Split type rack of high-precision thin plate special-shaped coiling machine

Abstract

This utility model relates to the field of metal processing equipment technology, specifically a split-type frame for a high-precision thin plate profile rolling machine, including a left column, a right column, and a middle crossbeam. Unlike existing technologies, the left column has identical cross-shaped keyways on its right side, the right column on its left side, and both ends of the middle crossbeam. Each cross-shaped keyway has four support arms distributed at 90-degree angles. A flat key is embedded inside the four support arms of the cross-shaped keyways on both the left and right columns. Screw holes are formed between adjacent support arms of each cross-shaped keyway on both the left and right columns. Through holes are formed at both ends of the middle crossbeam, corresponding to the screw holes. Fastening screws pass through the through holes and are screwed into the screw holes, thereby fixing the left column, right column, and middle crossbeam into a single unit. Compared with existing technologies, this utility model improves connection accuracy, enhances structural rigidity, and facilitates disassembly and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of metal processing equipment technology, specifically to a split frame structure for a high-precision thin plate profile rolling machine, which is suitable for thin plate profile rolling equipment with high requirements for frame precision, standardized production and convenient maintenance. Background Technology

[0002] like Figure 1 The high-precision thin plate profile rolling machine shown is the core equipment for producing irregularly shaped thin plates, such as arc-shaped and annular thin plates. Its frame, as the load-bearing foundation of the equipment, directly affects the precision and stability during the rolling process. Traditional high-precision thin plate profile rolling machines generally adopt an integrated welded structure for their frames, where the left column 100, right column 200, and middle crossbeam 300 are fixed together as a single unit through welding. However, this integrated welded structure has the following technical defects: Precision is difficult to control: thermal deformation during welding can cause deviations in the overall dimensions of the frame, and correction after thermal deformation is difficult, making it impossible to meet the micron-level precision requirements of high-precision rolling for the frame; Unstandardized: The left and right columns and the middle crossbeam are designed as a single unit. Rolling machines of different widths need to be welded and processed separately, which makes it impossible to achieve mass standardized production, resulting in low production efficiency and high processing costs. High maintenance costs: If any part of the frame is damaged, the entire frame needs to be cut and re-welded for replacement. The maintenance cycle is long, and it is difficult to restore the original accuracy after replacement. It may even lead to the scrapping of the entire frame.

[0003] To address the aforementioned issues, there is an urgent need for an improved rack structure that can balance accuracy, standardization, and ease of maintenance. Utility Model Content

[0004] To overcome any technical defects or shortcomings in existing technologies, this utility model provides a split-type frame for a high-precision thin-plate irregular-shaped rolling machine. This enables standardized production of the two side columns, reducing processing costs and improving production efficiency; it avoids welding heat deformation, ensuring frame assembly accuracy and meeting the high-precision requirements of the rolling machine; and it simplifies the maintenance process, reducing replacement costs and timelines after column damage. The adopted technical solution is as follows: A high-precision thin plate profile rolling machine with a split frame includes a left column, a right column, and a middle crossbeam. Unlike existing technologies, the left column has identical cross-shaped keyways on its right side, the right column on its left side, and both ends of the middle crossbeam. Each cross-shaped keyway has four support arms distributed at 90 degrees. A flat key is embedded inside each of the four support arms of the cross-shaped keyways on the left and right columns. Screw holes are formed on the left and right columns between adjacent support arms of their respective cross-shaped keyways. Through holes are formed at both ends of the middle crossbeam, corresponding to the screw holes. Fastening screws pass through the through holes and are screwed into the screw holes, thereby fixing the left column, right column, and middle crossbeam into a single unit.

[0005] Furthermore, of the four arms of the cross keyway, two arms extend in a horizontal direction, and the other two arms extend in a vertical direction. The horizontal and vertical arms intersect each other perpendicularly to form a cross structure.

[0006] Furthermore, each of the left and right columns has a pin hole in the cross keyway corresponding to the middle position of each support arm; a pin is embedded in the flat key at the position corresponding to the pin hole; the pin is inserted into the pin hole to pre-fix the flat key in the cross keyway.

[0007] Furthermore, the portion of the pin exposed on the flat key has a taper of 1-2°.

[0008] Furthermore, the thickness of the flat key is greater than the depth of the cross keyway, and less than or equal to twice the depth of the cross keyway.

[0009] Furthermore, the cross keyways and flat keys of the left and right columns, as well as the cross keyways and flat keys of the middle crossbeam, are all transition fits or interference fits, with a fit tolerance range of H7 / k6 to H7 / p6.

[0010] Furthermore, the four screw holes on the left and right columns are symmetrically distributed along the central axis of the cross keyway.

