CN217991373U

CN217991373U - Welding device for jointed boards of carriage bottom board of mining dump truck

Info

Publication number: CN217991373U
Application number: CN202221509633.1U
Authority: CN
Inventors: 张殿平; 卓仁俊; 马春辉; 郭少磊
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-12-09
Anticipated expiration: 2032-06-16

Abstract

The utility model discloses a welding device for jointed boards of a carriage bottom plate of a mining dump truck, which comprises a workbench, wherein the middle part of the workbench is provided with a welding groove, and the two ends of the workbench are arranged on a turnover positioner; the lower part of the workbench is provided with a supporting plate, the supporting plate is provided with a plurality of pressing devices, each pressing device comprises a vertical plate arranged on the upper part of the supporting plate, one side of the middle part of each vertical plate is hinged with a pressing cylinder, and the upper part of a piston rod of each pressing cylinder is hinged with a pressing arm; a set of portal frames is arranged on each of the two sides of the workbench, a cantilever beam is arranged on the upper portion of each portal frame, an automatic welding machine is arranged at one end of each cantilever beam, and a welding manipulator is slidably mounted on each cantilever beam. The utility model discloses utilize closing device to fix two steel sheets of treating welding on the workstation, utilize the upset machine of shifting to shift the steel sheet and carry out two-sided double arc bottoming welding to vertical state, warp when reducing the makeup welding, avoid the back chipping, utilize two welding machines hand capping weld in addition, improve welding efficiency by a wide margin, reduce the production beat, guarantee welding quality.

Description

Welding device for jointed boards of carriage bottom plate of mining dump truck

Technical Field

The utility model belongs to steel sheet makeup welding field, in particular to mining dump truck platform floor makeup welding set.

Background

The width of the carriage bottom plate of the mining dump truck of more than 60 tons is 3m and more, and the thickness is 12-18mm. The widths of commercially purchased steel plates are less than 3m, so that the required width of the bottom plate is achieved by welding the spliced plates. The most widely adopted welding process in the industry at present is a manual MAG process, two steel plates for splicing are provided with K-shaped or V-shaped grooves, and manual tack welding, backing (back gouging) welding and cover surface welding are carried out. The welding process has large welding amount, requires a plurality of welders to weld simultaneously, and has high labor intensity. Deformation is easy to occur, correction is not easy, and welding quality is limited by unstable skill level of a welder. And before welding one side to the reverse side, the root of the finished welding seam is cleaned (back chipping) from the reverse side by using a proper tool, so that the welding efficiency of the carriage bottom plate is influenced.

Disclosure of Invention

The utility model aims at overcoming not enough among the prior art, the utility model provides a mining dump truck platform floor makeup welding set is provided, the welder intensity of labour who leads to greatly with the welding volume that solves traditional artifical MAG welding makeup existence is big, welding deformation is wayward, the unstable problem of welding quality, utilize two-sided double arc process control welding deformation and promote backing weld welding efficiency, utilize two welding machines hand mariages capping welding, realize the high-efficient welding of capping, utilize the upset machine of shifting, guarantee the best welding position of welding machines hand, thereby guarantee welding quality's stability.

In order to realize the purpose, the utility model discloses a technical scheme is:

a welding device for jointed boards of a carriage bottom plate of a mining dump truck comprises a workbench, wherein a welding groove is formed in the middle of the workbench, two ends of the workbench are installed on an overturning positioner, the overturning positioner is a commercially available mature product, for example, a single-shaft overturning positioner for a welding workstation disclosed by the publication No. CN213257784U, and the structure of the single-shaft overturning positioner is not detailed; the lower part of the workbench is provided with a supporting plate, the supporting plate is provided with a plurality of pressing devices, the pressing devices are arranged on the front side, the rear side and the right side of the workbench, each pressing device comprises a vertical plate arranged on the upper part of the supporting plate, one side of the middle part of each vertical plate is hinged with a pressing cylinder, the upper part of a piston rod of each pressing cylinder is hinged with a pressing arm, and the middle part of each pressing arm is hinged with the upper end of each vertical plate; the utility model discloses a welding machine, including workstation, portal frame, cantilever beam, automatic welding machine, welding manipulator, automatic welding machine and welding manipulator, the workstation both sides respectively are equipped with a set of portal frame, and portal frame upper portion is equipped with the cantilever beam, cantilever beam one end is equipped with automatic welding machine, and slidable mounting has welding manipulator on the cantilever beam, and automatic welding machine and welding manipulator all adopt current ripe product, and its structure no longer details.

