CN113477835A - Method for machining U-shaped ribs of railway prefabricated box girder - Google Patents

Abstract

The invention discloses a method for processing U-shaped ribs of a railway precast box girder, which can improve the automation degree of processing the U-shaped ribs of the railway precast box girder, wherein the method comprises the following steps: the bottom rib, the side ribs positioned at two sides of the bottom rib and the top ends of the side ribs are provided with top ribs; the top rib is parallel to the bottom rib and is bent inwards; the method for processing the U-shaped rib of the railway precast box girder comprises the following steps: moving the straight reinforcing steel bars to an alignment station one by one; moving the straight steel bars at the alignment station to a first steel bar bending station; bending two ends of the steel bar to form a top bar through two first bending machines at the first steel bar bending station; the first steel bar bending station is provided with two first bending machines which are spaced; the spacing distance between the two first bending machines is the length of the steel bar between the two top ribs; moving the reinforcing steel bars of the first reinforcing steel bar bending station to a second reinforcing steel bar bending station; and bending the reinforcing steel bars to form side bars at the second reinforcing steel bar bending station.

Description

Method for machining U-shaped ribs of railway prefabricated box girder

Technical Field

The invention relates to the technical field of railway precast box girder construction, in particular to a method for machining U-shaped ribs of a railway precast box girder.

Background

In the beginning of the 21 st century, the gold development period is met by the construction of high-speed railways such as Jingjin, Jinghu and Wuguang. The construction of the high-speed railway mainly takes a prestressed concrete simply-supported box girder bridge and a continuous box girder bridge as the main parts, and along with the rapid development and the improvement of the mechanization degree of a national railway system, the construction technology of the railway standard span simply-supported box girder bridge is mature day by day.

However, in the field of processing of U-shaped ribs of box beams, because the U-shaped ribs of prestressed concrete simply-supported box beams are large in size and large in deflection, and a single steel bar can be processed and formed by bending for 4 times, the conventional construction generally adopts a method that 2 workers respectively operate a steel bar bending machine to bend for two times, the processing precision in the process depends on the proficiency of the operators, and the steel bar bending machine is greatly influenced by external factors, so that the construction quality is difficult to ensure; meanwhile, workers need to carry the processed steel bars for many times in the process, so that the labor intensity is high, and the construction efficiency is low.

Disclosure of Invention

The invention aims to solve the problems of low machining precision, high machining labor intensity, low construction efficiency and the like of a U-shaped rib of a railway precast box girder in the prior art, and provides a method for machining the U-shaped rib of the railway precast box girder so as to improve the automation degree of machining the U-shaped rib of the railway precast box girder.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for processing U-shaped ribs of a railway precast box girder comprises the following steps: the bottom rib, the side ribs positioned at two sides of the bottom rib and the top ends of the side ribs are provided with top ribs; the top rib is parallel to the bottom rib and is bent inwards; the method for processing the U-shaped rib of the railway precast box girder comprises the following steps:

moving the straight reinforcing steel bars to an alignment station one by one; the alignment station is used for positioning the straight reinforcing steel bar at a central position;

moving the straight steel bars at the alignment station to a first steel bar bending station; bending two ends of the steel bar to form a top bar through two first bending machines at the first steel bar bending station; the first steel bar bending station is provided with two first bending machines which are spaced; the spacing distance between the two first bending machines is the length of the steel bar between the two top ribs;

moving the reinforcing steel bars of the first reinforcing steel bar bending station to a second reinforcing steel bar bending station; bending the steel bars to form side bars at the second steel bar bending station, and further forming U-shaped bars of the railway precast box girder; the first reinforcing steel bar bending station is provided with two second bending machines which are spaced; the spacing distance between the two second bending machines is the length of the steel bar of the bottom rib;

and moving the U-shaped rib of the railway precast box girder from the first reinforcing steel bar bending station to a finished product discharging station.

