hole corresponding to the welding position of the workpiece.

[0056] The welding mechanism 204 includes a first linear module 2041 that can move laterally and a welding laser head 2043 mounted thereon. The welding path of the welding laser head 2043 is aligned with the through hole position of the limiting plate 20511.

[0057] Example 2

[0058] To improve the accuracy and stability of the protective cover movement and the adaptability of the device to different workpieces, for example, such as Figures 1 to 5 As shown, this utility model also includes:

[0059] The movement of the protective cover 2053 is driven by a motor 2056. The lead screw of the motor 2056 is connected to a lead screw seat 2057, which is fixedly connected to the protective cover 2053. Guide rails 2058 are provided on both sides of the lead screw seat 2057 to guide the movement of the protective cover 2053. The motor 2056 drives the lead screw to rotate, converting the rotational motion into linear motion of the lead screw seat 2057, thereby driving the protective cover 2053 to move horizontally. This driving method features high transmission precision and smooth movement, enabling precise control of the protective cover 2053's position and speed. The guide rails 2058 on both sides of the lead screw seat 2057 provide guidance and support, ensuring that the protective cover 2053 maintains linear motion during movement, preventing deviation or wobbling, thus improving the stability and reliability of the protective cover 2053's movement. Simultaneously, this design allows the protective cover 2053 to be flexibly adjusted according to different workpiece sizes and loading positions, increasing the adaptability and flexibility of the device and providing better conditions for subsequent precise positioning and clamping of the workpiece.

[0060] Four positioning fixtures 2052 are evenly distributed along the surface of the protective cover 2053. This distribution allows for constraint and fixation of the workpiece from multiple key positions. This layout effectively restricts the workpiece's translational and rotational freedom in the plane, maintaining a stable horizontal position. Compared to a single or a few positioning fixtures 2052, four evenly distributed fixtures provide a more comprehensive and reliable positioning effect, significantly improving the accuracy and stability of workpiece positioning. During welding, this reduces welding errors caused by workpiece positional deviations, ensuring consistent welding quality and increasing product yield.

[0061] The protective cover 2053 has baffles 2051 at both ends, which are sealed to the baffles 2051 by dust covers 2055. The baffles 2051 at both ends of the protective cover 2053 can block and protect against spatter, sparks and dust generated during welding, preventing them from entering the interior of the protective cover 2053 and protecting key components such as the positioning fixture 2052 and the cylinder 2059 from damage. The sealed connection between the dust cover 2055 and the baffles 2051 further enhances the protective effect, forming a relatively enclosed space and reducing the possibility of external dust and debris entering the protective cover 2053. This not only helps to keep the internal components of the protective cover 2053 clean and extend their service life, but also reduces component failure and wear caused by dust and spatter, improves the reliability and stability of the device, and reduces the frequency and cost of equipment maintenance.

[0062] Example 3

[0063] To expand the working range of the welding laser head, improve welding efficiency, and ensure welding accuracy, for example, such as Figures 1 to 5 As shown, this utility model also includes:

[0064] The welding mechanism 204 also includes a second linear module 2042. The first linear module 2041 is slidably mounted on the second linear module 2042, enabling the welding laser head 2043 to achieve a combined lateral and longitudinal movement. The introduction of the second linear module 2042 allows the first linear module 2041 to move longitudinally along it, while the first linear module 2041 itself can also move laterally, thus giving the welding laser head 2043 the ability to perform combined lateral and longitudinal movements. This combined movement greatly expands the working range of the welding laser head 2043, enabling it to cover welding areas of different positions and shapes on the workpiece. Welding of multiple parts of the workpiece can be completed without frequent workpiece movement, improving welding efficiency and the degree of automation in production. At the same time, by precisely controlling the movement of the two linear modules, precise planning of the welding path can be achieved, meeting the welding needs of workpieces with different complex shapes, and improving the versatility and adaptability of the device. The number and position of the pressure plates 2054 correspond one-to-one with the welding laser heads 2043. When the pressure plates 2054 are pressed down, the through holes of their limiting plates 20511 precisely expose the workpiece welding position below the welding laser heads 2043. This one-to-one correspondence between the number and position of the pressure plates 2054 and the welding laser heads 2043 ensures that each welding laser head 2043 has a corresponding pressure plate 2054 to clamp and position the workpiece. During the pressing process of the pressure plates 2054, the through holes of the limiting plates 20511 accurately expose the workpiece welding position, allowing the welding laser heads 2043 to accurately act on the predetermined welding area. This precise correspondence avoids welding deviations and incomplete welds, improving welding quality and reliability. Simultaneously, the through holes of the limiting plates 20511 also guide the welding path of the welding laser heads 2043, ensuring the stability and consistency of the welding process, further improving the welding precision and quality of the product.

[0065] Working principle:

[0066] The loading mechanism 201 transports the middle plate frame workpiece to be welded to the designated position. The loading robotic arm 203 then moves to grab the workpiece from the loading mechanism 201. Since the loading robotic arm 203 and the unloading robotic arm 206 are on the same axis, the loading robotic arm 203 precisely places the workpiece onto the positioning fixture 2052 of the clamping mechanism 205. The positioning fixtures 2052 are evenly arranged on the horizontally movable protective cover 2053. At this time, multiple positioning fixtures 2052 work together to fix the workpiece from different positions, ensuring the stability of the workpiece position in subsequent operations.

