Prestress positioning mesh long rib automatic feeding device and feeding method

Abstract

The invention relates to the technical field of steel bar feeding, in particular to an automatic feeding device and method for prestressed positioning mesh long ribs, and the method comprises the following steps: cutting a steel bar into a plurality of web long ribs and bottom plate long ribs according to a preset size, and then conveying the web long ribs and the bottom plate long ribs to a long rib conveying line; correlation sensors are arranged on the two sides of the long rib conveying line, and the actual length of the long rib is calculated according to the shielding time between the correlation sensors; according to the actual length, the control system controls the jacking device to convey the long ribs to the corresponding web long rib transfer chain or the corresponding bottom plate long rib transfer chain; the web long ribs and the bottom plate long ribs are conveyed to the welding tray; the feeding gantry grabs web long ribs or bottom plate long ribs and places the web long ribs or the bottom plate long ribs to the corresponding positions of the welding tray. The correlation sensors are arranged on the long rib conveying line, whether the length of the reinforcing steel bars meets the requirement or not is detected by combining the blocking time of the correlation sensors, graded conveying is conducted, the situation that the reinforcing steel bars are blocked or deviated due to conveying and follow-up procedures are affected is avoided, and the whole process is high in automation degree and good in safety.

Description

Technical Field

[0001] The invention relates to the field of steel bar feeding, and in particular to an automatic feeding device and a feeding method for long steel bars of a prestressed positioning mesh. Background Art

[0002] Prefabricated box girder positioning steel mesh is an auxiliary measure for prestressed construction. It controls the linear shape of the prestressed pipe. Its construction accuracy has an important impact on the quality and stress characteristics of railway prefabricated box girders. Prefabricated box girder positioning steel mesh is a prestressed positioning mesh used as an auxiliary for the positioning and installation of prestressed tendons in railway box girders. It plays a vital role in the installation position, installation linearity and quality of prefabricated box girders.

[0003] The prefabricated box girder positioning steel mesh is made of long bars, short bars, and medium-long bars spliced ​​into a tic-tac-toe shape and then welded; the long bars include the bottom plate long bars and the web plate long bars, and the bottom plate long bars and the web plate long bars have different lengths. Therefore, during the loading and transportation, the bottom plate long bars and the web plate long bars need to be loaded separately. The existing prefabricated box girder positioning steel mesh production line generally sets up multiple conveyors separately, uses limit plates to limit the long bars, and then manually or by equipment to place the steel bars on a special mold, and then welds the intersection of the steel bars. There is a lack of detection means for the length of the steel bars after cutting. If the length of the steel bars does not match, it is easy to hinder the transportation of the production line, delay the progress of subsequent processes, and have low efficiency.

[0004] Therefore, there is an urgent need for an automatic feeding device and method for long reinforcing bars of a prestressed positioning mesh. Summary of the invention In order to avoid the above problems existing in the prior art, the purpose of the present invention is to provide an automatic feeding device and feeding method for long bars of prestressed positioning mesh, which can automatically distinguish and feed the long bars of the bottom plate and the long bars of the web.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for automatically feeding long reinforcing bars of a prestressed positioning mesh, comprising the following steps: S1: The straightening and cutting machine cuts the steel bars into several web long bars and bottom plate long bars according to the preset size and then transports them to the long bar conveying line; S2: Both sides of the long rib conveyor line are provided with opposing beam sensors, and the actual length of the long rib is calculated by the shielding time between the opposing beam sensors; S3: According to the length of the long reinforcement, the control system controls the lifting device to transport the long reinforcement to the corresponding web long reinforcement transfer chain or bottom plate long reinforcement transfer chain; S4: The web long reinforcement transfer chain and the bottom plate long reinforcement transfer chain transport the web long reinforcement and the bottom plate long reinforcement to the welding pallet respectively; S5: The loading gantry grabs the long web reinforcement or the long bottom reinforcement and places it at the corresponding position of the welding tray.

[0006] The present invention is further configured that, in step S2, the actual length of the long reinforcement is calculated by the following formula: ; Among them, L is the actual length of the steel bar, v is the conveying speed of the long steel bar conveyor line, and t is the time when the through-beam sensor is blocked.

[0007] The present invention is further configured that step S3 specifically includes: assuming that the length of the web long reinforcement is L1, the length of the bottom plate long reinforcement is L2, and L1<L2; If L=L1, the control system waits for T1 time, then controls the lifting device to lift up and transport the long reinforcement to the web long reinforcement transfer chain; If L=L2, the control system waits for T2 time, then controls the lifting device to lift up and transport the long reinforcement to the bottom plate long reinforcement transfer chain; If L<L1 or L1<L<L2, the lifting device will not start, and the long reinforcement will be transported to the waste storage area along the long reinforcement conveying line; If L>L2, the long rib conveyor line will be stopped for inspection.

