Movable variable-diameter processing device and processing method of lattice steel frame

Abstract

The application discloses a movable variable-diameter processing device and a processing method of a grid steel frame, and belongs to the technical field of grid steel frame tooling. The movable variable-diameter processing device of the grid steel frame can be adapted to different radius grid steel frames, has high processing efficiency and low cost. The technical scheme is as follows: the movable variable-diameter processing device of the grid steel frame comprises a processing platform, a moving limiting groove, a main reinforcement clamp and an end clamp, a plurality of moving limiting grooves are arranged in an arc shape and fixed on the processing platform, a set of main reinforcement clamps for positioning four main reinforcements is slidably installed in each moving limiting groove, two L-shaped end clamps are placed on the processing platform and located on the two sides of the plurality of moving limiting grooves, respectively. The application is used for welding processing of the grid steel frame, the position of the main reinforcement clamp in the moving limiting groove can be adjusted to adapt to the radius size of different grid steel frames, the processing cost is reduced, and the processing quality and the processing efficiency are improved.

Description

Technical Field

[0001] This invention relates to a movable variable diameter processing device and processing method for grating steel frames, belonging to the field of grating steel frame tooling technology. Background Technology

[0002] With the rapid development of tunnel construction technology, tunnels are increasingly prevalent in highway and railway engineering projects. The proportion of grating steel frames in the initial support of tunnels is also gradually increasing. During the processing of grating steel frames, the processing of molds, the quality of grating processing, and the dimensional accuracy have presented challenges for construction workers. The processing molds for grating steel frames are generally made using structural steel molds, employing the traditional method of welding steel plates with slots to fix the main reinforcement bars. After processing, removing the grating from the mold is difficult, cumbersome, and labor-intensive. Furthermore, one set of molds can only process one size of grating steel frame; when the size of the grating steel frame changes, the mold becomes unsuitable, requiring multiple sets of molds of different sizes, which is costly and inefficient. Therefore, how to solve these problems and develop a new tooling that can improve processing quality, reduce processing costs, and increase processing efficiency is a major challenge facing construction workers. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a movable variable diameter processing device and processing method for grating steel frames, which can adapt to grating steel frames of different radii, and has high processing efficiency while being low in cost.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a movable variable diameter processing device for a grating steel frame, comprising a processing platform, movable limiting channels, main rib clamps, and end clamps. Multiple movable limiting channels are arranged in an arc shape and fixed on the processing platform. A set of main rib clamps is slidably installed in each movable limiting channel, and multiple limiting devices for positioning the main rib clamps are provided. Two end clamps are placed on the processing platform, respectively located on both sides of the multiple movable limiting channels. The main reinforcement clamp includes two movable clamps arranged opposite each other. Each movable clamp includes a base plate, small wheels, a main reinforcement support plate, and rotating positioning rods. The base plate is horizontally arranged with two small wheels installed on each side. The main reinforcement support plate is vertically fixed on the longitudinal axis of the top surface of the base plate. Two main reinforcement slots are opened on one side of the main reinforcement support plate. The middle of the two rotating positioning rods is hinged to the main reinforcement support plate. The end of each rotating positioning rod is opened with a main reinforcement slot that matches the corresponding main reinforcement slot. The main reinforcement support plate is also provided with a positioning device for fixing the angle of the two rotating positioning rods. The end clamp is an L-shaped plate with four through holes on its vertical surface for connecting the two connecting angle steels at the ends of the grating steel frame.

[0005] Further, the center lines of the plurality of movable limiting channels all intersect at one point, and the plurality of movable limiting channels are all located on the same arc with the intersection of the center lines as the center of a circle.

[0006] Further, the movable limiting channel comprises two channel side plates and two channel top plates, the two channel side plates are arranged in parallel, one channel top plate of equal length is fixed on the top of each channel side plate, and the two channel side plates, the two channel top plates and a processing platform together form two opposite "-shaped channels; Small wheels on both sides of a bottom plate in the movable clamp are respectively located in the two "-shaped channels.

[0007] Further, the limiting device comprises eight fixed stop blocks and four movable stop rods, four fixed stop blocks form one group, two groups of fixed stop blocks are respectively fixed on the top surfaces of the two channel top plates, and the four movable stop rods are respectively clamped between two sides of two main rib support plates and corresponding fixed stop blocks.

