CN117655617A

CN117655617A - Multi-station welding device and method for production of movable arm of excavator

Info

Publication number: CN117655617A
Application number: CN202410128809.6A
Authority: CN
Inventors: 苑朝辉; 范文学; 张书深; 卢恩祥; 张建军; 费学华; 张学典; 刘立国
Original assignee: Dezhou Baoding Hydraulic Machinery Co ltd
Current assignee: Dezhou Baoding Hydraulic Machinery Co ltd
Priority date: 2024-01-31
Filing date: 2024-01-31
Publication date: 2024-03-08
Anticipated expiration: 2044-01-31
Also published as: CN117655617B

Abstract

The invention provides a multi-station welding device and method for the production of an excavator movable arm, and relates to the technical field of welding devices. Including the flexible landing leg of mirror image and equidistance distribution, mirror image and equidistance distribution the flexible end of flexible landing leg is the rigid coupling has the mount jointly, and wherein a set of mirror image distribution flexible landing leg rigid coupling has the thing board of putting, put the thing board be close to one side sliding connection of mount has the locating plate of mirror image distribution, the mirror image distribution the locating plate all is provided with displacement sensor, and the mirror image distribution the locating plate all moves through drive arrangement, the mount rigid coupling has the step motor of mirror image distribution. According to the invention, the displacement sensor on the positioning plate is used for detecting the moving distance of the positioning plate, the length of the sample is calculated, the worker sets the number of positioning welding points according to the length of the sample, the starting interval of the stepping motor is determined, and the distribution uniformity of positioning welding pieces on each large arm of the excavator is further controlled.

Description

Multi-station welding device and method for production of movable arm of excavator

Technical Field

The invention relates to the technical field of welding equipment, in particular to a multi-station welding device and method for producing a movable arm of an excavator.

Background

In the process of welding the large arm of the excavator, the large arm of the excavator needs to be subjected to positioning welding in advance, the accurate position of a welding line and the size of a welding line gap are ensured, the stability of the large arm of the excavator in the subsequent welding process is improved, at present, most of the large arm of the excavator is manually operated by workers, but the manual positioning welding is influenced by the technical level and experience of the welder, if the workers do not have enough working experience, the problems of positioning deviation and welding errors are easy to generate, uneven distribution of positioning points is caused, and the occurrence of deviation of the welding line position or uneven distribution of the welding line gap is caused in the subsequent welding process, so that the strength of the large arm of the excavator is influenced, and the service life of the large arm of the excavator is shortened.

Disclosure of Invention

The invention provides a multi-station welding device and method for the production of an excavator movable arm, which aims to overcome the defects that positioning deviation and welding error are easy to generate in manual positioning welding, so that positioning points are unevenly distributed, and the position of a welding line and the uniformity of a welding line gap are influenced in subsequent welding.

The technical scheme of the invention is as follows: the utility model provides a multistation welding set for excavator movable arm production, including the flexible landing leg that mirror image and equidistance distribute, mirror image and equidistance distribute the flexible end of flexible landing leg is the rigid coupling has the mount jointly, and one of them group mirror image distributes the flexible landing leg rigid coupling has puts the thing board, it is close to put the thing board one side sliding connection of mount has the locating plate that the mirror image distributes, and the mirror image distributes the locating plate all is provided with displacement sensor, and the mirror image distributes the locating plate all moves through drive arrangement, the mount rigid coupling has the step motor that the mirror image distributes, the mount rotates the threaded rod that is connected with the mirror image distribution, the mirror image distributes the threaded rod all with be provided with the driving medium between step motor's the output shaft, the threaded rod is close to one side threaded connection of mount has first connecting plate, the mount rigid coupling has the first gag lever post that the mirror image distributes, first connecting plate and mirror image distribution's one side sliding connection has the first fixed block that the mirror image distributes, and the first fixed block that the mirror image distributes all is provided with electric rod, the telescopic welder side has the telescopic link, the telescopic link is used for transporting the goods.

