Steel bar electroslag pressure welding clamp and welding machining method

Abstract

The invention discloses a steel bar electroslag pressure welding clamp and a welding machining method, and relates to the technical field of welding. The steel bar electroslag pressure welding clamp comprises a first frame, a second frame and a rotating shaft. The first frame comprises a first frame body, a first connecting arm, a limiting plate and a gear; the second frame comprises a second frame body, a second connecting arm, a bottom supporting rod and a rack; the end part of the first connecting arm and the end part of the second connecting arm are respectively provided with a clamping structure for clamping a reinforcing steel bar; two ends of the first frame body are vertically connected with a first connecting end and a second connecting end respectively, and two ends of the second frame body are vertically connected with a third connecting end and a fourth connecting end respectively; the rack is meshed with the gear and can be separated along with rotation of the second frame; two ends of the rack are respectively connected with the third connecting end and the second connecting end. The device is simple in structure and reliable in function, lifting and conveying of the second steel bars and convenient alignment of the first steel bars and the second steel bars are achieved through the first frame and the second frame which can rotate, and the welding precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a steel bar electroslag pressure welding fixture and a welding processing method. Background Art

[0002] Electroslag pressure welding is a pressure welding method that places two steel bars in a vertical butt joint, uses welding current to pass through the gap between the two steel bars, forms an arc process and an electroslag process under the flux layer, generates arc heat and resistance heat, melts the steel bars, and completes the welding by applying pressure. However, if the joint of the upper steel bar and the lower steel bar is not accurately butt jointed, resulting in quality defects such as excessive offset of the joint axis and excessive bending angle of the joint, the quality of the steel connection will be seriously unqualified, the force of the concrete component will be greatly reduced, and the structural safety will be affected.

[0003] When the building is high and the cross-sectional area of ​​the column steel bars is large at the construction site, the weight of a single steel bar is large, making it difficult for workers to lift, connect and fix the steel bars. The current electroslag pressure welding fixture is prone to cause excessive deviation of the joint axis, excessive bending angle of the joint, partial lack of fusion and other quality defects, which have a great impact on structural safety. Summary of the invention

[0004] In order to overcome the problem in the above background technology that "insufficient alignment accuracy of two steel bars will lead to reduced welding quality", the present invention provides a steel bar electroslag pressure welding fixture and a welding processing method.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A steel bar electroslag pressure welding fixture, comprising a first frame and a second frame rotatably connected to the first frame via a rotating shaft; the first frame comprises a first frame body and a first connecting arm, and the second frame comprises a second frame body and a second connecting arm; the first frame also comprises a limiting plate and a gear, one side edge of the limiting plate is connected to the first frame body, and the bottom edge is connected to the second connecting end; the gear is rotatably connected to the limiting plate; the first frame body is respectively vertically connected to the first connecting end and the second connecting end at both ends, and the second frame body is respectively vertically connected to the third connecting end and the fourth connecting end at both ends; the second frame also comprises a rack; the rack is meshed with the gear and can be disengaged as the second frame rotates; the rack is respectively connected to the third connecting end and the second connecting end at both ends.

[0006] As a further optimization scheme of the present invention, the first connecting arm end and the second connecting arm end are respectively provided with a clamping structure for clamping steel bars; the fourth connecting end is placed between the first connecting end and the second connecting end, and the rotating shaft is sequentially connected to the third connecting end, the first connecting end, the fourth connecting end, and the second connecting end; a first gap is provided between the top end of the limiting plate and the first connecting end for the fourth connecting end to realize rotation.

[0007] As a further optimization solution of the present invention, a slide groove is provided between the side wall of the limiting plate and the side wall of the first frame body, and the fourth connecting end is placed in the slide groove and can slide along the axial direction of the rotating shaft.

[0008] As a further optimization solution of the present invention, an extension portion is provided at one end of the fourth connection end away from the second frame; and a side wall of the extension portion is in contact with and slidably connected to a side wall of the limiting plate.