Furthermore, a plurality of positioning columns are arranged on the left side of the workbench, centering mechanisms are arranged on the front side, the rear side and the right side of the workbench respectively, each centering mechanism comprises a centering cylinder, and a push plate is arranged at the tail end of a piston rod of each centering cylinder; the centering mechanisms on the front side and the rear side push the steel plate to center towards the middle of the workbench, the centering mechanism on the right side pushes the steel plate to the left side, and after the left side of the steel plate is abutted to the positioning column, positioning of the steel plate is completed.

Furthermore, two ends of the welding groove are respectively provided with a group of floating positioning mechanisms, each floating positioning mechanism comprises a positioning cylinder fixedly arranged on the inner wall of the welding groove, and the tail end of a piston rod of each positioning cylinder is provided with a positioning block; before two steel sheets, the piston rod of the positioning cylinder extends out, so that the positioning block is positioned between the two steel sheets, after the steel sheets are positioned, the pressing machine device compresses the steel sheets, the piston rod of the positioning cylinder is retracted, and the positioning accuracy of the steel sheets is guaranteed.

Furthermore, the shape of the positioning block is matched with the shape of the end grooves of the two steel plates to be welded, so that the positioning accuracy of the steel plates is further ensured.

Furthermore, a plurality of longitudinal carrier rollers and transverse carrier rollers are arranged on the workbench, the longitudinal carrier rollers and the transverse carrier rollers are vertically arranged, the longitudinal carrier rollers and the transverse carrier rollers are identical in structure, and the longitudinal carrier rollers and the transverse carrier rollers are used for supporting the steel plate when the steel plate is centered, so that friction force of the steel plate during centering is reduced, and meanwhile scratching of the steel plate during centering is avoided.

Furthermore, lifting cylinders are arranged on the lower portions of the longitudinal carrier rollers and the lower portions of the transverse carrier rollers, the lower ends of the lifting cylinders are installed on the supporting plate, when the steel plate is centered front and back, the lifting cylinders of the longitudinal carrier rollers extend out, the upper ends of the longitudinal carrier rollers are higher than the table top of the workbench, when the steel plate is centered left and right, the lifting cylinders of the longitudinal carrier rollers retract, the lifting cylinders of the transverse carrier rollers extend out, the upper ends of the transverse carrier rollers are higher than the table top of the workbench, after the steel plate is positioned, the lifting cylinders of the transverse carrier rollers retract, the lower surface of the steel plate is placed on the workbench, and the steel plate is prevented from being deformed when the pressing device presses the steel plate.

The beneficial effects of the utility model are that:

1) The utility model discloses utilize closing device to fix two steel sheets of treating welding on the workstation, utilize the upset machine of shifting to shift the steel sheet and carry out two-sided double arc bottoming welding to vertical state, warp when reducing the makeup welding, avoid the back chipping, utilize two welding machines hand capping weld in addition, improve welding efficiency by a wide margin, reduce the production beat, guarantee welding quality.

2) The centering mechanism is arranged on the workbench, the positioning column is arranged on one side of the workbench, the centering mechanism is used for pushing the steel plate, and the steel plate can be centered and positioned conveniently and rapidly.

3) Both ends of the welding groove are provided with floating positioning mechanisms, and the shapes of the positioning blocks of the floating positioning mechanisms are matched with the shapes of the end grooves of the two steel plates to be welded, so that the accuracy of steel plate positioning is ensured.

4) Vertical bearing roller and horizontal bearing roller that can go up and down have been set up on the workstation, and the steel sheet slides on the workstation when the steel sheet centering of being convenient for, has avoided the fish tail of steel sheet, and vertical bearing roller and horizontal bearing roller shrink back, the steel sheet tiling has guaranteed the tight stability of steel sheet clamp, has avoided the steel sheet to press from both sides deformation when tight simultaneously.