As a preferred embodiment, after the alignment station controls the alignment device to position the straight reinforcing steel bars, the straight reinforcing steel bars slide down onto two or more first supporting tables;

and controlling the first transfer mechanism to lift up and clamp the straight reinforcing steel bars, transferring and placing the straight reinforcing steel bars onto a first clamping mechanism and a second supporting table of a first reinforcing steel bar bending station, and resetting the first transfer mechanism to the alignment station.

As a preferred embodiment, a first transfer mechanism reciprocating between the alignment station and the first bar bending station moves the bar from the alignment station to a first clamping mechanism of the first bar bending station, and is supported by a second support table of the first bar bending station; the first clamping mechanism is arranged on the first bending machine and is operable to clamp and fix the steel bars;

the first bending machine bends the part of the reinforcing steel bar, except the clamping position of the first clamping mechanism, to form a top rib;

a second transfer mechanism which moves back and forth between the first reinforcing steel bar bending station and the second reinforcing steel bar bending station synchronously with the first transfer mechanism moves the reinforcing steel bars from the first reinforcing steel bar bending station to a second clamping mechanism of a second reinforcing steel bar bending station; the second clamping mechanism is arranged on the second bending machine and can be used for clamping and fixing the reinforcing steel bars in an operable mode;

bending the part of the steel bar, which is outside the clamping position of the second clamping mechanism, by the second bending machine to form a side rib so as to form a U-shaped rib of the railway precast box girder;

the first conveying mechanism synchronously moves the U-shaped steel bars of the prefabricated railway box girder from the second steel bar bending station to the finished product discharging station; the first adaptor is used for accommodating the bottom rib part of the U-shaped rib of the prefabricated box girder of the railway, and the second adaptor is used for accommodating the side rib part close to the top rib part of the U-shaped rib of the prefabricated box girder of the railway;

and controlling the first adaptor and the second adaptor to overturn to release the bearing of the U-shaped ribs of the railway precast box girder, so that the U-shaped ribs fall into a finished product placing area.

As a preferred embodiment, an auxiliary bracket is further provided, which is located on the same plane as the second adaptor in a bearing state; the second adaptor is positioned at the tail end of the auxiliary bracket;

when the second bending machine bends the reinforcing steel bars, the side reinforcing steel bars are borne on the auxiliary support and are bent to rotate to the second bearing device along the plane.

As a preferred embodiment, the aligning station, the first reinforcing steel bar bending station, the second reinforcing steel bar bending station and the finished product discharging station are arranged along an axial direction perpendicular to the direction of the bottom bar.

In a preferred embodiment, in the method for processing U-shaped reinforcement for precast railway box girders, the first bending machine and the second bending machine bend the reinforcement bar in front of the conveying direction.

As a preferred embodiment, a first middle clamping mechanism is further arranged at the middle position between the two first clamping mechanisms; and a second middle clamping mechanism is also arranged in the middle between the two second clamping mechanisms.

As a preferred embodiment, there are two or more second support tables arranged perpendicular to the axial direction between the two first clamping mechanisms; the number of the second supporting tables is less than that of the first supporting tables; a partial number of the first support tables and the second support tables are axially aligned one to one.

As a preferred embodiment, the first transfer mechanism includes three or more first transfer clamp assemblies in a direction perpendicular to the axial direction; the second transfer mechanism comprises three or more second transfer clamp assemblies along a direction perpendicular to the axial direction; the first transfer clamping assembly located on two outer sides perpendicular to the axial direction and the second transfer clamping assembly located on two outer sides perpendicular to the axial direction are arranged in an axial direction in an aligned mode and are close to the first bending machine.

As a preferred embodiment, the method further comprises the following steps:

shearing the straight steel bars according to a preset length and then conveying the straight steel bars to a chain type feeding device;

the chain type feeding device conveys the reinforcing steel bars to the stepping feeding device;

and the stepping feeding device conveys the reinforcing steel bars to an alignment station one by one.

