CN210615543U

CN210615543U - Automatic welding equipment for large-span straight-through cable bridge

Info

Publication number: CN210615543U
Application number: CN201921663341.1U
Authority: CN
Inventors: 王建新
Original assignee: Guangzhou Pinfa Electrical And Mechanical Technology Co ltd
Current assignee: Guangzhou Pinfa Electrical And Mechanical Technology Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-26
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to the bridge frame welding field, in particular to a large-span straight-through type cable bridge frame automatic welding device, which comprises a turnover table and a welding robot, and also comprises a positioning clamping tool arranged on a workbench of the turnover table, wherein the welding robot is arranged beside the turnover table through a walking mechanism, the positioning clamping tool comprises two long brackets, a plurality of tightening mechanisms and a plurality of pressing mechanisms, all the tightening mechanisms are evenly distributed on the turnover table along the length direction of the turnover table, all the pressing mechanisms are evenly distributed along the length direction of the turnover table at equal intervals, the lower end of the inner side of each long bracket is provided with a plurality of edge clamping pieces, the large-span straight-through type cable bridge frame automatic welding device of the utility model can conveniently and quickly clamp and fix a large-scale cable bridge frame, and is matched with a small-size reversal platform through the movable welding robot, the automatic welding device realizes the quick and efficient automatic welding of the large-scale cable bridge.

Description

Automatic welding equipment for large-span straight-through cable bridge

Technical Field

The utility model relates to a crane span structure welding field, concretely relates to straight type cable testing bridge automatic weld equipment of big span.

Background

The cable bridge is divided into structures of a groove type, a tray type, a ladder type, a grid type and the like, and comprises a support, a supporting arm, an installation accessory and the like. The inner bridge frame of the building can be independently erected and can also be attached to various buildings and pipe rack supports, the characteristics of simple structure, attractive appearance, flexible configuration, convenient maintenance and the like are reflected, and all parts need to be galvanized. The bridge frame installed outside the building in open air has the physical characteristics of corrosion resistance, moisture resistance, good adhesive force and high impact strength if the bridge frame is near seaside or belongs to a corrosion area. For the welding of large-scale cable bridge, the manual welding is often carried out through experienced workers, which wastes time and labor and has low efficiency, so that an automatic welding tool is necessary to be designed for carrying out efficient welding operation on the large-scale cable bridge.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a straight type cable testing bridge automatic weld equipment of big span.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a straight-through type cable testing bridge automatic weld equipment of big span, including roll-over table and welding robot, still including setting up the location centre gripping frock on the workstation of roll-over table, the welding robot passes through running gear and sets up in the side of roll-over table, and running gear's output direction is unanimous with the length direction of roll-over table, location centre gripping frock includes two long brackets, a plurality of tightening mechanism and a plurality of hold-down mechanism, all tightening mechanism set up on the roll-over table along the length direction evenly distributed of roll-over table, two long brackets are parallel to each other and length direction is unanimous with the length direction of roll-over table, all hold-down mechanism all are located between two long brackets, all hold-down mechanism all follow the length direction equidistant distribution of roll-over table, the inboard lower extreme of every long bracket all is provided.

As an optimal scheme of automatic welding equipment for a large-span straight-through cable bridge, the cross section of each long bracket is L-shaped, the short sides of the long brackets are in a horizontal state, the long sides of the long brackets are in a vertical state, two sliding blocks are symmetrically arranged at the bottoms of the two ends of each long bracket, linear sliding rails are arranged at the tops of the two ends of a workbench of the turnover table, the length direction of each linear sliding rail is perpendicular to the length direction of the turnover table, and the two sliding blocks at the bottoms of the long brackets are respectively in sliding connection with the two linear sliding rails.

As an optimal scheme of automatic welding equipment for a large-span straight-through type cable bridge, the number of tightening mechanisms is three groups and are respectively arranged at two ends and the middle part of a turnover table, each group of tightening mechanisms comprises a center block, two guide rods and two groups of L-shaped sliding tables symmetrically arranged at two sides of the center block, the two guide rods are mutually parallel and are perpendicular to the length direction of a long bracket, the two guide rods respectively penetrate through two ends of the center block, a center block fixing frame is arranged at the middle parts of the two guide rods, a plurality of fixing frames used for fixedly connecting the end parts of the guide rods are fixedly arranged at two sides of a table board of the turnover table, the bottoms of the two L-shaped sliding sleeves are respectively sleeved on the two guide rods in a sliding mode, and a driving mechanism used for driving the two L-shaped sliding sleeves to.