Drawings

Fig. 1 is a front view of the utility model discloses a mining dump truck platform floor makeup welding set.

Fig. 2 is the utility model discloses a mining dump truck platform floor makeup welding set top view.

Fig. 3 is the utility model discloses a steel sheet is placed on the workstation schematic diagram among mining dump truck platform floor makeup welding set.

FIG. 4 is a structural schematic diagram of a workbench in the welding device for jointed boards of a carriage bottom plate of a mining dump truck.

FIG. 5 is the utility model discloses a closing device and bearing roller assembly sketch map among mining dump truck platform floor makeup welding set.

Fig. 6 is the utility model discloses a steel sheet groove schematic diagram in mining dump truck platform floor makeup welding set.

Fig. 7 is a schematic structural view of a floating positioning mechanism in the welding device for the jointed boards of the carriage bottom board of the mining dump truck.

In the figure: 1. a gantry; 2. an automatic welding machine; 3. a cantilever beam; 4. welding a manipulator; 5. a centering mechanism; 51. centering the air cylinder; 52. pushing the plate; 6. a compressing device; 61. a vertical plate; 62. a pressing cylinder; 63. a pressing arm; 7. longitudinal carrier rollers; 71. a lifting cylinder; 8. a steel plate; 9. a work table; 91. a positioning column; 92. welding a groove; 93. a pallet; 10. turning over the positioner; 11. a floating positioning mechanism; 111. positioning the air cylinder; 112. positioning blocks; 12. and (7) transverse carrier rollers.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1-7, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, a particular orientation configuration, and operation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-5, the welding device for jointed boards of a carriage floor of a mining dump truck comprises a workbench 9, wherein a welding groove 92 is formed in the middle of the workbench 9, two ends of the workbench 9 are mounted on an overturning positioner 10, and the overturning positioner 10 is a commercially available mature product, for example, a single-shaft overturning positioner 10 for a welding workstation disclosed in CN213257784U, the structure of which is not described in detail; a supporting plate 93 is arranged at the lower part of the workbench 9, a plurality of pressing devices 6 are arranged on the supporting plate 93, the pressing devices 6 are arranged on the front side, the rear side and the right side of the workbench 9, each pressing device 6 comprises a vertical plate 61 arranged on the upper part of the supporting plate 93, a pressing cylinder 62 is hinged to one side of the middle part of each vertical plate 61, a pressing arm 63 is hinged to the upper part of a piston rod of each pressing cylinder 62, and the middle part of each pressing arm 63 is hinged to the upper end of each vertical plate 61; the utility model discloses a welding machine, including workstation 9, portal frame 3, cantilever beam 3, welding manipulator 4, automatic welding machine 2 and welding manipulator 4, the workstation respectively is equipped with a set of portal frame 1 in 9 both sides, and portal frame 1 upper portion is equipped with

cantilever beam

3, 3 one end of cantilever beam is equipped with automatic welding machine 2, and slidable mounting has welding manipulator 4 on the cantilever beam 3, and automatic welding machine 2 and welding manipulator 4 all adopt current ripe product, and its structure no longer details.

As shown in fig. 3-4, in this embodiment, a plurality of positioning columns 91 are disposed on the left side of the working table 9, centering mechanisms 5 are disposed on the front side, the rear side and the right side of the working table 9, each centering mechanism 5 includes a centering cylinder 51, and a push plate 52 is disposed at the end of a piston rod of the centering cylinder 51; the centering mechanisms 5 on the front side and the rear side push the steel plate 8 to the middle of the workbench 9 for centering, the centering mechanism 5 on the right side pushes the steel plate 8 to the left side, and after the left side of the steel plate 8 abuts against the positioning column 91, the positioning of the steel plate 8 is completed.

As shown in fig. 3-4 and 7, in this embodiment, a set of floating positioning mechanisms 11 is respectively disposed at two ends of the welding groove 92, the floating positioning mechanisms 11 include positioning cylinders 111 fixedly mounted on an inner wall of the welding groove 92, and a positioning block 112 is disposed at a tail end of a piston rod of the positioning cylinders 111; before two steel sheets 8, the piston rod of the positioning cylinder 111 extends out, so that the positioning block 112 is positioned between the two steel sheets 8, after the steel sheets 8 are positioned, the pressing machine device compresses the steel sheets 8, the piston rod of the positioning cylinder 111 is withdrawn again, and the positioning accuracy of the steel sheets 8 is ensured.