[0009] As a further optimization solution of the present invention, the length of the extension portion is greater than the distance between the rotating shaft and the limiting plate.

[0010] As a further optimization solution of the present invention, the first frame is provided with a first adapting groove having the same height as the first gap; and the fourth connecting end is provided with a second adapting groove capable of adapting and engaging with the first adapting groove.

[0011] As a further optimization scheme of the present invention, the second frame also includes a bottom support rod, which is arranged parallel to the second connecting arm and placed below the second connecting arm; the front side wall of the bottom support rod is rotatably connected to the front side wall of the second frame body through a hinge; a torsion spring is installed at the hinge position so that the end face of the bottom support rod has a tendency to fit against the side wall of the first frame body.

[0012] As a further optimization solution of the present invention, when the second frame slides until the fourth connection end contacts the first connection end, the top surface of the bottom support rod is at the same height as the top surface of the first connection end.

[0013] As a further optimization solution of the present invention, a stop bar for stopping the bottom support bar is provided on the rear side wall of the first connecting arm at the highest position.

[0014] A welding processing method, using a steel bar electroslag pressure welding fixture to clamp and position the steel bar and then weld it, the steps comprising: S1, sliding the second frame downward along the rotating shaft until the fourth connection end is crimped on the second connection end and / or the third connection end is crimped on the first connection end; S2, installing the first steel bar at the end of the first connecting arm, so that the top of the first steel bar is flush with the top surface of the first connection end; S3, installing the second steel bar at the end of the second connecting arm, so that the bottom end of the second steel bar is crimped on the top surface of the bottom support rod; S4, rotating the gear to drive the second frame to move upward; rotating the second frame when the fourth connection end is in contact with the first connection end; S5, when the second steel bar is rotated to just above the first steel bar, using manpower or a clamping tool to clamp the intersection of the fourth connection end and the first frame from both sides; S6, welding the connection position of the first steel bar and the second steel bar.

[0015] In summary, the present invention is beneficial in that: (1) The present invention has a simple structure and reliable functions. The second steel bar can be lifted and transported and the first steel bar and the second steel bar can be easily aligned by the rotatable first frame and the second frame, thereby improving the welding accuracy.

[0016] (2) When the second frame is located at the top dead center, the top surface of the bottom support rod is flush with the top surface of the first connecting end. Therefore, when clamping the steel bar, the top end of the first steel bar is set at the same height as the top surface of the first connecting end, and the bottom end of the second steel bar is abutted against the top surface of the bottom support rod. The present invention can be used as an indirect reference to accurately lift the bottom end of the second steel bar to a position flush with the top end of the first steel bar, thereby facilitating the alignment and release of the first steel bar and the second steel bar, thereby achieving rapid positioning and improving welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application is further described below with reference to the accompanying drawings: Figure 1 It is a front structural schematic diagram of the present invention; Figure 2 It is a front view structural diagram of the first frame and the second frame; Figure 3 It is a schematic diagram of the installation position and structure of the gear and rack from the front; Figure 4 It is a front view schematic diagram of the state where the second frame rises to the top dead center; Figure 5 It is a schematic diagram of the oblique rear view structure of the present invention; Figure 6 is an oblique rear view schematic diagram of the second frame in a rotating state; Figure 7 It is a schematic oblique rear view of the state where the first adapting groove and the second adapting groove are mutually buckled; Figure 8 It is a schematic diagram of the top view of the structure of the first fixed finger clamp and the first movable finger clamp; Fig. 9 It is a schematic diagram of the top view of the structure of the second fixed finger clamp and the second movable finger clamp; Fig.10 It is a top view schematic diagram of the installation position and structure of the abutment pad.

