Tensioning mechanism of fine metal mask plate welding equipment

Abstract

The tensioning mechanism of the fine metal mask plate welding equipment comprises a linear motor, a lifting assembly is connected to the linear motor in a sliding mode through a bottom guide rail, a translation assembly is connected to the lifting assembly, a top plate is fixed to the translation assembly, and the top plate is fixed to the bottom guide rail. A plurality of ball screw assemblies distributed in parallel are fixed to the top plate, sliding plates are connected to the ball screw assemblies, the sliding plates are perpendicular to the ball screw assemblies, clamping jaw moving assemblies and clamping jaw assemblies are connected to the sliding plates, and the clamping jaw moving assemblies and the clamping jaw assemblies are connected together. Through the synergistic effect of the ball screw assembly and the multiple clamping jaw moving assemblies, screen frames of different width specifications can be automatically adapted, meanwhile, the clamping pressure is adjusted according to the material and weight of the screen frames, manual adjustment is not needed, the remodeling time is greatly shortened, the small-batch and multi-variety production requirements are met, and the production efficiency is improved. The technical defects that a traditional mechanism is poor in compatibility and tedious in remodeling are overcome.

Description

Technical Field

[0001] This invention relates to the field of screen printing plate-making equipment technology, specifically to a tensioning mechanism for a precision metal mask welding device. Background Technology

[0002] A screen stretching machine (also known as a screen tensioning machine) is a core component of screen printing plate making. Its core function is to evenly stretch the screen onto the frame with a preset tension, forming a printing plate carrier that meets the printing accuracy requirements. The transmission, positioning, and tensioning mechanisms are key components in the screen stretching machine that connect the entire process of feeding, stretching, and unloading. Their performance directly determines the degree of automation, positioning accuracy, and production efficiency of the screen stretching machine.

[0003] The existing screen printing frame transmission and positioning mechanism of the screen printing machine has the following technical defects: First, insufficient positioning accuracy. Traditional transmission mechanisms mostly use screw transmission or single gear transmission, relying on the precision of the thread to control displacement, which is prone to loosening and wear, resulting in a screen frame positioning deviation of more than 0.1mm, which cannot meet the requirements of high-precision screen printing and thus affects the registration accuracy of subsequent printed patterns. Second, poor compatibility. Existing mechanisms are difficult to adapt to screen frames of different sizes and weights. When changing screen frame specifications, manual adjustment of the clamping structure is required, which is cumbersome and time-consuming, and cannot meet the needs of flexible production of small batches and multiple varieties. Third, insufficient transmission stability. The transmission support point of the traditional mechanism is mostly located in the middle of the lever arm, and it is difficult to guarantee the parallelism of translation. During high-tension screen printing, screen frame displacement is prone to occur, resulting in uneven screen tension and even damage to the screen fabric. Fourth, low degree of automation. Some transmission mechanisms require manual assistance to complete the loading and unloading of screen frames, which not only increases the labor intensity of operators but also poses safety hazards and restricts the improvement of production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a tensioning mechanism for a precision metal mask welding equipment. The coordinated action of the ball screw assembly and multiple gripper moving assemblies can automatically adapt to mesh frames of different widths and adjust the clamping pressure according to the mesh frame material and weight. No manual adjustment is required, which greatly shortens the changeover time and adapts to the production needs of small batches and multiple varieties. It solves the technical defects of poor compatibility and cumbersome changeover of traditional mechanisms.

[0005] This invention provides the following technical solution: a tensioning mechanism for a precision metal mask welding equipment, comprising a linear motor, a lifting assembly slidably connected to the linear motor via a bottom guide rail, a translation assembly connected to the lifting assembly, a top plate fixed to the translation assembly, and multiple sets of parallel ball screw assemblies fixed to the top plate. Each ball screw assembly is connected to a sliding plate, which is perpendicular to the ball screw assembly. A gripper moving assembly and a gripper assembly are connected to the sliding plate, and the gripper moving assembly and the gripper assembly are connected together. Multiple sets of gripper moving assemblies are parallel to each other, and multiple sets of gripper assemblies are also parallel to each other. Each ball screw assembly includes a ball screw and a nut seat, with multiple nut seats staggered. A single nut seat adjusts the position of the corresponding sliding plate. The gripper moving assembly controls the movement of the gripper assembly.

