Fixture special for welding at intersection of building steel structures

Abstract

The invention provides a special fixture for welding at the intersection of building steel structures, and effectively solves the problems that when a keel and a bracket in an existing steel structure are welded, the welding assembly of an arc-shaped keel cannot be competent, the welding construction of the top of a cage type building cannot be met, the size of the keel cannot be self-adapted, and the perpendicularity of a supporting rod and the keel cannot be ensured. According to the technical scheme, the device comprises a base, a circular ring is arranged on the upper side of the base, and a plurality of clamping units are arranged on the circular ring; the clamping unit comprises a vertical plate, a screw penetrates through the vertical plate, a driven gear is arranged on the screw, a spiral groove is formed in the screw, and a fixing block is fixed to the vertical plate. A clamping jaw is arranged at the end part of the telescopic rod; a plurality of transmission gears capable of rotating are installed on the outer side of the circular ring and correspond to the driven gears in a one-to-one mode, a gear ring capable of rotating is installed on the outer side of the base, the gear ring rotates to drive the transmission gears to rotate at the same time, and then the driven gears are driven to rotate together.

Description

Technical Field

[0001] The present invention relates to the technical field of welding of building steel structures, in particular to a special fixture for welding at the intersection of building steel structures. Background Art

[0002] In steel structure special-shaped buildings, especially spherical arch beam buildings, the welding quality of the keels directly determines the overall stability of the steel structure. The welding quality at the intersection of the profiled steel in the spherical building directly affects the overall stability of the steel structure.

[0003] Patent document CN116140856B discloses a steel structure welding process, which is for the welding of the keels on the upper part of a steel structure agricultural greenhouse. In this solution, before welding, the bracket and the keel are fixed by a transverse fastening structure and a longitudinal fastening structure under the action of a linkage structure, and then the first screw 3 is screwed to make the ends of the two brackets 1 approach each other, and the lower end surfaces of the ends of the two brackets 1 gradually fit against the upper end surface of the keel 23, and finally stable welding is achieved. Essentially, the fixture disclosed realizes the welding of the keel and the bracket, and the welding joint is offset, and the bracket 1 and the keel 23 are in close contact during the welding process to ensure the welding quality. However, the fixture in this solution also has the following defects in use: First, this solution is applicable to straight keels and is not suitable for profiled keels with arcs, such as the welding of the arc keels at the upper end of a spherical building.

[0004] Second, in the above document, the keel is integral at the intersection, which is only suitable for the case of welding struts on both sides of a straight keel and does not have the ability to converge multiple components at one place, so it cannot meet the welding of the steel structure at the top of a cage-shaped building; this solution is applicable to buildings with a single keel but not suitable for the welding construction at the top of a spherical cage-shaped building.

[0005] Third, in the use of the fixture in this solution, it is necessary to screw multiple second screws 17 to clamp the ends of the brackets. If the ends of the brackets are not clamped, the welding angle of the brackets will deviate; in addition, the fixture lacks fixation of the keel. As is well known, the keel generally uses profiles or steel bars. If the width or diameter of the keel itself is small, the phenomenon of keel skew is likely to occur; there are many matching methods for the sizes of the keel and the strut, but the fixture in this solution cannot adapt to the sizes of the keel and the bracket, cannot ensure that the strut direction is perpendicular to the keel direction, and is inconvenient to operate.

[0006] To solve the above problems, a special fixture for welding at the intersection of building steel structures is provided, which can meet the welding and assembly requirements of arc-shaped keels and struts, can adapt to the welding construction at the top of a spherical cage, can adapt to keels and struts of different sizes, can ensure the perpendicularity of the keel and the strut, is convenient and reliable to operate, and has a wider adaptation range. Summary of the Invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a special fixture for welding at the intersection of building steel structures, effectively solving the problems that when welding the keel and the bracket in the existing steel structure, it is not competent for the welding and assembly of the arc-shaped keel, it is impossible to meet the welding construction at the top of the cage-shaped building, it cannot adapt to the keel size, and it cannot ensure the perpendicularity of the support rod and the keel.

