Straightening machine rack and straightening machine thereof

Abstract

The invention relates to the technical field of metal pipe processing machinery, in particular to a steel pipe straightening machine rack and a straightening machine thereof. The machine frame comprises a machine frame body composed of an upper cross beam, stand columns and a lower cross beam. Structural optimization is mainly conducted on the lower cross beam, an independently-arranged fixing support in a traditional structure is omitted, rib plates on the two sides of the lower cross beam are designed to be of a heightened protruding structure, the protruding structure is directly welded to a mounting bottom plate of the lower cross beam, and therefore the function of an original fixing support is replaced. By heightening the rib plates, the moment of inertia of the key section of the lower cross beam is remarkably increased, so that the bending strength and the bearing capacity of the lower cross beam of the rack are greatly improved on the premise that the overall quality of the straightening machine is basically unchanged. The device is compact in structure, high in strength and suitable for various steel pipe straightening devices.

Description

Technical Field

[0001] This invention relates to the field of metal pipe processing machinery technology, specifically to a frame for a steel pipe straightening machine and the straightening machine itself. Background Technology

[0002] Steel pipe straightening machines are key pieces of equipment in the metallurgical and machining fields, used to eliminate bending deformations in steel pipes during production and processing. The machine frame, as the core load-bearing component, directly affects straightening accuracy, equipment lifespan, and processing capacity due to its strength and rigidity.

[0003] Traditional straightening machine frames typically employ a split design, consisting of the frame body (including the upper crossbeam, columns, and lower crossbeam) and independent fixed supports bolted to the lower crossbeam (e.g., Figure 3 (As shown). Furthermore, in traditional designs, because the liftable support is equipped with a hydraulic cylinder, it needs to have a certain height in the vertical direction. Correspondingly, fixed supports are installed on both sides to maintain the same height as the hydraulic cylinder. Therefore, for the sake of simplifying machining processes (simplifying milling processes) and reducing manufacturing costs, the mounting surfaces of the fixed supports and the liftable support are usually designed to be on the same height plane. This also results in the side stiffeners of the lower crossbeam being limited to the same height as the intermediate stiffener. This design has the following inherent drawbacks: 1. Inefficient use of space: The independent fixed support occupies the valuable longitudinal space directly above the lower crossbeam, which restricts the height of the side stiffeners of the lower crossbeam and fails to fully utilize the huge contribution of the cross-sectional height to the moment of inertia.

[0004] 2. The structure is discontinuous, with the support and lower crossbeam connected by bolts, forming an interface with abrupt changes in stiffness. Under alternating loads, stress concentration and loosening of the connection are likely to occur.

[0005] 3. Low weight efficiency: To achieve the required stiffness, it is often necessary to increase the width of the lower crossbeam or the volume of the support, resulting in an unnecessary increase in weight.

[0006] This design faces contradictory constraints: the overall height of the lower crossbeam is limited by the travel of the movable crossbeam and the total height of the equipment; lightweighting is required due to the impact of heavy equipment on the foundation and energy consumption; and the equipment must withstand enormous alternating straightening forces during operation. While existing technologies teach increasing the height of stiffeners to improve beam strength, they do not address how to resolve the dual constraints of space and weight in the specific scenario of a straightening machine. There are also approaches that integrate multiple parts to reduce quantity, but these typically do not consider weight balance and are not integrated with performance enhancement systems. Therefore, an innovative design is needed to systematically address the technical challenge of significantly improving the bending strength of core load-bearing components under strict space and weight constraints. Summary of the Invention

[0007] Technical problems to be solved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a straightening machine frame with optimized structure and significantly improved strength, as well as a straightening machine thereof. Through structural innovation, this frame significantly improves the bending resistance of the lower crossbeam while maintaining the overall machine weight.

[0008] Technical solution To achieve the above objectives, the main technical solutions adopted by the present invention include: In a first aspect, the present invention provides a high-strength frame for a straightening machine, including a lower crossbeam; the lower crossbeam includes a frame, raised side stiffeners disposed on both sides of the frame, and a middle stiffener disposed in the middle of the frame; raised protrusions are provided on the raised side stiffeners on both sides, and the height of the raised side stiffeners is higher than the height of the middle stiffener.

[0009] Furthermore, the frame of the straightening machine also includes an upper crossbeam and a column; the upper and lower crossbeams are connected by the column and are arranged in parallel, one above the other.

[0010] Furthermore, the lower crossbeam also includes a mounting base plate; the mounting base plate is welded to the raised side stiffener plate to form a bearing surface for direct installation of the straightening mechanism, thereby enabling the lower crossbeam to have the dual integrated functions of a bearing base and a mounting support.

[0011] Furthermore, a lifting support mounting plate is provided above the intermediate stiffening plate.