The technical scheme of the invention has the following advantages:

the invention provides a rapid processing method of a U-shaped rib of a railway precast box girder, which adopts a complete set of construction method of automatic feeding, automatic alignment, automatic feeding, automatic bending and automatic blanking, improves the processing quality of the U-shaped rib, saves manual carrying procedures, reduces the labor intensity and greatly improves the construction efficiency.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a processing system for U-shaped bars of a prefabricated railway box girder according to an embodiment of the invention.

Fig. 2 is a schematic structural view of a U-shaped rib of the prefabricated railway box girder processed by the method shown in fig. 1.

Fig. 3 is a schematic structural view of a U-shaped rib of the prefabricated railway box girder processed in fig. 1.

Description of reference numerals: 1. a reinforcing steel bar arranging mechanism; 2. a first support table; 3. a first transfer clamp assembly; 4. a first clamping mechanism; 5. a second transfer clamp assembly; 5A, a side second transfer clamping component; 6. a second support table; 7. a second clamping mechanism; 8. a third transfer clamp assembly; 9. a first carrier; 10. receiving conveying rollers; 11. a second carrier; 12. an auxiliary support; 13. a finished U-shaped rib receiving vehicle; 14-1, a steel bar bender head (a first bender); 14-2, a steel bar bender head (a second bender); 14-3, a steel bar bender head (a second bender); 14-4, a steel bar bender head (a first bender);

500. u-shaped ribs; 501. a bottom rib; 502. side ribs; 503. jacking ribs; 100. a chain type feeding device; 200. a step-by-step feeding device; 300. a U-shaped rib machining device for the railway prefabricated box girder; f1, axial; f2, vertical direction.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, in one embodiment of the present invention, a method for processing U-shaped steel bars of a precast railway box girder is provided. The processing method can be realized by adopting a railway precast box girder U-shaped rib processing system. As shown in fig. 3, the U-shaped rib 500 of the precast railway box girder includes: the bottom rib 501, the side ribs 502 positioned at two sides of the bottom rib 501, and the top end of the side rib 502 is provided with a top rib 503. The top rib 503 is parallel to the bottom rib 501 and is bent inward. The side ribs 502 and the bottom rib 501 are arranged at an obtuse angle. The top rib 503 and the side rib 502 are disposed at an acute angle. A spaced opening is provided between the two spaced top ribs 503.

Specifically, as shown in fig. 1 and 2, the method for processing the U-shaped rib of the precast railway box girder comprises the following steps:

and S300, moving the straight reinforcing steel bars one by one to an alignment station. The alignment station is used for positioning the straight reinforcing steel bar at a central position;

s400, moving the straight reinforcing steel bars at the aligning station to a first reinforcing steel bar bending station. At the first steel bar bending station, two ends of the steel bar are bent by two first bending machines 14-1 to form a top bar 503; the first reinforcing steel bar bending station is provided with two first bending machines 14-1 which are spaced; the spacing distance between the two first bending machines 14-1 is the length of the steel bar between the two top bars 503;

s500, moving the reinforcing steel bars at the first reinforcing steel bar bending station to a second reinforcing steel bar bending station. Bending the steel bars to form side bars 502 at the second steel bar bending station, and further forming U-shaped bars of the railway precast box girder; the first reinforcing steel bar bending station is provided with two second bending machines 14-2 which are spaced; the spacing distance between the two second bending machines 14-2 is the length of the steel bar of the bottom bar 501;

s600, moving the U-shaped rib of the railway precast box girder from the first reinforcing steel bar bending station to a finished product discharging station.

In this embodiment, the method for processing the U-shaped rib of the prefabricated railway box girder further comprises the following steps:

s100, shearing the straight steel bars according to a preset length and conveying the straight steel bars to a chain type feeding device 100;

s200, conveying the steel bars to the stepping feeding device 200 by the chain type feeding device 100;

s300, the step feeding device 200 conveys the reinforcing steel bars to an alignment station one by one. Specifically, the step feeding device 200 feeds the reinforcing bars one by one between two alignment baffles of the alignment device of the alignment station. The two alignment stops are then moved synchronously toward the center to position the rebar in the centered position.