[0008] The technical solution it adopts is as follows: It includes a horizontal disc-shaped base, a horizontal ring is arranged on the upper side of the base, and a plurality of clamping units are evenly distributed in a circle on the ring; The clamping unit includes a vertical plate, a horizontal screw rod penetrates through the vertical plate, a passive gear is sleeved on the screw rod, the passive gear is screwed together with the screw rod through threads, a spiral groove is arranged on the screw rod, and a fixed block corresponding to the groove is fixed on the vertical plate; when the passive gear rotates, it can drive the screw rod to move along its axial direction, and then rotate self-axially under the action of the groove and the fixed block; one end of the screw rod close to the center of the base has a telescopic rod perpendicular to it, the middle of the screw rod and the telescopic rod are hinged together, and a claw is hinged at the end of the telescopic rod; in the initial state, the telescopic rod is inclined; the claws at the ends of two adjacent telescopic rods cooperate with each other to connect and clamp the workpiece, so that a plurality of telescopic rods are connected end to end; A plurality of rotatable transmission gears are installed on the outer side of the ring, the plurality of transmission gears correspond to the plurality of passive gears one by one, a rotatable toothed ring is installed on the outer side of the base, and the rotation of the toothed ring can drive a plurality of transmission gears to rotate at the same time, thereby driving a plurality of passive gears to rotate together.

[0009] Furthermore, an arc-shaped plate is arranged at the lower end of the vertical plate, the arc-shaped plate is located inside the ring, a T-shaped groove is opened on the arc-shaped plate, a T-shaped block is fixed on the inner side of the ring, and the T-shaped block is placed in the T-shaped groove and can slide relative to each other, thereby realizing the up and down swing of the vertical plate.

[0010] Furthermore, the outer circumferential surface of the transmission gear is spherical, and the center of the sphere of the spherical shape is located on the central axis of the corresponding arc-shaped plate.

[0011] Furthermore, a vertical lead screw penetrates through the base, the lead screw is rotatably installed on the base, a nut is sleeved on the lead screw, a plurality of connecting rods evenly distributed in a circle are hinged on the nut, the plurality of connecting rods correspond to the plurality of arc-shaped plates one by one, and the end of the connecting rod away from the nut is hinged to the arc-shaped plate; the rotation of the lead screw can drive the nut to move up and down, and the up and down movement of the nut controls the inclination angle of the vertical plate through the connecting rod.

[0012] Furthermore, the telescopic rod includes a rectangular cylinder, there is a slidable square shaft at both ends inside the rectangular cylinder, the two square shafts are connected by a compression spring, the claw is hinged to the square shaft through a torsion spring, and the claw can swing in the plane formed by the axis of the square shaft and the axis of the screw rod.

[0013] Further, there is a raised ring on the end face of the passive gear, and a circular raised portion on the vertical plate. The circular raised portion is placed inside the raised ring, and a bearing is installed between the circular raised portion and the raised ring.

[0014] Further, the cross-section of the claw is V-shaped, and multiple small rods are provided on both side plates of the V shape. When the two claws cooperate with each other and clamp the workpiece, the multiple small rods on the two claws are distributed in an interlaced manner, so that the two claws do not separate.

[0015] The structure of the present invention is ingenious, can meet the welding and assembly requirements of the arc-shaped keel and the strut, can adapt to the welding construction of the spherical cage top, can adapt to keels and struts of different sizes, can ensure the perpendicularity of the keel and the strut, is convenient and reliable to operate, and has a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view cross-sectional view of the present invention.

[0017] Figure 2 It is a top view cross-sectional view of the present invention.

[0018] Figure 3 It is an overall schematic diagram of the present invention (the lead screw, connecting rod, gear ring, passive gear, and driving gear are not shown).

[0019] Figure 4 It is a structural diagram of the clamping unit in the present invention.

[0020] Figure 5 It is a structural diagram of the base and the circular ring in the present invention.

[0021] Figure 6 It is a schematic diagram of an example of the steel structure that can be welded in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following further elaborates in detail on the specific embodiments of the present invention with reference to the accompanying drawings.

[0023] Provided by Figures 1 to 6 the present invention includes a horizontal disc-shaped base 1, there is a horizontal circular ring 2 above the base 1, and there are multiple clamping units evenly distributed in a circumferential manner on the circular ring 2; The described clamping unit includes a vertical standing plate 3. A horizontal screw rod 4 passes through the standing plate 3. A passive gear 5 is sleeved on the screw rod 4. The passive gear 5 is screwed to the screw rod 4 through threads. There is a spiral groove 6 on the screw rod 4, and a fixed block 7 corresponding to the groove 6 is fixed on the standing plate 3. When the passive gear 5 rotates, it can drive the screw rod 4 to move along its axial direction, and then rotate itself under the action of the groove 6 and the fixed block 7. One end of the screw rod 4 close to the center of the base 1 has a telescopic rod perpendicular to it. The screw rod 4 is hinged to the middle of the telescopic rod, and a claw 8 is hinged to the end of the telescopic rod. In the initial state, the telescopic rod is inclined. The claws 8 at the ends of two adjacent telescopic rods cooperate with each other to clamp the workpiece, so that multiple telescopic rods are connected end to end. A plurality of rotatable transmission gears 9 are installed on the outer side of the described ring 2. The plurality of transmission gears 9 correspond to the plurality of passive gears 5 one by one. A rotatable gear ring 10 is installed on the outer side of the base 1. The rotation of the gear ring 10 can drive the plurality of transmission gears 9 to rotate simultaneously, and then drive the plurality of passive gears 5 to rotate together.

