Method for dynamic circulation and rapid splicing of steel bars

Abstract

This invention relates to a method for rapid dynamic cyclic splicing of reinforcing bars, comprising the following steps: S1, cutting reinforcing bar raw materials of different lengths, converting the method of splicing reinforcing bars of different lengths into a method of cutting the target length reinforcing bars into reinforcing bars of different lengths; S2, directly splicing the unbent reinforcing bar raw materials, and the resulting cutting method after converting the unbent reinforcing bar splicing method, considering staggered joints, minimal splicing, and minimal waste; S3, splicing the bent reinforcing bar raw materials, and the resulting cutting method after converting the bent reinforcing bar splicing method, considering the safety thresholds of the bending point and the cutting point. This invention can scientifically and rationally formulate a reinforcing bar splicing processing plan in a short period of time, effectively improving the efficiency of reinforcing bar splicing processing and reducing the reinforcing bar waste rate.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing for steel bar splicing, and more specifically, to a method for rapid splicing of steel bars through dynamic circulation. Background Technology

[0002] As a core construction material, steel reinforcement typically requires customized processing such as splicing and bending based on specific construction requirements. Currently, during construction, steel reinforcement processing is usually done by construction workers who rely on experience to develop splicing and processing plans. When the project is large-scale, the steel reinforcement processing task becomes arduous, and relying on manual experience to develop processing plans is slow and difficult to guarantee, easily leading to steel waste. How to develop scientific and reasonable steel reinforcement processing plans to improve processing efficiency and reduce waste has gradually become a focus of current research. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for dynamic cyclic rapid splicing of reinforcing bars, which can realize the intelligent formulation of reinforcing bar splicing processing schemes, improve the efficiency of reinforcing bar processing operations, and reduce material waste.

[0004] The technical solution adopted by this invention to solve its technical problem is: to construct a method for dynamic cyclic rapid splicing of reinforcing bars, comprising the following steps:

[0005] S1. Cut steel bars of different lengths;

[0006] S2. Directly splice the unbent steel reinforcement materials;

[0007] S3. Splice the bent steel bars together.

[0008] According to the above scheme, the method for cutting steel bars of different lengths in step S1 includes the following steps:

[0009] S101, the length is L The steel reinforcement raw material is cut into l 1. l 2. l For steel bar raw materials of length 3, the longer raw materials are cut first. When the remaining length does not reach the shortest raw material length, it is considered to be the shortest steel bar raw material length.

[0010] S102, with length as L The number of steel bars cut into different steel bar materials is the number of steel bar materials required for splicing and assembly.

[0011] According to the above scheme, the method for splicing non-bent steel reinforcement materials in step S2 includes the following steps:

[0012] S201, Length of steel reinforcement material LPrioritize cutting the longest raw material; the maximum number of materials that can be cut is:

[0013] ,

[0014] After the first round of cutting, the remaining length of the steel rebar is:

[0015] ;

[0016] S202, Remaining Length of Rebar Raw Materials By successively decreasing the length of the raw material to be cut, the maximum number of cuts is:

[0017] ,

[0018] After the second round of cutting, the remaining length of the rebar is:

[0019] ;

[0020] S203, Remaining length of steel reinforcement material If there are uncut steel rebar materials, repeat steps S201-S202 until the shortest steel rebar material is cut. The maximum number of rebar materials that can be cut is:

[0021] ,

[0022] After the shortest rebar raw material is cut, the rebar raw material cutting is complete, and the rebar waste is:

[0023] ;

[0024] S204. Convert the cut steel bar material into non-bending steel bar splicing.

[0025] According to the above scheme, the method for bending and splicing reinforcing bars in step S3 includes the following steps:

[0026] S301. Convert 50% of the bent reinforcing bars to ideal straight bars, starting from the leftmost point; convert 50% of the bent reinforcing bars to ideal straight bars, starting from the rightmost point; total length of bent reinforcing bars. L To transform the bent steel bars into ideal straight bars, assuming the initial point "0" is the leftmost point, the bending points are marked sequentially as follows: lb 1, lb 2, lb 3, lb 4, and 0 < lb 1< lb 2< lb 3< lb 4< L；

[0027] S302. Start cutting from the initial point, with the cutting points as follows: lc 1, lc 2, lc 3, and 0 < lc 1< lc 2< lc 3< L；

[0028] S303. Employ a dynamic cyclic inspection cutting method to ensure that the cutting point and its nearest bending point meet a safety threshold. SL Continue until all lengths of the reinforcing bars have been cut;

[0029] S304. Convert the cut steel bar raw material into a scheme with bent steel bar splicing.

[0030] According to the above scheme, the cutting point and bending point of the bent steel bar should be kept at a safe distance.