The step S300 includes the following substeps: s301, after the alignment station controls the alignment device to position the straight reinforcing steel bars, the straight reinforcing steel bars slide down to the two or more first supporting tables 2. S302, controlling a first transfer mechanism to lift up and clamp the straight reinforcing steel bars, transferring and placing the straight reinforcing steel bars onto a first clamping mechanism 4 and a second supporting table 6 of a first reinforcing steel bar bending station, and resetting the first transfer mechanism to the alignment station.

In step S400, the first transfer mechanism, which reciprocates between the alignment station and the first bar bending station, moves the bar from the alignment station to the first clamping mechanism 4 of the first bar bending station, and is supported by the second support base 6 of the first bar bending station. The first clamping mechanism 4 is disposed on the first bender 14-1 and is operable to clamp the rebar in place. The clamping end of the first transfer mechanism can move up and down. The first bending machine 14-1 bends the portion of the reinforcing bar other than the position clamped by the first clamping mechanism 4 to form the top rib 503.

In step S500, the second transfer mechanism, which moves back and forth between the first reinforcing bar bending station and the second reinforcing bar bending station in synchronization with the first transfer mechanism, moves the reinforcing bar from the first reinforcing bar bending station to the second clamping mechanism 7 of the second reinforcing bar bending station; the second clamping mechanism 7 is disposed on the second bender 14-2 and is operable to clamp the rebar in place. And the second bending machine 14-2 bends the part of the reinforcing steel bar outside the position clamped by the second clamping mechanism 7 to form a side rib 502, so as to form the U-shaped rib of the railway precast box girder.

The following substeps are included in step S600: s601, moving the U-shaped steel bars of the railway prefabricated box girder from the second steel bar bending station to the first turnover container 9 and the second turnover container 11 of the finished product discharging station by the third transfer mechanism which synchronously moves back and forth between the finished product discharging station and the second steel bar bending station and between the first transfer mechanism. And S602, controlling the first adaptor 9 and the second adaptor 11 to overturn to release the bearing of the U-shaped ribs of the prefabricated railway box girder, so that the prefabricated railway box girder falls into a finished product placing area. The first adaptor 9 is used for accommodating a bottom rib 501 of a U-shaped rib of the prefabricated box girder of the railway, and the second adaptor 11 is used for accommodating a side rib 502 of the U-shaped rib of the prefabricated box girder of the railway, which is close to a top rib 503.

The device 300 for processing the U-shaped rib of the railway precast box girder is also provided with an auxiliary bracket 12 which is positioned on the same plane with the second adaptor 11 in a bearing state. The second receptacle 11 is located at the end of the auxiliary support 12. When the second bending machine 14-2 bends the reinforcing steel bar, the side bar 502 is carried on the auxiliary bracket 12 and is bent and rotated to the second adaptor 11 along the plane.

In this embodiment, the alignment station, the first steel bar bending station, the second steel bar bending station and the finished product discharge station are arranged along an axial direction F1 perpendicular to the direction of the bottom bar 501. In the method for processing the U-shaped steel bar of the railway precast box girder, the first bending machine 14-1 and the second bending machine 14-2 bend the steel bar in front of the conveying direction.

A first middle clamping mechanism is further arranged in the middle between the two first clamping mechanisms 4. The first middle clamping mechanism is fixedly arranged on the rack and clamps and fixes the middle position of the steel bar. A second middle clamping mechanism is further arranged in the middle position between the two second clamping mechanisms 7. The second middle clamping mechanism is arranged on the frame and is aligned with the first middle clamping mechanism in the axial direction F1 to clamp and fix the middle position of the transferred reinforcing steel bar.

Between the two first clamping mechanisms 4 there are two or more second support stands 6 arranged perpendicularly to the axial direction F1. Through the second brace table 6 support bar, avoid the reinforcing bar to produce the bending because of weight, lead to bending the product precision that forms to reduce. The number of second support tables 6 is less than the number of first support tables 2. A partial number of first support tables 2 and said second support tables 6 are aligned one to one in the axial direction F1.