[0008] The present invention is further configured that the T1 is calculated by the following formula: ; The T2 is calculated by the following formula: ; Wherein, v is the conveying speed of the long reinforcement conveyor line, m1 is the distance from the through-beam sensor to the web long reinforcement transfer chain, and m2 is the distance from the through-beam sensor to the bottom plate long reinforcement transfer chain.

[0009] The present invention also relates to an automatic feeding device for long reinforcing bars of a prestressed positioning mesh, comprising a straightening and cutting machine, a long reinforcing bar conveying line, a web long reinforcing bar transfer chain, a bottom plate long reinforcing bar transfer chain and a lifting device; The long rib conveyor line is arranged at the exit of the straightening and cutting machine, and a through-beam sensor is arranged on the long rib conveyor line; the web long rib transfer chain and the bottom plate long rib transfer chain are arranged on the left and right sides of the long rib conveyor line respectively, and the transport directions of the web long rib transfer chain and the bottom plate long rib transfer chain are perpendicular to the transport direction of the long rib conveyor line, and the lifting device is arranged below the long rib conveyor line.

[0010] The present invention is further configured such that the long rib conveyor line comprises a plurality of transmission wheels, the transmission wheels are arranged at preset intervals along the conveying direction of the long rib conveyor line, and the corresponding sensors and the lifting devices are sequentially arranged along the conveying direction of the long rib conveyor line; The through-beam sensor is arranged at a spaced position between the transmission wheels.

[0011] The present invention is further configured such that the lifting device includes a first lifting device and a second lifting device, the first lifting device includes a plurality of first lifting blocks, and the second lifting device includes a plurality of second lifting blocks; the first lifting blocks and the second lifting blocks are alternately distributed below the long rib conveying line.

[0012] The present invention is further configured such that the first lifting block includes a first lifting surface, the top end of which is located on the right side of the long rib conveying line; the second lifting block includes a second lifting surface, the top end of which is located on the left side of the long rib conveying line; and limiting blocks are provided on the tops of the first lifting surface and the second lifting surface.

[0013] The present invention is further configured such that a waste storage area is provided at the end point of the long rib conveying line.

[0014] The present invention is further configured such that the automatic feeding device for the long reinforcement of the prestressed positioning mesh also includes a feeding gantry and a welding pallet, and the feeding gantry is respectively arranged at the transfer chain of the web long reinforcement and the transfer chain of the bottom plate long reinforcement; a feeding robot is arranged on the feeding gantry for grabbing the long reinforcement and transporting it to the corresponding position of the welding pallet.

[0015] In summary, the beneficial effects of the above technical solution of the present invention are as follows: The present invention sets a beam sensor on the long reinforcement conveying line, and detects whether the length of the reinforcement meets the requirements in combination with the time when the beam sensor is blocked, and then transports the reinforcement in different levels; the reinforcements that are shorter than the required length are transported to the waste storage area, and those that meet the requirements are divided into web reinforcements and bottom reinforcements according to their lengths, and transported to the transfer chain to wait for subsequent material distribution and welding; to avoid calculation errors caused by too tight spacing between reinforcements, if the calculated length is greater than the preset value, the machine is stopped for detection to avoid reinforcement blockage or deviation caused by transportation, which affects subsequent processes. The overall process has a high degree of automation and good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 This is a flow chart of the automatic feeding method for long reinforcement of prestressed positioning mesh.

[0018] Figure 2 This is a schematic diagram of the structure of the automatic feeding device for long reinforcement of prestressed positioning mesh.

[0019] Figure 3 It is a schematic diagram of the coordination between the jacking device and the web long reinforcement transfer chain and the bottom plate long reinforcement transfer chain.

[0020] Figure 4 for Figure 3 Schematic diagram of AA in the middle.

[0021] In the accompanying drawings, the meanings of the symbols are as follows: 100. Straightening and cutting machine, 200. Long rib conveyor line, 210. Driving wheel, 300. Through-shooting sensor, 400. Lifting device, 410. First lifting device, 420. Second lifting device, 430. Limiting block, 500. Waste storage area, 600. Bottom plate long rib transfer chain, 700. Web plate long rib transfer chain. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in the field without making any creative work should all fall within the scope of protection of the present invention.