[0067] Motor 2056 drives the lead screw to rotate, which in turn moves the lead screw nut 2057. Since the lead screw nut 2057 is fixedly connected to the protective cover 2053, and guide rails 2058 on both sides of the lead screw nut 2057 guide it, the protective cover 2053 moves horizontally to the appropriate position. After the protective cover 2053 is in place, cylinder 2059, mounted above the positioning fixture 2052, is activated. The output end of cylinder 2059 drives pressure plate 2054 downwards. A limit plate 20511 is fixed to the bottom of pressure plate 2054, and the limit plate 20511 has a through hole corresponding to the welding position of the workpiece. During the downward pressing process of pressure plate 2054, limit plate 20511 gradually approaches the workpiece, ultimately further pressing the workpiece. Simultaneously, the through hole of limit plate 20511 precisely aligns with the welding position of the workpiece, providing accurate positioning for subsequent welding.

[0068] The second linear module 2042 in the welding mechanism 204 begins to operate. The first linear module 2041 is slidably mounted on the second linear module 2042. Through the movement of the second linear module 2042, the first linear module 2041 drives the welding laser head 2043 to move longitudinally. At the same time, the first linear module 2041 itself can also move laterally, thus enabling the welding laser head 2043 to achieve a combined lateral and longitudinal movement. During the movement of the welding laser head 2043, since its welding path is aligned with the through hole position of the limiting plate 20511, and the number and position of the pressure plates 2054 correspond one-to-one with the welding laser head 2043, when the pressure plates 2054 press down, the through holes of the limiting plate 20511 precisely expose the workpiece welding position below the welding laser head 2043. The laser emitted by the welding laser head 2043 precisely welds the workpiece welding position through the through holes.

[0069] After welding is completed, cylinder 2059 drives pressure plate 2054 to rise, releasing the clamping force on the workpiece. The unloading robot arm 206 moves to grab the welded workpiece and place it on the unloading mechanism 202. The unloading mechanism 202 transports the welded workpiece to the next process, completing the workflow of the precise positioning and clamping device for the welding of the middle plate and frame.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0071] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precise positioning and clamping device for welding the middle plate and middle frame, characterized in that, include: The machine body (2), the machine cover (1) set above the machine body (2), the loading mechanism (201) set on the machine body (2), the unloading robot arm (206) located on one side of the loading mechanism (201), the loading robot arm (203) located on the other side of the loading mechanism (201), the welding mechanism (204) set on the side of the unloading robot arm (206) away from the loading mechanism (201), the unloading mechanism (202) set on the side of the loading robot arm (203) away from the loading mechanism (201), and the clamping mechanism (205) located between the welding mechanism (204) and the unloading robot arm (206); The loading robotic arm (203) and the unloading robotic arm (206) are located on the same axis; The clamping mechanism (205) includes: A horizontally movable protective cover (2053) has its lower surface slidably mounted on a guide rail (2058) via a slider (20510); Multiple positioning fixtures (2052) are evenly distributed on the protective cover (2053) to fix the workpiece to be welded; The cylinder (2059) mounted on the positioning fixture (2052) has a pressure plate (2054) connected to its output end; A limiting plate (20511) is fixed to the bottom of the pressure plate (2054), and the limiting plate (20511) has a through hole corresponding to the welding position of the workpiece. The welding mechanism (204) includes a first linear module (2041) that can move laterally and a welding laser head (2043) mounted thereon, wherein the welding path of the welding laser head (2043) is aligned with the through hole position of the limiting plate (20511).

2. The precise positioning and clamping device for welding the middle plate and frame according to claim 1, characterized in that: The movement of the protective cover (2053) is driven by a motor (2056), the lead screw of which is connected to a lead screw seat (2057), the lead screw seat (2057) is fixedly connected to the protective cover (2053), and the lead screw seat (2057) is provided with guide rails (2058) on both sides to guide the movement of the protective cover (2053).

3. The precise positioning and clamping device for welding the middle plate and frame according to claim 1, characterized in that: The number of positioning fixtures (2052) is four, and they are evenly distributed along the surface of the protective cover (2053).

4. The precise positioning and clamping device for welding the middle plate and frame according to claim 1, characterized in that: The welding mechanism (204) further includes a second linear module (2042), on which the first linear module (2041) is slidably mounted, enabling the welding laser head (2043) to achieve a composite movement of the transverse and longitudinal directions.

5. The precise positioning and clamping device for welding the middle plate and frame according to claim 1, characterized in that: The protective cover (2053) is provided with baffles (2051) at both ends, and is sealed to the baffles (2051) by a dust cover (2055).

6. The precise positioning and clamping device for welding the middle plate and frame according to claim 1, characterized in that: The number and position of the pressure plates (2054) correspond one-to-one with the welding laser head (2043), and when the pressure plates (2054) are pressed down, the through holes of their limiting plates (20511) allow the welding position of the workpiece to be precisely exposed below the welding laser head (2043).

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