As a further preference, the fixing frame is internally provided with an L-shaped frame fixedly connected with one side of the object placing plate, the L-shaped frame is fixedly connected with the object placing plate, the L-shaped frame is adjacent to the L-shaped frame, the first limiting rod penetrates through the L-shaped frame, one side of the object placing plate is fixedly connected with a first electric push rod, the telescopic end of the first electric push rod is provided with a blind hole, a partition plate is fixedly connected in the blind hole of the telescopic end of the first electric push rod, one side of the partition plate is in sealing sliding connection with a first arc-shaped push plate, the first arc-shaped push plate is in sealing sliding connection in the blind hole of the telescopic end of the first electric push rod, the partition plate, the first arc-shaped push plate and the inner wall of the blind hole of the telescopic end of the first electric push rod are mutually matched to form a first cavity, the telescopic end of the first electric push rod is in the blind hole of the telescopic end of the first electric push rod, a first elastic piece is fixedly connected between the telescopic end of the first electric push rod, one side of the first movable rod is close to the first connecting rod, and the first arc-shaped push rod is far away from the first connecting rod.

As a further preference, one side of the first movable rod, which is close to the partition plate, is fixedly connected with an arc-shaped rod in mirror image distribution through a connecting piece, one side of the partition plate, which is close to the first movable rod, is hinged with a connecting column in mirror image distribution through a connecting piece, the connecting columns in mirror image distribution are all provided with guiding grooves, the arc-shaped rod slides in the guiding grooves of the adjacent connecting columns, one end of the connecting column, which is close to the first movable rod, is hinged with a first movable block through the connecting piece, the telescopic end of the first electric push rod is provided with a through groove which is communicated with a blind hole of the first movable block and in mirror image distribution, the through groove of the telescopic end of the first electric push rod is rotationally connected with a supporting column, and the supporting column is provided with a sliding groove which is in limiting sliding connection with the adjacent first movable block.

As a further preference, one side of the fixing frame far away from the object placing plate is fixedly connected with a fixing plate, one side of the fixing plate far away from the object placing plate is inlaid with a first liquid storage cylinder, the inside of the first liquid storage cylinder is hermetically and slidingly connected with a first pushing disc, the first liquid storage cylinder is fixedly connected with and communicated with a first connecting pipe, the first connecting pipe is communicated with a first cavity, the fixing plate is rotationally connected with a gear, the fixing frame is slidingly connected with a moving plate distributed in a mirror image manner, the moving plate distributed in a mirror image manner is slidingly connected with the first connecting plate distributed in a mirror image manner, the moving plate distributed in a mirror image manner is respectively and slidingly connected with adjacent first fixing blocks, racks meshed with the gear are fixedly connected with the moving plate in a mirror image manner, and one of the racks is fixedly connected with the first pushing disc.

As further preference, still including the stock solution pipe, the stock solution pipe pass through the connecting piece rigid coupling in the flexible end of first electric putter, the stock solution pipe be close to first electric putter's one end sliding connection has the second movable block, the second movable block is kept away from one side rigid coupling of first electric putter has the second connecting rod, the second connecting rod is kept away from first electric putter's one end rigid coupling has the second to push away the dish, the second push away the dish with stock solution pipe sealing sliding connection, the inside rigid coupling of stock solution pipe has the limiting plate, the second connecting rod runs through the limiting plate and rather than sealing sliding connection, the second push away the dish with the rigid coupling has the second elastic component between the limiting plate, the inner wall of stock solution pipe the second push away the dish with the limiting plate mutually support and form the second cavity, the opposite side sealing sliding connection of division board has the second arc push pedal, the first movable rod is close to one side rigid coupling of division board has the third connecting rod, the third connecting rod is kept away from one end of first movable rod and adjacent second arc push pedal, second arc push pedal and second arc connecting pipe and second connecting tube mutually support, second arc connecting tube and second arc connecting tube have the second arc connecting tube and second connecting tube mutually support.

As a further preference, the maximum volume of the second cavity is smaller than the maximum volume of the third cavity for ensuring that the distance between adjacent torches is adjustable.