[0006] To avoid interference between adjacent ball screw assemblies, the adjacent ball screw assemblies are staggered and their heads and tails are reversed.

[0007] To clamp the wire mesh downwards, the gripper assembly includes a gripper motor, a gripper screw, a gripper nut, and a fixed base. A gripper slider is connected to the end of the gripper nut, and a gripper pressure rod is fixed to the side of the gripper slider. The fixed base is fixed to the base plate of the gripper assembly, and a clamping block is slidably connected inside the fixed base. An inclined block is formed at the end of the clamping block, and the gripper pressure rod moves to press against the inclined block, causing the clamping block to move downwards and clamp the wire mesh. A clamping lip is connected to the lower end of the clamping block.

[0008] To reset the clamping block, an elastic element is installed at the lower end of the clamping block, and the elastic element is in a compressed state when the clamping block is clamped.

[0009] To guide the up-and-down movement of the clamping block, a guide post is connected to the lower end of the clamping block, and a guide hole is provided on the bottom plate of the gripper assembly, into which the guide post is inserted.

[0010] To adjust the position of the gripper assembly, the gripper moving assembly includes a moving motor, a moving lead screw, and a moving nut. A moving block is fixed to the end of the moving nut, a push rod is connected to the end of the moving block, and a sensor is connected to the end of the push rod.

[0011] For clamping and guiding the mesh, a telescopic assembly is also fixed to the side of the top plate. The telescopic assembly includes a connecting plate connected to the side of the top plate, a guide screw connected to the side of the connecting plate, a guide nut threaded onto the guide screw, a plug-in block fixed to the guide nut, a guide plate connected to the plug-in block, and a guide slide rail and a guide slider installed between the guide plate and the connecting plate.

[0012] To enable the central slider to move in the X and Y directions, a translation component is connected to the lower end of the top plate. The translation component includes a central slider, a transverse slider connected to the upper surface of the central slider, a transverse slide rail slidably connected to the upper end of the transverse slider, and the transverse slide rail is connected to the top plate. A longitudinal slider is connected to the lower surface of the central slider, a longitudinal slide rail slidably connected to the lower end of the longitudinal slider, and the longitudinal slide rail is fixed to the upper surface of the lifting component.

[0013] In order to adjust the position of the central slider, the gripper assembly is finely adjusted in the X and Y directions. The side of the central slider is provided with a threaded hole, and a translation screw is connected to the threaded hole. The translation screw is driven by a translation motor.