As a preferred scheme of large-span straight-through type cable testing bridge automatic weld equipment, actuating mechanism includes a major axis cylinder, a rhombus dials board and two pull rods, the rhombus dials the board and is located the bottom of center block and the center department that the rhombus dials the center of board and center block's hub connection, the one end of two pull rods dials the board length direction's both ends bottom hub connection with the rhombus respectively, the other end of two pull rods respectively with the bottom hub connection of two L type slip tables, the one end bottom that two L type slip tables are close to each other all is fixed and is provided with the thickening articulated seat that is used for supplying the pull rod hub connection, major axis cylinder is fixed to be set up in the bottom of one of them L type slip table, and the length direction of major axis cylinder is parallel with the guide bar, the output of major axis cylinder is fixed connection with one side of center block, the major.

As a preferred proposal of the automatic welding equipment for the large-span straight-through cable bridge, each pressing mechanism comprises a short-shaft cylinder, a backup pad and two sets of subassemblies that push down, the backup pad is the horizontality setting, the minor axis cylinder is vertical state and sets up in the middle part below of backup pad, two sets of subassemblies symmetry that push down set up in the both ends of backup pad, the below of backup pad still is equipped with a transverse connection pole, the length direction of transverse connection pole is unanimous with the length direction of backup pad, the minor axis cylinder is fixed to be set up in the mesa bottom of roll-over table, transverse connection pole is located on the mesa of roll-over table, the output shaft of minor axis cylinder pass the workstation of roll-over table and with transverse connection pole's middle part fixed connection, transverse connection pole's both ends are connected with two subassemblies that push down respectively, the both ends bottom of backup pad all is equipped with vertical downwardly extending.

As a preferred scheme of automatic welding equipment of a large-span straight-through cable bridge, each group of downward-pressing components comprises a horizontal warping rod and two pressing claws, the two pressing claws are symmetrically arranged at two ends of the horizontal warping rod, a transverse connecting rod is perpendicular to the horizontal warping rod, two ends of the transverse connecting rod are respectively fixedly connected with the middle parts of the two horizontal warping rods, each pressing claw comprises a lower connecting rod, a vertical shaft and an upper connecting rod, the upper connecting rod and the lower connecting rod are transversely arranged, the vertical shaft is positioned between the upper connecting rod and the lower connecting rod, the upper end and the lower end of the vertical shaft are respectively hinged with the same end of the upper connecting rod and the lower connecting rod, the middle parts of the upper connecting rod and the lower connecting rod are respectively provided with a fixed shaft, a plurality of hinged supports for fixed shaft connection are arranged on a table board of a turnover table, a pressing plate horizontally extending to the edge of a supporting plate is arranged at the free end of the, the both ends of level stick up the pole all are equipped with the holding tank that is used for holding this pointed end portion.

As a preferred scheme of the automatic welding equipment for the large-span straight-through cable bridge, the edge clamping piece is of a transverse U-shaped plate structure, and a downward locking bolt is inserted into the top of the edge clamping piece.

As an optimal scheme of automatic welding equipment for a large-span straight-through cable bridge, the traveling mechanism comprises a sliding seat, a linear slideway, a driving motor and a threaded rod, the length direction of the linear slideway is the same as that of the overturning platform, the sliding seat is arranged at the top of the linear slideway in a sliding manner, the driving motor is transversely arranged at one end of the linear slideway, the threaded rod is horizontally arranged at the top of the linear slideway and is fixedly connected with one end of the threaded rod and an output shaft of the driving motor, two ends of the threaded rod are connected with the top of the linear slideway through shaft seats, and the threaded rod transversely penetrates through the sliding seat and is in threaded.

