An arch frame flower bar feeding mechanism

Abstract

The present invention discloses a feeding mechanism for the arch frame stirrups, which includes a bin that provides the arch frame stirrups one by one in a flat state. There is a receiving platform below the bin, and behind the receiving platform there is a stirrup pushing plate driven by a pushing cylinder. The stirrup pushing plate can pass through the bin. In front of the receiving platform there is a welding carrier, and on the welding carrier there is an arch frame stirrup positioning structure to enable the arch frame stirrups carried thereon to be in the corresponding positions for welding with the main arch bars. The beneficial effects of the present invention are that it can replace manual feeding, provide guarantee for the continuous welding production of arch frames or arch frame welding pieces, can significantly improve the production efficiency of arch frame welding, and reduce production costs.

Description

Technical Field

[0001] The present invention relates to an auxiliary facility for a continuous production line, in particular to a loading mechanism for the arch rib stirrups. Background Art

[0002] After the excavation of tunnels such as railways, highways, subways or high-speed railways is completed, it is necessary to install steel skeletons. The steel skeletons serve as the basic skeletons for the bottom lining concrete layer, which are used to bear the weight of the rock and soil above the tunnel and unload it on the tunnel foundation through the tunnel wall. To maintain the structural stability of the tunnel, the tunnel section is usually designed in an oval shape, and the corresponding shape of the steel skeleton matches it. When manufacturing the steel skeleton, it needs to be made in multiple sections respectively, and most sections need to be made into an arch shape, simply referred to as an arch frame. The structural forms of the arch frame include steel section arch frames and reinforced steel arch frames. The reinforced steel arch frame is mainly a lattice arch frame formed by welding threaded steel bars to form a truss structure, also known as a grid arch frame. The manufacturing of the lattice arch frame or grid arch frame mainly involves welding multiple main bars together with numerous stirrups. The most effective way to manufacture the existing grid arch frame is the die welding method that combines welding jigs and welding robots to improve efficiency and ensure welding quality. The process of the arch frame die welding method is to complete the welding of the welding pieces on one rib surface of the truss separately and then combine multiple welding pieces together. There are mainly two ways to weld the welding pieces. One is to first press and bend the main bar through a forming die to make it plastically deformed into an arch shape, and then fix the two arched main bars forming the welding piece on the die for stirrup welding; the other is to fix the two main bars forming the welding piece on the die and make them form an arch shape under the state of elastic deformation through the die, and then make it form a stable structure by welding the stirrups. This method is also the most efficient welding method currently. Since both manufacturing modes can only form one welding piece in the grid arch frame, the formation of the overall arch frame still requires the combined welding of the welding pieces. In a polygon with an odd number of sides in the arch frame section, either a double main bar structure is adopted, so that after welding the welding pieces equal to the number of sides, they are combined and welded together through direct welding between the main bars; or when combining, it is also necessary to weld the stirrups on two prism surfaces, which severely restricts the manufacturing speed of the arch frame; and the stirrups in the above two ways are all manually placed by workers at the positions where welding is required, which also affects the production efficiency to a certain extent. Therefore, the inventor of the present application constructed a continuous welding production that can realize the welding of arch frame welding pieces or the whole arch frame by utilizing the elastic characteristics of steel bars and adopting die welding technology to significantly improve the production efficiency. However, this production method requires a stirrup loading mechanism to solve the problem of automatic feeding, thereby laying a foundation for the improvement of welding efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a loading mechanism for the arch rib stirrups in view of the deficiencies in the low welding efficiency of the arch rib stirrups or arch frame welding pieces in the prior art, so as to automatically feed during the welding process of the arch frame or arch frame welding pieces, provide guarantee for continuous welding production, thereby improving the welding efficiency and reducing the manufacturing cost of the arch frame.

[0004] To achieve the foregoing objectives, the present invention adopts the following technical solutions.

[0005] An arch frame rib feeding mechanism includes a bin that provides arch frame ribs one by one in a flat state. A receiving platform is provided below the bin. A rib pushing plate driven by a pushing cylinder is provided behind the receiving platform. The rib pushing plate can pass through the bin. A welding stage is provided in front of the receiving platform. An arch frame rib positioning structure is provided on the welding stage to enable the arch frame ribs carried thereon to be in corresponding positions for welding with the main ribs of the arch frame.