The first transfer mechanism comprises three or more first transfer clamp assemblies 3 arranged in a direction perpendicular to the axial direction F1. Three or more first transfer clamp assemblies 3 are arranged in the vertical direction F2. The second transfer mechanism includes three or more second transfer clamp assemblies 5 arranged in a direction perpendicular to the axial direction F1. Three or more second transfer clamp assemblies 5 are arranged in the vertical direction F2. The third transfer mechanism includes three or more third transfer clamp assemblies 8 arranged in a direction perpendicular to the axial direction F1. Wherein the two outer first transfer clamp assemblies 3, which are perpendicular to the axial direction F1, and the two outer second transfer clamp assemblies 5, which are perpendicular to the axial direction F1, are arranged in alignment in the axial direction F1 and adjacent to the first bending machine 14-1. The transfer clamping assembly 3 has a clamping end (clamping head) which can move up and down, and the steel bar is clamped, taken and placed by moving up and down.

The U-shaped rib machining system for the railway precast box girder is provided with a U-shaped rib machining device for the railway precast box girder. The U-shaped rib processing device for the railway precast box girder comprises two first bending machines (14-1, 14-4) and two second bending machines (14-2, 14-3). Wherein, the two first bending machines are respectively a steel bar bending machine head 14-1 and a steel bar bending machine head 14-4. The reinforcing steel bar arranging mechanism 1 is installed on one axial side of the reinforcing steel bar bending machine head 14-1 and one axial side of the reinforcing steel bar bending machine head 14-4 and can move along with the movement of a bending main machine (the reinforcing steel bar bending machine head is arranged on the bending main machine, and the bending main machine is provided with a power motor for driving the reinforcing steel bar bending machine head). Four groups of arrangement mechanisms 2 are uniformly distributed and installed on the rack. The two second bending machines are respectively a steel bar bending machine head 14-2 and a steel bar bending machine head 14-3. The railway precast box girder U-shaped rib machining system can also be provided with

The first transferring and clamping assembly 3 can transfer the reinforcing steel bars to the next station, and the driving power source of the first transferring and clamping assembly 3 is 4 motors which respectively drive the 4 first transferring and clamping assemblies 3 in a one-to-one correspondence manner. The two first middle clamping mechanisms 4 are respectively arranged on one side (inner side) of the main machine of the steel bar bender head 14-1 and the steel bar bender head 14-4 corresponding to the central axis. A first intermediate clamping mechanism 4 is mounted on the support of the intermediate clamping mechanism. The reinforcing steel bar clamping mechanism clamps the reinforcing steel bar when the reinforcing steel bar is bent, and the reinforcing steel bar clamped between the reinforcing steel bar clamping mechanisms is prevented from moving.

The power source of the second transfer mechanism is a 1.5KW servo motor. The second transferring and clamping assembly 5 is respectively arranged on the support of the steel bar bender head 14-2, the steel bar bender head 14-3 and the middle clamping mechanism and is used for transferring the steel bars. The second transferring and clamping assembly 5A is arranged on the supports of the steel bar bender head 14-1 and the steel bar bender head 14-4, the position of the clamping jaw of the second transferring and clamping assembly 5A can be adjusted, and the distance between the adjusting range and the center of the clamping jaw of the first transferring and clamping assembly 3 is 800mm-900 mm. The second support platform 6 is arranged on the frame and used for bearing the reinforcing steel bars.

The two second clamping mechanisms 7 are respectively arranged on one sides of the steel bar bender heads 14-2 and 14-3 corresponding to the central axis A-A. An intermediate clamping mechanism 7 is mounted on the intermediate support. The second clamping mechanism 7 and the middle clamping mechanism 7 clamp the steel bar when the steel bar is bent, the position of a steel bar clamping jaw of the second clamping mechanism 7 can be adjusted, and the adjusting range is 780mm-900mm away from the center of the clamping jaw of the second transferring and clamping assembly 5.