[0018] Description of reference numerals: In the figure, 1. first frame; 11. first frame body; 1101. first adapter slot; 111. first connection end; 112. second connection end; 113. limit plate; 1131. slide slot; 1132. first gap; 114. gear; 1141. crank; 12. first connecting arm; 121. gear lever; 122. first fixed finger clip; 1221. first slot; 1222. first insulating layer; 1223. first plug hole; 123. first movable finger clip; 1231. second slot; 1232. second insulating layer; 1233. second plug hole; 124. abutting pad; 2. second frame; 21. second frame body; 211. third connection end; 212. fourth connection end; 2121. second adapter slot; 2122. extension portion; 22. second connecting arm; 221. second fixed finger clip; 2211. third card slot; 2212. third insulating layer; 2213. third plug hole; 222. second movable finger clip; 2221. fourth card slot; 2222. fourth insulating layer; 2223. fourth plug hole; 23. bottom support rod; 231. hinge; 24. rack; 3. Rotating shaft; 4. The first steel bar; 5. The second steel bar. DETAILED DESCRIPTION

[0019] Based on the above structural features of the present application, the implementation methods of the present application are further described: The welded steel bars include a first steel bar 4 and a second steel bar 5 .

[0020] Reference Figure 1-2 The present embodiment provides a steel bar electroslag pressure welding fixture, comprising a first frame 1 and a second frame 2 rotatably connected to the first frame 1 via a rotating shaft 3. The first frame 1 is used to clamp a first steel bar 4, and the second frame 2 is used to clamp a second steel bar 5. The second frame 2 and the second steel bar 5 move upward along the rotating shaft 3 and rotate 180 degrees, so that the second steel bar 5 is placed directly above the first steel bar 4, thereby achieving precise alignment of the first steel bar 4 and the second steel bar 5, which is convenient for subsequent welding.

[0021] Reference Figure 2The first frame 1 includes a first frame 11 and a first connecting arm 12, and the first frame 11 and the first connecting arm 12 are vertically connected; the second frame 2 includes a second frame 21 and a second connecting arm 22, and the second frame 21 and the second connecting arm 22 are vertically connected; the ends of the first connecting arm 12 and the ends of the second connecting arm 22 are respectively provided with a clamping structure for clamping the steel bar. When the steel bar electroslag pressure welding fixture is placed upright, the first frame 11 and the second frame 21 are in a vertical state, and the first connecting arm 12 and the second connecting arm 22 are in a horizontal state, so that the first frame 1 is adapted to be installed on the first steel bar 4 which is usually in an upright state, and it is convenient to lift the second steel bar 5. The first connecting arm 12 is provided with at least two to achieve stable clamping of the first steel bar 4, and the first connecting arm 12 is arranged along the length direction of the first frame 11; the second connecting arm 22 is provided with at least two to achieve stable clamping of the second steel bar 5, and the second connecting arm 22 is arranged along the length direction of the second frame 21. The first frame 11 is fixedly connected to the first connecting arm 12 (for example, by welding, by integral fixing or by bolts); the second frame 21 is fixedly connected to the second connecting arm 22 (for example, by welding, by integral fixing or by bolts). The first frame 11 is in the shape of a straight rod, and the second frame 21 is in the shape of a straight rod.

[0022] Reference Figure 2 , the first frame 11 has a first connection end 111 and a second connection end 112 vertically connected at both ends, and the first frame 11, the first connection end 111 and the second connection end 112 are fixedly connected (for example, by welding, by an integrated fixed connection or by bolts) to form a C shape; the second frame 21 has a third connection end 211 and a fourth connection end 212 vertically connected at both ends, and the second frame 21, the third connection end 211 and the fourth connection end 212 are fixedly connected (for example, by welding, by an integrated fixed connection or by bolts) to form a C shape. The first connection end 111 and the second connection end 112 are both straight rod-shaped and have the same length; the third connection end 211 and the fourth connection end 212 are both straight rod-shaped and have the same length.

