A processing device for U-shaped ribs of medium-thick steel plates and a working method thereof

Abstract

The present application relates to the technical field of steel structure bridge, and particularly relates to a processing equipment for medium-thick steel plate U-shaped rib and a working method thereof, wherein an inner mold is reciprocated and pressure-kept into an L-shaped type by a hydraulic cylinder body; the hydraulic cylinder body is retracted after pressure-keeping, the plate is changed into a right angle from an acute angle elastic rebound, and then the L-shaped plate is fixed; the inner mold is reciprocated and pressure-kept again by the hydraulic cylinder body, and the hydraulic device is retracted after pressure-keeping to form a standard U-shaped type. The present application drives the inner mold to laterally push the processing plate by the hydraulic cylinder body, changes the flat plate into an L-shaped type, fixes the L-shaped plate by a fixing clamp, and changes the L-shaped plate into a U-shaped plate by secondary hydraulic pushing, so as to solve the defects of difficult demolding, low efficiency and plate damage caused by the up-down stress of the mold driven by a press in the prior art. The present application can complete the U-shaped processing by lateral pushing, effectively control the U-shaped geometric size, conveniently demold, be high in safety, improve the production efficiency, have no waste product, and greatly improve the economic and social benefits.

Description

Technical Field

[0001] This invention relates to the field of steel structure bridge technology, and in particular to a processing equipment for U-shaped ribs of medium-thick steel plates and its working method. Background Technology

[0002] With the development of steel structure bridges in China, the processing technology for steel structure bridges has also become increasingly mature. Currently, most existing processing technologies for medium and thick steel plate U-shaped rings use a straight-up and straight-down integrated mold, relying on a press for stamping. However, such molds do not handle the springback deformation of the steel plate. During the demolding process, the steel plate will cause the U-shape, which should be a right-angle structure, to become an irregular obtuse-angle structure due to its own springback deformation, affecting subsequent installation. At the same time, the bulging of the mold makes demolding difficult, resulting in insufficient component precision and low work efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention discloses a processing equipment for U-shaped ribs in medium-thick steel plates and its working method.

[0004] The specific technical solution is as follows: A processing device for U-shaped ribs in medium-thick steel plates includes a processing platform, a hydraulic cylinder, a fixed clamping back plate, and a sliding clamping back plate. The fixed clamping back plate is fixed at both ends to the working platform. One end is hinged to one end of an L-shaped baffle via a free-rotating shaft, with the L-shaped baffle bending inwards. The other end is hinged to one end of the sliding clamping back plate via a fixed rotating shaft. An arc-shaped groove is formed on the processing platform along the rotation path of the sliding clamping back plate around the fixed rotating shaft. A sliding rotating shaft is installed on one side of the free end of the sliding clamping back plate, and slides within the groove. An outer mold is installed at the inner angle of the L-shaped baffle's bend, and the outer mold is installed at the inner angle formed by the fixed clamping back plate and the sliding clamping back plate. The hydraulic cylinder is installed inside the angle formed by the fixed clamping back plate and the sliding clamping back plate, and an inner mold is installed at its front end.

[0005] Multiple sliding bearings are installed on the fixed and sliding back plates to reduce friction when the plate slides and protect the plate.

[0006] The outer side of the fixed top clamping back plate is limited by several fixed stops, which are fixed to the processing platform by screws.

[0007] After the position of the sliding top clamping back plate on the processing platform is selected, the outer side of the sliding top clamping back plate is limited by several movable stops, which are fixed to the processing platform by screws.

[0008] The outer mold has a curved structure and is connected to an L-shaped baffle, a fixed top clamping back plate, or a sliding top clamping back plate by spot welding.

[0009] A fixing clamp is installed on the L-shaped baffle to fix one end of the plate.

