Novel positioning tool for banana sieve processing

Abstract

The utility model relates to the technical field of mining machinery processing equipment, in particular to a novel banana screen processing positioning tool which comprises a frame body. A plurality of groups of supporting and positioning assemblies are arranged at the upper end of the frame main body; the supporting and positioning assembly comprises a lower reference pipe and a side reference pipe which are welded to the frame body, and base plates welded to the upper end face of the lower reference pipe and the side face of the side reference pipe respectively, and the end faces of the base plates are flat faces and are formed by grinding the surfaces after welding. A positioning step used for supporting and positioning a banana screen body is formed between the base plate on the side reference pipe and the base plate on the lower reference pipe. The scheme has the advantages of improving the processing and positioning precision of the banana screen, enhancing the structural rigidity and adapting to the positioning requirements of screen bodies with different radians.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery processing equipment technology, and in particular to a new type of positioning tooling for banana screen processing. Background Technology

[0002] The banana screen, a large vibrating screening device, gets its name from its banana-shaped curved screen surface and is widely used in material grading operations in industries such as mining and metallurgy. Its screen body is typically assembled from multiple welded arc-shaped screen plates, characterized by its large size, heavy weight, and complex structure. During the hole-making, welding, and assembly processes of the screen body, it is crucial to ensure that the positional accuracy and geometric dimensions (such as flatness, perpendicularity, and curvature consistency) of each component meet design requirements; otherwise, the vibration performance, service life, and screening efficiency of the screen body will be directly affected.

[0003] Traditional banana sieve processing often suffers from insufficient positioning accuracy. Traditional tooling, often employing fixed support blocks or simple frame structures, struggles to adapt to the complex curved surfaces of the banana sieve body. This leads to three-dimensional spatial misalignment of components during welding or assembly, resulting in a significant increase in cumulative errors. Specifically, fixed support blocks cannot accommodate the positioning requirements of sieve bodies with varying curvatures, and simple frame structures lack adjustability, making them prone to positioning datum failure under welding heat deformation. These problems result in quality defects in the processed sieve body, such as curvature deviations and joint misalignments, severely impacting the sieve's dynamic balance and service life.

[0004] Furthermore, existing tooling suffers from significant deficiencies in structural rigidity. Traditional positioning devices often employ single-point support, which is prone to elastic deformation when bearing heavy screen bodies, leading to a shift in the positioning reference plane. The lack of effective multi-point positioning constraints during welding makes it difficult to control the amount of welding deformation in large components, ultimately affecting the overall dimensional accuracy and operational stability of the screen body.

[0005] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a novel positioning fixture for banana sieve processing, which has the advantages of improving the positioning accuracy of banana sieve processing, enhancing structural rigidity, and adapting to the positioning requirements of sieve bodies with different curvatures.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides a novel positioning fixture for banana sieve processing, the technical solution of which is as follows: it includes a frame body; the upper end of the frame body is provided with multiple sets of support and positioning components; the support and positioning components include a lower reference tube and a side reference tube welded to the frame body, and pads welded to the upper end face of the lower reference tube and the side face of the side reference tube respectively, the end face of the pad is a flat surface, formed by grinding the surface after welding; a positioning step for supporting and positioning the banana sieve body is formed between the pad on the side reference tube and the pad on the lower reference tube.

[0009] Furthermore, this application also proposes that the multiple positioning steps formed by the multiple sets of support positioning components on the upper surface of the frame body are arranged in an inclined or arc-shaped manner to adapt to the curvature of the banana sieve body.

[0010] Furthermore, this application also proposes that the thickness of the pad can be adjusted by adding or removing shims or replacing pads of different specifications.

[0011] Furthermore, this application also proposes that the lower reference tube and its pad, as well as the pad on the side reference tube, are all provided with corresponding through holes for passing through positioning pins or connecting parts.

[0012] Furthermore, this application also proposes that the main frame includes a base plate, side plates welded to both sides of the base plate, and a connecting skeleton; the two ends of the connecting skeleton are respectively welded to the two side plates, and the lower end is welded to the base plate.