[0023] Reference Figure 2 and Figure 3, the fourth connection end 212 is placed between the first connection end 111 and the second connection end 112, and the first connection end 111 is placed between the third connection end 211 and the second connection end 112. The rotating shaft 3 is plugged and arranged with the third connection end 211, the first connection end 111, the fourth connection end 212, and the second connection end 112 in sequence. The first connection end 111 is provided with a first plug hole 1223, and the bottom of the rotating shaft 3 is plugged and arranged in the first plug hole 1223; the second connection end 112 is provided with a second plug hole 1233, and the middle part of the rotating shaft 3 is plugged and arranged in the second plug hole 1233; the first connection end 111 is fixedly connected to the rotating shaft 3 (for example, fixedly connected by bolts or fixedly connected by welding); the second connection end 112 is fixedly connected to the rotating shaft 3 (for example, fixedly connected by bolts or fixedly connected by welding). The third connection end 211 is provided with a third socket, the fourth connection end 212 is provided with a fourth socket 2223, the rotating shaft 3 is inserted into the third socket and the fourth socket 2223, the rotating shaft 3 is connected to the third socket through a clearance fit or through a bearing, and the rotating shaft 3 is connected to the fourth socket 2223 through a clearance fit or through a bearing, so as to realize the rotation of the second frame 2.

[0024] Reference Figure 2 The first connecting end 111 and the first connecting arm 12 are respectively arranged on both sides of the first frame 11, and the second connecting end 112 and the first connecting arm 12 are respectively arranged on both sides of the first frame 11; the third connecting end 211 and the second connecting arm 22 are respectively arranged on both sides of the second frame 21, and the fourth connecting end 212 and the second connecting arm 22 are respectively arranged on both sides of the second frame 21, so that the first connecting arm 12 and the second connecting arm 22 point to the outside respectively.

[0025] Reference Figure 3 , Figure 4 and Figure 5 The first frame 1 further includes a limit plate 113 and a gear 114. The limit plate 113 has a side edge connected to the first frame 11 (for example, fixedly connected by bolts or fixedly connected by welding), and a bottom edge connected to the second connection end 112 (for example, fixedly connected by bolts or fixedly connected by welding). A slide groove 1131 is provided between the side wall of the limit plate 113 and the side wall of the first frame 11. The fourth connection end 212 is placed in the slide groove 1131 and can slide along the axial direction of the rotating shaft 3, thereby realizing convenient longitudinal movement of the second frame 2.

[0026] Reference Figure 3 , Figure 4 and Figure 5The fourth connection end 212 is provided with an extension portion 2122 at one end away from the second frame 21, and the extension portion 2122 is fixedly connected to the fourth connection end 212 (for example, by an integrated fixed connection or by a bolted fixed connection). The side wall of the extension portion 2122 is attached to and slidably connected to the side wall of the limiting plate 113; the length of the extension portion 2122 is greater than the distance between the rotation shaft 3 and the limiting plate 113, thereby ensuring that the fourth connection end 212 will not rotate around the rotation shaft 3 when sliding on the side wall of the limiting plate 113, that is, the second frame 2 will not rotate horizontally when lifting the second steel bar 5 or resetting downward, so that the present invention has better controllability, avoids the first connecting arm 12 from accidentally rotating during the upward / downward process and hitting the user, and improves construction safety.

[0027] Reference Figure 3 and Figure 4 , the gear 114 is rotatably connected to the limiting plate 113 ; the gear 114 is mounted on the upper portion of the side wall of the limiting plate 113 away from the first frame body 11 .

[0028] The second frame 2 also includes a rack 24; the rack 24 is meshed with the gear 114 and can be disengaged as the second frame 2 rotates counterclockwise; the two ends of the rack 24 are respectively connected to the third connection end 211 and the second connection end 112 (for example, fixedly connected by bolts). The length direction of the rack 24 is arranged parallel to the axial direction of the rotating shaft 3, so when the steel bar electroslag pressure welding fixture is placed upright, the rack 24 is in a vertical state, because the rotation of the gear 114 can drive the rack 24 and the entire second frame 2 to move longitudinally.