[0012] Furthermore, the raised protrusions of the heightened side stiffeners are triangular.

[0013] Furthermore, after the side stiffeners are welded to the mounting base plate, the moment of inertia of the combined section is increased by more than 40% compared to the moment of inertia of the combined section of the traditional lower crossbeam and fixed support.

[0014] Furthermore, the difference between the increased weight from the raised portion of the side stiffener plate and the reduced weight from the removal of the fixed support is within ±10%.

[0015] Furthermore, the upper and lower crossbeams are connected by columns using prestressing.

[0016] Furthermore, the straightening machine frame is equipped with a lower movable crossbeam and an upper movable crossbeam; the lower movable crossbeam and the upper movable crossbeam are installed alternately on the column; the lower movable crossbeam and the upper movable crossbeam can move up and down reciprocally under the guidance of the column.

[0017] Secondly, the present invention provides a straightening machine comprising the high-strength frame for the straightening machine described above.

[0018] Beneficial effects This invention, through a systematic and innovative design, eliminates the fixed support required in the conventional design of traditional straightening machines, thereby freeing up longitudinal space for the heightening of the side stiffeners.

[0019] First, in this design, the side stiffeners are heightened, significantly increasing the height of the combined section formed by the stiffeners and the mounting base plate. According to the formula for the moment of inertia of a section... When the amount of material used (width b) does not change significantly, the moment of inertia of the cross section ( The bending resistance of the lower crossbeam increases proportionally to the cube of its height (h). Therefore, the bending resistance of the optimized lower crossbeam structure is fundamentally enhanced.

[0020] Secondly, the design is simplified and reliable. Integrating the function of the fixed support into the lower crossbeam body reduces the number of parts and assembly steps, thus lowering manufacturing costs. The integral welded structure avoids the loosening problems that may occur with bolted connections, improving the rigidity of the frame and the reliability of the connection.

[0021] Finally, the weight of the equipment was optimized. By eliminating the independent cast iron or steel fixed supports, the weight of these parts was reduced. At the same time, the added weight of steel from appropriately increasing the height of the stiffening plates on both sides of the lower crossbeam was roughly equivalent to the weight of the eliminated fixed supports. Therefore, the total mass of the entire straightening machine frame and even the whole machine can remain basically unchanged, or even be reduced, achieving a balance between "lightweight" and "high strength".

[0022] Experiments and mechanical analysis show that the load-bearing strength of the lower crossbeam of the straightening machine frame using the structure of this invention can be increased by more than 40% compared with the traditional structure, thereby providing greater straightening force or higher safety margin.

[0023] This invention breaks away from the traditional design paradigm that requires the separation of the "load-bearing base" and "functional support" through the design concept of "functional deconstruction and re-integration." By eliminating independent fixed supports, valuable longitudinal space resources are freed up; this space is used to raise the core reinforcing ribs (side stiffening plates) of the load-bearing base, transforming the previously ineffective space used for installing supports into an effective structure that strengthens the main body; and through precise weight balancing design, it ensures that overall optimization does not bring additional burden. This series of actions is a systematic innovation that is interconnected and mutually conditional. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a traditional steel pipe straightening machine; Figure 2 This is a schematic diagram of the structure of a traditional straightening machine frame; Figure 3 This is a schematic diagram of a traditional lower crossbeam structure. Figure 4 This is a schematic diagram of the optimized lower crossbeam structure of the present invention; Figure 5 This is a stress analysis cloud diagram of a traditional lower crossbeam under a load of 1500t; Figure 6 This is a stress analysis cloud diagram of the crossbeam under a load of 1500t according to the present invention; Figure 7 This is a deformation contour map of a traditional lower crossbeam under a load of 1500t; Figure 8 This is a deformation cloud diagram of the lower crossbeam of the present invention under a load of 1500t; Figure 9 This is a table comparing the relevant parameters of a conventional rack and the rack of this invention.

[0025] Explanation of reference numerals in the attached figures: 100: Straightening machine frame; 200: Fixed support; 300: Liftable support; 400: Lower movable crossbeam; 500: Upper movable crossbeam; 110: Upper crossbeam; 120: Column; 130: Lower crossbeam; 1300: Traditional lower crossbeam; 131: Frame; 132: Side stiffening plate; 133: Lifting support mounting plate; 134: Intermediate stiffening plate; 135: Fixed support mounting plate; 136: Heightened side stiffening plate; 137: Mounting base plate. Detailed Implementation

[0026] These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of this disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0028] Example 1 In a first aspect, the present invention provides a high-strength frame for a straightening machine, comprising a lower crossbeam 130, the lower crossbeam 130 comprising a frame 131, heightened side stiffeners 136 disposed on both sides of the frame 131, and a central stiffener 134 disposed in the middle of the frame 131. Heightened protrusions are provided on the side stiffeners 136, and the height of the side stiffeners 136 is higher than the height of the central stiffener 134.