[0013] Furthermore, this application also proposes that the connecting frame includes multiple crossbeams, longitudinal beams, and connecting beams; the two ends of the crossbeams are respectively connected to the two side plates; the lower end of the longitudinal beam is connected to the bottom plate, and the upper end is welded to the crossbeam or connecting beam; the connecting beam is used to connect the longitudinal beam and the crossbeam, or two longitudinal beams or two crossbeams.

[0014] Furthermore, this application also proposes that the connecting frame further includes a base plate frame rod that is fitted and welded to the upper surface of the base plate, and a side plate frame rod that is fitted and welded to the inner end surface of the side plate; the lower end of the longitudinal beam is welded to the base plate frame rod, and the end of the transverse beam is welded to the side plate frame rod.

[0015] Furthermore, this application also proposes that the flat surfaces of the pads on the side reference tube and the pads on the lower reference tube extend beyond the edges of the side plates.

[0016] As can be seen from the above, the novel positioning fixture for banana sieve processing and its frame structure and supporting positioning components provided in this application form a positioning step by setting multiple sets of supporting positioning components. By adopting an adjustable pad and a reinforced frame structure design, it effectively solves the problems of insufficient positioning accuracy and poor structural rigidity of traditional fixtures. It has the advantages of improving the positioning accuracy of banana sieve processing, enhancing structural rigidity, and adapting to the positioning needs of sieve bodies with different curvatures. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a novel positioning fixture for banana sieve processing provided in this application.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of part A.

[0019] Figure 3 This is a three-dimensional schematic diagram of the banana sieve body installed on a positioning fixture.

[0020] Figure 4 This is a cross-sectional view of the banana sieve body installed on the positioning fixture.

[0021] Figure 5 for Figure 4 Enlarged view of part B. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] like Figure 1-5 As shown in the figure, this embodiment proposes a novel positioning fixture for banana sieve processing, including a frame body 100; the upper end of the frame body 100 is provided with multiple sets of support and positioning components 200; the support and positioning components 200 include a lower reference tube 210 and a side reference tube 220 welded to the frame body 100, and pads 230 welded to the upper end face of the lower reference tube 210 and the side face of the side reference tube 220 respectively. The end face of the pad 230 is a flat surface, formed by grinding the surface after welding; a positioning step 250 for supporting and positioning the banana sieve body 300 is formed between the pad 230 on the side reference tube 220 and the pad 230 on the lower reference tube 210. The lower reference tube 210 and the side reference tube 220 can be made of square or round steel pipes, and their cross-sectional dimensions are selected according to the wall thickness specifications based on the load-bearing requirements. The pad 230 is preferably made of Q235 steel plate, and after welding, it is precision machined by a surface grinder to eliminate welding deformation errors.

[0028] This technical solution constructs a stable three-dimensional positioning reference system through a combination of a rigid welded frame and a precision-ground pad 230. The frame body 100 provides overall support rigidity, while multiple sets of support and positioning components 200 form distributed constraints, effectively suppressing elastic deformation during the screen body processing. The flat surface of the ground pad 230 ensures that the flatness error of the contact surface is less than 0.05mm, eliminating the reference surface distortion problem caused by welding deformation in traditional tooling. The pad 230 on the lower reference tube 210 and the side reference tube 220 together form a positioning step 250, providing accurate transverse and longitudinal positioning references for the banana screen body 300, ensuring the accuracy of flatness and perpendicularity. Compared with traditional tooling using simple support blocks, this structure transmits positioning force through rigid reference tubes (lower reference tube 210, side reference tube 220), avoiding local crushing deformation. At the same time, the synergistic effect of multiple sets of positioning components can significantly reduce cumulative errors, improving the processing accuracy of key dimensions of the screen body.