The utility model has the advantages that: the cable testing bridge comprises two girders and a plurality of corbel, the equal fixed centre gripping of girder and corbel of this equipment, automatic weld is carried out to rethread welding robot, equipment during operation, remove two girders and place in the long bracket on the roll-over table through equipment such as workshop gallows, the workman places a plurality of corbel in proper order in the inboard of two girders after that, and every corbel all places corresponding hold down mechanism in, fixed the holding up of corbel through hold down mechanism, drive two long brackets through tightening up mechanism and remove in opposite directions until making two girders support the both ends of corbel each other tightly, last workman will a plurality of edge chucking spare with girder and long bracket chucking, move along the length direction of roll-over table through driving welding robot, thereby make welding robot weld all corbels on the girder in proper order. The utility model discloses a straight type cable testing bridge automatic weld equipment of big span can make things convenient for quick to carry out the centre gripping to large-scale cable testing bridge fixed, through the upset platform of the welding robot cooperation small amplitude reversal that can remove, has realized the quick and efficient automatic weld to large-scale cable testing bridge.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial three-dimensional structure diagram of the present invention.

Fig. 3 is an exploded view of the partial three-dimensional structure of the present invention.

Fig. 4 is a schematic perspective view of the positioning and clamping tool.

Fig. 5 is an exploded perspective view of the positioning and clamping tool.

Fig. 6 is a plan view of the pressing mechanism.

Fig. 7 is a plan view of the pressing mechanism.

Fig. 8 is a perspective view of the tightening mechanism.

Fig. 9 is a schematic plan view of the tightening mechanism.

Figure 10 is a perspective view of the edge retainer.

In the figure: the welding robot comprises a turnover table 1, a welding robot 2, a positioning and clamping tool 3, a long bracket 4, a tightening mechanism 5, a pressing mechanism 6, an edge clamping piece 7, a sliding block 8, a linear sliding rail 9, a central block 10, a guide rod 11, an L-shaped sliding table 12, a fixed frame 13, a long-axis cylinder 14, a diamond shifting plate 15, a pull rod 16, a thickened hinged seat 17, a short-axis cylinder 18, a supporting plate 19, a transverse connecting rod 20, a threaded column 21, a nut 22, a horizontal tilting rod 23, a lower connecting rod 24, a vertical shaft 25, an upper connecting rod 26, a fixed shaft 27, a hinged seat 28, a pressing plate 29, a tip part 30, a containing groove 31, a locking bolt 32, a sliding seat 33, a linear sliding rail 34, a driving motor 35, a threaded rod 36, a shaft seat 37, a cable.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 10, an automatic welding device for a large-span straight-through cable bridge comprises a turnover table 1, a welding robot 2, and a positioning and clamping tool 3 arranged on a working table of the turnover table 1, wherein the welding robot 2 is arranged beside the turnover table 1 through a walking mechanism, and running gear's output direction is unanimous with the length direction of roll-over table 1, location centre gripping frock 3 includes two long brackets 4, a plurality of tightening mechanism 5 and a plurality of hold-down mechanism 6, all tightening mechanism 5 set up on roll-over table 1 along the length direction evenly distributed of roll-over table 1, two long brackets 4 are parallel to each other and length direction is unanimous with the length direction of roll-over table 1, all hold-down mechanism 6 all are located between two long brackets 4, all hold-down mechanism 6 all distribute along the length direction of roll-over table 1 equidistant, the inboard lower extreme of every long bracket 4 all is provided with a plurality of edge chucking spare 7. The cable bridge frame 38 consists of two main beams 39 and a plurality of supporting beams 40, the purpose of the equipment is to fixedly clamp the main beams 39 and the supporting beams 40, then the welding robot 2 carries out automatic welding, when the equipment works, the two main beams 39 are moved and placed on the long brackets 4 on the overturning platform 1 through equipment such as a workshop hanger and the like, the worker then places several support beams 40, one after the other, inside the two main beams 39, and each support beam 40 is placed on a respective hold-down mechanism 6, the supporting beam 40 is fixed and clamped through the pressing mechanism 6, the two long brackets 4 are driven to move oppositely through the tightening mechanism 5 until the two main beams 39 are mutually abutted against the two ends of the supporting beam 40, finally, a worker tightly clamps the main beams 39 and the long brackets 4 through a plurality of edge clamping pieces 7, the welding robot 2 is driven to move along the length direction of the overturning platform 1, so that the welding robot 2 sequentially welds all the supporting beams 40 on the main beam 39.