As a further preference, the fixing frame is slidingly close to a second connecting plate in mirror image distribution on one side of the object placing plate, the second connecting plate in mirror image distribution is fixedly connected with the second connecting pipe through a connecting piece, the second connecting pipe is slidingly connected with a second moving rod in mirror image distribution, a second liquid storage barrel is inlaid on the second connecting plate in mirror image distribution, a moving cover is slidingly connected with one side, close to the second connecting pipe, of the second liquid storage barrel, the moving cover is fixedly connected with an adjacent second moving rod, the second liquid storage barrel is in sealing rotation connection with a sealing cover, a second limiting rod is fixedly connected with one side, close to the adjacent second moving rod, of the sealing cover, a blind hole in sliding fit with the second limiting rod is formed in the second moving rod, threads in sliding connection with the adjacent moving cover are formed in the second limiting rod, a connecting ring is fixedly connected with one side, far away from the adjacent moving cover, of the sealing cover, through the connecting ring is fixedly connected with, a fourth cavity is formed between the sealing cover and the second liquid storage barrel, and a through hole is formed in one side of the connecting ring.

As a further preference, the first connecting plate rigid coupling has the second fixed block, the first connecting plate is inlayed and is had hydraulic putter, hydraulic putter's flexible end rigid coupling has the third fixed block, the second fixed block be provided with third fixed block sliding fit's spout, the third fixed block with the rigid coupling has the spring between the second fixed block, the third fixed block with be adjacent the second connecting plate rigid coupling, first connecting plate has the second electric putter through the connecting piece rigid coupling, the second connecting plate be provided with adjacent second electric putter sliding fit's recess, the flexible end of second electric putter is provided with the blind hole, the rigid coupling has the seal tube in the blind hole of second electric putter flexible end, seal tube sealing sliding connection has the third movable rod, the first fixed block be provided with adjacent electric telescopic handle fixed part sliding fit's spout, the second connecting plate be provided with adjacent electric telescopic handle fixed part sliding fit's through-hole, the second connecting plate rigid coupling has the liquid reserve tank, the seal tube and intercommunication has the second electric putter's recess, the second connecting tube and the second connecting tube has the second connecting tube and runs through adjacent and runs through the second connecting tube and runs through the fifth connecting tube and is connected with the fourth connecting tube rigid coupling.

As a further preferred aspect, the through holes on the connection ring are diamond-shaped for changing the flow areas of the fourth connection pipe and the fifth connection pipe.

A multi-station welding method for the production of movable arms of an excavator based on the technical scheme comprises the following steps:

s1: when the device is used for carrying out positioning welding on the large arm of the excavator, a worker firstly completes the welding of one large arm of the excavator and places the large arm of the excavator on the upper side of the object placing plate to serve as a sample;

s2: the method comprises the steps that a worker starts an existing driving device through a control terminal to drive two positioning plates to move oppositely, the moving distance of the two positioning plates is respectively uploaded to the control terminal through displacement sensors on the two positioning plates, the length of a sample is calculated through the control terminal, and then the worker sets the number of positioning welding points through the control terminal according to the length of the sample;

s3: starting the first electric push rod, driving the first moving rod to synchronously move downwards by the telescopic end of the first electric push rod, and enabling the first moving rod to move upwards along a through hole on the telescopic end of the first electric push rod under the reverse acting force of the bottom of the sample after the bottommost end of the first moving rod is contacted with the lowest point of the arc-shaped part of the sample;

S4: the first moving rod moves upwards to extrude hydraulic oil in a cavity at the right side of the telescopic end of the first electric push rod into the first connecting pipe, so that the first push disc is driven to move rightwards along the first liquid storage barrel, and further, an adjacent group of first fixed blocks are driven to move synchronously, and the distance between the two groups of first fixed blocks is changed;

s5: the first moving rod drives the two support columns to rotate, the distance between the two side walls of the sample is detected by the two support columns, and meanwhile, the two groups of welding guns and the inner side of the large arm of the excavator to be welded are positioned on the same horizontal plane;

s6: the first connecting rod driven by the first moving rod synchronously conveys hydraulic oil in a cavity at the left side of the telescopic end of the first electric push rod into the second connecting pipe, the first electric push rod drives the liquid storage pipe to synchronously move downwards, the extruded hydraulic oil in the cavity at the telescopic end of the first electric push rod is pumped back into the liquid storage pipe, the thickness of the side wall of the sample is detected through the volume of the hydraulic oil in the cavity at the telescopic end of the first electric push rod remained in the second connecting pipe, and the moving speed of the welding gun is changed;

s7: after the position of the welding gun is adjusted, the control terminal starts the electric sliding block, the first large arm of the excavator to be welded is transported to a welding position, and then the control terminal starts the telescopic supporting leg to adjust the horizontal position of the fixing frame;