[0011] Furthermore, the fastening screw is a high-strength loosening screw with a thread specification of not less than M16.

[0012] Furthermore, the mating surfaces of the left column and the right column facing the middle crossbeam are respectively provided with annular positioning grooves; replaceable leveling pads are adapted in the annular positioning grooves. The leveling pads are made of wear-resistant alloy steel with a thickness of 0.02-0.1mm; by selecting leveling pads of different thicknesses in the annular positioning grooves of the left and right columns, the height difference between the left and right ends of the middle crossbeam can be compensated, thereby achieving the initial adjustment of the levelness of the middle crossbeam.

[0013] Furthermore, at both ends of the intermediate crossbeam, located outside the cross keyway, there are elongated adjustment holes extending horizontally. A horizontal adjustment bolt passes through the adjustment hole, with one end of the horizontal adjustment bolt screwed to the left or right column and the other end limited by a nut. When the horizontal adjustment bolt is tightened, the intermediate crossbeam can move slightly along the extension direction of the adjustment hole. With the help of a level, the horizontality of the intermediate crossbeam can be finely adjusted within a range of ±0.05mm.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are: Improved connection accuracy: By using cross keyways of the same specifications at the ends of the left and right columns and the middle crossbeam, and engaging with flat keys, precise positioning in both horizontal and vertical directions is achieved. This avoids the unidirectional positioning deviation that occurs in traditional split-structure connections, and significantly improves the docking accuracy of the various components of the frame.

[0015] Enhanced structural rigidity: The multi-directional interlocking of the cross keyway and the flat key, combined with the symmetrical locking of the fastening screws, forms a dual constraint of "positioning + fastening", which effectively disperses the load stress during the rolling process, reduces frame deformation, and improves the overall structural stability.

[0016] Easy to disassemble and maintain: It adopts a split structure and is connected by a combination of cross keyways and screws. Compared with the integral frame, it is easier to disassemble and transport. During installation, no complicated calibration tools are required to achieve quick alignment. Disassembly is convenient for later maintenance or component replacement, reducing the difficulty of operation.

[0017] Enhance versatility and standardization: The cross keyways of the left column, right column and middle crossbeam are standardized to ensure component interchangeability, facilitate mass production and standardized manufacturing, and reduce production costs and spare parts management difficulty. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a high-precision thin plate profile rolling machine.

[0019] Figure 2 This is a schematic diagram of the structure of the left column of this utility model.

[0020] Figure 3 This is a schematic diagram of the right column of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the middle crossbeam of this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the flat key of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of this utility model, which is fastened as a single unit. Detailed Implementation

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the paper. This orientation or positional relationship is only for the convenience of describing this utility model and simplifying the description, and does 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, and therefore should not be construed as a limitation of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "communication" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figure 1-6 The high-precision thin plate profile rolling machine shown has a split frame, including a left column 100, a right column 200, and a middle crossbeam 300. The right side of the left column 100, the left side of the right column 200, and both ends of the middle crossbeam 300 are provided with identical cross-shaped keyways 1. Each cross-shaped keyway 1 has four support arms distributed at 90 degrees. A flat key 2 is embedded inside each of the four support arms of the cross-shaped keyways 1 of the left column 100 and the right column 200. Screw holes 3 are respectively provided on the left column 100 and the right column 200 at positions between adjacent support arms of their respective cross-shaped keyways 1. Through holes 4 are respectively provided at both ends of the middle crossbeam 3 at positions corresponding to the screw holes 3. Fastening screws 5 pass through the through holes 4 and are screwed into the screw holes 3, thereby fixing the left column 100, the right column 200, and the middle crossbeam 300 into a single unit.

[0028] The "identical cross keyways" mentioned in this embodiment refers to the fact that the cross keyways on the right side of the left column, the left side of the right column, and both ends of the middle crossbeam are completely identical in terms of the core parameters for achieving precise docking and fit. This specifically includes three aspects: 1. Uniform dimensional parameters: The width, depth, and length of the four arms of the cross keyway are exactly the same (e.g., arm width 8mm, depth 5mm, length 15mm), ensuring that the flat key can be fitted into the keyway of both the column and the beam simultaneously, without any gaps or jamming caused by dimensional deviations. 2. Consistent shape and distribution: All four support arms are distributed at a 90-degree angle (adjacent support arms are perpendicular), and the center line of the support arm is in the same position relative to the reference axis of the column and the beam (such as the vertical axis of the column and the horizontal axis of the beam) to avoid misalignment caused by deviation in the distribution angle of the support arms; 3. Uniform machining tolerances: The dimensional tolerances (such as width tolerance H7) and geometric tolerances (such as support arm parallelism tolerance 0.02mm and perpendicularity tolerance 0.01mm) of the keyway are consistent to ensure the precision matching of the mating surfaces and provide a basis for subsequent positioning and fixing.