[0029] Reference Figure 4 and Figure 5 A first gap 1132 is provided between the top of the limiting plate 113 and the first connecting end 111 for the fourth connecting end 212 to realize rotation. The first gap 1132 is used to provide an accommodation space for the fourth connecting end 212 and the extension portion 2122 to rotate.

[0030] Reference Figure 4 and Figure 5 The upper edge of the gear 114 is placed below the first gap 1132 , and ensures that the gear 114 does not block the first gap 1132 from the side, so as to prevent the gear 114 from hindering the rotation of the fourth connecting end 212 and the extending portion 2122 .

[0031] Reference Figure 5 to Figure 7 The first frame 11 is provided with a first adapting groove 1101 which is equal in height to and communicates with the first gap 1132; the fourth connection end 212 is provided with a second adapting groove 2121 which can be adapted and engaged with the first adapting groove 1101. The first adapting groove 1101 is adapted to and engaged with the second adapting groove 2121, so that the fourth connection end 212 and the first frame 11 can be interlocked, so that the second steel bar 5 can be rotated to be directly above the first steel bar 4.

[0032] The second frame 2 also includes a bottom support rod 23, which is used to conveniently realize the positioning of the height of the bottom end of the second steel bar 5, so that when the steel bars are installed, the top of the first steel bar 4 and the bottom of the second steel bar 5 have the same height, so as to facilitate the subsequent accurate docking. The bottom support rod 23 is arranged in parallel with the second connecting arm 22, and the bottom support rod 23 is placed below the second connecting arm 22; the front side wall of the bottom support rod 23 is rotatably connected to the front side wall of the second frame 21 through a hinge 231; a torsion spring is installed at the hinge 231 to make the end face of the bottom support rod 23 have a tendency to fit on the side wall of the first frame 11.

[0033] Reference Figure 2 and Figure 6 When the second frame 2 slides until the fourth connection end 212 contacts the first connection end 111, the top surface of the bottom support rod 23 is equal to the top surface of the first connection end 111, that is, the top end of the first steel bar 4 is equal to the bottom end of the second steel bar 5.

[0034] Reference Figure 7 The rear side wall of the first connecting arm 12 at the highest position is provided with a stopper 121 for stopping the bottom support rod 23. The stopper 121 is L-shaped and the bottom end is fixedly connected to the first connecting arm 12 (for example, fixedly connected by bolts). When the second frame 2 rotates to the point where the second reinforcement 5 and the first reinforcement 4 are close to each other, the stopper 121 can push the bottom support rod 23 away to leave space under the second reinforcement 5, so that the first reinforcement 4 can be accommodated under the second reinforcement 5. The stopper 121 is L-shaped and the bottom end is connected to the first connecting arm 12, so that the bottom support rod 23 and the first reinforcement 4 can be prevented from contacting, so that the first reinforcement 4, the second reinforcement 5 and the bottom support rod 23 will not be welded together.

[0035] Reference Figure 8The first connecting arm 12 is connected to a first fixed finger clamp 122 (for example, by an integrated fixed connection or by a bolt fixed connection) at one end away from the first frame body 11; the first connecting arm 12 is hinged with a first movable finger clamp 123 and a torsion spring is installed at the hinge position, so that the first fixed finger clamp 122 and the second fixed finger clamp 221 have a tendency to approach each other, so as to stably clamp the first steel bar 4. The side wall of the first fixed finger clamp 122 close to the first movable finger clamp 123 is provided with a first clamping groove 1221 adapted to clamp the first steel bar 4, and the side wall of the first movable finger clamp 123 close to the first fixed finger clamp 122 is provided with a second clamping groove 1231 adapted to clamp the first steel bar 4. A first insulating layer 1222 is provided on the side wall of the first fixed finger clamp 122 close to the first movable finger clamp 123 and the inner wall of the first slot 1221 (for example, fixedly connected by bolts, bonding, wrapping or sleeve connection); a second insulating layer 1232 is provided on the side wall of the first movable finger clamp 123 close to the first fixed finger clamp 122 and the inner wall of the second slot 1231 (for example, fixedly connected by bolts, bonding, wrapping or sleeve connection).