[0031] According to the above scheme, the safe distance between the cutting point and the bending point of the bent steel bar is not less than a safety threshold of 50cm.

[0032] According to the above scheme, the dynamic cyclic inspection cutting method in step S303 includes the following steps:

[0033] S303a. Start cutting the first section of steel bar material from the initial point, prioritizing the cutting of longer steel bar material. If cutting is ineffective, shorten the length of the steel bar material to be cut in sequence.

[0034] S303b, Compare the cutting point with the safe distance from its nearest bending point;

[0035] S303c: If the distance between the cutting point and the bending point meets the safety threshold, the cutting of this section of steel reinforcement material is valid, and S303f shall be executed.

[0036] S303d: If the distance between the cutting point and the bending point does not meet the safety threshold, the cutting of this raw material is invalid, and S303e is executed.

[0037] S303e: If the length of the steel bar material in this section is the shortest, then the current cutting plan is discarded. The length of the steel bar material to be cut is selected according to the minimum waste in a single cycle. At this time, the cutting point is located at a position less than the safety threshold of the bending point. Then, S303f is executed.

[0038] S303f: Using the cutting point of the previous section of steel bar material as the starting point, start cutting the next section of steel bar material. Repeat S303a ~ S303f until all lengths of steel bar material are cut. The last section of steel bar material is cut according to the minimum waste scheme for a single cycle.

[0039] According to the above scheme, the minimum waste solution for a single cycle in step S303f includes the following steps:

[0040] S303f-1: If it is the last section of steel bar material to be cut, calculate the difference between the remaining steel bar length and the length of different materials, and select the material with the smallest difference; otherwise, execute S304f-2.

[0041] S303f-2: Calculate the difference between the distance between the cutting points and the safety threshold of the bending point for different lengths of steel reinforcement materials, and select the steel reinforcement material with the smallest difference.

[0042] The method for rapid dynamic cyclic splicing of reinforcing bars according to the present invention has the following beneficial effects:

[0043] This invention effectively reduces the complexity of rebar splicing by transforming the problem into a rebar splicing and cutting problem. It proposes a dynamic cyclic correction cutting method to meet actual production needs, representing a major innovation in intelligent manufacturing of rebar splicing processing. It has good application prospects in improving splicing processing efficiency and reducing waste rate. Attached Figure Description

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0045] Figure 1 This is a flowchart of the dynamic cyclic rapid splicing method for reinforcing bars of the present invention;

[0046] Figure 2 This is a schematic diagram illustrating the transformation of the rebar splicing problem into a cutting problem in this invention;

[0047] Figure 3 This is a schematic diagram illustrating the problem of steel bar cutting in this invention;

[0048] Figure 4 This is a schematic diagram illustrating the dynamic cyclic inspection of cutting after the conversion of rebar splicing in this invention;

[0049] Figure 5 This is a schematic diagram of the minimum waste solution for a single cycle in solving the problem of cutting steel bars after splicing and conversion according to the present invention. Detailed Implementation

[0050] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0051] like Figure 1-5 As shown, the dynamic cyclic rapid splicing method for reinforcing bars of the present invention includes: cutting reinforcing bar raw materials of different lengths, directly splicing unbent reinforcing bar raw materials, and splicing bent reinforcing bar raw materials.

[0052] The initialization process for rebar splicing involves cutting rebar of different lengths. Specifically, this involves converting the splicing of rebar of different lengths into the cutting of the target length rebar. For non-bending rebar splicing, the process involves converting the spliced ​​rebar into non-bending rebar cutting, considering staggered joint requirements, splicing length, and splicing method, while minimizing waste. For bending rebar splicing, the process involves considering special requirements for the bending point, splicing length, splicing method, and staggered joint requirements, and based on the safety thresholds of the bending and cutting points, converting the bending rebar splicing into cutting rebar. Firstly, converting rebar splicing into rebar cutting reduces splicing complexity. Secondly, schemes are developed for both non-bending and bending rebar splicing, and a dynamic cyclic inspection cutting method is used to achieve rebar processing under complex rules.

[0053] like Figure 1 As shown, rebar splicing is the technical approach to achieving rebar splicing and assembly. Specifically, it involves transforming rebar splicing into rebar cutting, that is, converting the splicing of rebar of different lengths to the target length rebar into cutting the target length rebar using rebar of different lengths. The target length rebar is cut using rebar of different lengths; assuming the rebar material length is... l The lengths of the raw steel bars are respectively l 1. l 2. l 3, and l 1> l 2> l 3. The target rebar length is L。 The existing method is: with a certain number l 1. l 2. l 3. Raw material combination for length L If the raw materials of the steel bars do not meet the final splicing requirements, the shortest raw material shall be cut before splicing.