[0029] Preferably, the straightening machine frame 100 further includes an upper crossbeam 110 and a column 120. The upper crossbeam 110 and the lower crossbeam 130 are connected by the column 120 and are arranged parallel to each other, one above the other.

[0030] Preferably, the lower crossbeam 130 also includes a mounting base plate 137. The mounting base plate 137 is welded to the raised side stiffener plate 136 to form a bearing surface for direct mounting of the straightening mechanism, thereby enabling the lower crossbeam 130 to have the dual integrated functions of a bearing base and a mounting support.

[0031] Preferably, a lifting support mounting plate 133 is provided above the intermediate stiffener plate 134 for mounting the lifting support 300, thereby driving the lower movable crossbeam 400 to move up and down.

[0032] Preferably, the raised portion of the heightened side stiffener 136 is triangular to optimize stress distribution.

[0033] Preferably, after the heightened side stiffener plate 136 is welded to the mounting base plate 137, the moment of inertia of its combined section is increased by more than 40% compared with the moment of inertia of the combined section of the traditional lower crossbeam 130 and fixed support 200.

[0034] Preferably, the difference between the increased weight of the raised protrusion of the raised side stiffener plate 136 and the reduced weight of the removed fixed support 200 is within ±10%.

[0035] Preferably, the upper crossbeam 110 and the lower crossbeam 130 are connected by a column 120 using prestressing.

[0036] Preferably, the straightening machine frame 100 is provided with a lower movable crossbeam 400 and an upper movable crossbeam 500. The lower movable crossbeam 400 and the upper movable crossbeam 500 are staggered on the column 120. The lower movable crossbeam 400 and the upper movable crossbeam 500 can reciprocate up and down under the guidance of the column 120.

[0037] Secondly, such as Figures 1 to 3 The image shows a traditional straightening machine and its frame structure. In the traditional design, a liftable support 300 is required between the lower movable crossbeam 400 and the traditional lower crossbeam 1300 to allow the lower movable crossbeam 400 to move up and down. Therefore, a liftable support mounting plate 133 is provided on the traditional lower crossbeam 1300 to mount the liftable support 300.

[0038] Therefore, the side stiffener plate 132 of the traditional lower crossbeam 1300 is relatively low, and a separate fixed support 200 needs to be installed on top to provide an installation surface.

[0039] like Figure 4 The image shows a preferred embodiment of the present invention. The core improvement of the high-strength frame for the straightening machine provided by the present invention lies in the lower crossbeam 130. The lower crossbeam 130 is a robust whole formed by welding together a frame 131, improved heightened side stiffeners 136 on both sides, a lifting support mounting plate 133, a middle stiffener 134, and a mounting base plate 137.

[0040] Specifically, the two raised side stiffeners 136 are designed with an upward-protruding structure, their height being significantly greater than that of the traditional side stiffeners 132. Furthermore, the upward-protruding structure is triangular, which better avoids stress concentration. The mounting base 137 is a thick steel plate, its end face directly welded to the top plane of the raised side stiffeners 136. In this way, the mounting base 137 and the two raised side stiffeners 136 together form a high-section load-bearing beam, directly replacing... Figure 1 The function of the fixed support 200 is as follows: The straightening mechanism that needs to be installed can be directly fixed to the mounting base plate 137 with bolts.

[0041] In this embodiment, the increased steel volume of the heightened side stiffener plate 136 is precisely calculated and designed so that its mass is approximately equal to the mass of the eliminated independent fixed support 200, and the mass of the eliminated fixed support mounting plate 135 is similar to the mass of the mounting base plate 137. Therefore, while achieving a significant leap in strength, the overall weight of the entire frame does not increase significantly.

[0042] This invention, through ingenious structural integration and mechanical optimization, effectively overcomes the limitations of traditional design and provides a high-strength, lightweight, and compact straightening machine frame solution with good prospects for industrial application.

[0043] Example 2 like Figure 4 As shown, the high-strength frame lower crossbeam 130 of this invention adopts an integrated design. The fixed support 200 is eliminated, and the original support function is integrated into the lower crossbeam 130 body. The heightened side stiffeners 136 on both sides are designed as heightened protrusions, increasing the height from the traditional 200mm to 380mm.

[0044] The mounting base plate 137 is a 40mm thick steel plate, and it is welded to the top of the heightened side stiffener plate 136 with double-sided bevel welding to form a combined cross section.

[0045] Specifically, the width of the heightened side stiffener plate is the same as the traditional design, with a width of 90mm.