[0008] Further, the main rib notch is a triangular notch with a horizontal bottom and a circular arc at the bottom corner, and the main rib bayonet is a triangular notch with a circular arc at the top corner.

[0009] Further, the positioning device is a positioning pin, pin holes are formed in the two rotary positioning rods and at corresponding positions of the main rib support plate, and the two positioning pins are detachably installed in the corresponding pin holes respectively.

[0010] Further, in the movable clamp, the two rotary positioning rods are respectively located on two sides of the main rib support plate.

[0011] A processing method for a grid steel frame comprises the following steps: S1, adjusting the position of movable clamps: marking outer diameter positions on the center lines of the plurality of movable limiting channels according to the outer diameter of a grid steel frame to be processed, pushing the movable clamp located at an outer side in each movable limiting channel to enable the bottom corner of a main rib notch on the movable clamp to be aligned with the outer diameter position, and then pushing the movable clamp located at an inner side, so that in the same movable limiting channel, the spacing between the main rib notches on two movable clamps is the width of the grid steel frame to be processed; S2, fixing the position of movable clamps: welding four fixed stop blocks on each channel top plate according to the positions of the main rib support plates adjusted in S1, enabling two fixed stop blocks to be arranged in front of and behind each main rib support plate respectively, inserting one movable stop rod between the front side and the rear side of each main rib support plate and the corresponding fixed stop block, and fixing the positions of the two movable clamps; S3. Positioning the main ribs: Place the four main ribs with the curved shape into the main rib slots in each moving clamp in turn, rotate each rotating positioning rod to make the main rib clamps match the corresponding main rib slots to clamp the main ribs. At this time, the pin holes on the rotating positioning rods are aligned with the pin holes on the main rib support plates. Insert the positioning pins to fix the rotating positioning rods. S4. Welding the figure-eight ribs and connecting ribs: Weld multiple figure-eight ribs in the steel grid frame to be processed into the inside of the four main ribs, and bend multiple connecting ribs out of steel bars and weld them to the outside of the four main ribs. S5. Welded connecting angle steel: Four connecting angle steels are arranged in pairs and fixed to two end clamps with bolts and nuts. The end clamps are placed at both ends of the main reinforcement bars so that each connecting angle steel is in contact with two main reinforcement bars and welded together. S6. Demolding of the grating steel frame: Hang the hoisting rope on the grating steel frame and lift it upwards until the hoisting rope is just under tension. Release the two end clamps from fixing the connecting angle steel, remove the positioning pin to release the limit on the rotating positioning rod, pull out the movable stop bar to release the limit on the moving clamp, and push the two moving clamps in each moving limit groove to both sides to release the grating steel frame. Lift the grating steel frame with the hoisting rope and move it to the repair welding processing area for repair welding. S7. Inspection of grating steel frame: Repeat S1 to S6 above. After the processed grating steel frames form a batch, report to the quality inspector for inspection. After the self-inspection is qualified, report to the supervising engineer for inspection. After acceptance, the qualified grating steel frame finished product is obtained.

[0012] Compared with the prior art, the present invention has the following beneficial effects.

[0013] 1. In this invention, the main rib clamp can move back and forth in the movable limiting groove, thereby adapting to different radii of the grating steel frame, eliminating the need to make grating steel frame molds of various radii. At the same time, the manufacturing cost of this invention is low, which greatly reduces the processing cost of the grating steel frame.

[0014] 2. In this invention, the rotating positioning rod and the main reinforcement support plate work together to reliably position the main reinforcement. In addition, the positioning of the connecting angle steel by the two end clamps ensures that the two connecting angle steels on the same side are on the same plane, and also ensures the welding angle of the connecting angle steel, thereby improving the processing quality of the grating steel frame.

[0015] 3. In this invention, the main reinforcement clamp includes two movable clamps, which can move freely in the movable limiting groove. Whether it is putting the main reinforcement into the main reinforcement groove during processing or taking out the grid steel frame after processing, it is very convenient and quick, thus improving the processing efficiency of the grid steel frame.

[0016] In summary, this invention reduces processing costs, improves processing quality and efficiency, and has a simple manufacturing process and is easy to operate, making it extremely valuable for widespread application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the main reinforcement clamp in this invention.