[0023] In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0025] Embodiment 1: like Figure 1 As shown in the figure, a preferred embodiment of the present invention is a method for automatically feeding long reinforcing bars of a prestressed positioning mesh, comprising the following steps: S1: The straightening and cutting machine cuts the steel bars into several web long bars and bottom plate long bars according to the preset size and then transports them to the long bar conveying line; S2: The two sides of the long rib conveyor line are provided with a beam sensor, and the actual length of the long rib is calculated by the shielding time between the beam sensors; the actual length of the long rib is calculated by the following formula: ; Among them, L is the actual length of the steel bar, v is the conveying speed of the long steel bar conveyor line, and t is the time when the beam sensor is blocked; S3: According to the length of the long reinforcement, the control system controls the lifting device to transport the long reinforcement to the corresponding web long reinforcement transfer chain or bottom plate long reinforcement transfer chain; Assume that the length of the web long reinforcement is L1, the length of the bottom plate long reinforcement is L2, and L1<L2; If L=L1, the control system waits for T1 time, then controls the lifting device to lift up and transport the long reinforcement to the web long reinforcement transfer chain; ; If L=L2, the control system waits for T2 time, then controls the lifting device to lift up and transport the long reinforcement to the bottom plate long reinforcement transfer chain; ; Among them, v is the conveying speed of the long reinforcement conveyor line, m1 is the distance from the through-beam sensor to the web long reinforcement transfer chain, and m2 is the distance from the through-beam sensor to the bottom plate long reinforcement transfer chain; If L<L1 or L1<L<L2, the lifting device will not start, and the long reinforcement will be transported to the waste storage area along the long reinforcement conveying line; If L>L2, the long rib conveyor line will be stopped for inspection; S4: The web long reinforcement transfer chain and the bottom plate long reinforcement transfer chain transport the web long reinforcement and the bottom plate long reinforcement to the welding pallet respectively; S5: The loading gantry grabs the long web reinforcement or the long bottom reinforcement and places it at the corresponding position of the welding tray.

[0026] Embodiment 2: like Figure 2-Figure 4 As shown, the present invention also relates to an automatic feeding device for long tendons of prestressed positioning mesh, which is applicable to the automatic feeding method for long tendons of prestressed positioning mesh described in Example 1, comprising a straightening and cutting machine 100, a long tendon conveying line 200, a web long tendon transfer chain 700, a bottom plate long tendon transfer chain 600 and a lifting device 400; The long rib conveyor line 200 is arranged at the exit of the straightening and cutting machine 100, and a shooting sensor 300 is arranged on the long rib conveyor line 200; the web long rib transfer chain 700 and the bottom plate long rib transfer chain 600 are respectively arranged on the left and right sides of the long rib conveyor line 200, and the transport directions of the web long rib transfer chain 700 and the bottom plate long rib transfer chain 600 are perpendicular to the transport direction of the long rib conveyor line 200, and the lifting device 400 is arranged below the long rib conveyor line 200.

[0027] The long rib conveyor line 200 includes a plurality of transmission wheels 210 , which are arranged at preset intervals along the transport direction of the long rib conveyor line 200 , and the corresponding radiation sensors 300 and the lifting devices 400 are arranged in sequence along the transport direction of the long rib conveyor line 200 ; the corresponding radiation sensors 300 are arranged at intervals between the transmission wheels 210 .

[0028] The lifting device 400 includes a first lifting device 410 and a second lifting device 420. The first lifting device 410 includes a plurality of first lifting blocks, and the second lifting device 420 includes a plurality of second lifting blocks. The first lifting blocks and the second lifting blocks are alternately distributed below the long rib conveying line 200.

[0029] The first lifting block includes a first lifting surface, and the top end of the first lifting surface is located on the right side of the long rib conveying line 200; the second lifting block includes a second lifting surface, and the top end of the second lifting surface is located on the left side of the long rib conveying line 200; the tops of the first lifting surface and the second lifting surface are both provided with limit blocks 430.

[0030] A waste storage area 500 is provided at the end of the long rib conveying line 200 .

[0031] During actual operation, the length of the steel bars is calculated in combination with the shielding time of the through-beam sensor, and the steel bars that are shorter than the required length are transported to the waste storage area 500. The steel bars that meet the requirements are divided into web long bars and bottom plate long bars according to their lengths and transported to the transfer chain to wait for subsequent material laying and welding. To avoid calculation errors caused by too tight spacing between steel bars, if the calculated length is greater than the preset value, the machine is stopped for detection to avoid congestion or displacement of the steel bars due to transportation, which would affect subsequent processes.

[0032] The automatic feeding device for long reinforcement of prestressed positioning mesh also includes a feeding gantry and a welding pallet. The feeding gantry is respectively provided at the web long reinforcement transfer chain 700 and the bottom plate long reinforcement transfer chain 600; the feeding gantry is provided with a feeding robot for grabbing the long reinforcement and transporting it to the corresponding position of the welding pallet.