[0014] To adjust the height of the top plate, a lifting assembly is connected to the lower end of the translation assembly. The lifting assembly includes a lifting base plate, on which a lifting motor is fixed. The output end of the lifting motor is connected to a lifting screw. A translation block is threaded onto the lifting screw, and a lifting block is connected to the translation block. The upper end of the translation block and the lower end of the lifting block are both inclined surfaces. A side guide rail and a side slider are connected between the side of the lifting block and the inner wall of the lifting assembly.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The X-axis position is adjusted by the linear motor and ball screw assembly, the Y-axis position of the gripper assembly is adjusted by the gripper moving assembly, and the Z-axis position of the gripper assembly is adjusted by the lifting assembly to achieve precise positioning of the mesh frame; (2) Adjusting the height of the wire mesh and further adjusting the gap between the wire mesh and the frame ensures that the gap meets the welding requirements and improves the welding quality; (3) The ball screw assembly and multiple gripper moving assemblies work together to automatically adapt to different width specifications of the mesh frame. At the same time, the clamping pressure is adjusted according to the material and weight of the mesh frame. No manual adjustment is required, which greatly shortens the changeover time and adapts to the production needs of small batches and multiple varieties. It solves the technical defects of poor compatibility and complicated changeover of traditional mechanisms. (4) The downward pressure of the gripper assembly is also controlled by the rotation of the screw, which has high pressure accuracy and can ensure the tightness and stability of the mesh clamping, thus ensuring the smoothness of the welding process. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall perspective view of the tensioning mechanism of the present invention; Figure 2 This is a front view of the tensioning mechanism of the present invention; Figure 3 This is an exploded view of the telescopic component of the present invention; Figure 4 This is a perspective view of the multiple gripper assemblies of the present invention. Figure 5 This is a perspective view of the single-set gripper moving assembly and the gripper assembly of the present invention; Figure 6 This is a front view of the gripper assembly of the present invention; Figure 7 This is a front view of the internal structure of the gripper assembly of the present invention; Figure 8 This is a perspective view of the internal structure of the gripper assembly of the present invention; Figure 9 This is a cross-sectional view of the lifting assembly and translation assembly of the present invention; Figure 10 This is a front view of the lifting component and the translation component of the present invention; Figure 11 This is a perspective view of the translation component of the present invention; In the diagram: 1. Linear motor; 11. Bottom guide rail; 2. Lifting assembly; 21. Lifting base plate; 22. Lifting motor; 23. Lifting screw; 24. Translation block; 25. Lifting block; 26. Side guide rail; 27. Side slider; 3. Translation assembly; 31. Top plate; 32. Horizontal slide rail; 33. Horizontal slider; 34. Center slider; 35. Longitudinal slide rail; 36. Longitudinal slider; 37. Translation motor; 38. Translation screw; 4. Telescopic assembly; 41. Connecting plate; 42. Guide plate; 421. Connecting hole; 43. Guide screw; 44. Guide nut; 45. Insertion block; 46. Guide slide rail; 47. Guide screw; 5. Slider; 6. Ball screw assembly; 7. Motor; 8. Bearing housing; 9. Ball screw; 10. Nut seat; 11. Gripper moving assembly; 12. Moving motor; 13. Moving screw; 14. Moving nut; 15. Moving block; 16. Sensor; 17. Sliding plate; 18. Guide rail; 19. Guide block; 20. Gripper assembly; 10. Gripper motor; 11. Gripper screw; 12. Gripper nut; 13. Gripper slider; 14. Gripper pressure rod; 25. Gripper block; 36. Gripper lip; 47. First slider; 58. Second slider; 59. Fixed seat; 10. Top plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1 to 4 This invention provides a technical solution: a tensioning mechanism for a precision metal mask welding device, comprising a linear motor 1, a lifting assembly 2 slidably connected to the linear motor 1 via a bottom guide rail 11, the position of the lifting assembly 2 on the bottom guide rail 11 being adjusted by the linear motor 1, the lifting assembly 2 being used to adjust the height of the tensioning mechanism, thereby adjusting the height of the mesh, reducing the gap between the mesh and the frame, and improving welding quality. A translation assembly 3 is connected to the lifting assembly 2, the translation assembly 3 being used to adjust the position of the mesh, aligning the mesh with the frame, and a top plate 8 fixed to the translation assembly 3, on which multiple sets of parallel-distributed ball wires are fixed. Both the ball screw assembly 5 and the lever assembly 5 are connected to sliding plates 66, which are perpendicular to the ball screw assembly 5. Gripper moving components 6 and gripper assemblies 7 are connected to the sliding plates 66. Adjusting the position of the sliding plates 66 on the ball screw assembly 5 further adjusts the positions of the gripper moving components 6 and 7. The gripper moving components 6 and 7 are connected together, with multiple sets of gripper moving components 6 and 7 arranged parallel to each other. A single ball screw assembly 5 adjusts the position of a single sliding plate 66, thus adjusting the spacing between the gripper assemblies 7, thereby uniformly clamping meshes of different specifications and ensuring... For stable clamping of the mesh, the ball screw assembly 5 includes a ball screw 53 and nut seats 54. Multiple nut seats 54 are staggered, and each nut seat 54 adjusts the position of the corresponding sliding plate 66. The gripper moving assembly 6 controls the movement of the gripper assembly 7. In summary, when using this tensioning mechanism, the position of the lifting assembly 2 is first adjusted by moving the linear motor 1, then the height of the translation assembly 3 is adjusted by the lifting assembly 2, so that the gripper assembly 7 moves to the corresponding height of the mesh. Finally, the distance between the sliding plates 66 is adjusted by the ball screw assembly 5, so that the gripper assembly 7 is evenly distributed on the side of the mesh. The extension and retraction position of the gripper assembly 7 is adjusted by component 6 to clamp the mesh. The X-axis position is adjusted by the linear motor 1 and the ball screw assembly 5, the Y-axis position of the gripper assembly 7 is adjusted by the gripper moving assembly 6, and the Z-axis position of the gripper assembly 7 is adjusted by the lifting assembly 2, so as to achieve precise positioning of the mesh frame. The coordinated action of the ball screw assembly 5 and multiple gripper moving assemblies 6 can automatically adapt to mesh frames of different widths and adjust the clamping pressure according to the material and weight of the mesh frame. No manual adjustment is required, which greatly shortens the changeover time and adapts to the production needs of small batches and multiple varieties. It solves the technical defects of poor compatibility and cumbersome changeover of traditional mechanisms.