S8: after the position of the fixing frame is adjusted, the control terminal starts two stepping motors, the two stepping motors drive the welding gun after adjustment to move, meanwhile, the electric telescopic rod is started and drives the welding gun to synchronously move downwards, the required welded big arm of the excavator is welded, the front side welding gun welds the lowest point of the arc-shaped position of the big arm of the excavator until the required welded big arm of the excavator is welded in a fixed-position mode, the control terminal reversely starts the two stepping motors, resets the two groups of welding guns to the adjusted position, then the control terminal starts the electric sliding block, conveys the welded big arm of the excavator to the welding position, conveys the next big arm of the excavator to be welded to the welding position, and welds the next big arm of the excavator according to the steps.

The beneficial effects of the invention are as follows: according to the invention, the displacement sensor on the positioning plate is used for detecting the moving distance of the positioning plate, the length of the sample is calculated, the worker sets the number of positioning welding points according to the length of the sample, the starting interval of the stepping motor is determined, and the distribution uniformity of positioning welding pieces on each large arm of the excavator is further controlled.

The position of the welding gun is adjusted according to the distance between the left side wall and the right side wall of the sample, so that the welding gun and the inner side surface of the large arm of the excavator to be welded are positioned on the same horizontal plane, and the problems in the welding process are reduced.

Through the welder that mirror image distributes around setting up, to the juncture of the left and right sides of excavator big arm and bottom by the front and back both sides gradually weld to the middle part, reduce the influence of welding heat to the big arm to the deformation after the control welding reduces at welded stress concentration.

Through the detection to the sample lateral wall, change the speed that hydraulic push rod flexible end stretches out, and then change the speed that the back side welding gun moved forward, prevent when the material thickness that the big arm of excavator used is thinner, the time overlength of welder and the inboard contact of the big arm of excavator, cause welder to cause the damage to the inboard of the big arm of excavator, influence the normal use of the big arm of excavator.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of a stepper motor and threaded rod according to the present invention;

FIG. 3 is a schematic perspective view showing the mating relationship between a first connecting plate and a first fixing block according to the present invention;

fig. 4 is a schematic perspective view of an L-shaped frame and a first electric push rod according to the present invention;

FIG. 5 is a schematic perspective view illustrating a first electric putter and a first connecting tube according to the present invention;

fig. 6 is a schematic perspective view of an internal part of the telescopic end of the first electric putter according to the present invention;

FIG. 7 is a schematic perspective view of the first moving block and support column of the present invention;

FIG. 8 is a schematic perspective view of a first cartridge and a first pusher tray according to the present invention;

FIG. 9 is a schematic perspective view of the first fixed block and the moving plate in the mating relationship of the present invention;

FIG. 10 is a schematic perspective view showing the mating relationship between a second connecting pipe and a second connecting plate according to the present invention;

FIG. 11 is a schematic perspective view of the internal components of the liquid storage tube of the present invention;

FIG. 12 is a schematic perspective view of the mating relationship of the second connecting plate and the electric telescopic rod of the present invention;

FIG. 13 is a schematic perspective view showing the positional relationship between a second movable rod and a second liquid storage barrel according to the present invention;

fig. 14 is a schematic perspective view showing a mating relationship between a second electric putter and a sealing tube according to the present invention.