[0054] In a preferred embodiment of the present invention, the method for cutting steel bars of different lengths is as follows: cutting steel bars of length... L Steel reinforcement raw materials, cut into l 1. l 2. l 3. For raw materials of different lengths, prioritize cutting the longer ones; if the remaining length does not reach the minimum raw material length, then it is considered the minimum raw material length; such as Figure 2 As shown, with a length of L The quantity of different raw materials cut from the steel bars is the quantity of raw materials required for splicing and assembly, i.e., the cutting scheme.

[0055] In a preferred embodiment of the present invention, the non-bending steel bar splicing, considering factors such as staggered joints, minimal splicing, and minimal waste, involves cutting the spliced ​​section, such as... Figure 3 As shown, firstly, according to the target rebar length is... L Cutting: Prioritize cutting the longest raw material; maximum number of cuts is [number missing]. After the first round of cutting, the remaining length of the rebar was: Secondly, the remaining length of the reinforcing steel. The length of the raw material to be cut is decreased sequentially, with a maximum number of cuts. After the second round of cutting, the remaining length of the rebar was: Subsequently, the remaining length of the reinforcing steel... If there are uncut pieces of material, repeat the above steps until the shortest piece of material is cut. The maximum number of cuts is [number missing]. After the shortest raw material is cut, the steel bar cutting is complete, and the waste material is... Finally, considering factors such as staggered joints, splicing, and cutting, the various raw material schemes were transformed into non-bending rebar splicing schemes after cutting. Among them, the straight rebar staggered joint scheme adopted the method of swapping the two ends.

[0056] In a preferred embodiment of the present invention, the splicing of bent reinforcing bars, considering the special requirements of the bending point, splicing length, and staggered splicing method, is a splicing of bent reinforcing bars with special requirements. Compared with splicing of non-bent reinforcing bars, it is necessary to consider the safety threshold between the bending point and the cutting point, that is, the cutting point and the bending point must maintain a certain distance. In actual operation, a safety threshold of 50cm is usually maintained, transforming the splicing of bent reinforcing bars into the cutting of reinforcing bars, such as... Figure 4 As shown. First, considering the staggered joint requirements, the initial points are swapped. 50% of the bent reinforcing bars are converted to ideal straight bars starting from the leftmost point, and the other 50% are converted to ideal straight bars starting from the rightmost point. The total length L of the bent reinforcing bars is considered as straight bars. Assuming the bending points are marked sequentially from the leftmost point (position "0"), the positions are as follows: lb 1, lb 2, lb 3, lb 4, and 0 < lb 1< lb 2< lb 3< lb 4< L Secondly, starting from the initial point, the cutting points are as follows: lc 1, lc 2, lc 3, and 0 < lc 1< lc 2< lc 3< LSubsequently, a dynamic cyclical verification cutting method was used to ensure that the cutting point and its nearest bending point met a safety threshold. SL This process continues until all lengths of the reinforcing bars have been cut. Finally, the original material plans are converted into plans for splicing bent reinforcing bars.

[0057] In a preferred embodiment of the present invention, the dynamic cyclic inspection cutting method specifically involves: firstly, starting from the initial point, cutting the first segment of raw material, prioritizing cutting the longer segments; if the cutting is ineffective, then sequentially shortening the length of the raw material to be cut; assuming the first cutting point... lc 1= Secondly, compare the safe distance between the cutting point and its nearest bending point, assuming the distance from the cutting point... lc 1. The nearest bending point is lb 2. If the distance between the cutting point and the bending point meets the safety threshold, if If the cutting of this section of raw material is effective, then the cutting point of the previous section of raw material is used as the starting point to start cutting the next section of raw material, repeating the cutting process multiple times until the entire length of the rebar is cut; if the distance between the cutting point and the bending point does not meet the safety threshold, if If cutting this raw material is invalid, then determine if the length of this segment of raw material is the shortest. If the length of the raw material in this cut is the shortest, then discard this cutting plan. The length of the raw material for this cut will be selected based on the minimum waste per cycle. That is, the cutting point is located at a point less than the safety threshold of the bending point, such as... Figure 5 As shown in (a), the next section of raw material is cut starting from the previous section's cutting point, and this process is repeated multiple times until the entire length of the rebar is cut. The final section of raw material is cut according to the minimum waste per cycle, as shown in (a). Figure 5 As shown in (b).

[0058] In a preferred embodiment of the present invention, such as Figure 5 As shown, the minimum waste scheme for a single cycle is as follows: If the current cutting is not the last piece of material, calculate the difference between the remaining steel bar length and the length of different materials, and select the material with the smallest difference; if it is not the last piece of material, calculate the difference between the distance between the cutting points and the safety threshold of the bending point for different material lengths, and select the material with the smallest difference.