[0019] like Figure 1 and 4As shown, adjacent ball screw assemblies 5 are staggered and their heads and tails are set opposite to each other. By using ball screw assemblies 5 with their heads and tails set opposite to each other, adjacent sliding plates 66 can be adjusted individually. At the same time, ball screw assemblies 5 with their heads and tails set are less likely to interfere with each other. The staggered arrangement of the heads and tails improves the space utilization rate.

[0020] like Figures 6 to 8 As shown, the gripper assembly 7 includes a gripper motor 71, a gripper screw 72, a gripper nut 73, and a fixing seat 79. The gripper motor 71 controls the rotation of the gripper screw 72, which in turn drives the gripper nut 73 to move. A gripper slider 74 is bolted to the end of the gripper nut 73. The gripper slider 74 is connected to the base plate of the gripper assembly 7 via a slide rail. A gripper pressure rod 75 is fixed to the side of the gripper slider 74. The fixing seat 79 is fixed to the base plate of the gripper assembly 7 and is located on the side of the gripper slider 74. A clamping block 76 is slidably connected inside the fixed base 79. A first slider 77 is fixed on the side of the clamping block 76, and a second slider 78 is fixed on the side of the fixed base 79. The first slider 77 and the second slider 78 are slidably connected, so that the clamping block 76 and the fixed base 79 slide relative to each other. An inclined block is formed on the outer end of the clamping block 76. The jaw pressure rod 75 moves and presses on the inclined block, so that the clamping block 76 moves downward to clamp the wire mesh. A clamping lip 763 is connected to the lower end of the clamping block 76. When the clamping block 76 is pressed down, the clamping lip 763 is pressed on the wire mesh, so as to accurately clamp the wire mesh.

[0021] An elastic element 762 is installed at the lower end of the clamping block 76. The elastic element 762 is in a compressed state when the clamping block 76 is clamped. The elastic force is generated by the compression of the elastic element 762. When the clamping block 76 is not compressed by the clamping claw pressure rod 75, the elastic force will push the clamping block 76 upward to reset, which is convenient for preparing for the next clamping of the mesh.

[0022] like Figure 7 As shown, the lower end of the clamping block 76 is connected to a guide post 761. A guide hole is provided on the bottom plate of the gripper assembly 7. The guide post 761 is inserted into the guide hole. Through the guidance of the guide post 761, the clamping block 76 can only move vertically up and down.

