Corrugated steel processing method

Abstract

The invention relates to the technical field of profile roll bending manufacturing, and provides a corrugated steel processing method which adopts continuous roll bending forming and comprises the following steps: S1, cold bending unit forming: a hot-rolled plate is fed into a cold bending unit to be subjected to multi-pass continuous deformation to obtain a corrugated steel blank, and in the continuous deformation process, a middle waveform is firstly formed, and then the middle waveform is formed; other waveforms are sequentially formed in the direction from the middle to the two sides; and S2, shaping through a shaping roller set, wherein the obtained corrugated steel blank is fed into the shaping roller set to be shaped, and the corrugated steel in the final shape is obtained. According to the invention, the deformation of each time can be more accurately controlled, and the forming precision is higher.

Description

Technical Field

[0001] The invention relates to the technical field of profile roll bending manufacturing, and in particular to a corrugated steel processing method. Background Art

[0002] Corrugated steel is widely used in various industries such as construction, transportation, and environmental protection engineering. Its overall shape is an undulating wave. According to the different cross-sectional shapes, it can be divided into V-shaped corrugated steel, trapezoidal corrugated steel and arc-shaped corrugated steel.

[0003] At present, corrugations are mostly formed by roll bending of hot-rolled plates. The existing forming method (such as the prior art with publication number "CN101954394A") is to first roll-bend the initial shape of the corrugated steel, and then deform it through multiple roll bending processes to obtain the final shape of the corrugated steel. This is equivalent to first forming a compressed corrugated steel, and then gradually stretching it outward to obtain the final shape of the corrugated steel. This method has the defects of difficulty in controlling the deformation amount and low forming accuracy because each waveform is deformed simultaneously in each pass. Summary of the invention

[0004] The object of the present invention is to provide a method for processing corrugated steel to solve the above-mentioned defects of the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for processing corrugated steel material, using continuous roll bending, comprises the following steps:

[0007] S1. Cold bending unit forming: The hot rolled plate is fed into the cold bending unit and continuously deformed for multiple times to obtain a corrugated steel blank. During the continuous deformation process, the waveform in the middle is first formed, and then the remaining waveforms are formed in sequence from the middle to both sides;

[0008] S2. Shaping by shaping roller group: the obtained corrugated steel blank is sent into the shaping roller group for shaping to obtain the corrugated steel of the final shape.

[0009] Optionally, in step S1, forming each waveform includes at least three continuous deformations.

[0010] Optionally, in the three-pass continuous deformation for forming each waveform, the angle change of the corresponding position between adjacent passes is 6°-10°.

[0011] Optionally, when the corrugated steel to be processed is a trapezoidal corrugated steel composed of a plurality of straight segments and a plurality of oblique segments, during the initial deformation of the oblique segment of each waveform, the straight segment of the waveform is simultaneously deformed into an arc segment, and the center of the arc segment is located outside the crest or trough.

[0012] Optionally, in step S2, when shaping the waveform in the middle, the straight line segments at the end are supported by rollers; when shaping the waveform at the end, the straight line segments in the middle are supported by rollers.

[0013] Optionally, in step S1, during the process of forming the waveform in the middle, guide rollers are provided between adjacent passes.

[0014] Optionally, before the hot-rolled plate is fed into the cold bending unit, a protective film is attached to the upper and lower surfaces of the hot-rolled plate.

[0015] Optionally, the hot-rolled plate is a steel strip whose width matches the unfolded width of the corrugated steel or a steel strip whose width matches the unfolded width of the corrugated steel after processing.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: in the present invention, the waveform in the middle is first formed during the continuous deformation process, and then the remaining waveforms are formed in sequence from the middle to the two sides, that is, each waveform is formed in the middle first and then the two sides, and the waveforms on both sides are formed one by one, which can more accurately control the deformation amount each time and has higher forming accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic flow chart of a corrugated steel processing method provided by the present invention;

[0018] Figure 2 It is a schematic diagram of the process roller matching of corrugated steel from the first pass to the third pass;

[0019] Figure 3 The schematic diagram of the process roller matching for the fourth to sixth passes of corrugated steel;