The third shifting clamp assembly 8 is used for shifting the reinforcing steel bars. The third transferring and clamping assembly 8 is respectively arranged on the support of the steel bar bender head 14-2, the steel bar bender head 14-3 and the middle clamping mechanism. The position of the clamping jaw of the third transferring and clamping assembly 8 can be adjusted by an air cylinder, and the adjusting range is 780mm-900mm away from the center of the clamping jaw of the second transferring and clamping assembly 5.

The reinforcing steel bar receiving and blanking mechanism 9 is mainly used for receiving a U-shaped reinforcing steel bar which is bent and formed, and then the U-shaped reinforcing steel bar falls onto a finished product receiving vehicle. And the material receiving conveying roller 10 is mainly used for receiving a finished product clamped and lifted by the third transferring and clamping assembly 8 and assisting the third transferring and clamping assembly 8 to drop the finished reinforcing steel bar onto the reinforcing steel bar material receiving and blanking mechanism 9 (a first receiver) and the reinforcing steel bar material receiving and blanking support 11 (a second receiver). The reinforcing steel bar receiving and blanking mechanism 9 may include two L-shaped turning supports, and the receiving state and the unloading state are switched by turning (for example, rotating). The reinforcing steel bar receiving and blanking support 11 can be a flat plate type support, and switching between a flat plate tiling receiving state and a vertical unloading state is realized through overturning (for example, rotating). The reinforcing steel bar receiving and blanking support 9 (first adapter) is used for receiving and blanking a bent finished U-shaped reinforcing steel bar. And the U-shaped rib finished product receiving trolley 13 is used for collecting the bent finished steel bars accumulated in the finished product discharge area. The U-shaped rib processing system for the railway precast box girder is also provided with an auxiliary bent U-shaped rib bracket for assisting the steel bar bending machine head 14-2 and the steel bar bending machine head 14-3 in bending steel bars.

In this embodiment, the method for processing U-shaped steel bars of precast railway box girders according to the present invention will be described in detail through working steps in one embodiment, so as to better understand the present invention.

1. Shearing and conveying the steel bars, and turning the sheared steel bars onto a chain type feeding device; the chain type feeding device is provided with a chain type transmission mechanism.

2. The chain type feeding device conveys the conveyed reinforcing steel bars to the stepping feeding device through a chain type transmission mechanism.

3. The stepping feeding device feeds the reinforcing steel bars conveyed by the chain type feeding device into a feeding port of the aligning device one by one.

4. And an alignment plate A, B in the alignment device aligns the two ends of the steel bar by taking A-A (A-A is the central axis of the U-shaped bar processing device of the railway precast box girder) as a central line. Wherein, the power source of the aligning plate is a 0.75KW servo motor, and the stroke range of the two aligning plates is 7400 mm-12400 mm.

5. The aligned steel bars are slid into the jaws of the steel bar arranging mechanisms 1 and 2 by the aligning device; wherein, the jaw of reinforcing bar arrangement mechanism 1, 2 can carry out the resize according to the difference of reinforcing bar diameter.

6. The first transferring and clamping assembly 3 lifts and clamps the reinforcing steel bars, transfers the reinforcing steel bars to the working positions of the reinforcing steel bar bender head 14-1 and the reinforcing steel bar bender head 14-4, and falls back to the initial position, and the distance for transferring the reinforcing steel bars is 900 mm. The rebar is now located within the jaws of the first intermediate clamping mechanism 4 and the second support table 6.

7. The first middle clamping mechanisms 4 corresponding to the steel bar bender heads 14-1 and 14-4 clamp the steel bars, and the steel bar bender heads 14-1 and 14-4 work to bend the steel bars.