The cross sectional shape of long bracket 4 is "L" type to the minor face of long bracket 4 is the horizontality and long limit is vertical state, and the both ends bottom of every long bracket 4 all is provided with two sliders 8 symmetrically, and the workstation both ends top of roll-over table 1 all is equipped with linear slide rail 9, and linear slide rail 9's length direction perpendicular to roll-over table 1's length direction, two sliders 8 of long bracket 4 bottom respectively with two linear slide rail 9 sliding connection. After the two main beams 39 are sequentially placed on the two long brackets 4 by the hanging bracket, all the supporting beams 40 are sequentially placed on the corresponding pressing mechanisms 6 by manual work to complete positioning, then the tightening mechanisms 5 act to enable the two long brackets 4 to approach each other relatively on the linear slide rails 9 through the sliders 8 at the bottoms until the two main beams 39 jointly abut against all the supporting beams 40 tightly, and then the pressing mechanisms 6 act to fix and hold all the supporting beams 40 firmly.

The quantity of tightening mechanism 5 is three groups and sets up respectively in the both ends and the middle part of roll-over table 1, every tightening mechanism 5 of group all includes center block 10, two guide bars 11 and two sets of symmetry set up in the L type slip table 12 of center block 10 both sides, two guide bars 11 are parallel to each other and the length direction of equal perpendicular to long bracket 4, two guide bars 11 pass the both ends of center block 10 respectively, the middle part of two guide bars 11 is located to center block 10 mount 13, the fixed mount 13 that is provided with a plurality of and is used for supplying guide bar 11 end fixed connection in roll-over table 1's mesa both sides, do not slip cap is equallyd divide to the bottom of two L type sliding sleeves and locates on two guide bars 11, establish by being used for ordering about the actuating mechanism that two L type sliding sleeves moved in opposite directions in. The tightening mechanism 5 acts, the driving mechanism drives the two L-shaped sliding tables 12 to move on the guide rods 11 in the opposite direction, so that the two sliding tables are close to each other until the two sliding tables are contacted with the middle supporting beam 40, the upper half parts of the L-shaped sliding tables 12 are fixedly connected with the outer sides of the long brackets 4, the two long brackets 4 move along with the movement of the L-shaped sliding tables 12, the guide rods 11 of the three tightening mechanisms 5 are connected with the fixed frame 13, and the fixed frame 13 is fixedly connected with the overturning platform 1, so that the tightening mechanisms 5 are fixedly arranged on the overturning platform 1, and during actual processing, the overturning platform 1 rotates in a small range, and the situation that the tightening mechanisms 5 and the main beams 39 slide off the overturning platform 1 is avoided.

The driving mechanism comprises a long axis cylinder 14, a rhombic shifting plate 15 and two pull rods 16, the rhombic shifting plate 15 is positioned at the bottom of the central block 10, the center of the rhombic shifting plate 15 is in shaft connection with the center of the central block 10, one ends of the two pull rods 16 are in shaft connection with the bottoms of the two ends of the rhombic shifting plate 15 in the length direction respectively, the other ends of the two pull rods 16 are in shaft connection with the bottoms of the two L-shaped sliding tables 12 respectively, thickened hinge seats 17 for shaft connection of the pull rods 16 are fixedly arranged at the bottoms of the mutually close ends of the two L-shaped sliding tables 12, the long axis cylinder 14 is fixedly arranged at the bottom of one of the L-shaped sliding tables 12, the length direction of the long axis cylinder 14 is parallel to the guide rod 11, the output end of the long axis cylinder 14 is fixedly connected with one side of the central block 10, and the long axis cylinder 14 is positioned. The output end of the long axis cylinder 14 is recovered, because the output end of the long axis cylinder is fixedly connected with the central block 10, and the cylinder body of the long axis cylinder is fixedly connected with the bottom of the L-shaped sliding table 12, along with the recovery of the output end of the long axis cylinder 14, the cylinder body of the long axis cylinder can pull the L-shaped sliding table 12 to advance towards the central block 10 on the guide rod 11, and because the L-shaped sliding table 12 is close to the central block 10, the corresponding pull rod 16 can push the rhombic shifting plate 15 to rotate anticlockwise as shown in fig. 9, and therefore, in the process that the rhombic shifting plate 15 rotates anticlockwise, the other pull rod 16 can pull the other L-shaped sliding table 12 to the central block 10, so that the long axis cylinder 14 drives the two L.