[0023] like Figure 5 As shown, the gripper moving assembly 6 includes a moving motor 61, a moving screw 62, and a moving nut 63. The output end of the moving motor 61 is connected to the moving screw 62, and the moving nut 63 is threaded onto the moving screw 62. A moving block 64 is fixed to the end of the moving nut 63. The rotation of the moving screw 62 drives the moving block 64 to move. A push rod is connected to the end of the moving block 64, and a sensor 65 is connected to the end of the push rod. The sensor 65 is used to detect the tension on the mesh to ensure that the mesh is in a taut state. The push rod is used to apply a pushing force to the gripper assembly 7 to control the position of the gripper assembly 7. The lower end of the gripper assembly 7 is connected to a guide rail 67 and a guide block 68 to make the movement of the gripper assembly 7 smoother.

[0024] like Figure 3 As shown, a telescopic assembly 4 is also fixed to the side of the top plate 8. The telescopic assembly 4 includes a connecting plate 41 connected to the side of the top plate 8. A bearing seat is fixed to the side of the connecting plate 41. A guide screw 43 is rotatably connected to the bearing seat. A guide nut 44 is threaded onto the guide screw 43. The rotation of the guide screw 43 drives the guide nut 44 to move. A plug-in block 45 is bolted onto the guide nut 44. A guide plate 42 is connected to the plug-in block 45. A connecting hole 421 is opened on the guide plate 42. The plug-in block 45 is inserted into the connecting hole 421. The movement of the plug-in block 45 drives the guide plate 42 to move, which clamps and guides the mesh. A guide slide rail 46 and a guide slider 47 are installed between the guide plate 42 and the connecting plate 41 to make the movement of the guide plate 42 smoother.

[0025] like Figure 11 As shown, a translation component 3 is connected to the lower end of the top plate 8. The translation component 3 includes a central slider 34, a transverse slider 33 connected to the upper surface of the central slider 34, a transverse slide rail 32 slidably connected to the upper end of the transverse slider 33, and an upper plate 31 bolted to the transverse slide rail 32. The upper plate 31 is fixed to the lower end of the top plate 8. A longitudinal slider 36 is connected to the lower surface of the central slider 34, and a longitudinal slide rail 35 slidably connected to the lower end of the longitudinal slider 36. The longitudinal slide rail 35 is fixed to the upper surface of the lifting component 2. Through the transverse slider 33 and the transverse slide rail 32, the central slider 34 can move laterally. Through the longitudinal slider 36 and the longitudinal slide rail 35, the central slider 34 can slide longitudinally. This further facilitates the lateral and longitudinal adjustment of the central slider 34, controls the movement of the top plate 8, and adjusts the position of the gripper component 7, making it convenient for precise clamping of the mesh.

[0026] like Figure 10 As shown, the side of the central slider 34 is provided with a threaded hole, and a translation screw 38 is threadedly connected in the threaded hole. The translation screw 38 is driven by a translation motor 37. By driving the translation screw 38 to rotate through multiple sets of vertically distributed translation motors 37, the central slider 34 with the same orientation moves laterally or longitudinally, thereby causing the top plate 8 to move laterally or longitudinally as a whole.

[0027] like Figure 9 and 10As shown, the lower end of the translation component 3 is connected to the lifting component 2. The lifting component 2 includes a lifting base plate 21, on which a lifting motor 22 is fixed. The output end of the lifting motor 22 is connected to a lifting screw 23. A translation block 24 is threaded onto the lifting screw 23. A lifting block 25 is connected to the translation block 24. The upper end of the translation block 24 and the lower end of the lifting block 25 are both inclined surfaces. There is a guide rail between the translation block 24 and the bottom surface, and there is also a guide rail between the translation block 24 and the lifting block 25. A side guide rail 26 and a side slider 27 are connected between the side of the lifting block 25 and the inner wall of the lifting component 2. The side guide rail 26 and the side slider 27 guide the lifting block 25 so that the lifting block 25 can only move up and down in the vertical direction. Thus, the forward and backward movement of the translation block 24 drives the lifting block 25 to move up and down. Adjusting the height of the gripper component 7 makes the gap between the clamped mesh and the frame smaller, thus improving the welding quality.