[0020] Figure 4 It is a schematic diagram of the process roller matching of the seventh to ninth passes of corrugated steel;

[0021] Figure 5 It is a schematic diagram of the process roll matching of the tenth to twelfth passes of corrugated steel;

[0022] Figure 6 It is a schematic diagram of the process roller matching of the corrugated steel from the 13th to the 15th pass;

[0023] Figure 7 It is a schematic diagram of the process roll matching of the 16th to 18th passes of corrugated steel;

[0024] Figure 8 for Figure 2 A in the enlarged view;

[0025] Reference numerals: 1-corrugated steel, 101-straight line segment, 102-oblique line segment. DETAILED DESCRIPTION

[0026] refer to Figure 1 A method for processing corrugated steel using continuous roll bending comprises the following steps:

[0027] S1, cold bending unit forming; specifically, in this step, the hot-rolled plate is fed into the cold bending unit and subjected to multiple continuous deformations to obtain a corrugated steel blank. The hot-rolled plate is a steel strip whose width matches the unfolded width of the corrugated steel 1 or a steel strip whose width matches the unfolded width of the corrugated steel 1 after processing. In practical applications, the hot-rolled plate should be leveled before being fed into the cold bending unit to avoid subsequent defects caused by uneven hot-rolled plates. In addition, in this embodiment, before the hot-rolled plate is fed into the cold bending unit, a protective film is attached to the upper and lower surfaces of the hot-rolled plate to prevent scratches on the hot-rolled plate in the subsequent roll bending forming process, thereby improving the surface quality of the corrugated plate.

[0028] Among them, in the continuous deformation process, the waveform in the middle is formed first, and then the remaining waveforms are formed in sequence from the middle to the two sides, that is, each waveform is formed in the middle first and then the two sides, and the waveforms on both sides are formed one by one, which can accurately control the deformation amount each time and achieve higher forming accuracy. In order to improve processing efficiency, the waveforms on both sides can be formed symmetrically at the same time. It is easy to understand that if the waveform in the middle is used as a reference, and the number of waveforms on one side is one more than that on the other side, the extra waveform will be formed separately in the last step.

[0029] S2, shaping by shaping roller group; that is, this step is to send the corrugated steel blank obtained in step S1 into the shaping roller group for shaping to obtain the corrugated steel 1 of the final shape.

[0030] It is easy to understand that the number of forming passes in step S1 and the number of shaping passes in step S2 are determined according to the number of waveforms of the corrugated steel 1. The more waveforms of the corrugated steel 1, the more corresponding forming passes and shaping passes.

[0031] In step S1, forming each waveform includes at least three continuous deformations, that is, the forming of each waveform is gradually rolled to the final shape through multiple passes, which is convenient for more accurate control of shape changes during the forming process, effectively controlling the amount of springback, and achieving higher forming accuracy. On this basis, as a preferred solution, the forming of each waveform in this embodiment is performed through three continuous deformations.

[0032] On the basis of the above, in the three continuous deformations of each waveform, the angle change between the corresponding positions of adjacent passes is 6°-10°. In this example, the angle change between the corresponding positions of adjacent passes is selected to be 9°. In other embodiments, 6° or 10° can be selected. Of course, other angles can also be selected.

[0033] On the basis of the above, the corrugated steel material 1 to be processed is a trapezoidal corrugated steel material 1 composed of a plurality of straight line segments 101 and a plurality of oblique line segments 102. For example, the angle between the oblique line segment 102 and the adjacent straight line segment 101 is 34°. Figure 2-Figure 7 ,According to the total number of waveforms, the forming passes are divided into twelve times, and the shaping passes are divided into six times, that is, the first to the twelfth passes are forming passes, and the thirteenth to the eighteenth passes are shaping passes.