[0010] The working method for the equipment used in processing U-shaped ribs of medium and heavy steel plates specifically includes the following steps: (1) First, according to the size of the U-shaped rib to be processed, the fixed clamping back plate is positioned at the upper limit of the processing platform by installing a fixed stop on the outside of the fixed clamping back plate; (2) The sliding rotation shaft of the sliding top clamping back plate slides in the slide groove, thereby adjusting the angle between the sliding top clamping back plate and the fixed top clamping back plate to be an acute angle. After adjustment, the position of the sliding top clamping back plate on the processing platform is selected. The sliding top clamping back plate is positioned at the upper limit of the processing platform by installing a movable stop on the outside of the sliding top clamping back plate. (3) Fix one end of the plate with a fixing clamp, and abut the other end against the free end of the sliding back plate; (4) Start the hydraulic cylinder, the inner mold is pushed out, and the L-shaped baffle rotates and buckles inward around the free axis under the thrust of the inner mold. The plate is formed under the combined action of the outer mold and the inner mold installed on the inside of the angle formed by the fixed top tightening back plate and the sliding top tightening back plate. The hydraulic cylinder presses back and forth several times to complete the first L-shaped bend. (5) Open the fixing clamp, remove the L-shaped bent plate, and move the first bend to the L-shaped baffle side. Fix the first bend with the fixing clamp, and the other end of the plate is still in contact with the free end of the sliding back plate. (6) Start the hydraulic cylinder, the inner mold is pushed out, and the L-shaped baffle rotates inward around the free axis again under the thrust of the inner mold. The plate is formed again under the combined action of the outer mold and the inner mold installed on the inside of the included angle formed by the fixed and sliding back plates. The outer mold of the bending inner angle of the L-shaped baffle holds the bending of the first forming. The hydraulic cylinder repeats the pressure several times to complete the second U-shaped bend. Compared with the prior art, the present invention has the following beneficial technical effects: This invention relates to the development of technical equipment for bending medium and thick steel plates. Side-push cold bending effectively improves dimensional accuracy while preserving the properties of the raw materials. It solves the problem of dimensional accuracy during the bending deformation process of the plates, reduces the number of bending operations, lowers equipment maintenance rates, and significantly improves production efficiency compared to U-shaped upper and lower hydraulic molds. It also facilitates demolding and enhances the economic and social benefits of the manufacturing process.

[0011] The process involves a hydraulic cylinder pushing an inner mold to reciprocate and maintain pressure to form an L-shape. After maintaining pressure, the hydraulic cylinder retracts, and the sheet metal springs back from an acute angle to a right angle, then the L-shaped sheet is fixed. The hydraulic cylinder then pushes the inner mold again to reciprocate and maintain pressure, and after the hydraulic device retracts, a standard U-shape is formed. This invention solves the shortcomings of existing technologies in producing U-shaped ribs from steel plates, such as difficulty in demolding, low efficiency, and damage to the sheet metal caused by the pressure exerted on the mold by a press. This invention can complete the U-shaped processing through lateral pushing, effectively controlling the U-shaped geometry. The blanking dimensions are calculated based on the size of the U-shaped stiffening ribs. The sheet metal is clamped in the mold according to the size of the U-shaped stiffening ribs and hydraulically bent. Corresponding technical parameters are input according to different sheet thicknesses and bending angles. Processing using this bending technology will not cause the sheet metal bending dimensions to exceed tolerances. The bending dimensions are accurate, ensuring that the angle of the U-shaped ribs in the produced medium-thick plates is a compliant right angle, with accurate dimensions, convenient for later assembly and use, safe and convenient demolding, high production efficiency, and no scrap, greatly improving economic and social benefits. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the processing equipment of the present invention; Figure 2 This is a schematic diagram of the initial state of the process according to the present invention; Figure 3 This is a schematic diagram of the first L-shaped bend of the present invention; Figure 4 This is a schematic diagram of the state before secondary processing of the present invention; Figure 5 This is a schematic diagram of the second U-shaped bend in this invention.

[0013] In the diagram, 1. Processing platform; 2. Hydraulic cylinder; 3. Fixed clamping back plate; 4. Sliding clamping back plate; 5. L-shaped baffle; 6. Fixed rotating shaft; 7. Sliding rotating shaft; 8. Movable stop; 9. Fixed clamp; 10. Fixed stop; 11. Sliding bearing; 12. Outer mold; 13. Inner mold; 14. Free rotating shaft; 15. Slide groove; 16. Plate material. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the drawings.