[0020] Figure 3 for Figure 2 The left view.

[0021] Figure 4 This is a schematic diagram of the end clamp in this invention.

[0022] Figure 5 for Figure 4 The left view.

[0023] Figure 6 This is a schematic diagram of the moving clamp in this invention.

[0024] Figure 7 for Figure 6 The left view.

[0025] Figure 8 This is a schematic diagram of the main rib support plate in this invention.

[0026] Figure 9 This is a schematic diagram of the rotating positioning rod in this invention.

[0027] Figure 10 This is a schematic diagram showing the usage state of the main reinforcement clamp in this invention.

[0028] Figure 11 This is a schematic diagram showing the usage state of the end clamp in this invention.

[0029] Figure 12 for Figure 11 The left view.

[0030] Figure 13 This is a flowchart of the processing method of the present invention.

[0031] In the diagram: 1 is the processing platform, 2 is the moving limiting channel, 21 is the channel side plate, 22 is the channel top plate, 3 is the main rib clamp, 4 is the end clamp, 41 is the through hole, 5 is the limiting device, 51 is the fixed block, 52 is the movable stop bar, 6 is the moving clamp, 61 is the base plate, 62 is the small wheel, 63 is the main rib support plate, 64 is the rotating positioning rod, 65 is the main rib slot, 66 is the main rib clamp, 67 is the positioning device, 7 is the main rib, 8 is the figure-eight rib, 9 is the connecting rib, and 10 is the connecting angle steel. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The present invention provides the following embodiments.

[0034] like Figure 1 As shown, the present invention provides a movable variable diameter processing device for a grating steel frame, including a processing platform 1, a movable limiting channel 2, a main rib clamp 3, and an end clamp 4. Multiple movable limiting channels 2 are arranged in an arc shape and fixed on the processing platform 1. A set of main rib clamps 3 is slidably installed in each movable limiting channel 2, and multiple limiting devices 5 are provided for positioning the main rib clamps 3. Two end clamps 4 are placed on the processing platform 1 and are located on both sides of the multiple movable limiting channels 2 respectively. like Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, the main reinforcement clamp 3 includes two movable clamps 6 arranged opposite to each other. The movable clamp 6 includes a base plate 61, small wheels 62, a main reinforcement support plate 63, and a rotating positioning rod 64. The base plate 61 is horizontally arranged, and two small wheels 62 are installed on each side. The main reinforcement support plate 63 is vertically fixed on the longitudinal axis of the top surface of the base plate 61. Two main reinforcement slots 65 are opened on one side of the main reinforcement support plate 63. The middle part of the two rotating positioning rods 64 is hinged to the main reinforcement support plate 63. The end of each rotating positioning rod 64 is opened with a main reinforcement slot 66 that cooperates with the corresponding main reinforcement slot 65. The main reinforcement support plate 63 is also provided with a positioning device 67 for fixing the angle of the two rotating positioning rods 64. like Figure 4 , Figure 5 As shown, the end clamp 4 is an L-shaped plate, and four through holes 41 are opened on the vertical plate surface of the end clamp 4 for connecting the two connecting angle steels 10 at the end of the grating steel frame.

[0035] like Figure 1 As shown, the center lines of the plurality of movable limiting channels 2 all intersect at a single point, and the plurality of movable limiting channels 2 are all located on the same arc with the intersection of the center lines as the center.

[0036] like Figure 2 , Figure 3As shown, the movable limit channel 2 comprises two channel side plates 21 and two channel top plates 22, the two channel side plates 21 are arranged in parallel, the top of each channel side plate 21 is fixedly provided with one channel top plate 22 of equal length, and the two channel side plates 21, the two channel top plates 22 and the processing platform 1 together form two opposite "匚"-shaped channels; The small wheels 62 on both sides of the bottom plate 61 in the movable fixture 6 are respectively located in the two "匚"-shaped channels.

[0037] As Figure 2 shown, the limiting device 5 comprises eight fixed stoppers 51 and four movable stop levers 52, four fixed stoppers 51 form one group, two groups of fixed stoppers 51 are respectively fixed on the top surfaces of the two channel top plates 22, and the four movable stop levers 52 are respectively clamped between two sides of the two main reinforcement support plates 63 and the corresponding fixed stoppers 51.