Each hold-down mechanism 6 includes a stub shaft cylinder 18, a backup pad 19 and two sets of subassemblies that push down, backup pad 19 is the horizontality setting, minor axis cylinder 18 is vertical state and sets up in the middle part below of backup pad 19, two sets of subassemblies symmetry that push down set up in the both ends of backup pad 19, the below of backup pad 19 still is equipped with a transverse connection pole 20, the length direction of transverse connection pole 20 is unanimous with the length direction of backup pad 19, minor axis cylinder 18 is fixed to be set up in the mesa bottom of roll-over table 1, transverse connection pole 20 is located on the mesa of roll-over table 1, the output shaft of minor axis cylinder 18 passes the workstation of roll-over table 1 and with transverse connection pole 20's middle part fixed connection, transverse connection pole 20's both ends are connected with two subassemblies that push down respectively, the both ends bottom of backup pad 19 all is equipped with vertical downwardly extending's screw post 21, every screw post 21 all. A worker places the support beam 40 on the top of the support plate 19 of the pressing mechanism 6, the width of the support plate 19 is equal to that of the support beam 40, then the pressing mechanism 6 acts, the output shaft of the short shaft cylinder 18 retracts downwards, the output shaft of the short shaft cylinder 18 pulls the transverse connecting rod 20 downwards, and therefore the two pressing mechanisms are pulled downwards through the transverse connecting rod 20 to press the support beam 40 on the top of the support plate 19.

Each group of downward pressing components comprises a horizontal warping rod 23 and two pressing claws, the two pressing claws are symmetrically arranged at two ends of the horizontal warping rod 23, the horizontal connecting rod 20 is perpendicular to the horizontal warping rod 23, two ends of the horizontal connecting rod 20 are respectively fixedly connected with the middle parts of the two horizontal warping rods 23, each pressing claw comprises a lower connecting rod 24, a vertical shaft 25 and an upper connecting rod 26, the upper connecting rod 26 and the lower connecting rod 24 are transversely arranged, the vertical shaft 25 is positioned between the upper connecting rod 26 and the lower connecting rod 24, the upper end and the lower end of the vertical shaft 25 are respectively hinged with the same end of the upper connecting rod 26 and the same end of the lower connecting rod 24, the middle parts of the upper connecting rod 26 and the lower connecting rod 24 are respectively provided with a fixed shaft 27, a plurality of hinged seats 28 used for connecting the fixed shafts 27 are arranged on the table board of the overturning platform 1, the free end of the upper connecting rod 26 is provided with a section of a pressing plate 29 horizontally extending to, both ends of the horizontal seesaw bar 23 are provided with receiving grooves 31 for receiving the tip portions 30. As shown in fig. 7, during the process of pulling down the transverse tie bar 16, the end of the transverse tie bar 16 is wrapped by the end of the receiving groove 31, so as to press down the free end of the lower tie bar 24, and then the outer end of the lower tie bar 24 is moved up, and then the lower tie bar 24 pushes up the vertical shaft 25, and the outer end of the upper tie bar 26 is pushed up by the upper end of the vertical shaft 25, so that the free end of the upper tie bar 26 is lowered until the pressing plate 29 at the end of the upper tie bar 26 presses down the edge of the support beam 40, and finally the two pressing plates 29 press the support beam 40 down on the support plate 19.

The edge retainer 7 is a transverse U-shaped plate structure, and a downward locking bolt 32 is inserted at the top of the edge retainer 7. The supporting beam 40 is arranged on the long bracket 4, in order to prevent the overturning platform 1 from rotating slightly, the main beam 39 falls down from the long bracket 4, so the bottom edge of the main beam 39 is clamped with the bottom edge of the long bracket 4 through a plurality of edge clamping pieces 7, and then the main beam is further fixed through the screwing locking bolt 32.