8. And lifting and clamping the reinforcing steel bars after the machine heads are bent by 14-1 and 14-4 through the second transferring and clamping assembly 5 and the side second transferring and clamping assembly 5A, transferring the reinforcing steel bars to the stations of the reinforcing steel bar bending machine head 14-2 and the reinforcing steel bar bending machine head 14-3, and dropping the reinforcing steel bars to the initial positions. The second transfer clamping assembly 5 controls the steel bars to be sent to a proper position through a servo motor, and the second transfer clamping assembly 5A adjusts the steel bars to be sent to the proper position through an air cylinder. The bar is now located in the bar clamping jaw of the second intermediate clamping mechanism 7.

9. The steel bar bending machine head 14-2, the second clamping mechanism 7 and the second middle clamping mechanism 7 corresponding to the steel bar bending machine head 14-3 clamp the steel bars, the steel bar bending machine head 14-2 and the steel bar bending machine head 14-3 work to bend the steel bars, and the U-shaped bar auxiliary support 12 assists the steel bar bending machine head 14-2 and the steel bar bending machine head 14-3 to complete bending of the U-shaped bars. During the bending process, the side rib portions move along the U-shaped rib auxiliary bracket 12. Before the side rib is bent and moved to the material receiving conveying roller 10, the material receiving conveying roller 10 topples over the previous U-shaped rib, the U-shaped rib is rapidly turned over and reset to a supporting state, and the side rib keeps moving until the side rib reaches the material receiving conveying roller 10 and is supported by the material receiving conveying roller 10.

10. After the steel bar bending machine head 14-2 and the steel bar bending machine head 14-3 bend the steel bar, the third transferring and clamping assembly 8 lifts and clamps the steel bar, at this time, the material receiving conveying roller 10 is turned over and lifted to support the side bar, and the third transferring and clamping assembly 8 transfers the steel bar to the position above the steel bar material receiving and blanking turning support 9.

11. The third transferring and clamping assembly 8 and the material receiving conveying roller 10 fall down, the steel bars fall on the surfaces of the serial number 9 and the serial number 11, and the steel bars of the serial number 9 and the material receiving conveying roller 10 fall into a U-shaped clamping groove of a finished product material receiving vehicle 13 through cylinder control;

11. after the finished product material receiving vehicle 13 is filled with the steel bars in the U-shaped clamping grooves, the finished product material receiving vehicle is manually pulled away from one side for transferring.

12. And repeating the steps of 4-11 to process the U-shaped rib of the prefabricated box girder of the next railway.

Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims (10)

1. A method for processing U-shaped ribs of a railway precast box girder comprises the following steps: the bottom rib, the side ribs positioned at two sides of the bottom rib and the top ends of the side ribs are provided with top ribs; the top rib is parallel to the bottom rib and is bent inwards; the method for processing the U-shaped rib of the railway precast box girder comprises the following steps:

moving the straight reinforcing steel bars to an alignment station one by one; the alignment station is used for positioning the straight reinforcing steel bar at a central position;

moving the straight steel bars at the alignment station to a first steel bar bending station; bending two ends of the steel bar to form a top bar through two first bending machines at the first steel bar bending station; the first steel bar bending station is provided with two first bending machines which are spaced; the spacing distance between the two first bending machines is the length of the steel bar between the two top ribs;

moving the reinforcing steel bars of the first reinforcing steel bar bending station to a second reinforcing steel bar bending station; bending the steel bars to form side bars at the second steel bar bending station, and further forming U-shaped bars of the railway precast box girder; the first reinforcing steel bar bending station is provided with two second bending machines which are spaced; the spacing distance between the two second bending machines is the length of the steel bar of the bottom rib;

and moving the U-shaped rib of the railway precast box girder from the first reinforcing steel bar bending station to a finished product discharging station.

2. The method for processing U-shaped bars of railway precast box girders according to claim 1, wherein the straight steel bars are slid onto two or more first supporting tables after the alignment station controls the alignment device to position the straight steel bars;

and controlling the first transfer mechanism to lift up and clamp the straight reinforcing steel bars, transferring and placing the straight reinforcing steel bars onto a first clamping mechanism and a second supporting table of a first reinforcing steel bar bending station, and resetting the first transfer mechanism to the alignment station.