As shown in fig. 7, in this embodiment, the shape of the positioning block 112 is matched with the shape of the end bevels of the two steel plates 8 to be welded, so as to further ensure the positioning accuracy of the steel plates 8.

As shown in fig. 4 to 5, in this embodiment, a plurality of longitudinal idlers 7 and transverse idlers 12 are provided on the work table 9, the longitudinal idlers 7 and the transverse idlers 12 are arranged vertically, the longitudinal idlers 7 and the transverse idlers 12 have the same structure, and when the longitudinal idlers 7 and the transverse idlers 12 are used for centering the steel plate 8, the longitudinal idlers 7 and the transverse idlers 12 support the steel plate 8, so that not only is the friction force of the steel plate 8 during centering reduced, but also scratches of the steel plate 8 during centering are avoided.

As shown in fig. 5, in this embodiment, the lower portions of the longitudinal idler 7 and the transverse idler 12 are provided with a lifting cylinder 71, the lower end of the lifting cylinder 71 is mounted on a supporting plate 93, when the steel plate 8 is centered back and forth, the lifting cylinder 71 of the longitudinal idler 7 extends out, so that the upper end of the longitudinal idler 7 is higher than the table top of the workbench 9, when the steel plate 8 is centered left and right, the lifting cylinder 71 of the longitudinal idler 7 retracts, the lifting cylinder 71 of the transverse idler 12 extends out, so that the upper end of the transverse idler 12 is higher than the table top of the workbench 9, after the positioning of the steel plate 8 is completed, the lifting cylinder 71 of the transverse idler 12 retracts, so that the lower surface of the steel plate 8 is placed on the workbench 9, and the steel plate 8 is prevented from being deformed by pressing when the pressing device 6 presses the steel plate 8.

The technical process of welding the carriage floor comprises the following steps: to-be-welded workpiece feeding → automatic centering device centering → clamping → overturning edge changing machine shifts the steel plate 8 to a vertical state → double-sided double-arc bottoming welding → shifting machine shifts to a flat weld state → double-gun (double-wire) capping welding → overturning to the other side → double-gun (double-wire) capping welding → blanking, specifically:

(1) Feeding: the workbench 9 is in a horizontal state, and the two steel plates 8 are fed onto the workbench 9 in a feeding mode including but not limited to a traveling crane, a KBK, a half-gantry crane, a feeding manipulator, a feeding slide rail and the like.

In order to realize double-sided double-arc backing welding, the groove form of the two steel plates for splicing is shown in fig. 6, wherein the recommended process parameters are as follows: the range of the groove angle K1 is 0-15 degrees, the range of the groove angle K2 is 25-45 degrees, the range of the truncated edge L is 0-3mm, and the range of the assembly gap S is 0-4mm;

(2) After feeding, the centering mechanism 5 pushes the steel plate 8 to center. The number of the centering devices can be selected according to actual conditions. In order to ensure that the centering device smoothly pushes the steel plate 8 to center, a certain number of longitudinal supporting rollers 7 and transverse supporting rollers 12 are designed on the workbench 9.

(3) After centering, a clamping mechanism on the workbench 9 clamps the steel plate 8, servo, oil pressure or powerful pneumatic clamping can be selected for clamping, and the clamping device can also be designed independently of the centering device. The worktable 9 can be an electromagnetic or permanent magnetic device, which replaces or cooperates with the pressing device 6 to clamp and fix the steel plate 8. And after clamping, controlling the robot to tack the two steel plates 8 according to the requirement.

(4) After the centering clamping, the welding seams of the two steel plates 8 are positioned at the welding groove 92, the steel plates 8 are shifted to be in a vertical state (as shown in fig. 6, the K2 plate with a small groove degree is arranged below) through the overturning and shifting machine 10, the welding angles of the welding manipulators 4 on the two sides are adjusted, the two plates are subjected to plate splicing and backing welding, and the two welding manipulators 4 all adopt single-wire welding guns.