[0029] This embodiment achieves high-precision assembly and stable connection of the split frame through a combination structure of "cross keyway + flat key positioning + screw fastening". The principle can be divided into two parts: "precise positioning" and "reliable fixing". 1. Precise positioning principle: Multi-directional constraints eliminate docking deviations The four 90-degree distributed arms of the cross keyway, together with the embedded flat key, form a two-way positioning constraint of "horizontal + vertical": Horizontal direction: The cooperation between the two left and right support arms and the flat key restricts the lateral displacement of the middle crossbeam relative to the column, and avoids left and right offset during crossbeam assembly; Vertical direction: The cooperation between the upper and lower support arms and the flat key restricts the vertical displacement of the middle crossbeam relative to the column, and avoids misalignment during the assembly of the crossbeam; Because the cross keyways of the column and the crossbeam are of the same specification, the flat key can be tightly embedded in both keyways at the same time, forming a rigid positioning relationship of "column-flat key-crossbeam", which controls the docking deviation within a very small range (such as within ±0.03mm) and meets the requirements of the rolling machine for the frame accuracy.

[0030] 2. Reliable fixing principle: Distributed load ensures structural stability Based on precise positioning, the three components are rigidly fixed by fastening screws: The screws pass through the through holes of the middle crossbeam and are screwed into the screw holes of the column to lock the crossbeam and the column tightly together and prevent loosening after assembly. The screw holes are located between adjacent arms of the cross keyway and are distributed around the center of the keyway (later clarified as 4 symmetrically distributed holes). This allows the screw tightening force to be evenly transmitted to the periphery of the cross keyway, dispersing the load stress generated during the operation of the rolling machine (such as the torque and impact force when rolling thin plates), reducing frame deformation caused by local stress concentration, and ensuring the overall structural stability.

[0031] In summary, this embodiment, through the design logic of "positioning first, fixation follow-up", not only solves the problem of high-precision assembly of split frame, but also ensures the structural rigidity after assembly, adapting to the working requirements of high-precision thin plate irregular shape rolling machine.

[0032] In another preferred embodiment, of the four arms of the cross keyway 1, two arms extend horizontally, and the other two arms extend vertically, with the horizontal and vertical arms intersecting perpendicularly to form a cross structure. This clarifies the orthogonality of the positioning directions, further eliminating angular deviations during docking and enhancing the accuracy of both horizontal and vertical bidirectional positioning.

[0033] In another preferred embodiment, pin holes 11 are provided in the cross keyways 1 of the left column 100 and the right column 200, corresponding to the middle position of each support arm; a pin 21 is embedded in the flat key 2 at a position corresponding to the pin hole 11; the pin 21 is inserted into the pin hole 11 to pre-fix the flat key 2 in the cross keyway 1. This pre-fixation of the flat key in the cross keyway avoids displacement of the flat key during assembly, simplifies the assembly process, and improves assembly efficiency.

[0034] In another preferred embodiment, the portion of the pin 21 exposed above the flat key 2 has a taper of 1-2°. This enhances the tightness of the insertion between the pin and the pin hole, making the pre-fixation of the flat key more secure and reducing the risk of the flat key loosening after assembly.

[0035] In another preferred embodiment, the thickness of the flat key 2 is greater than the depth of the cross keyway 1, but less than or equal to twice the depth of the cross keyway 1. This ensures that the flat key can be simultaneously embedded in the cross keyways of both the column and the beam, forming continuous positioning constraints and guaranteeing the integrity and effectiveness of the positioning structure.

[0036] In another preferred embodiment, the cross keyway 1 and flat key 2 of the left column 100 and right column 200, as well as the cross keyway 1 and flat key 2 of the middle crossbeam 300, are all transition fits or interference fits, with a fit tolerance range of H7 / k6 to H7 / p6. This reduces the fit clearance, improves positioning accuracy, and enhances connection rigidity, thereby reducing structural sway during operation.

[0037] In another preferred embodiment, the four screw holes 3 on the left column 100 and the right column 200 are symmetrically distributed along the central axis of the cross keyway 1. This ensures that the tightening force of the fastening screws is evenly distributed on the mating surface, avoiding frame deformation caused by localized stress concentration and guaranteeing structural stability.

[0038] In another preferred embodiment, the fastening screw 5 is a high-strength loosening screw with a thread specification of not less than M16. This enhances the connection's resistance to loosening, prevents connection failure due to vibration during long-term operation, and extends the service life of the frame.