[0038] The limiting device 5 can be preset according to the radius size of a common grid steel frame, and can also be set on site according to the radius size of the specific grid steel frame when processing the grid steel frame.

[0039] As Figure 8 , Figure 9 shown, the main reinforcement notch 65 is a triangular notch with a horizontal bottom and an arc at the bottom corner, and the main reinforcement bayonet 66 is a triangular notch with an arc at the top corner.

[0040] As Figure 6 , Figure 8 , Figure 9 shown, the positioning device 67 is a positioning pin, pin holes are arranged on the two rotary positioning rods 64 and at corresponding positions of the main reinforcement support plate 63, and the two positioning pins are detachably installed in the corresponding pin holes respectively.

[0041] As Figure 6 , Figure 7 shown, in the movable fixture 6, the two rotary positioning rods 64 are respectively located on two sides of the main reinforcement support plate 63.

[0042] The manufacturing process of the movable variable-diameter processing device for a grid steel frame of the present invention is as follows.

[0043] First, all movable fixtures 6 are processed, assembled and welded according to the designed quantity, and the two end fixtures 4 are also processed. Then, a plurality of axes communicating with the center of a circle are marked on the processing platform 1, channel lines are drawn on both sides of each axis, and the movable limit channels 2 are welded according to the channel lines. After completion, the movable fixtures 6 are arranged oppositely in groups of two and pushed into the movable limit channels 2. Finally, the two end fixtures 4 are arranged on both sides of the plurality of movable limit channels 2, and the present invention is completed.

[0044] In the movable clamp 6, the main reinforcement support plate 63 can be made of 385.5×200×16mm steel plate, with the main reinforcement groove 65 cut out using a laser cutter or other cutting equipment, and hinge holes and pin holes machined out; the rotating positioning rod 64 can be made of 500×60mm steel strip; the base plate 61 can be made of 300×200×16mm steel plate, with two axles welded to the bottom, and small wheels 62 rotatably mounted at both ends of the axles. Here, the axles can be Φ16 steel bars with a length of 228mm, and the small wheels 62 can be 6203 bearings. The main reinforcement support plate 63 is welded along the longitudinal axis of the base plate 61, and the two rotating positioning rods 64 are hinged to the main reinforcement support plate 63, thus completing the movable clamp 6. The end clamp 4 is made of an L-shaped plate with a thickness of 16mm, a height of 389mm, and a width of 208mm, with four through holes 41 machined on it to connect with the connecting angle steel 10. In the movable limiting channel 2, the channel side plate 21 can be made of 1500×42×16mm steel strip, and the channel top plate 22 can be made of 1500×44×16mm steel strip. The channel side plate 21 and the channel top plate 22 are welded on one side, and the unwelded side is the limiting channel for the small wheel 62.

[0045] In this invention, the grating steel frame includes main ribs 7, herringbone ribs 8, connecting ribs 9, and connecting angle steel 10. The four main ribs 7 are arranged in parallel, and multiple herringbone ribs 8 are fixed at intervals inside the four main ribs 7. Multiple square ring connecting ribs 9 are fixed at intervals outside the four main ribs 7. Two connecting angle steels 10 are fixed at each end of the four main ribs 7, and each connecting angle steel 10 is fixed together with two main ribs 7.