The traveling mechanism comprises a sliding seat 33, a linear slideway 34, a driving motor 35 and a threaded rod 36, the length direction of the linear slideway 34 is the same as that of the overturning platform 1, the sliding seat 33 is arranged at the top of the linear slideway 34 in a sliding manner, the driving motor 35 is transversely arranged at one end of the linear slideway 34, the threaded rod 36 is horizontally arranged at the top of the linear slideway 34 and one end of the threaded rod is fixedly connected with an output shaft of the driving motor 35, two ends of the threaded rod 36 are connected with the top of the linear slideway 34 through a shaft seat 37, and the threaded rod 36 transversely penetrates through the sliding seat 33 and is in threaded connection with the sliding. The driving motor 35 runs to drive the threaded rod 36 to rotate, the threaded rod 36 rotates to drive the sliding seat 33 in threaded connection with the threaded rod to move transversely along the linear slideway 34, and finally the welding robot 2 is driven to move through the movement of the sliding seat 33, so that the welding robot 2 finishes the welding between the support beam 40 and the main beam 39 one by one.

The working principle is as follows: the cable bridge frame 38 consists of two main beams 39 and a plurality of supporting beams 40, the purpose of the equipment is to fixedly clamp the main beams 39 and the supporting beams 40, then the welding robot 2 carries out automatic welding, when the equipment works, the two main beams 39 are moved and placed on the long brackets 4 on the overturning platform 1 through equipment such as a workshop hanger and the like, the worker then places several support beams 40, one after the other, inside the two main beams 39, and each support beam 40 is placed on a respective hold-down mechanism 6, the supporting beam 40 is fixed and clamped through the pressing mechanism 6, the two long brackets 4 are driven to move oppositely through the tightening mechanism 5 until the two main beams 39 are mutually abutted against the two ends of the supporting beam 40, finally, a worker tightly clamps the main beams 39 and the long brackets 4 through a plurality of edge clamping pieces 7, the welding robot 2 is driven to move along the length direction of the overturning platform 1, so that the welding robot 2 sequentially welds all the supporting beams 40 on the main beam 39. In the whole process, after the two main beams 39 are sequentially placed on the two long brackets 4 by the hanging bracket, all the supporting beams 40 are sequentially placed on the corresponding pressing mechanisms 6 by manual work to complete positioning, then the tightening mechanisms 5 act to enable the two long brackets 4 to approach towards each other on the linear slide rails 9 through the sliding blocks 8 at the bottoms until the two main beams 39 jointly support all the supporting beams 40 tightly, and then the pressing mechanisms 6 act to fix and hold all the supporting beams 40 firmly. The tightening mechanism 5 is actuated, the output end of the long axis cylinder 14 is retracted, the output end of the long axis cylinder is fixedly connected with the central block 10, and the cylinder body of the long axis cylinder is fixedly connected with the bottom of the L-shaped sliding table 12, so that the cylinder body of the long axis cylinder 14 pulls the L-shaped sliding table 12 to advance towards the central block 10 on the guide rod 11 along with the retraction of the output end of the long axis cylinder 14, and the corresponding pull rod 16 pushes the rhombic shifting plate 15 to rotate anticlockwise as shown in fig. 9 in the process that the L-shaped sliding table 12 approaches the central block 10, so that the other pull rod 16 pulls the other L-shaped sliding table 12 towards the central block 10 in the process that the long axis cylinder 14 drives the two L-shaped sliding tables 12 to move towards each other, the two L-shaped sliding tables approach each other until the two L-shaped sliding tables contact with the middle supporting beam 40, the upper half parts of the L-shaped sliding tables 12 are fixedly connected with the outer sides of the, the guide rods 11 of the three tightening mechanisms 5 are all connected with the fixed frame 13, and the fixed frame 13 is fixedly connected with the overturning platform 1, so that the tightening mechanisms 5 are fixedly arranged on the overturning platform 1, and during actual processing, the overturning platform 1 rotates slightly, and the situation that the tightening mechanisms 5 and the main beams 39 slide off the overturning platform 1 is avoided. A worker places the support beam 40 on the top of the support plate 19 of the pressing mechanism 6, the width of the support plate 19 is equal to that of the support beam 40, then the pressing mechanism 6 acts, the output shaft of the short-shaft cylinder 18 retracts downwards, the output shaft of the short-shaft cylinder 18 pulls the transverse connecting rod 20 downwards, as shown in fig. 7, in the process that the transverse pull rod 16 is pulled downwards, the accommodating groove 31 at the end part of the transverse pull rod wraps the tip part 30 of the lower connecting rod 24, so that the free end of the lower connecting rod 24 is pressed downwards, the outer end of the lower connecting rod 24 is moved upwards, the lower connecting rod 24 pushes the vertical shaft 25 upwards, the outer end of the upper connecting rod 26 is pushed upwards through the upper end of the vertical shaft 25, the free end of the upper connecting rod 26 is lowered until the pressing plate 29 at the end part of the upper connecting rod 26 presses the edge of the support beam 40 downwards, and finally the support. The supporting beam 40 is arranged on the long bracket 4, in order to prevent the overturning platform 1 from rotating slightly, the main beam 39 falls down from the long bracket 4, so the bottom edge of the main beam 39 is clamped with the bottom edge of the long bracket 4 through a plurality of edge clamping pieces 7, and then the main beam is further fixed through the screwing locking bolt 32. The driving motor 35 runs to drive the threaded rod 36 to rotate, the threaded rod 36 rotates to drive the sliding seat 33 in threaded connection with the threaded rod to move transversely along the linear slideway 34, and finally the welding robot 2 is driven to move through the movement of the sliding seat 33, so that the welding robot 2 finishes the welding between the support beam 40 and the main beam 39 one by one.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. An automatic welding device for a large-span straight-through type cable bridge comprises a turnover table (1) and a welding robot (2), and is characterized by further comprising a positioning and clamping tool (3) arranged on a workbench of the turnover table (1), wherein the welding robot (2) is arranged beside the turnover table (1) through a travelling mechanism, the output direction of the travelling mechanism is consistent with the length direction of the turnover table (1), the positioning and clamping tool (3) comprises two long brackets (4), a plurality of tightening mechanisms (5) and a plurality of pressing mechanisms (6), all the tightening mechanisms (5) are uniformly distributed on the turnover table (1) along the length direction of the turnover table (1), the two long brackets (4) are parallel to each other, the length direction is consistent with the length direction of the turnover table (1), and all the pressing mechanisms (6) are positioned between the two long brackets (4), all hold-down mechanism (6) all along the length direction of roll-over table (1) equidistant distribution, the inboard lower extreme of every long bracket (4) all is provided with a plurality of edge chucking spare (7).