[0006] In the present invention adopting the foregoing technical solutions, the arch frame ribs are stacked one by one upward in the bin in a flat state. Under the action of gravity, the lowermost rib falls onto the receiving platform. The rib pushing plate is driven by the pushing cylinder and pushes the arch frame rib on the receiving platform from below the bin from back to front onto the welding stage, and the arch frame rib is limited to a set position through the rib positioning structure, and this position is exactly the corresponding position for welding the arch frame rib with the main rib of the arch frame. Its structure is simple and the layout is compact. When in use, only need to put the arch frame ribs into the bin one by one, or an automatic sliding chute can be provided at the entrance of the bin, and the arch frame ribs can be put into the chute in sequence. It can be used to replace manual placement of ribs and is especially suitable for continuously welding arch frames or arch frame solder joints, which can significantly improve production efficiency and reduce the production cost of arch frames.

[0007] Preferably, the welding stage is arranged parallel to the receiving platform and is lower than the receiving platform; in the use state, the welding stage is located inside the main rib of the arch frame corresponding to the cross-section of the polygonal arch frame, and the front end of the receiving platform is located outside the main rib of the arch frame corresponding to the cross-section of the polygonal arch frame, and the receiving platform is not lower than the main rib of the arch frame. So that the arch frame ribs can pass above the corresponding main rib of the arch frame and slide onto the welding stage for welding with the main rib; it can be used for pushing ribs on the horizontal and inclined upward rib surfaces. Among them, the welding stage and the receiving platform are parallel and in the same direction as the corresponding rib surface of the polygonal arch frame. When providing arch frame ribs for the horizontal rib surface, the welding stage and the receiving platform are both arranged horizontally; when passing the arch frame ribs through the inclined upward rib surface, the welding stage and the receiving platform are both arranged in an inclined upward manner. In this solution, after the arch frame rib is pushed onto the welding stage, the corresponding main rib of the arch frame can prevent the arch frame rib from sliding.

[0008] Preferably, the welding platform is arranged to be liftable or rotatable; and in the use state, the material receiving platform extends from the outside to the inside of the corresponding arch rib main reinforcement under the corresponding arch rib main reinforcement, and there is a spacing for the arch rib stirrup to pass between the material receiving platform and the corresponding arch rib main reinforcement. So as to push the stirrup from under the main reinforcement; the welding platform being arranged to be liftable and rotatable is used for horizontal or inclined downward pushing; among them, the lifting scheme is used to push the stirrup for forming a prism surface parallel to the pushing direction; the flipping scheme is used to push the stirrup for forming a prism surface at a set angle with the pushing direction in front of the pushing.

[0009] Further preferably, the welding platform is arranged to be rotatable, the welding platform is hinged with a flipping driving cylinder, and a flipping limiting structure for limiting its flipping angle is arranged beside the welding platform. So as to send the stirrup to the welding position of the corresponding prism surface.

[0010] Even more preferably, the flipping driving cylinder is hinged and arranged through the middle of the cylinder block. To have a compact structure, save space and facilitate the overall layout.

[0011] Further preferably, the welding platform is arranged to be liftable and is driven to lift by an electric cylinder or a cylinder. To facilitate controlling the lifting height through a program, simplify the mechanical structure and improve the reliability; obviously, adopting a lead screw nut pair lifting structure driven by a servo motor or a stepping motor is basically the same structure as that driven by an electric cylinder, but compared with the electric cylinder, it needs to be subjected to dust-proof sealing treatment or a dust-proof structure is set, and the electric cylinder can be directly adopted without additional treatment. When the cylinder is used to drive the lifting, only the lifting stroke needs to be controlled through a forming switch.

[0012] Preferably, the arch rib stirrup positioning structure is composed of a plurality of positioning pins distributed along the shape of the arch rib stirrup. To utilize the stirrup shape, simplify the positioning structure and reduce the manufacturing cost.

[0013] Preferably, the welding platform is made of an insulating material, or when the arch rib stirrup is in the welding position, the surface of the area where the arch rib stirrup contacts the welding platform is covered or embedded with an insulating material. To avoid the contact points between the stirrup or the main reinforcement and the bearing platform from being accidentally welded together and ensure the reliability.