[0034] The first to third passes form the waveform in the middle, wherein the first pass forms the oblique line segment 102 of the waveform in the middle into 9°, the second pass forms the oblique line segment 102 of the waveform in the middle into 18°, the third pass forms the oblique line segment 102 of the waveform in the middle into 27°, and the fourth to eleventh passes gradually form the remaining waveforms in order from the middle to both sides, wherein the fourth pass forms the oblique line segment 102 of the waveform adjacent to the middle into 9° and the oblique line segment 102 of the middle waveform into 34°, and so on, and each waveform is gradually formed to obtain a corrugated steel blank, which is subsequently shaped through the thirteenth to eighteenth passes to obtain the final shape of the corrugated steel 1.

[0035] In this embodiment, in step S1, during the process of forming the waveform in the middle, guide rollers are provided between adjacent passes (i.e., between the first pass and the second pass, and between the second pass and the third pass) to prevent deviation.

[0036] In step S2, when the waveform in the middle is shaped, the end straight section 101 is supported by rollers; when the waveform in the end is shaped, the middle straight section 101 is supported by rollers. Such an arrangement is beneficial to reducing the use of rollers.

[0037] On the basis of the above, during the initial deformation process of the oblique line segment 102 of each waveform, the straight line segment 101 of the waveform at that location is simultaneously deformed into an arc segment, and the center of the arc segment is located outside the crest or trough, that is, if it is at the crest, the arc segment is concave downward, and if it is at the trough, the arc segment is convex upward. It is worth noting that such a setting helps to reduce the rebound amount of the oblique line segment 102 and further improve the forming accuracy.

[0038] refer to Figure 2 and Figure 8 Taking the initial deformation of the oblique line segment 102 in the middle of the waveform as an example, that is, in the first pass, since the straight line segment 101 in the middle of the waveform in this example is the trough, in the first pass, the straight line segment 101 at this location is simultaneously deformed into an upwardly convex arc segment. It should be understood that the curvature of the arc segment should not be too large to avoid excessive deformation and difficulty in shaping.

[0039] In addition, it should be noted that each pass in the figure only shows the hot-rolled plate at the current forming waveform and the already formed waveform. It should be understood that the hot-rolled plates on both sides of the figure that have not been deformed are not shown. This represents the first to eighteenth passes, and the shaded figures in the figure represent the rollers.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for processing corrugated steel, using continuous roll bending, characterized in that: The following steps are involved: S1. Cold bending unit forming: The hot rolled plate is fed into the cold bending unit and continuously deformed for multiple times to obtain a corrugated steel blank. During the continuous deformation process, the waveform in the middle is first formed, and then the remaining waveforms are formed in sequence from the middle to both sides; S2. Shaping by shaping roller group: the obtained corrugated steel blank is sent into the shaping roller group for shaping to obtain the corrugated steel of the final shape.

2. The method for processing corrugated steel according to claim 1, characterized in that: In step S1, forming each waveform includes at least three continuous deformations.

3. The method for processing corrugated steel according to claim 2, characterized in that: In the three-pass continuous deformation of each waveform, the angle change between the corresponding positions of adjacent passes is 6°-10°.

4. The method for processing corrugated steel according to claim 1, characterized in that: When the corrugated steel to be processed is a trapezoidal corrugated steel composed of a plurality of straight segments and a plurality of oblique segments, during the initial deformation process of the oblique segment of each waveform, the straight segment of the waveform is simultaneously deformed into an arc segment, and the center of the arc segment is located outside the crest or trough.

5. The method for processing corrugated steel according to claim 4, characterized in that: In step S2, when the waveform in the middle is shaped, the straight line segments at the end are supported by rollers; when the waveform at the end is shaped, the straight line segments in the middle are supported by rollers.

6. The method for processing corrugated steel according to claim 1, characterized in that: In step S1, during the process of forming the waveform in the middle, guide rollers are provided between adjacent passes.

7. The method for processing corrugated steel according to claim 1, characterized in that: Before the hot rolled plate is fed into the cold bending unit, a protective film is attached to the upper and lower surfaces of the hot rolled plate.

8. The method for processing corrugated steel material according to claim 1, characterized in that: The hot-rolled plate is a steel strip whose width matches the unfolded width of the corrugated steel or a steel strip whose width matches the unfolded width of the corrugated steel after processing.

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