[0046] like Figure 1 , Figure 10 , Figure 11 , Figure 12 , Figure 13 As shown, the present invention provides a method for processing a grating steel frame, comprising the following steps: S1. Adjust the position of the moving clamp 6: According to the outer diameter of the steel grid frame to be processed, mark the outer diameter position on the center line of multiple moving limiting channels 2. Push the moving clamp 6 located on the outer side in each moving limiting channel 2 so that the bottom corner of the main rib groove 65 on it is aligned with the outer diameter position. Then push the moving clamp 6 located on the inner side so that the distance between the main rib grooves 65 on the two moving clamps 6 in the same moving limiting channel 2 is the width of the steel grid frame to be processed. S2. Fixing the position of the moving clamp 6: Weld four fixing blocks 51 on the top plate 22 of each channel according to the position of the main rib support plate 63 adjusted in S1, so that there are two fixing blocks 51 at the front and back of each main rib support plate 63. Insert a movable stop bar 52 between the front and back sides of each main rib support plate 63 and the corresponding fixing blocks 51 to fix the position of the two moving clamps 6. S3, Positioning main rib 7: Place the four main ribs with the curved shape into the main rib slots 65 in each moving clamp 6 in turn, rotate each rotating positioning rod 64 so that the main rib slots 66 cooperate with the corresponding main rib slots 65 to lock the main rib 7. At this time, the pin hole on the rotating positioning rod 64 is aligned with the pin hole on the main rib support plate 63. Insert the positioning pin to fix the rotating positioning rod 64. S4. Welding the figure-eight ribs 8 and connecting ribs 9: Weld multiple figure-eight ribs 8 in the grid steel frame to be processed to the inside of the four main ribs 7, and bend multiple connecting ribs 9 with steel bars and weld them to the outside of the four main ribs 7. S5. Welding connecting angle steel 10: Four connecting angle steels 10 are grouped in pairs and fixed to two end clamps 4 with bolts and nuts. The end clamps 4 are placed at both ends of the main reinforcement 7 so that each connecting angle steel 10 is in contact with and welded together with the two main reinforcements 7. S6. Demolding of the grating steel frame: Hang the hoisting rope on the grating steel frame and lift it upwards until the hoisting rope is just under tension. Release the fixing of the two end clamps 4 and the connecting angle steel 10. Remove the positioning pin to release the limit on the rotating positioning rod 64. Pull out the movable stop bar 52 to release the limit on the moving clamp 6. Push the two moving clamps 6 in each moving limit groove 2 to both sides to release the grating steel frame. Lift the grating steel frame with the hoisting rope and move it to the welding repair processing area for welding repair. S7. Inspection of grating steel frame: Repeat S1 to S6 above. After the processed grating steel frames form a batch, report to the quality inspector for inspection. After the self-inspection is qualified, report to the supervising engineer for inspection. After acceptance, the qualified grating steel frame finished product is obtained.

[0047] Thus, in this invention, only the position of the moving clamp 6 within the moving limiting channel 2 needs to be adjusted to adapt and process grating steel frames of different radii. The structure is simple, the operation is convenient, and it is easy to promote.

[0048] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A movable variable diameter processing device for a grating steel frame, characterized in that: It comprises a processing platform (1), movable limiting channels (2), main reinforcement clamps (3) and end clamps (4), wherein a plurality of said movable limiting channels (2) are arranged in an arc shape and fixed on said processing platform (1), one set of said main reinforcement clamp (3) is slidably installed in each of said movable limiting channels (2), and a plurality of limiting devices (5) for positioning said main reinforcement clamps (3) are provided, two said end clamps (4) are placed on said processing platform (1) and are respectively located on both sides of the plurality of said movable limiting channels (2); Said main reinforcement clamp (3) comprises two oppositely arranged movable clamps (6), said movable clamp (6) comprises a bottom plate (61), small wheels (62), a main reinforcement support plate (63) and a rotation positioning rod (64), said bottom plate (61) is arranged horizontally, two said small wheels (62) are installed on both sides respectively, said main reinforcement support plate (63) is vertically fixed on the longitudinal axis of the top surface of said bottom plate (61), one side edge of said main reinforcement support plate (63) is provided with two upper and lower main reinforcement notches (65), the middle parts of two said rotation positioning rods (64) are hinged on said main reinforcement support plate (63), the end of each said rotation positioning rod (64) is provided with a main reinforcement bayonet (66) matched with the corresponding said main reinforcement notch (65), said main reinforcement support plate (63) is also provided with a positioning device (67) for fixing the angles of two said rotation positioning rods (64); Said end clamp (4) is an L-shaped plate, and four through holes (41) for connecting two connecting angle steels (10) at the end of the grid steel frame are provided on the vertical plate surface of said end clamp (4); Said movable limiting channel (2) comprises two channel side plates (21) and two channel top plates (22), two said channel side plates (21) are arranged in parallel, the top of each said channel side plate (21) is fixed with one said channel top plate (22) of equal length, two said channel side plates (21), two said channel top plates (22) and said processing platform (1) together form two oppositely arranged "匚"-shaped channels; Said small wheels (62) on both sides of the bottom plate (61) in said movable clamp (6) are respectively located in two said "匚"-shaped channels; Said limiting device (5) comprises eight fixed stop blocks (51) and four movable stop rods (52), four said fixed stop blocks (51) form one group, two groups of said fixed stop blocks (51) are respectively fixed on the top surfaces of two said channel top plates (22), four said movable stop rods (52) are respectively clamped between both sides of two said main reinforcement support plates (63) and the corresponding said fixed stop blocks (51).