[0014] Preferably, the stirrup pushing plate is slidably connected with the wall plate through guide grooves arranged on both side wall plates; the wall plates are fixedly connected to the bottom plate; the bottom plate is arranged on the working platform in a position-adjustable manner, and the position adjustment moving direction of the bottom plate is consistent with the normal direction of the corresponding part of the arch. So as to adjust the position according to the curvature change during the welding of the arch or the arch welding piece and improve the adaptability.

[0015] Further preferably, a lead screw nut adjustment structure is arranged between the bottom plate and the working platform. To improve the convenience of position adjustment.

[0016] The beneficial effects of the present invention are as follows: it can replace manual feeding, provide guarantee for continuous welding production of arch frames or arch frame welding sheets, significantly improve the welding production efficiency of arch frames, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention.

[0018] Figure 2 It is the present invention Figure 1 top view.

[0019] Figure 3 It is a schematic structural diagram of the cross-section of an arch frame welded by applying the present invention.

[0020] Figure 4 It is a schematic structural diagram of a prism surface structure welded by applying the present invention.

[0021] Figure 5 It is a schematic structural diagram of an arch frame rib for forming the prism surface of an arch frame pushed by applying the present invention.

[0022] Figure 6 It is a schematic structural diagram of Embodiment 2 of the present invention.

[0023] Figure 7 It is a schematic structural diagram of Embodiment 3 of the present invention.

[0024] Figure 8 It is a schematic structural diagram of Embodiment 4 of the present invention.

[0025] Figure 9 It is a schematic structural diagram of Embodiment 5 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.

[0027] Embodiment 1, refer to Figure 1 、 Figure 2 and in combination with Figure 3 、 Figure 4 、 Figure 5 An arch frame rib feeding mechanism includes a bin 1 that provides arch frame ribs one by one in a flat state. A receiving platform 16 is provided below the bin 1. A rib pushing plate 3 driven by a pushing cylinder 2 is provided behind the receiving platform 16. The rib pushing plate 3 can pass through the bin 1. A welding carrier 4 is provided in front of the receiving platform 16. An arch frame rib positioning structure is provided on the welding carrier 4 so that the arch frame ribs carried thereon are in corresponding positions for welding with the main arch frame ribs.

[0028] Among them, the flower rib push plate 3 is slidably connected to the wall plate through the guide grooves 9a provided on the two side wall plates 9; the wall plates are fixedly connected to the bottom plate 7; the bottom plate 7 is adjustably arranged on the working platform 8, and the position adjustment and movement direction of the bottom plate 7 is consistent with the normal direction of the corresponding part of the arch frame; Figure 4 The shown arch frame is linear, and the movement direction of the bottom plate 7 is perpendicular to the longitudinal direction of the arch frame; when the arch frame is arc-shaped, the movement direction of the bottom plate 7 is consistent with the normal direction, that is, the perpendicular direction to the tangent of the corresponding arc of the arch frame. A lead screw nut adjustment structure is provided between the bottom plate 7 and the working platform 8, including a lead screw 10, a nut 11 and two lead screw seats 12. The lead screw 10 is rotatably supported on the two lead screw seats 12, the lead screw seats 12 are fixed on the working platform 8, and the nut 11 is fixed on the bottom plate 7; the bottom plate 7 and the working platform 8 are guided by two circular guide columns 14. The circular guide columns 14 are fixed on the working platform 8 through mounting seats 15, and a guide sleeve cooperating with the circular guide columns 14 is fixedly connected to the bottom plate 7.

[0029] The welding platform 4 is arranged to be rotatable. The welding platform 4 is hinged with a turning drive cylinder 5. The turning drive cylinder 5 is hinged to the two side wall plates 9 through the middle of the cylinder block, or is hinged to a turning cylinder seat, and the turning cylinder seat is fixed on the bottom plate 7 or the side wall plate 9; a turning limit structure for restricting the turning angle of the welding platform 4 is arranged beside the welding platform 4; and in the use state, the material receiving platform 16 extends from below the corresponding arch frame main reinforcement, from the outside of the corresponding main reinforcement to the inside, and there is a spacing for the arch frame flower ribs to pass through between the welding platform 4 and the corresponding arch frame main reinforcement. The turning limit structure includes an angle steel type limit seat 13, and the angle steel type limit seat 13 is fixed on the bottom plate 7; a limit protrusion is arranged on the angle steel type limit seat 13; the arch frame flower rib positioning structure is composed of a plurality of positioning nails 6 distributed along the shape of the arch frame flower ribs. The distribution of the positioning nails 6 can limit the longitudinal movement limit position and the left and right positions of the flower ribs. The limit protrusion on the angle steel type limit seat 13 abuts against the positioning nails 6 to limit the limit position of the turning of the welding platform 4; the welding platform 4 is made of an insulating material, or when the arch frame flower ribs are in the welding position, the surface of the area where the arch frame flower ribs contact the welding platform 4 is covered or embedded with an insulating material.