[0024] In order to enable the standing plate 3 to swing up and down to clamp an arc-shaped workpiece, an arc-shaped plate 11 is provided at the lower end of the standing plate 3. The arc-shaped plate 11 is inside the ring 2. A T-shaped groove 12 is provided on the arc-shaped plate 11, and a T-shaped block 13 is fixed on the inner side of the ring 2. The T-shaped block 13 is placed in the T-shaped groove 12 and can slide relative to each other, thereby realizing the up and down swing of the standing plate 3.

[0025] In order to enable the passive gear 5 and the transmission gear 9 to always maintain transmission during the up and down swing of the standing plate 3, the contour of the outer circular surface of the transmission gear 9 is spherical, and the center of the sphere of the sphere is on the central axis of the corresponding arc-shaped plate 11.

[0026] In order to control the inclination angle of the standing plate 3 and thus accurately adapt to welding workpieces with different arcs, a vertical lead screw 14 passes through the base 1. The lead screw 14 is rotatably installed on the base 1. A nut 15 is sleeved on the lead screw 14. A plurality of connecting rods 16 evenly distributed in a circle are hinged to the nut 15. The plurality of connecting rods 16 correspond to the plurality of arc-shaped plates 11 one by one. One end of the connecting rod 16 away from the nut 15 is hinged to the arc-shaped plate 11. The rotation of the lead screw 14 can drive the nut 15 to move up and down, and the up and down movement of the nut 15 controls the inclination angle of the standing plate 3 through the connecting rod 16.

[0027] The telescopic rod includes a rectangular cylinder 17. There is a slidable square shaft 18 at both ends inside the rectangular cylinder 17. The two square shafts 18 are connected by a compression spring. The claw 8 is hinged to the square shaft 18 through a torsion spring. The claw 8 can swing in the plane formed by the axis of the square shaft 18 and the axis of the screw rod 4.

[0028] To install the passive gear 5, there is a raised ring on the end face of the passive gear 5, and a circular protrusion on the vertical plate 3. The circular protrusion is placed inside the raised ring, and a bearing is installed between the circular protrusion and the raised ring.

[0029] In order to make the two claws 8 that cooperate with each other engage with each other and not separate during use, the cross-section of the claw 8 is V-shaped, and a plurality of small rods 19 are arranged on both side plates of the V-shape. When the two claws 8 cooperate with each other and clamp the workpiece, the plurality of small rods 19 on the two claws 8 are staggered with each other, so that the two claws 8 do not separate.

[0030] It should be noted that a bearing is installed between the lead screw 14 and the base 1; a bearing is installed between the central shaft of the transmission gear 9 and the transmission gear 9, and the central shaft of the transmission gear 9 is fixed on the ring 2; a bearing is installed between the gear ring 10 and the base 1.

[0031] In the above, although the structure and helix direction of the groove 6 can be clearly obtained according to the function and motion state, and it is not difficult for mechanical practitioners to reverse-derive, in order to make the reader more clearly understand the solution of the present invention, the groove 6 will be explained in detail here. Specifically, in the present invention, in the initial state, the telescopic rod is in an inclined state with one end higher and the other end lower. A plurality of telescopic rods are connected end to end to form a structure similar to a space quadrilateral. The inclination directions of two adjacent telescopic rods are opposite. On this basis, in order to make all the screws 4 move inward and gradually tend to be horizontal and clamp the steel structure, the helix directions of two adjacent telescopic rods need to be opposite to achieve this. In this way, it can be obtained that the helix directions of the grooves 6 on two adjacent screws 4 are opposite.

[0032] Since the present invention can be applied to many scenarios, including but not limited to Figure 6 the three structures (all are top views), where the a structure represents the intersection of two complete workpieces, that is, the most common vertical intersection, the b structure is that struts are welded on both sides of the keel, such as the steel structure of an agricultural greenhouse, and the c represents the ends of multiple workpieces converging at one place, such as the keel frame at the top of a birdcage structure, or the top steel structure of an umbrella structure, or the center of the top of a planar polygonal building structure. In the initial state, the left end of the telescopic rod at the rear is higher than the right end, and the vertical plate 3 is in a vertical state.