[0039] In another preferred embodiment, the mating surfaces of the left column 100 and the right column 200 facing the middle crossbeam 300 are respectively provided with annular positioning grooves. Replaceable leveling shims are fitted within these annular positioning grooves. The leveling shims are made of wear-resistant alloy steel with a thickness of 0.02-0.1 mm. By selecting leveling shims of different thicknesses within the annular positioning grooves of the left and right columns, the height difference between the left and right ends of the middle crossbeam 300 can be compensated, achieving initial adjustment of the horizontality of the middle crossbeam 300. Compensating for the height difference between the two ends of the crossbeam with the shim thickness lays the foundation for high-precision assembly.

[0040] In another preferred embodiment, elongated adjustment holes extending horizontally are respectively provided at both ends of the intermediate crossbeam 300, located outside the cross keyway 1. A horizontal adjustment bolt passes through each adjustment hole, with one end screwed to the left column 100 or the right column 200, and the other end limited by a nut. When the horizontal adjustment bolt is tightened, the intermediate crossbeam 300 can move slightly along the extension direction of the adjustment hole. Combined with a level gauge, this allows for fine adjustment of the horizontality of the intermediate crossbeam 300, with an adjustment range of ±0.05mm. This allows for fine-tuning of the crossbeam's horizontality, and, with the aid of testing tools, ensures the overall horizontal accuracy of the frame, meeting the high-precision operating requirements of the rolling machine.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split-type frame for a high-precision thin-plate profile rolling machine, comprising a left column (100), a right column (200), and a middle crossbeam (300), characterized in that, The left column (100) has a cross keyway (1) of the same specification on the right side, the right column (200) has a cross keyway (1) on the left side, and the middle crossbeam (300) has a cross keyway (1) with four arms distributed at 90 degrees. A flat key (2) is embedded in the inner side of the four arms of the cross keyway (1) of the left column (100) and the right column (200). On the left column (100) and the right column (200), screw holes (3) are respectively opened between two adjacent arms of the cross keyway (1). At both ends of the middle crossbeam (300), through holes (4) are respectively opened at the positions corresponding to the screw holes (3). Fastening screws (5) pass through the through holes (4) and are screwed into the screw holes (3), thereby fixing the left column (100), the right column (200) and the middle crossbeam (300) into one unit.

2. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, Of the four arms of the cross keyway (1), two arms extend in the horizontal direction, and the other two arms extend in the vertical direction. The horizontal and vertical arms intersect each other perpendicularly to form a cross structure.

3. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, In the cross keyway (1) of the left column (100) and the right column (200), a pin hole (11) is provided in the middle position of each support arm; on the flat key (2), a pin shaft (21) is embedded in the position corresponding to the pin hole (11); the pin shaft (21) is inserted into the pin hole (11) to pre-fix the flat key (2) in the cross keyway (1).

4. The split-type frame of the high-precision thin plate profile rolling machine according to claim 3, characterized in that, The portion of the pin (21) exposed on the flat key (2) has a taper of 1-2°.

5. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, The thickness of the flat key (2) is greater than the depth of the cross keyway (1) and less than or equal to twice the depth of the cross keyway (1).

6. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, The cross keyway (1) and flat key (2) of the left column (100) and right column (200), as well as the cross keyway (1) and flat key (2) of the middle crossbeam (300), are all transition fits or interference fits, with a fit tolerance range of H7 / k6~H7 / p6.

7. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, The four screw holes (3) on the left column (100) and the right column (200) are symmetrically distributed along the central axis of the cross keyway (1).

8. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, The fastening screw (5) is a high-strength loosening screw with a thread specification of not less than M16.

9. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, The left column (100) and the right column (200) are provided with annular positioning grooves on their mating surfaces facing the middle crossbeam (300). Replaceable horizontal adjustment pads are fitted inside the annular positioning grooves. The horizontal adjustment pads are made of wear-resistant alloy steel with a thickness of 0.02-0.1mm. By selecting horizontal adjustment pads of different thicknesses in the annular positioning grooves of the left and right columns, the height difference between the left and right ends of the middle crossbeam (300) can be compensated, thereby achieving the initial adjustment of the horizontality of the middle crossbeam (300).

10. The split-type frame of the high-precision thin plate profile rolling machine according to claim 1, characterized in that, At both ends of the intermediate crossbeam (300), located outside the cross keyway (1), there are elongated adjustment holes extending in the horizontal direction. A horizontal adjustment bolt is inserted into the adjustment hole. One end of the horizontal adjustment bolt is screwed to the left column (100) or the right column (200), and the other end is limited by a nut. When the horizontal adjustment bolt is screwed, the intermediate crossbeam (300) can move slightly along the extension direction of the adjustment hole. With the help of a level instrument, the level of the intermediate crossbeam (300) can be finely adjusted. The adjustment range is ±0.05mm.

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