[0046] Specifically, the moment of inertia of a single heightened side stiffener in this design In traditional design, the moment of inertia of a single side stiffener plate The increase in moment of inertia .

[0047] Specifically, the two cast iron fixed supports that were removed had a total weight of 300 kg, and the stiffening plates were heightened, increasing the volume of steel. The increased mass Taking into account the welding materials (approximately 5kg) and the optimized weight reduction of the mounting plate, the weight deviation is ±3.3% (within 5%).

[0048] Example 3 Static analysis was performed on the conventional structure and the structure of this invention under the same boundary conditions (fixed constraints) and load (1500T), with reference to... Figure 9 It can be seen that the mechanical properties of the lower crossbeam structure of this invention are significantly stronger than those of the traditional lower crossbeam structure.

[0049] refer to Figure 5 and Figure 6 The stress cloud diagram shows that traditional structures exhibit significant stress concentration (peak stress zone) at the support connections, while the structure of this invention has a uniform stress distribution without local spikes. Furthermore, the lower crossbeam is made of Q235-A material with a yield strength of 235 MPa. The stress cloud diagram results demonstrate that the safety factor of this invention is significantly improved.

[0050] refer to Figure 7 and Figure 8 The deformation cloud map shows that, compared with the traditional structure, the maximum deformation of the structure of the present invention is reduced by more than 40% under the same load.

[0051] Thus, it can be seen that this invention breaks with traditional design practices and redesigns a new structure, thereby resolving the contradictions in the original design and achieving a significant improvement in mechanical performance while maintaining the equipment's own weight and complete functionality. This provides a new approach to improving the mechanical performance of various large-scale equipment under conditions of "weight constraints" and "space constraints".

[0052] Example 4 This embodiment provides a straightening machine, which includes a straightening machine frame 100 having the structure of the lower crossbeam 130 of the present invention.

[0053] It also includes a liftable support, a lower movable crossbeam 400, and an upper movable crossbeam 500. The straightening machine frame 100 consists of an upper crossbeam 110, a column 120, and a lower crossbeam 130. The upper crossbeam 110 and the lower crossbeam 130 are connected by the column 120 using prestressing. The lower movable crossbeam 400 and the upper movable crossbeam 500 are staggered and installed on the column 120. The lower movable crossbeam 400 and the upper movable crossbeam 500 can reciprocate up and down under the guidance of the column 120.

[0054] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0055] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0056] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0057] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0058] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0059] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0060] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A straightening machine frame, comprising a lower crossbeam (130), characterized in that, The lower crossbeam (130) includes a frame (131), heightened side stiffeners (136) on both sides of the frame (131), and a middle stiffener (134) in the middle of the frame (131); heightened protrusions are provided on the heightened side stiffeners (136) on both sides, and the height of the heightened side stiffeners (136) is higher than the height of the middle stiffener (134).

2. The straightening machine frame according to claim 1, characterized in that, The straightening machine frame (100) also includes an upper crossbeam (110) and a column (120); the upper crossbeam (110) and the lower crossbeam (130) are connected by the column (120) and are arranged in parallel, one above the other.

3. The straightening machine frame according to claim 1, characterized in that, The lower crossbeam (130) also includes a mounting base plate (137); the mounting base plate (137) is welded to the raised side stiffener plate (136) to form a bearing surface for direct installation of the straightening mechanism, thereby enabling the lower crossbeam (130) to have the dual integrated functions of a bearing base and a mounting support.

4. The straightening machine frame according to claim 1, characterized in that, A lifting support mounting plate (133) is provided above the intermediate stiffening plate (134).

5. A straightening machine frame according to claim 1, characterized in that, The raised protrusion of the heightened side stiffener (136) is triangular.

6. A straightening machine frame according to claim 3, characterized in that, After the heightened side stiffener plate (136) is welded to the mounting base plate (137), the moment of inertia of its combined section is more than 40% greater than that of the combined section of the traditional lower crossbeam (130) and fixed support (200).

7. A straightening machine frame according to claim 6, characterized in that, The difference between the increased weight of the raised protrusion of the raised side stiffener (136) and the reduced weight of the removed fixed support (200) is within ±10%.

8. A straightening machine frame according to claim 2, characterized in that, The upper crossbeam (110) and the lower crossbeam (130) are connected by a column (120) using prestressing.

9. A straightening machine frame according to claim 2, characterized in that, The straightening machine frame (100) is provided with a lower movable crossbeam (400) and an upper movable crossbeam (500); the lower movable crossbeam (400) and the upper movable crossbeam (500) are installed alternately on the column (120); the lower movable crossbeam (400) and the upper movable crossbeam (500) can move up and down reciprocally under the guidance of the column (120).

10. A straightening machine, characterized in that, It includes the straightening machine frame as described in any one of claims 1-9.

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