2. The automatic welding equipment for the large-span straight-through type cable bridge stand according to claim 1, wherein the cross section of the long bracket (4) is L-shaped, the short side of the long bracket (4) is in a horizontal state, the long side of the long bracket (4) is in a vertical state, two sliding blocks (8) are symmetrically arranged at the bottoms of the two ends of each long bracket (4), linear sliding rails (9) are arranged at the tops of the two ends of the workbench of the turnover table (1), the length direction of each linear sliding rail (9) is perpendicular to the length direction of the turnover table (1), and the two sliding blocks (8) at the bottom of the long bracket (4) are respectively connected with the two linear sliding rails (9) in a sliding manner.

3. The automatic welding equipment for the large-span straight-through type cable bridge frame according to claim 2, wherein the number of the tightening mechanisms (5) is three, the tightening mechanisms are respectively arranged at two ends and the middle part of the overturning platform (1), each tightening mechanism (5) comprises a central block (10), two guide rods (11) and two groups of L-shaped sliding tables (12) symmetrically arranged at two sides of the central block (10), the two guide rods (11) are parallel to each other and are perpendicular to the length direction of the long bracket (4), the two guide rods (11) respectively penetrate through two ends of the central block (10), a fixing frame (13) of the central block (10) is arranged at the middle part of the two guide rods (11), a plurality of fixing frames (13) for fixedly connecting the end parts of the guide rods (11) are fixedly arranged at two sides of the table top of the overturning platform (1), the bottoms of the two L-shaped sliding sleeves are respectively sleeved on the two guide rods (11) in a sliding manner, the bottom of the central block (10) is provided with a driving mechanism for driving the two L-shaped sliding sleeves to move oppositely.