[0029] Furthermore, this application proposes that multiple positioning steps 250 formed by multiple sets of support positioning components 200 on the upper surface of the frame body 100 are arranged at an angle or in an arc to adapt to the curvature of the banana sieve body 300. Specifically, the angled arrangement of the positioning steps 250 can be achieved by the following method: the height difference of the pads 230 between the lower reference tube 210 and the side reference tube 220 of each support positioning component 200 increases or decreases linearly, so that the whole forms a continuous inclined surface. The arc arrangement is achieved by calculating the radius of curvature of the banana sieve body 300 and arranging the center points of the end faces of the pads 230 of each support positioning component 200 on a concentric circular arc trajectory, with the height difference between adjacent positioning steps 250 varying according to the arc length formula. Thus, this technical solution solves the problem that traditional tooling cannot match the curvature of the sieve body through the principle of geometric adaptation. The positioning steps 250 arranged in an inclined or arc shape on the main frame 100 form a support surface consistent with the screen body, so that each section of the screen body can obtain three-point positioning during welding and assembly: the lower reference tube 210 and the pad 230 provide vertical support, the side reference tube 220 and the pad 230 provide horizontal limitation, and the inclined / arc arrangement eliminates the local suspension caused by the stepped support of traditional tooling.

[0030] In a further embodiment, the thickness of the pad 230 can be adjusted by adding or removing shims or by replacing the pad 230 with one of different specifications.

[0031] This solution includes an adjustable thickness structure for the pad 230, specifically achieved by adding or removing shims or replacing the pad 230 with one of different specifications. This feature directly affects the height adjustment of the positioning step 250: adding or removing shims allows for fine-tuning of the thickness based on the existing pad 230, while replacing the pad 230 allows for a larger change in thickness. These two adjustment methods complement each other, ensuring that the positioning step 250 can accurately match the curvature requirements of different specifications of banana sieve bodies 300, thus solving the adaptation limitations caused by the fixed thickness of the pad 230 in traditional tooling. Therefore, this technical solution solves the height adaptation problem of the positioning step 250 through the synergistic effect of the two adjustment methods: adding or removing shims is suitable for fine-tuning within a range of ±5mm, which is convenient and low-cost; replacing the pad 230 can handle large adjustments of more than 10mm, ensuring structural stability. Compared to the traditional fixed-thickness pad 230, this design allows the height of the positioning step 250 to precisely match the 300 arc tolerance of the banana screen body, eliminating welding deformation or assembly misalignment of the screen body caused by insufficient tooling adaptability, while reducing the cost of repeated tooling preparation.

[0032] like Figure 2 As shown, the lower reference tube 210 and its pad 230, as well as the pad 230 on the side reference tube 220, are all provided with corresponding through holes 240 for passing through positioning pins or connecting parts. In this design, the lower reference tube 210 and its pad 230, and the side reference tube 220 pad 230 are all provided with through holes 240, which are used to pass through positioning pins or connecting parts. These features work together to achieve the following: by providing corresponding through holes 240 on the pads 230 of the lower reference tube 210 and the side reference tube 220, positioning pins can be used to achieve rapid alignment between the screen body and the tooling, and the fixing can be completed by connecting parts (such as bolts), thus solving the problem of inaccurate positioning of traditional tooling. This design ensures positioning accuracy and improves assembly efficiency. The through hole 240 structure is simple, reliable, and easy to operate. When the positioning pin is inserted into the through hole 240, the relative position of the screen body and the tooling is precisely defined, and the final fixing can be completed by connecting parts. This design solves the problem of cumulative error caused by the lack of precise positioning structure in traditional tooling. Its advantages are: the 240 through hole structure is easy to process and has high repeatability and positioning accuracy. The combination of positioning pin and connecting parts ensures the operability of the assembly process and avoids displacement during the assembly of the screen body.