[0015] Figure 1The figure shows a schematic diagram of the processing equipment of the present invention. The present invention is used for processing U-shaped ribs of medium and thick steel plates, including a processing platform 1, a hydraulic cylinder 2, a fixed clamping back plate 3, and a sliding clamping back plate 4. The two ends of the fixed clamping back plate 3 are fixed on the working platform 1. One end is hinged to one end of an L-shaped baffle 5 through a free rotating shaft 14, with the L-shaped baffle 5 bending inward. The other end is hinged to one end of the sliding clamping back plate 4 through a fixed rotating shaft 6. An arc-shaped groove 15 is opened on the processing platform 1 along the rotation path of the sliding clamping back plate 4 around the fixed rotating shaft 6. A sliding rotating shaft 7 is installed on one side of the free end of the sliding clamping back plate 4, and the sliding rotating shaft 7 slides in the groove 15. An outer mold 12 is installed at the inner angle of the bending of the L-shaped baffle 5, and the outer mold 12 is installed at the inner angle formed by the fixed clamping back plate 3 and the sliding clamping back plate 4. The hydraulic cylinder 2 is installed on the inner side of the angle formed by the fixed clamping back plate 3 and the sliding clamping back plate 4, and an inner mold 13 is installed at its front end.

[0016] Multiple sliding bearings 11 are installed on the fixed clamping back plate 3 and the sliding clamping back plate 4 to reduce friction when the plate 16 slides and protect the plate 16. The outer side of the fixed clamping back plate 3 is limited by several fixed stops 10, which are fixed to the processing platform 1 by screws.

[0017] After the position of the sliding top clamping back plate 4 on the processing platform 1 is selected, the outer side of the sliding top clamping back plate 4 is limited by several movable stop plates 8, which are fixed to the processing platform 1 by screws.

[0018] The outer mold 12 has a curved structure and is connected to the L-shaped baffle 5, the fixed top clamping back plate 3, or the sliding top clamping back plate 4 by spot welding.

[0019] Fixing clamps 9 are installed on the L-shaped baffle 5 to fix one end of the plate 16.

[0020] The working method of the equipment for processing U-shaped ribs of medium and heavy steel plates according to the present invention specifically includes the following steps: (1) First, according to the size of the U-shaped rib to be processed, the fixed clamping back plate 3 is positioned at the upper limit of the processing platform 1 by installing the fixed clamping back plate 3 on the outside of the fixed clamping back plate 3; (2) The sliding rotation shaft 7 of the sliding top clamping back plate 4 slides in the slide groove 15, thereby adjusting the angle between the sliding top clamping back plate 4 and the fixed top clamping back plate 3 to be an acute angle. After adjustment, the position of the sliding top clamping back plate 4 on the processing platform 1 is selected. The sliding top clamping back plate 4 is positioned at the upper limit of the processing platform 1 by installing the movable stop 8 on the outside of the sliding top clamping back plate 4. (3) Fix one end of the plate 16 with the fixing clamp 9, and abut the other end against the free end of the sliding back plate 4. This is the initial state, as shown. Figure 2 As shown; (4) Start the hydraulic cylinder 2, the inner mold 13 is pushed out, and the L-shaped baffle 5 rotates inward around the free-rotating shaft 14 under the thrust of the inner mold 13. The plate 16 is formed under the combined action of the outer mold 12 and the inner mold 13 installed on the inside of the included angle formed by the fixed top clamping back plate 3 and the sliding top clamping back plate 4. The hydraulic cylinder 2 reciprocates and holds pressure several times to complete the first L-shaped bend, as shown. Figure 3 As shown; (5) Open the fixing clamp 9, remove the L-shaped bent plate 16, and move the first bend towards the L-shaped baffle 5. Fix the first bend with the fixing clamp 9. The other end of the plate 16 is still in contact with the free end of the sliding back plate 4. This is the state before secondary processing. Figure 4 As shown; (6) Start the hydraulic cylinder 2, the inner mold 13 is pushed out, and the L-shaped baffle 5 rotates inward around the free pivot 14 again under the thrust of the inner mold 13. The plate 16 is re-formed under the combined action of the outer mold 12 and the inner mold 13 installed on the inside of the included angle formed by the fixed top clamping back plate 3 and the sliding top clamping back plate 4. The outer mold 12 of the L-shaped baffle 5 holds the bend of the first forming. The hydraulic cylinder 2 repeats the pressure several times to complete the second U-shaped bend, as shown. Figure 5 As shown.