[0030] Figure 5 It is shown that the shape of the arch frame flower rib is an open trapezoid with a tail fin. After the tail fin is welded to the main reinforcement, the opening is closed, and the adjacent tail fins are combined to form the top of an inverted trapezoid, so that the arch frame forms a combined structure of positive and negative staggered trapezoids along the longitudinal direction.

[0031] The silo 1 includes a rear silo wall 1a which is vertically arranged and bent from a plate into the shape of an arch ribbed flower tendon. In front of the rear silo wall 1a, a fence-like front silo wall is formed by a plurality of vertically arranged columns or risers. The front silo wall also includes a connecting plate 1b for fixedly connecting a plurality of columns or risers together respectively from the top and bottom of the columns or risers. The connecting plate at the lower end and the rear silo wall 1a are both arranged in a manner of being suspended in the middle. Both ends of the connecting plate at the lower end and the rear silo wall 1a are fixedly connected to two side wall plates 9, and the front silo wall is higher than the rear silo wall 1a to facilitate the feeding of the arch ribbed flower tendon.

[0032] In this embodiment, for more convenient feeding of the ribbed flower tendon, preferably, a material chute is arranged obliquely backward and upward at the top of the rear silo wall 1a so as to place the arch ribbed flower tendon in the material chute and automatically slide into the silo 1 by gravity and form a stacked state one by one in the silo. Although the structure of the material chute is not shown in the drawings, those skilled in the art should understand that this material chute has the same structure as a common automatic chute, and only the size adapted to the arch ribbed flower tendon needs to be considered.

[0033] In this embodiment, the ribbed flower tendon pushing plate 3 is horizontally arranged, and the angle steel type limiting seat 13 restricts the welding platform 4 at the position where it is turned to a vertical state, corresponding to pushing the ribbed flower tendon for the vertical rib surface of the arch.

[0034] Embodiment 2, see Figure 6 , the ribbed flower tendon pushing plate 3 is horizontally arranged, and the angle steel type limiting seat 13 restricts the welding platform 4 at the position where it is turned to a 60-degree inclined state, corresponding to pushing the ribbed flower tendon for the 60-degree inclined rib surface of the arch.

[0035] The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be described herein again.

[0036] Embodiment 3, see Figure 7 , the ribbed flower tendon pushing plate 3 is arranged at a 30-degree downward inclination, and the welding platform 4 is fixedly arranged; the welding platform 4 is arranged in parallel with the material receiving platform 16 and is lower than the material receiving platform 16; in the use state, the welding platform 4 is located inside the main arch ribs corresponding to the cross-section of the multi-sided arch, and the front end of the material receiving platform 16 is located outside the main arch ribs corresponding to the cross-section of the multi-sided arch, and the material receiving platform 16 is not lower than the main arch ribs.

[0037] The rest of the structure of this embodiment is the same as that of Embodiment 1 or 2 and will not be described herein again.

[0038] Embodiment 4, see Figure 8 , the ribbed flower tendon pushing plate 3 is horizontally arranged, the welding platform 4 is parallel to the material receiving platform 16 and is arranged to be liftable; and is driven to lift by an electric cylinder or a cylinder.

[0039] The rest of the structure of this embodiment is the same as that of Embodiment 3 and will not be described herein again.

[0040] Embodiment 5, seeFigure 9 , the flower rib pushing plate 3 is arranged at an upward inclination of 60 degrees.

[0041] The remaining structures of this embodiment are the same as those of Embodiment 3 and will not be described herein again.

[0042] Similarly, the welding platform 4 in the aforementioned Embodiments 3 and 5 can also adopt a lifting structure driven by an electric cylinder or a pneumatic cylinder.