[0033] Specifically, the base plate 110, serving as the foundation support surface, typically uses a 10-20mm thick steel plate to ensure load-bearing capacity. Side plates 120 are vertically welded to both sides of the base plate 110, their height determined according to the installation requirements of the banana screen. The connecting frame can be made of I-beams, square tubing, or a combined welded structure, with its ends connected to the side plates 120 via fillet welds or bevel welds, and its lower end fixed to the base plate 110 via continuous welds. As a preferred embodiment, the connecting frame can be designed in a cross-grid or grid pattern to enhance overall rigidity. This technical solution achieves a closed-loop force transmission path through a box-type welded structure. The base plate 110 bears the main vertical load, the side plates 120 restrict lateral displacement, and the connecting frame connects the two side plates 120 to the base plate 110 as a whole, forming a spatial grid force-bearing system. Thus, the frame body 100 can effectively distribute the vibration load during banana screen processing, reduce welding deformation, and provide a stable installation foundation for the support and positioning components 200.

[0034] Furthermore, the connecting frame includes a technical solution comprising multiple crossbeams 131, longitudinal beams 132, and connecting beams 133. The crossbeams 131 are connected to the side plates 120 at both ends. The lower end of the longitudinal beams 132 is connected to the base plate 110, and the upper end is welded to either the crossbeams 131 or the connecting beams 133. The connecting beams 133 connect the longitudinal beams 132 to the crossbeams 131, or two longitudinal beams 132 or two crossbeams 131. Specifically, the crossbeams 131 can be made of I-beams or rectangular steel pipes, with both ends connected to the side plates 120 via fillet welds or butt welds. The longitudinal beams 132 are preferably H-beams or rectangular steel pipes, with the lower end fixed to the base plate 110 via bevel welds, and the upper end welded to the web of the crossbeams 131 using a T-joint. The connecting beams 133 can be made of channel steel or irregularly shaped connectors, and stiffening ribs are provided at the connection nodes with the longitudinal beams 132 to improve node strength. Thus, this technical solution effectively improves the overall rigidity of the tooling by constructing a spatial grid structure. In this structure, the crossbeam 131 forms a horizontal anti-torsional system, suppressing the relative displacement of the side plates 120; the longitudinal beam 132 establishes a vertical force transmission path, transferring the upper load to the bottom plate 110; and the connecting beam 133 ensures continuous force transmission and avoids stress concentration at the nodes. The key feature of this structure is that it achieves an optimal rigidity-to-weight ratio with limited material usage through the spatial synergy of the beams. This scheme constructs a three-dimensional force-bearing system through the spatial grid arrangement of the crossbeams 131 and longitudinal beams 132, combined with the node reinforcement of the connecting beam 133. The crossbeams 131 resist lateral deformation, the longitudinal beams 132 bear vertical loads, and the connecting beams 133 ensure continuous force transmission, collectively enhancing the overall rigidity of the frame. Compared to traditional single-layer frames, this three-dimensional frame structure significantly improves bending / torsional performance, ensures the dimensional stability of the tooling during banana screen processing, and solves the problem of decreased positioning accuracy caused by frame deformation.

[0035] Furthermore, the connecting frame also includes a base plate frame rod 134 welded to the upper end face of the base plate 110, and a side plate frame rod 135 welded to the inner end face of the side plate 120; the lower end of the longitudinal beam 132 is welded to the base plate frame rod 134, and the end of the transverse beam 131 is welded to the side plate frame rod 135. In this scheme, the base plate frame rod 134 is welded to the upper end face of the base plate 110, the side plate frame rod 135 is welded to the inner end face of the side plate 120, the lower end of the longitudinal beam 132 is welded to the base plate frame rod 134, and the end of the transverse beam 131 is welded to the side plate frame rod 135. The base plate frame rod 134 is used to increase the strength of the base plate 110 and improve the connection strength between the base plate 110 and the connecting frame; the side plate frame rod 135 is used to increase the strength of the side plate 120 and improve the lateral support stability; the longitudinal beam 132 and the transverse beam 131 respectively achieve force transmission path optimization through the frame rods (base plate frame rod 134 and side plate frame rod 135), so that the tooling as a whole forms a grid-like reinforced structure, effectively dispersing welding stress and improving deformation resistance. By adding the base plate frame rod 134 and the side plate frame rod 135 as intermediate transition structures, the welding contact area is increased and the force transmission path is optimized, so that when the frame body 100 bears the weight of the banana screen body 300 and the processing vibration, the stress distribution of each connection part is more uniform, thereby significantly improving the overall rigidity and stability of the tooling.