2. The movable variable diameter processing device for a grating steel frame according to claim 1, characterized in that: The center lines of the plurality of said movable limiting channels (2) all intersect at one point, and the plurality of said movable limiting channels (2) are all located on the same arc with the intersection point of the center lines as the center of a circle.

3. A movable variable diameter processing device for a grating steel frame according to claim 1 or 2, characterized in that: Said main reinforcement notch (65) is a triangular notch with a horizontal bottom and a circular arc at the bottom corner, and said main reinforcement bayonet (66) is a triangular notch with a circular arc at the top corner.

4. A movable variable diameter processing device for a grating steel frame according to claim 1 or 2, characterized in that: Said positioning device (67) is a positioning pin, pin holes are provided on two said rotation positioning rods (64) and at corresponding positions of said main reinforcement support plate (63), and two said positioning pins are detachably installed in the corresponding pin holes respectively.

5. A movable variable diameter processing device for a grating steel frame according to claim 1 or 2, characterized in that: In said movable clamp (6), two said rotation positioning rods (64) are respectively located on both sides of said main reinforcement support plate (63).

6. A method for processing a grating steel frame using the processing apparatus as described in claim 1, characterized in that... comprises the following steps: S1. Adjust the position of the moving clamp (6): According to the outer diameter of the grid steel frame to be processed, mark the outer diameter position on the center line of multiple moving limiting channels (2), push the moving clamp (6) located on the outer side in each moving limiting channel (2) so that the bottom corner of the main rib groove (65) is aligned with the outer diameter position, and then push the moving clamp (6) located on the inner side so that the distance between the main rib groove (65) on the two moving clamps (6) in the same moving limiting channel (2) is the width of the grid steel frame to be processed; S2. Fixing the position of the moving clamp (6): Weld four fixed blocks (51) on each top plate (22) of each channel according to the position of the main reinforcement support plate (63) adjusted in S1, so that there are two fixed blocks (51) in front and behind each main reinforcement support plate (63). Insert a movable stop bar (52) between the front and back sides of each main reinforcement support plate (63) and the corresponding fixed blocks (51) to fix the position of the two moving clamps (6). S3, Positioning main ribs (7): Place the four main ribs with the curved shape into the main rib slots (65) in each moving clamp (6) in turn, rotate each rotating positioning rod (64) so ​​that the main rib slots (66) cooperate with the corresponding main rib slots (65) to lock the main ribs (7). At this time, the pin holes on the rotating positioning rods (64) are aligned with the pin holes on the main rib support plate (63). Insert the positioning pin to fix the rotating positioning rods (64). S4. Welding the figure-eight bars (8) and connecting bars (9): Weld multiple figure-eight bars (8) in the grid steel frame to be processed to the inside of the four main bars (7), bend multiple connecting bars (9) with steel bars and weld them to the outside of the four main bars (7); S5, Welding connecting angle steel (10): Four connecting angle steels (10) are arranged in pairs and fixed to two end clamps (4) by bolts and nuts. The end clamps (4) are placed at both ends of the main reinforcement (7) so that each connecting angle steel (10) is in contact with and welded together with the two main reinforcements (7). S6. Demolding of the grating steel frame: Hang the hoisting rope on the grating steel frame and lift it up until the hoisting rope is just under force. Release the two end clamps (4) from fixing the connecting angle steel (10), remove the positioning pin to release the limit on the rotating positioning rod (64), pull out the movable stop rod (52) to release the limit on the moving clamp (6), push the two moving clamps (6) in each moving limit groove (2) to both sides to release the grating steel frame. Lift the grating steel frame with the hoisting rope and move it to the welding repair processing area for welding repair. S7. Inspection of grating steel frame: Repeat S1 to S6 above. After the processed grating steel frames form a batch, report to the quality inspector for inspection. After the self-inspection is qualified, report to the supervising engineer for inspection. After acceptance, the qualified grating steel frame finished product is obtained.

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