4. The automatic welding equipment for the large-span straight-through type cable bridge stand according to claim 3, wherein the driving mechanism comprises a long axis cylinder (14), a diamond shifting plate (15) and two pull rods (16), the diamond shifting plate (15) is positioned at the bottom of the central block (10), the center of the diamond shifting plate (15) is in shaft connection with the center of the central block (10), one end of each of the two pull rods (16) is in shaft connection with the bottom of each of two ends of the diamond shifting plate (15) in the length direction, the other end of each of the two pull rods (16) is in shaft connection with the bottom of each of two L-shaped sliding tables (12), thickened hinge seats (17) for shaft connection of the pull rods (16) are fixedly arranged at the bottoms of the mutually close ends of the two L-shaped sliding tables (12), the long axis cylinder (14) is fixedly arranged at the bottom of one of the L-shaped sliding tables (12), and the long axis cylinder (14) is parallel to the guide rods (11), the output end of the long shaft cylinder (14) is fixedly connected with one side of the central block (10), and the long shaft cylinder (14) is positioned at the side of the corresponding thickening hinge seat (17).

5. The automatic welding equipment for the large-span straight-through type cable bridge stand according to claim 1, wherein each pressing mechanism (6) comprises a short-axis cylinder (18), a supporting plate (19) and two groups of pressing components, the supporting plate (19) is arranged in a horizontal state, the short-axis cylinder (18) is arranged below the middle part of the supporting plate (19) in a vertical state, the two groups of pressing components are symmetrically arranged at two ends of the supporting plate (19), a transverse connecting rod (20) is further arranged below the supporting plate (19), the length direction of the transverse connecting rod (20) is consistent with that of the supporting plate (19), the short-axis cylinder (18) is fixedly arranged at the bottom of the table top of the overturning table (1), the transverse connecting rod (20) is positioned above the table top of the overturning table (1), an output shaft of the short-axis cylinder (18) penetrates through a workbench of the overturning table (1) and is fixedly connected with the middle part of the transverse connecting rod (20, the both ends of transverse connection pole (20) are connected with two push down subassemblies respectively, and the both ends bottom of backup pad (19) all is equipped with vertical downwardly extending's screw thread post (21), and every screw thread post (21) all is through two upper and lower nut (22) fastening connection on transverse connection pole (20).

6. The automatic welding equipment for the large-span straight-through type cable bridge stand according to claim 5, wherein each group of the pressing assemblies comprises a horizontal tilted rod (23) and two pressing claws, the two pressing claws are symmetrically arranged at two ends of the horizontal tilted rod (23), the transverse connecting rod (20) is perpendicular to the horizontal tilted rod (23), two ends of the transverse connecting rod (20) are fixedly connected with the middle parts of the two horizontal tilted rods (23), each pressing claw comprises a lower connecting rod (24), a vertical shaft (25) and an upper connecting rod (26), the upper connecting rod (26) and the lower connecting rod (24) are transversely arranged, the vertical shaft (25) is positioned between the upper connecting rod (26) and the lower connecting rod (24), the upper end and the lower end of the vertical shaft (25) are hinged with the same end of the upper connecting rod (26) and the lower connecting rod (24), the middle parts of the upper connecting rod (26) and the lower connecting rod (24) are provided with fixed shafts (27), the table top of the overturning table (1) is provided with a plurality of hinged supports (28) used for connecting fixed shafts (27), the free end of the upper connecting rod (26) is provided with a section of pressing plate (29) horizontally extending to the position right above the edge of the supporting plate (19), the free end of the lower connecting rod (24) is provided with a section of tip part (30), and the two ends of the horizontal tilting rod (23) are provided with accommodating grooves (31) used for accommodating the tip part (30).

7. The automatic welding equipment for the large-span straight-through type cable tray according to the claim 1 is characterized in that the edge clamping piece (7) is a transverse U-shaped plate structure, and a downward locking bolt (32) is inserted at the top of the edge clamping piece (7).

8. The automatic welding equipment for the large-span straight-through type cable bridge stand according to claim 1, wherein the traveling mechanism comprises a sliding seat (33), a linear slideway (34), a driving motor (35) and a threaded rod (36), the length direction of the linear slideway (34) is the same as that of the overturning platform (1), the sliding seat (33) is arranged at the top of the linear slideway (34) in a sliding manner, the driving motor (35) is transversely arranged at one end of the linear slideway (34), the threaded rod (36) is horizontally arranged at the top of the linear slideway (34) and one end of the threaded rod is fixedly connected with an output shaft of the driving motor (35), two ends of the threaded rod (36) are connected with the top of the linear slideway (34) through a shaft seat (37), and the threaded rod (36) transversely penetrates through the sliding seat (33) and is in threaded connection with the sliding seat (33.