[0036] Furthermore, the flat surfaces of the pads 230 on the side reference tube 220 and the lower reference tube 210 extend beyond the edge of the side plate 120. This technical solution ensures that the supporting surface of the positioning step 250 completely covers the contact area of ​​the banana screen body 300 by extending the flat surface of the pad 230 to the outside of the side plate 120. This avoids the problems of discontinuity of the positioning step 250 or uneven distribution of supporting force caused by interference from the edge of the side plate 120. The extended structure of the pad 230 not only increases the effective contact area between the tooling and the screen body, but also facilitates the grinding process after welding to ensure the accuracy requirements of the flat surface. Compared with the prior art, this design significantly improves the forming accuracy and structural stability of the positioning step 250, enabling the screen body to obtain a uniform distribution of supporting force during welding, thereby effectively solving the problem of incomplete positioning surface caused by the edge restriction of the side plate 120 in traditional tooling.

[0037] In summary, this tooling is mainly used for positioning and support during the welding or assembly of the banana screen body 300, ensuring the dimensional accuracy of the screen body structure and reducing processing errors. It is especially suitable for efficient repetitive operations in mass production.

[0038] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A novel positioning fixture for banana sieve processing, comprising a frame body (100); characterized in that: The upper end of the frame body (100) is provided with multiple sets of support and positioning components (200); The support positioning assembly (200) includes a lower reference tube (210) and a side reference tube (220) welded to the frame body (100), and a pad (230) welded to the upper end face of the lower reference tube (210) and the side face of the side reference tube (220) respectively. The end face of the pad (230) is a flat surface, which is formed by grinding the surface after welding. A positioning step (250) for supporting and positioning the banana sieve body (300) is formed between the pad (230) on the side reference tube (220) and the pad (230) on the lower reference tube (210).

2. The positioning fixture for banana sieve processing according to claim 1, characterized in that: The multiple positioning steps (250) formed by the multiple sets of support and positioning components (200) on the upper end face of the frame body (100) are arranged in an inclined or arc-shaped manner to match the curvature of the banana sieve body (300).

3. The positioning fixture for banana sieve processing according to claim 1, characterized in that: The thickness of the pad (230) can be adjusted by adding or removing pads or by replacing pads of different specifications.

4. The positioning fixture for banana sieve processing according to claim 1, characterized in that: The lower reference tube (210), the side reference tube (220), and the pad (230) on it are all provided with corresponding through holes (240) for passing through positioning pins or connectors.

5. The positioning fixture for banana sieve processing according to claim 1, characterized in that: The main frame (100) includes a base plate (110), side plates (120) welded to both sides of the base plate (110), and a connecting skeleton; The two ends of the connecting frame are welded to the two side plates (120) respectively, and the lower end is welded to the bottom plate (110).

6. The positioning fixture for banana sieve processing according to claim 5, characterized in that: The connecting frame includes multiple crossbeams (131), longitudinal beams (132), and connecting beams (133); The two ends of the crossbeam (131) are respectively connected to the two side plates (120); The lower end of the longitudinal beam (132) is connected to the base plate (110), and the upper end is welded to the cross beam (131) or the connecting beam (133); The connecting beam (133) is used to connect the longitudinal beam (132) and the transverse beam (131), or two longitudinal beams (132) or two transverse beams (131).

7. A novel positioning fixture for banana sieve processing according to claim 6, characterized in that: The connecting frame also includes a base plate frame rod (134) that is welded to the upper end face of the base plate (110), and a side plate frame rod (135) that is welded to the inner end face of the side plate (120). The lower end of the longitudinal beam (132) is welded to the bottom plate frame rod (134), and the end of the transverse beam (131) is welded to the side plate frame rod (135).

8. A novel positioning fixture for banana sieve processing according to claim 5, characterized in that: The flat surfaces of the pad (230) on the side reference tube (220) and the pad (230) on the lower reference tube (210) extend beyond the edge of the side plate (120).

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