[0036] Reference Fig. 9 The second connecting arm 22 is provided with a second fixed finger clamp 221 (for example, connected in an integrated manner or fixedly connected by bolts) at one end away from the second frame body 21; the second connecting arm 22 is hinged with a second movable finger clamp 222 and a torsion spring is installed at the hinge position, so that the second fixed finger clamp 221 and the second movable finger clamp 222 have a tendency to approach each other, so as to stably clamp the second steel bar 5. The side wall of the second fixed finger clamp 221 close to the second movable finger clamp 222 is provided with a third clamping groove 2211 adapted to clamp the second steel bar 5, and the side wall of the second movable finger clamp 222 close to the second fixed finger clamp 221 is provided with a fourth clamping groove 2221 adapted to clamp the second steel bar 5. The side wall of the second fixed finger clamp 221 close to the second movable finger clamp 222 and the inner wall of the third slot 2211 are provided with a third insulating layer 2212 (for example, fixedly connected by bolts, bonding, coating or sleeve connection); the side wall of the second movable finger clamp 222 close to the second fixed finger clamp 221 and the inner wall of the fourth slot 2221 are provided with a fourth insulating layer 2222 (for example, fixedly connected by bolts, bonding, coating or sleeve connection). The first insulating layer 1222, the second insulating layer 1232, the third insulating layer 2212 and the fourth insulating layer 2222 are insulating and heat-resistant material layers such as heat-resistant rubber layers, ceramic layers, resin layers or composite layers.

[0037] Reference Figure 8The first fixed finger clamp 122 is provided with a first insertion hole 1223, and the first movable finger clamp 123 is provided with a second insertion hole 1233. After the user inserts the tip of an expansion tool such as needle-nosed pliers into the first insertion hole 1223 and the second insertion hole 1233, the first fixed finger clamp 122 and the first movable finger clamp 123 can be easily spread apart, thereby facilitating the first steel bar 4 to be placed in the first slot 1221 and the second slot 1231; the second fixed finger clamp 221 is provided with a third insertion hole, and the second movable finger clamp 222 is provided with a fourth insertion hole 2223. After the user inserts the tip of an expansion tool such as needle-nosed pliers into the third insertion hole and the fourth insertion hole 2223, the second fixed finger clamp 221 and the second movable finger clamp 222 can be easily spread apart, thereby facilitating the second steel bar 5 to be placed in the third slot 2211 and the fourth slot 2221.

[0038] Reference Figure 8 and Fig. 9 When the first connecting arm 12 and the second connecting arm 22 are in a left-right open state, the first movable finger clamp 123 is located on the front side of the first fixed finger clamp 122, and the second movable finger clamp 222 is located on the rear side of the second fixed finger clamp 221; when the second connecting arm 22 rotates 180 degrees and is located directly above the first connecting arm 12, the first movable finger clamp 123 and the second movable finger clamp 222 are both located on the front side, thereby facilitating the removal of the first steel bar 4 and the second steel bar 5.

[0039] Reference Fig.10 , the end of the first fixed finger clamp 122 is detachably connected with an abutment pad 124, and the abutment pad 124 is vertically connected to the end of the first fixed finger clamp 122 by bolts. When the welding station is close to the wall, the user installs the abutment pad 124 on the end of the first fixed finger clamp 122, and then presses the abutment pad 124 on the wall (or fixes the abutment pad 124 to the wall with bolts), which can improve the installation stability of the present invention. When there is a lack of building structure as a support for the present invention in the construction environment, the front side wall of the limit plate 113 or the front side wall of the first frame 11 or the front side wall of the first connecting arm 12 can be attached to the mechanical arm and connected by bolts, so as to support the present invention in a vertical state.

[0040] Reference Figure 3 A crank 1141 is fixedly mounted on the end surface of the gear 114 by bolts, and the crank 1141 is a Z-shaped rod structure.