[0033] When it is necessary to weld the intersection of two steel bars or steel plates on a plane, as Figure 6 shown in a in the figure, at this time, the two workpieces are placed in this fixture in sequence, as Figure 2As shown, at this time, the first workpiece arranged along the left front - right rear is on the lower side, and the second workpiece arranged along the left rear - right front is on the upper side, and there is no interference between the two workpieces; at this time, hold the base 1 by hand and turn the gear ring 10. The gear ring 10 drives multiple transmission gears 9 to rotate simultaneously. The transmission gears 9 drive the driven gears 5 thereon to rotate. The driven gears 5 drive the screw rod 4 to move axially along its thread structure. At this time, the pressure exerted by the multiple claws 8 on the workpiece is getting greater and greater. The multiple small rods 19 on the mutually cooperating claws 8 are interlaced with each other, so that the mutually cooperating claws 8 do not separate from each other. As the screw rod 4 moves inward towards the vertical plate 3, the claws 8 gradually clamp the workpiece; at the same time, when the screw rod 4 moves along its own axis, under the action of the spiral groove 6 and the fixed block 7 therein, the screw rod 4 rotates by a certain angle. During the rotation of the screw rod 4, the telescopic rod gradually tends to be horizontal, and it also makes the two workpieces get closer and closer in the up - down position until the two workpieces are in close contact with each other. At this time, the welding step can be carried out. After the welding is completed, reverse - rotate the gear ring 10 until the claws 8 are separated from the workpiece.

[0034] If spherical steel frames need to be welded, at least two arc - shaped workpieces need to be cross - welded. For this, on the above basis, only need to turn the lead screw 14. The specific adjustment process: turn the lead screw 14, and the lead screw 14 drives the nut 15 to move up and down. While the nut 15 moves up and down, it drives the arc - shaped plate 11 to rotate around the T - shaped block 13 through multiple connecting rods 16 thereon. The arc - shaped plate 11 drives the vertical plate 3 to swing up and down, so as to realize the adjustment of the angle of the vertical plate 3 and realize the clamping of arc - shaped workpieces with different diameters. At this time, welding can be carried out in the above - mentioned manner. It should be emphasized that this fixture can be placed inside the arc - shaped workpiece or outside the arc - shaped workpiece, which is flexible and convenient.

[0035] If it is necessary to weld Figure 6 the struts on both sides of the keel shown in b in the figure, and when the ends of the struts are parallel to the keel, the usage method is similar to the above. For the sake of simplicity, the specific process will not be elaborated here. However, it should be noted that compared with the prior art, this device can ensure the coaxiality of the two struts and also ensure the perpendicularity of the two struts to the keel. The operation is simple and the error is greatly reduced, which helps to improve the overall performance of the steel structure.

[0036] If it is necessary to weld Figure 6 the structure shown in c in the figure, the usage method is generally the same as the above. The difference is that the four workpieces to be welded are in four directions. When the ends of the four workpieces are pushed to the middle, the two workpieces with opposite ends are at the same height, and the four workpieces are in close contact with each other, which is convenient for welding.

[0037] The present invention is not only applicable to linear keels, but also applicable to special - shaped keels with various arcs, especially steel - structure keels with spherical structures.

[0038] The present invention is not only applicable to the welding of the perpendicular intersection parts of two workpieces, but also to the welding of brackets on the main keel, and at the same time is applicable to the welding of multiple workpieces converging at one point. It can meet the welding of the steel structure at the top of the cage-type building, has a wide range of uses, and is applicable to non-standard manufacturing.

[0039] During the welding process of the present invention, it can ensure the welding angle and welding quality between workpieces, provide necessary support for the welding part during welding, so that two or more workpieces can be closely attached. In short, after adopting the present invention, the error of the welding angle can be reduced, the reasonable structure of the steel structure can be ensured, the deviation of the keel frame can be avoided, the dislocation of the supporting rods on both sides of the keel can be avoided, and the welding quality and mechanical properties can be guaranteed.

[0040] The present invention can adapt to the welding of workpieces of different sizes, without frequent screwing and fixing, can adaptively adjust, is convenient for installation and disassembly, and can greatly improve the welding efficiency.