[0059] Example 1

[0060] One hundred different lengths of ideal straight steel bars, ranging from 57.4 meters to 9 meters, were tested and verified. Under the premise of meeting conditions such as staggered joints and safety thresholds, using 6-meter, 9-meter, and 13-meter steel bars as raw materials, the average waste rate of the steel bars after forming the final splicing scheme through the dynamic cyclic rapid splicing method of the present invention was 1.7535%, and the waste rate was always kept below 2%.

[0061] Comparative Example 1

[0062] Traditional splicing methods rely on the bill of quantities provided by designers and the engineering experience of on-site construction personnel, lacking comprehensive procurement planning. Typically, one or two types of raw materials are used for splicing, and the same case is used for testing and verification. After finalizing the splicing scheme, the average scrap rate of the reinforcing bars is 6.3625%, consistently remaining above 5%.

[0063] Therefore, through comparison, it can be seen that the dynamic cyclic rapid splicing method for reinforcing bars of the present invention has a significantly lower average waste rate than existing splicing methods. Based on a single project requiring 1930 tons of reinforcing bars, and assuming an average price of 5000 yuan / ton for ordinary reinforcing bars, a 3% reduction in waste would save 289,500 yuan for that single project alone, demonstrating significant economic benefits.

[0064] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for dynamic circulation and rapid splicing of steel bars, characterized in that, Includes the following steps: S1. Cut steel bars of different lengths; S2. Directly splice the unbent steel reinforcement materials; S3. Splice the bent steel bars together; In step S3, the method for splicing bent reinforcing bars includes the following steps: S301. Convert 50% of the bent reinforcing bars to ideal straight bars, starting from the leftmost point; convert 50% of the bent reinforcing bars to ideal straight bars, starting from the rightmost point; total length of bent reinforcing bars. L The bent steel bars are transformed into ideal straight bars. Assuming the initial point "0" is the leftmost point, the bending points are marked sequentially as follows: lb 1, lb 2, lb 3, lb 4, and 0 < lb 1< lb 2< lb 3< lb 4< L； S302. Start cutting from the initial point, with the cutting points as follows: lc 1, lc 2, lc 3, and 0 < lc 1< lc 2< lc 3< L； S303, adopt dynamic cycle inspection cutting method, make the cutting point and the nearest bending point meet the safety threshold SL , until the steel bar is cut to all lengths; S304. Convert the cut steel bar raw material into a scheme with bent steel bar splicing; Maintain a safe distance between the cutting point and the bending point of the reinforcing bar with a bend; The safe distance between the cutting point and the bending point of the bent steel bar shall not be less than a safety threshold of 50cm. In step S303, the dynamic cyclic inspection cutting method includes the following steps: S303a. Start cutting the first section of steel bar material from the initial point, prioritizing the cutting of longer steel bar material. If cutting is ineffective, shorten the length of the steel bar material to be cut in sequence. S303b, Compare the cutting point with the safe distance from its nearest bending point; S303c: If the distance between the cutting point and the bending point meets the safety threshold, the cutting of this section of steel reinforcement material is valid, and S303f shall be executed. S303d: If the distance between the cutting point and the bending point does not meet the safety threshold, the cutting of this raw material is invalid, and S303e is executed. S303e: If the length of the steel bar material in this section is the shortest, then the current cutting plan is discarded. The length of the steel bar material to be cut is selected according to the minimum waste in a single cycle. At this time, the cutting point is located at a position less than the safety threshold of the bending point. Then, S303f is executed. S303f: Using the cutting point of the previous section of steel bar material as the starting point, start cutting the next section of steel bar material. Repeat S303a ~ S303f until all lengths of steel bar material are cut. The last section of steel bar material is cut according to the minimum waste scheme for a single cycle. In step S303f, the minimum waste solution for a single cycle includes the following steps: S303f-1: If it is the last section of steel bar material to be cut, calculate the difference between the remaining steel bar length and the length of different materials, and select the material with the smallest difference; otherwise, execute S303f-2. S303f-2: Calculate the difference between the distance between the cutting points and the safety threshold of the bending point for different lengths of steel reinforcement materials, and select the steel reinforcement material with the smallest difference.

2. The method of claim 1, wherein, In step S1, the method for cutting steel bars of different lengths includes the following steps: S101, the length is L The steel reinforcement raw material is cut into l 1. l 2. l For steel bar raw materials of length 3, the longer raw materials are cut first. When the remaining length does not reach the shortest raw material length, it is considered to be the shortest steel bar raw material length. S102、Cut the steel bar raw material with a length of L into different quantities of steel bar raw materials, i.e. the required steel bar raw material quantity for splicing combination.

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