[0041] Reference Figure 3 and Figure 4 The rack 24 is installed on the front side wall of the third connecting end 211 and the fourth connecting end 212, and the second frame 2 is rotated from the rear side to achieve giving way.

[0042] A welding method, using a steel bar electroslag pressure welding fixture to clamp and position the steel bar before welding, the steps comprising: S1, slide the second frame 2 downward along the rotating shaft 3 until the fourth connection end 212 is pressed onto the second connection end 112 and / or the third connection end 211 is pressed onto the first connection end 111; S2, installing the first steel bar 4 at the end of the first connecting arm 12, so that the top of the first steel bar 4 is flush with the top surface of the first connecting end 111; S3, installing the second steel bar 5 at the end of the second connecting arm 22, so that the bottom end of the second steel bar 5 is pressed against the top surface of the bottom support rod 23; S4, rotate the crank 1141 and drive the gear 114 to rotate, driving the second frame 2 to move upward; when the fourth connecting end 212 is in contact with the first connecting end 111, rotate the second frame 2180 degrees counterclockwise (at this time, the gear 114 is disengaged from the rack 24); S5, when the second steel bar 5 is rotated to the top of the first steel bar 4, the intersection of the fourth connecting end 212 and the first frame 11 is clamped from both sides by manpower or a clamping tool; S6. Weld the connection position between the first steel bar 4 and the second steel bar 5.

[0043] A first through hole is formed on the side wall of the first adapting groove 1101, and a second through hole is formed on the side wall of the second adapting groove 2121. The first through hole and the second through hole are adapted to each other. After the first adapting groove 1101 and the second adapting groove 2121 are engaged with each other, the first through hole and the second through hole are coaxial and connected to each other. Therefore, during step S5, the user inserts studs into the first through hole and the second through hole and then uses two nuts to respectively tighten the fourth connecting end 212 and the first frame 11, so as to lock the first frame 1 and the second frame 2, thereby preventing the first steel bar 4 and the second steel bar 5 from being disengaged during welding, thereby improving the welding accuracy.

[0044] The present invention has a simple structure and reliable functions, and realizes lifting and conveying of the second steel bar 5 and convenient alignment of the first steel bar 4 and the second steel bar 5 through the rotatable first frame 1 and the second frame 2, thereby improving welding accuracy.

[0045] When the second frame 2 is located at the top dead center, the top surface of the bottom support rod 23 is flush with the top surface of the first connecting end 111. Therefore, when clamping the steel bars, the top end of the first steel bar 4 is set at the same height as the top surface of the first connecting end 111 (for example, a flat plate is crimped on the top surface of the first connecting end 111, and then the top end of the first steel bar 4 is abutted against the bottom surface of the flat plate, and then the flat plate is removed), and the bottom end of the second steel bar 5 is abutted against the top surface of the bottom support rod 23. The present invention can be used as an indirect reference to accurately lift the bottom end of the second steel bar 5 to a position flush with the top end of the first steel bar 4, thereby facilitating the alignment and release of the first steel bar 4 and the second steel bar 5, thereby achieving rapid positioning and improving welding quality.

[0046] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. A steel bar electroslag pressure welding fixture, characterized in that: It comprises a first frame (1) and a second frame (2) rotatably connected to the first frame (1) via a rotating shaft (3); The first frame (1) comprises a first frame body (11) and a first connecting arm (12), and the second frame (2) comprises a second frame body (21) and a second connecting arm (22); two ends of the first frame body (11) are respectively vertically connected to a first connecting end (111) and a second connecting end (112), and two ends of the second frame body (21) are respectively vertically connected to a third connecting end (211) and a fourth connecting end (212); the first frame (1) further comprises a limit plate (113) and a gear (114); a side edge of the limit plate (113) is connected to the first frame body (11), and a bottom edge is connected to the second connecting end (112); the gear (114) is rotatably connected to the limit plate (113); The second frame (2) further comprises a rack (24); the rack (24) is meshed with the gear (114) and can be disengaged as the second frame (2) rotates; and two ends of the rack (24) are respectively connected to the third connection end (211) and the second connection end (112).