[0043] The feeding mechanism in the aforementioned embodiments is applicable to Figure 3 In the arch frame with a triangular cross-section shown, one rib surface is arranged horizontally or vertically, and two rib surfaces are arranged obliquely; the feeding mechanism of Embodiment 1 is used for the vertical rib surface, Embodiment 4 is used for the horizontal rib surface, and Embodiments 2, 3, and 5 are used for the inclined rib surfaces. When used for welding an arch frame with a quadrilateral cross-section, the rib surfaces can be arranged to include only horizontal and vertical states, and the mechanisms of Embodiment 1 and Embodiment 4 can be adopted; when it is necessary to weld flower ribs between the diagonal main reinforcements, Embodiments 2, 3, and 5 can also be used, and the welding platform 4 can be flipped to be inclined or an inclined feeding mechanism can be arranged.

[0044] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An arch frame flower bar feeding mechanism, characterized in that, it includes a bin (1) that provides arch frame flower bars one by one in a flat state. A receiving platform (16) is provided below the bin (1). A flower bar pushing plate (3) driven by a pushing cylinder (2) is provided behind the receiving platform (16). The flower bar pushing plate (3) can pass through the bin (1). A welding stage (4) is provided in front of the receiving platform (16). An arch frame flower bar positioning structure is provided on the welding stage (4) so that the arch frame flower bars carried thereon are in corresponding positions for welding with the arch frame main bars; the arch frame flower bar positioning structure is composed of a plurality of positioning nails (6) distributed along the shape of the arch frame flower bars; the flower bar pushing plate (3) is slidably connected to the wall panels through guide grooves provided on both side wall panels; the wall panels are fixedly connected to the bottom plate (7); the bottom plate (7) is adjustably positioned on the working platform (8), and the position adjustment moving direction of the bottom plate (7) is consistent with the normal direction of the corresponding part of the arch frame, so as to adjust the position according to the curvature change during the welding of the arch frame or the arch frame welding piece; a lead screw nut adjustment structure is provided between the bottom plate (7) and the working platform (8); the welding stage (4) is arranged in parallel with the receiving platform (16) and is lower than the receiving platform (16); in the use state, the welding stage (4) is located inside the arch frame main bars corresponding to the cross-section of the polygonal arch frame, and the front end of the receiving platform (16) is located outside the arch frame main bars corresponding to the cross-section of the polygonal arch frame. The receiving platform (16) is not lower than the arch frame main bars. The arch frame flower bars pass above the corresponding arch frame main bars and slide onto the welding stage (4); it can be used for pushing flower bars on horizontal and inclined upward prism surfaces. Among them, the welding stage (4) and the receiving platform (16) are parallel and in the same direction as the corresponding prism surface of the polygonal arch frame; after the arch frame flower bars are pushed onto the welding stage (4), the corresponding arch frame main bars can prevent the arch frame flower bars from sliding; or, the welding stage (4) is arranged to be liftable or rotatable; and in the use state, the receiving platform (16) extends from below the corresponding arch frame main bars, from the outside of the corresponding main bars to the inside, and there is a spacing for the arch frame flower bars to pass between the receiving platform (16) and the corresponding arch frame main bars, so as to push the flower bars from below the main bars; the welding stage (4) being arranged to be liftable and rotatable is both used for horizontal or inclined downward pushing; among them, the lifting of the welding stage (4) is used for pushing the flower bars for the prism surface parallel to the pushing direction; the rotation of the welding stage (4) is used for pushing the flower bars for the prism surface with a set angle between the front of the pushing and the pushing direction.

2. The arch frame flower bar feeding mechanism according to claim 1, characterized in that, the welding stage (4) is arranged to be rotatable. The welding stage (4) is hinged with a rotation driving cylinder (5), and a rotation limiting structure for restricting its rotation angle is provided beside the welding stage (4).

3. The arch frame flower bar feeding mechanism according to claim 2, characterized in that, the rotation driving cylinder (5) is hinged through the middle of the cylinder block.

4. The arch frame flower bar feeding mechanism according to claim 1, characterized in that, the welding stage (4) is arranged to be liftable and is driven to lift by an electric cylinder or a cylinder.

5. The arch rib reinforcing bar feeding mechanism according to claim 1, characterized in that, the welding stage (4) is made of an insulating material, or when the arch rib reinforcing bar is in the welding position, the surface of the area where the arch rib reinforcing bar contacts the welding stage (4) is covered or embedded with an insulating material.

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