Claims

1. A working method for a processing equipment for U-shaped ribs in medium-thick steel plates, characterized in that, Specifically, the following steps are included: (1) First, according to the size of the U-shaped rib to be processed, the fixed clamping back plate (3) is positioned at the upper limit of the processing platform (1) by installing a fixed stop (10) on the outside of the fixed clamping back plate (3); (2) The sliding rotation shaft (7) of the sliding top clamping back plate (4) slides in the slide groove (15) to adjust the angle between the sliding top clamping back plate (4) and the fixed top clamping back plate (3) to be an acute angle. After adjustment, the position of the sliding top clamping back plate (4) on the processing platform (1) is selected. The sliding top clamping back plate (4) is positioned at the upper limit on the processing platform (1) by installing a movable stop (8) on the outside of the sliding top clamping back plate (4). (3) Fix one end of the plate (16) with a fixing clamp (9) and abut the other end against the free end of the sliding top clamping back plate (4); (4) Start the hydraulic cylinder (2), the inner mold (13) is pushed out, the L-shaped baffle (5) rotates inward around the free rotation axis (14) under the thrust of the inner mold (13), the plate (16) is formed under the combined action of the outer mold (12) and the inner mold (13) installed on the inside of the included angle formed by the fixed top tightening back plate (3) and the sliding top tightening back plate (4), and the hydraulic cylinder (2) holds pressure several times to complete the first L-shaped bend; (5) Open the fixing clamp (9), remove the L-shaped bent plate (16), and move the first bend to the side of the L-shaped baffle (5). Fix the first bend with the fixing clamp (9), and the other end of the plate (16) still abuts against the free end of the sliding back plate (4). (6) Start the hydraulic cylinder (2), the inner mold (13) is pushed out, and the L-shaped baffle (5) rotates inward around the free rotation axis (14) again under the thrust of the inner mold (13). The plate (16) is formed again under the combined action of the outer mold (12) and the inner mold (13) installed on the inside of the included angle formed by the fixed top clamping back plate (3) and the sliding top clamping back plate (4). The outer mold (12) of the bending inner angle of the L-shaped baffle (5) holds the bending of the first forming. The hydraulic cylinder (2) repeats the pressure several times to complete the second U-shaped bending. The two ends of the fixed top clamping back plate (3) are fixed on the processing platform. One end is hinged to one end of the L-shaped baffle (5) through the free rotating shaft (14), and the L-shaped baffle (5) bends inward. The other end is hinged to one end of the sliding top clamping back plate (4) through the fixed rotating shaft (6). The sliding top clamping back plate (4) has an arc-shaped groove (15) on the processing platform (1) along the rotation path of the fixed rotating shaft (6). The sliding rotating shaft (7) is installed on one side of the free end of the sliding top clamping back plate (4), and the sliding rotating shaft (7) slides in the groove (15). The outer mold (12) is installed at the inner angle of the bend of the L-shaped baffle (5), and the outer mold (12) is installed at the inner angle formed by the fixed top clamping back plate (3) and the sliding top clamping back plate (4). The hydraulic cylinder (2) is installed on the inner side of the angle formed by the fixed top clamping back plate (3) and the sliding top clamping back plate (4), and the inner mold (13) is installed at the front end. The outer side of the fixed top clamping back plate (3) is limited by several fixed stops (10), which are fixed to the processing platform (1) by screws; After the position of the sliding top clamping back plate (4) on the processing platform (1) is selected, the outer side of the sliding top clamping back plate (4) is limited by several movable stop plates (8), and the movable stop plates (8) are fixed on the processing platform (1) by screws; A fixing clamp (9) is installed on the L-shaped baffle (5) to fix one end of the plate (16).

2. The working method of the equipment for processing U-shaped ribs of medium and heavy steel plates according to claim 1, characterized in that: Multiple sliding bearings (11) are installed on the fixed top clamping back plate (3) and the sliding top clamping back plate (4) to reduce friction when the plate (16) slides and to protect the plate (16).

3. The working method of the equipment for processing U-shaped ribs of medium and heavy steel plates according to claim 1, characterized in that: The outer mold (12) is a curved structure and is connected to the L-shaped baffle (5), the fixed top clamping back plate (3), or the sliding top clamping back plate (4) by spot welding.

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