2. The reinforcing steel bar electroslag pressure welding fixture according to claim 1, characterized in that: The end of the first connecting arm (12) and the end of the second connecting arm (22) are respectively provided with a clamping structure for clamping a steel bar; The fourth connection end (212) is disposed between the first connection end (111) and the second connection end (112), and the rotating shaft (3) is plugged into the third connection end (211), the first connection end (111), the fourth connection end (212), and the second connection end (112) in sequence; A first gap (1132) is provided between the top end of the limiting plate (113) and the first connecting end (111) for the fourth connecting end (212) to rotate.

3. The reinforcing steel bar electroslag pressure welding fixture according to claim 2, characterized in that: A sliding groove (1131) is provided between the side wall of the limiting plate (113) and the side wall of the first frame body (11), and the fourth connecting end (212) is disposed in the sliding groove (1131) and is capable of sliding along the axial direction of the rotating shaft (3).

4. The reinforcing steel bar electroslag pressure welding fixture according to claim 3 is characterized in that: An end of the fourth connection end (212) away from the second frame (21) is provided with an extension portion (2122); a side wall of the extension portion (2122) is in contact with and slidably connected to a side wall of the limiting plate (113).

5. The reinforcing steel bar electroslag pressure welding fixture according to claim 4, characterized in that: The length of the extension portion (2122) is greater than the distance between the rotating shaft (3) and the limiting plate (113).

6. The reinforcing steel bar electroslag pressure welding fixture according to claim 5, characterized in that: The first frame (11) is provided with a first adapting groove (1101) having a height equal to that of the first gap (1132); and the fourth connecting end (212) is provided with a second adapting groove (2121) capable of adapting and engaging with the first adapting groove (1101).

7. The reinforcing steel bar electroslag pressure welding fixture according to claim 6, characterized in that: The second frame (2) further comprises a bottom support rod (23), the bottom support rod (23) being arranged parallel to the second connecting arm (22) and being placed below the second connecting arm (22); the front side wall of the bottom support rod (23) is rotatably connected to the front side wall of the second frame body (21) via a hinge (231); a torsion spring is installed at the hinge (231) so that the end surface of the bottom support rod (23) has a tendency to fit against the side wall of the first frame body (11).

8. The reinforcing steel bar electroslag pressure welding fixture according to claim 7, characterized in that: When the second frame (2) slides until the fourth connection end (212) contacts the first connection end (111), the top surface of the bottom support rod (23) is at the same height as the top surface of the first connection end (111).

9. The reinforcing steel bar electroslag pressure welding fixture according to claim 8, characterized in that: A stop rod (121) for stopping the bottom support rod (23) is provided on the rear side wall of the first connecting arm (12) at the highest position.

10. A welding method, characterized in that: The steel bar electroslag pressure welding fixture of claim 9 is used to clamp and position the steel bar and then weld it, the steps comprising: S1. Sliding the second frame (2) downward along the rotating shaft (3) until the fourth connection end (212) is crimped onto the second connection end (112) and / or the third connection end (211) is crimped onto the first connection end (111); S2, installing the first steel bar (4) at the end of the first connecting arm (12) so that the top end of the first steel bar (4) is flush with the top surface of the first connecting end (111); S3, installing the second steel bar (5) at the end of the second connecting arm (22), so that the bottom end of the second steel bar (5) is pressed against the top surface of the bottom support rod (23); S4, rotating the gear (114) to drive the second frame (2) to move upward; rotating the second frame (2) until the fourth connection end (212) is in contact with the first connection end (111); S5, when the second steel bar (5) is rotated to the position just above the first steel bar (4), the intersection of the fourth connecting end (212) and the first frame (11) is clamped from both sides by manpower or a clamping tool; S6. Welding the connection position between the first steel bar (4) and the second steel bar (5).

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