[0041] Finally but still importantly, in the present invention, most of the welding waste residues and chips fall on the base 1. After the welding is completed, during the disassembly of the fixture, the welding waste residues and chips on the base 1 are collected centrally. In this way, not only can it prevent the welding slag from scalding the personnel below, but also can greatly reduce the pollution to the working environment, which is environmentally friendly and healthy.

[0042] The structure of the present invention is ingenious. It can meet the welding and assembly requirements of arc-shaped keels and supporting rods, can adapt to the welding construction of the spherical cage-type top, can adapt to keels and supporting rods of different sizes, can ensure the perpendicularity of the keel and the supporting rod, is convenient and reliable to operate, and has a wider scope of adaptation.

Claims

1. A special fixture for welding at the intersection of building steel structures, characterized in that, It includes a horizontal disc-shaped base (1). There is a horizontal ring (2) on the upper side of the base (1), and there are multiple clamping units evenly distributed in a circle on the ring (2). The described clamping unit includes a vertical upright plate (3). A horizontal screw (4) passes through the upright plate (3). A passive gear (5) is sleeved on the screw (4). The passive gear (5) is screwed together with the screw (4) through threads. There is a spiral groove (6) on the screw (4), and a fixed block (7) corresponding to the groove (6) is fixed on the upright plate (3). When the passive gear (5) rotates, it can drive the screw (4) to move along its axial direction, and then rotate itself under the action of the groove (6) and the fixed block (7). One end of the screw (4) close to the center of the base (1) has a telescopic rod perpendicular to it. The screw (4) is hinged to the middle of the telescopic rod, and a claw (8) is hinged to the end of the telescopic rod. In the initial state, the telescopic rod is inclined. The claws (8) at the ends of two adjacent telescopic rods cooperate with each other to clamp the workpiece, so that multiple telescopic rods are connected end to end. A plurality of rotatable transmission gears (9) are installed on the outer side of the described ring (2). The plurality of transmission gears (9) correspond to the plurality of passive gears (5) one by one. A rotatable gear ring (10) is installed on the outer side of the base (1). The rotation of the gear ring (10) can drive the plurality of transmission gears (9) to rotate simultaneously, and then drive the plurality of passive gears (5) to rotate together.

2. The special fixture for welding at the intersection of building steel structures according to claim 1, wherein The lower end of the described upright plate (13) has an arc-shaped plate (11). The arc-shaped plate (11) is inside the ring (2). A T-shaped groove (12) is opened on the arc-shaped plate (1). A T-shaped block (13) is fixed on the inner side of the ring (2). The T-shaped block (13) is placed in the T-shaped groove (12) and can slide relative to each other, thereby realizing the up and down swing of the upright plate (13).

3. The special fixture for welding at the intersection of building steel structures according to claim 2, characterized in that, The outer circular surface contour of the described transmission gear (9) is spherical, and the center of the sphere of the sphere is on the central axis of the corresponding arc-shaped plate (11).

4. The special fixture for welding at the intersection of building steel structures according to claim 2, characterized in that, A vertical lead screw (4) passes through the base (1). The lead screw (4) is rotatably installed on the base (1). A nut (15) is sleeved on the lead screw (14). A plurality of connecting rods (16) evenly distributed in a circle are hinged on the nut (15). The plurality of connecting rods (16) correspond to the plurality of arc-shaped plates (11) one by one. One end of the connecting rod (16) away from the nut (15) is hinged to the arc-shaped plate (11). The rotation of the lead screw (14) can drive the nut (15) to move up and down, and the up and down movement of the nut (15) controls the inclination angle of the upright plate (3) through the connecting rod (16).

5. The special fixture for welding at the intersection of building steel structures according to claim 1, characterized in that, The described telescopic rod includes a rectangular tube (17). There is a slidable square shaft (18) at both ends inside the rectangular tube (17). The two square shafts (18) are connected by a compression spring. The claw (8) is hinged to the square shaft (18) through a torsion spring. The claw (8) can swing in the plane formed by the axis of the square shaft (18) and the axis of the screw (4).

6. The special fixture for welding at the intersection of building steel structures according to claim 1, characterized in that, There is a raised ring on the end face of the described passive gear (5), and there is a circular raised on the upright plate (3). The circular raised is placed inside the raised ring, and a bearing is installed between the circular raised and the raised ring.

7. A special fixture for welding at the intersection of building steel structures according to claim 1, characterized in that, The cross-section of the described jaw (8) is V-shaped, and a plurality of small rods (19) are arranged on both side plates of the V shape. When the two jaws (8) cooperate with each other to clamp the workpiece, the plurality of small rods (19) on the two jaws (8) are distributed alternately, so that the two jaws (8) do not separate.

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