The recommended process parameters are as follows:

welding gas (80-82)% Ar + (18-20)% CO2;

the arc distance between the front arc and the back arc is 12-35mm;

welding speed (300-450) mm/min;

the angle of the welding gun is 0-25 degrees;

the welding mode adopts a pulse mode;

the current and voltage are selected according to the plate and welding materials and range from (170-280) A to (20-28) V.

(5) After backing welding is completed, the turning positioner 10 turns one side of the steel plate 8 to a horizontal state, wherein the welding manipulator 4 can consider to be provided with a single-wire and double-wire switching system and is switched to double wires (Tandem) for cover surface welding, and the welding efficiency is improved. After one side is welded, the other side is turned and shifted by the turning and shifting machine 10 to perform cover surface welding;

the recommended welding speed is (500-750) mm/min, the welding gas is (80-82)% Ar + (18-20)% CO2, and the welding current and voltage are selected according to the plate, the welding material and the condition of configuring a welding power supply.

The welded steel plate 8 is blanked by a blanking mode including but not limited to a travelling crane, KBK, a half gantry crane, a feeding manipulator, a feeding slide rail and the like, and a small amount of repair welding can be performed at the arc starting and receiving position by checking.

The foregoing is illustrative and explanatory only of the structure of the present invention, and it is intended that those skilled in the art who have the structure described herein be able to make various modifications, additions or substitutions in the same manner as the above-described embodiments without departing from the structure of the present invention or exceeding the scope defined by the claims.

Claims

1. A welding device for jointed boards of a carriage bottom plate of a mining dump truck comprises a workbench and is characterized in that a welding groove is formed in the middle of the workbench, and two ends of the workbench are installed on an overturning positioner; the lower part of the workbench is provided with a supporting plate, the supporting plate is provided with a plurality of pressing devices, the pressing devices are arranged on the front side, the rear side and the right side of the workbench, each pressing device comprises a vertical plate arranged on the upper part of the supporting plate, one side of the middle part of each vertical plate is hinged with a pressing cylinder, the upper part of a piston rod of each pressing cylinder is hinged with a pressing arm, and the middle part of each pressing arm is hinged with the upper end of each vertical plate; the automatic welding machine is characterized in that a group of portal frames are arranged on two sides of the workbench respectively, a cantilever beam is arranged on the upper portion of each portal frame, an automatic welding machine is arranged at one end of each cantilever beam, and a welding manipulator is slidably mounted on each cantilever beam.

2. The mining dump truck carriage floor panel welding device according to claim 1, wherein a plurality of positioning columns are arranged on the left side of the workbench, centering mechanisms are arranged on the front side, the rear side and the right side of the workbench, the centering mechanisms comprise centering cylinders, and push plates are arranged at the ends of piston rods of the centering cylinders.

3. The mining dump truck carriage floor panel welding device according to claim 2, wherein a set of floating positioning mechanisms is respectively arranged at two ends of the welding groove, the floating positioning mechanisms comprise positioning cylinders fixedly arranged on the inner wall of the welding groove, and positioning blocks are arranged at the tail ends of piston rods of the positioning cylinders.

4. The mining dump truck carriage floor panel welding device according to claim 3, wherein the shape of the positioning block is matched with the shape of the end grooves of the two steel plates to be welded.

5. The welding device for floor panels of carriages of mining dump trucks according to any one of claims 2 to 4, wherein a plurality of longitudinal idlers and transverse idlers are arranged on the working table, the longitudinal idlers and the transverse idlers are vertically arranged, and the longitudinal idlers and the transverse idlers have the same structure.

6. The mining dump truck carriage floor panel welding device according to claim 5, wherein the lower portions of the longitudinal idler and the transverse idler are provided with lifting cylinders, the lower ends of the lifting cylinders are mounted on the support plate, when the steel plate is centered back and forth, the lifting cylinders of the longitudinal idler extend out, so that the upper end of the longitudinal idler is higher than the table top of the workbench, when the steel plate is centered left and right, the lifting cylinders of the longitudinal idler are retracted, the lifting cylinders of the transverse idler extend out, so that the upper end of the transverse idler is higher than the table top of the workbench, and after the positioning of the steel plate is completed, the lifting cylinders of the transverse idler are retracted, so that the lower surface of the steel plate is placed on the workbench.