3. The method for processing U-shaped ribs of railway precast box girders according to claim 1 or 2,

the first transfer mechanism which moves back and forth between the alignment station and the first steel bar bending station moves the steel bars from the alignment station to the first clamping mechanism of the first steel bar bending station and is supported by the second support platform of the first steel bar bending station; the first clamping mechanism is arranged on the first bending machine and is operable to clamp and fix the steel bars;

the first bending machine bends the part of the reinforcing steel bar, except the clamping position of the first clamping mechanism, to form a top rib;

a second transfer mechanism which moves back and forth between the first reinforcing steel bar bending station and the second reinforcing steel bar bending station synchronously with the first transfer mechanism moves the reinforcing steel bars from the first reinforcing steel bar bending station to a second clamping mechanism of a second reinforcing steel bar bending station; the second clamping mechanism is arranged on the second bending machine and can be used for clamping and fixing the reinforcing steel bars in an operable mode;

bending the part of the steel bar, which is outside the clamping position of the second clamping mechanism, by the second bending machine to form a side rib so as to form a U-shaped rib of the railway precast box girder;

the first conveying mechanism synchronously moves the U-shaped steel bars of the prefabricated railway box girder from the second steel bar bending station to the finished product discharging station; the first adaptor is used for accommodating the bottom rib part of the U-shaped rib of the prefabricated box girder of the railway, and the second adaptor is used for accommodating the side rib part close to the top rib part of the U-shaped rib of the prefabricated box girder of the railway;

and controlling the first adaptor and the second adaptor to overturn to release the bearing of the U-shaped ribs of the railway precast box girder, so that the U-shaped ribs fall into a finished product placing area.

4. The method for processing the U-shaped rib of the railway precast box girder as recited in claim 3, wherein an auxiliary bracket is further provided, which is positioned on the same plane as the second adapter in a bearing state; the second adaptor is positioned at the tail end of the auxiliary bracket;

when the second bending machine bends the reinforcing steel bars, the side reinforcing steel bars are borne on the auxiliary support and are bent to rotate to the second bearing device along the plane.

5. The method for processing the U-shaped rib of the railway precast box girder as recited in claim 1, wherein the alignment station, the first reinforcing bar bending station, the second reinforcing bar bending station and the finished product discharging station are arranged along an axial direction perpendicular to the bottom rib direction.

6. The method for processing the U-shaped steel bar of the railway precast box girder of claim 5, wherein the first bending machine and the second bending machine bend the steel bar in front of the conveying direction in the method for processing the U-shaped steel bar of the railway precast box girder.

7. The method for processing the U-shaped rib of the railway precast box girder as recited in claim 3, wherein a first middle clamping mechanism is further arranged at a middle position between the two first clamping mechanisms; and a second middle clamping mechanism is also arranged in the middle between the two second clamping mechanisms.

8. A method for processing U-shaped bars of precast railway box girders according to claim 3, characterized in that two or more second support tables are arranged perpendicularly to the axial direction between two first clamping mechanisms; the number of the second supporting tables is less than that of the first supporting tables; a partial number of the first support tables and the second support tables are axially aligned one to one.

9. The method for processing U-shaped ribs of railway precast box girders according to claim 3, wherein the first transfer mechanism comprises three or more first transfer clamping assemblies in a direction perpendicular to the axial direction; the second transfer mechanism comprises three or more second transfer clamp assemblies along a direction perpendicular to the axial direction; the first transfer clamping assembly located on two outer sides perpendicular to the axial direction and the second transfer clamping assembly located on two outer sides perpendicular to the axial direction are arranged in an axial direction in an aligned mode and are close to the first bending machine.

10. The method for processing the U-shaped rib of the railway precast box girder of claim 1, further comprising the following steps of:

shearing the straight steel bars according to a preset length and then conveying the straight steel bars to a chain type feeding device;

the chain type feeding device conveys the reinforcing steel bars to the stepping feeding device;

and the stepping feeding device conveys the reinforcing steel bars to an alignment station one by one.

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