[0028] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tensioning mechanism for a precision metal mask welding device, comprising a linear motor, characterized in that: A lifting assembly is slidably connected to the linear motor via a bottom guide rail. A translation assembly is connected to the lifting assembly. A top plate is fixed to the translation assembly. Multiple sets of parallel ball screw assemblies are fixed to the top plate. Each ball screw assembly is connected to a sliding plate, which is perpendicular to the ball screw assembly. A gripper moving assembly and a gripper assembly are connected to the sliding plate. The gripper moving assembly and the gripper assembly are connected together. Multiple sets of gripper moving assemblies are parallel to each other, and multiple sets of gripper assemblies are also parallel to each other. Each ball screw assembly includes a ball screw and a nut seat. Multiple nut seats are staggered. A single nut seat adjusts the position of the corresponding sliding plate. The gripper moving assembly controls the movement of the gripper assembly.

2. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The adjacent ball screw assemblies are staggered and their heads and tails are opposite.

3. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The gripper assembly includes a gripper motor, a gripper screw, a gripper nut, and a fixed base. A gripper slider is connected to the end of the gripper nut, and a gripper pressure rod is fixed to the side of the gripper slider. The fixed base is fixed to the base plate of the gripper assembly. A clamping block is slidably connected inside the fixed base. An inclined block is formed at the end of the clamping block. The gripper pressure rod moves and presses against the inclined block, causing the clamping block to move downward and clamp the wire mesh. A clamping lip is connected to the lower end of the clamping block.

4. The tensioning mechanism of a precision metal mask welding equipment according to claim 3, characterized in that: An elastic element is installed at the lower end of the clamping block, and the elastic element is in a compressed state when the clamping block is clamped.

5. The tensioning mechanism of a precision metal mask welding equipment according to claim 3, characterized in that: The lower end of the clamping block is connected to a guide post, and a guide hole is provided on the bottom plate of the gripper assembly, into which the guide post is inserted.

6. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The gripper moving assembly includes a moving motor, a moving lead screw, and a moving nut. A moving block is fixed to the end of the moving nut, a push rod is connected to the end of the moving block, and a sensor is connected to the end of the push rod.

7. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The top plate is also fixed with a telescopic assembly. The telescopic assembly includes a connecting plate connected to the side of the top plate. A guide screw is connected to the side of the connecting plate. A guide nut is threaded onto the guide screw. A plug block is fixed to the guide nut. A guide plate is connected to the plug block. A guide rail and a guide slider are installed between the guide plate and the connecting plate.

8. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The lower end of the top plate is connected to a translation component, which includes a central slider. A horizontal slider is connected to the upper surface of the central slider. A horizontal slide rail is slidably connected to the upper end of the horizontal slider. The horizontal slide rail is connected to the top plate. A vertical slider is connected to the lower surface of the central slider. A vertical slide rail is slidably connected to the lower end of the vertical slider. The vertical slide rail is fixed to the upper surface of the lifting component.

9. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The central slider has a threaded hole on its side, and a translation screw is threaded into the threaded hole. The translation screw is driven by a translation motor.

10. The tensioning mechanism of a precision metal mask welding equipment according to claim 1, characterized in that: The lower end of the translation component is connected to a lifting component. The lifting component includes a lifting base plate, on which a lifting motor is fixed. The output end of the lifting motor is connected to a lifting screw. A translation block is threaded onto the lifting screw. A lifting block is connected to the translation block. The upper end of the translation block and the lower end of the lifting block are both inclined surfaces. A side guide rail and a side slider are connected between the side of the lifting block and the inner wall of the lifting component.

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