[0033] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for automatically feeding long reinforcement bars of prestressed positioning mesh, characterized in that: The following steps are involved: S1: The straightening and cutting machine cuts the steel bars into several web long bars and bottom plate long bars according to the preset size and then transports them to the long bar conveying line; S2: Both sides of the long rib conveyor line are provided with opposing beam sensors, and the actual length of the long rib is calculated by the shielding time between the opposing beam sensors; S3: According to the length of the long reinforcement, the control system controls the lifting device to transport the long reinforcement to the corresponding web long reinforcement transfer chain or bottom plate long reinforcement transfer chain; S4: The web long reinforcement transfer chain and the bottom plate long reinforcement transfer chain transport the web long reinforcement and the bottom plate long reinforcement to the welding pallet respectively; S5: The loading gantry grabs the long web reinforcement or the long bottom reinforcement and places it at the corresponding position of the welding tray.

2. The method for automatically feeding long reinforcing bars of a prestressed positioning mesh according to claim 1 is characterized in that: In step S2, the actual length of the long reinforcement is calculated by the following formula: ； Among them, L is the actual length of the steel bar, v is the conveying speed of the long steel bar conveyor line, and t is the time when the through-beam sensor is blocked.

3. The method for automatically feeding long reinforcing bars of a prestressed positioning mesh according to claim 2 is characterized in that: Step S3 specifically includes: assuming that the length of the web long reinforcement is L1, the length of the bottom plate long reinforcement is L2, and L1<L2; If L=L1, the control system waits for T1 time, then controls the lifting device to lift up and transport the long reinforcement to the web long reinforcement transfer chain; If L=L2, the control system waits for T2 time, then controls the lifting device to lift up and transport the long reinforcement to the bottom plate long reinforcement transfer chain; If L<L1 or L1<L<L2, the lifting device will not start, and the long reinforcement will be transported to the waste storage area along the long reinforcement conveying line; If L>L2, the long rib conveyor line will be stopped for inspection.

4. The method for automatically feeding long reinforcing bars of a prestressed positioning mesh according to claim 3 is characterized in that: The T1 is calculated by the following formula: ； The T2 is calculated by the following formula: ； Among them, v is the conveying speed of the long reinforcement conveyor line, m1 is the distance from the through-beam sensor to the web long reinforcement transfer chain, and m2 is the distance from the through-beam sensor to the bottom plate long reinforcement transfer chain.

5. An automatic feeding device for long reinforcement of prestressed positioning mesh, used in conjunction with the automatic feeding method for long reinforcement of prestressed positioning mesh according to any one of claims 1 to 4, characterized in that: It includes a straightening and cutting machine, a long rib conveying line, a web long rib transfer chain, a bottom plate long rib transfer chain and a lifting device; The long rib conveyor line is arranged at the exit of the straightening and cutting machine, and shooting sensors are arranged on both sides of the long rib conveyor line; the web long rib transfer chain and the bottom plate long rib transfer chain are arranged on the left and right sides of the long rib conveyor line respectively, and the transport directions of the web long rib transfer chain and the bottom plate long rib transfer chain are perpendicular to the transport direction of the long rib conveyor line; the lifting device is arranged below the long rib conveyor line.

6. The automatic feeding device for long reinforcement of prestressed positioning mesh according to claim 5 is characterized in that: The long rib conveyor line comprises a plurality of transmission wheels, which are arranged at preset intervals along the conveying direction of the long rib conveyor line; the beam sensors and the lifting devices are arranged in sequence along the conveying direction of the long rib conveyor line; The through-beam sensor is arranged at a spaced position between the transmission wheels.

7. The automatic feeding device for long reinforcement of prestressed positioning mesh according to claim 6 is characterized in that: The lifting device includes a first lifting device and a second lifting device, the first lifting device includes a plurality of first lifting blocks, and the second lifting device includes a plurality of second lifting blocks; the first lifting blocks and the second lifting blocks are staggered and arranged below the long rib conveying line.

8. The automatic feeding device for long reinforcement of prestressed positioning mesh according to claim 7 is characterized in that: The first lifting block includes a first lifting surface, and the top end of the first lifting surface is located on the right side of the long rib conveying line; the second lifting block includes a second lifting surface, and the top end of the second lifting surface is located on the left side of the long rib conveying line; the tops of the first lifting surface and the second lifting surface are both provided with limit blocks.

9. The automatic feeding device for long reinforcement of prestressed positioning mesh according to claim 5 is characterized in that: A waste storage area is provided at the end point of the long rib conveying line.

10. The automatic feeding device for long reinforcement of prestressed positioning mesh according to claim 5, characterized in that: The automatic feeding device for long reinforcement of prestressed positioning mesh also includes a feeding gantry and a welding pallet. The feeding gantry is respectively arranged at the transfer chain of the web long reinforcement and the transfer chain of the bottom plate long reinforcement. A feeding robot is arranged on the feeding gantry for grabbing the long reinforcement and transporting it to the corresponding position of the welding pallet.

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