In the above figures: 1: telescoping leg, 2: fixing frame, 3: object placing plate, 4: locating plate, 5: step motor, 6: threaded rod, 7: first connection plate, 8: first gag lever post, 9: first fixed block, 10: electric telescopic rod, 21: l-shaped rack, 22: first electric putter, 23: division plate, 25: first arcuate push plate, 26: first movable lever, 261: first elastic member, 27: first connecting rod, 28: arc pole, 29: connection column, 290: first moving block, 291: support column, 31: fixing plate, 32: first reservoir, 33: first pushing disc, 331: first connecting tube, 34: gear, 35: moving plate, 36: rack, 41: liquid storage tube, 42: second movable block 421: second connecting rod, 43: second pushing disc, 44: limiting plate, 45: second elastic member 451: second arcuate push plate, 452: third connecting rod, 46: second connecting tube, 47: second connection plate, 48: second movable lever, 49: second reservoir, 490: moving the lid, 4901: second stop lever, 491: sealing cover, 492: connection ring, 51: second fixed block, 52: hydraulic pushrod, 53: third fixed block, 54: second electric putter, 55: sealing tube, 56: third movable lever, 57: third connecting tube, 58: fourth connecting tube, 59: and a fifth connecting pipe.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Example 1: 1-3, including mirror image and equidistant four flexible landing legs 1 that distribute, two flexible landing legs 1 that are left and right homonymy set up into a set of, flexible end common rigid coupling of four flexible landing legs 1 has mount 2, one side of mount 2 is detachably connected with control terminal (not shown in the figure), four flexible landing legs 1 all are connected with control terminal electricity, change the horizontal height of mount 2 and other parts that connect on it by four flexible landing legs 1 mutually supporting mutually, a set of flexible landing legs 1 on the left side is jointly fixedly connected with thing board 3, thing board 3 is used for placing the sample that has welded, the front and back both sides of thing board 3 all sliding connection has locating plate 4, the locating plate 4 of mirror image distribution cooperates with the sample that places on thing board 3, all be provided with the displacement detector who is connected with the control terminal electricity on two locating plate 4, detect the front and back length of sample, two locating plate 4 all move through current drive arrangement, the drive arrangement is motor, the gear train and gear train 2 and the threaded rod 6 are connected with the threaded rod 6 through the opposite to each other to the first and second and opposite direction drive shaft 6, the threaded rod 6 is connected with the threaded rod 6 through the opposite direction connection, the threaded rod 6 is connected with the threaded rod 6 respectively to the first and the threaded rod 6 through the opposite connection, the threaded rod 6 is connected to the threaded rod 6 respectively, the mount 2 rigid coupling has two first gag lever posts 8 that are the mirror image formula distribution about, two first connecting plates 7 all with mirror image distribution's first gag lever post 8 sliding connection, it is spacing to two first connecting plates 7 to mutually support by two first gag lever posts 8, prevent when threaded rod 6 drives adjacent first connecting plate 7 and remove, first connecting plate 7 rotates along with adjacent threaded rod 6 circumference, the equal sliding connection in right side of two first connecting plates 7 has two first fixed blocks 9 that are the mirror image formula distribution about, control two first fixed blocks 9 of homonymy set up into a set of, the downside of every first fixed block 9 all is provided with electric telescopic handle 10, electric telescopic handle 10 and control terminal electricity are connected, the flexible end of every electric telescopic handle 10 all has welder through the connecting piece rigid coupling, control two electric telescopic handle 10 of homonymy set up into a set of, drive adjacent two welding guns that drive adjacent through adjacent first fixed block 9 and electric telescopic handle 10 by first connecting plate 7 and electric telescopic handle 10 and drive, carry out vertical position adjustment welding gun, it carries out the adjustment welder to carry out the horizontal adjustment welding gun under the mount 2 to the electric position.

As shown in fig. 1 and fig. 4-6, an L-shaped frame 21 is fixedly connected to the left side inside the fixing frame 2, the L-shaped frame 21 is fixedly connected with the object placing plate 3 and used for increasing the supporting force of the object placing plate 3, the L-shaped frame 21 is penetrated by an adjacent first limiting rod 8, a first electric push rod 22 is fixedly connected to the lower side of the horizontal position of the L-shaped frame 21, the first electric push rod 22 is electrically connected with a control terminal, a blind hole is arranged at the telescopic end of the first electric push rod 22, a partition plate 23 is fixedly connected in the blind hole at the telescopic end of the first electric push rod 22, a first arc push plate 25 is connected in a sealing sliding manner to the front side of the partition plate 23, the first arc push plate 25 and the inner wall of the blind hole at the telescopic end of the first electric push rod 22 are mutually matched to form a first cavity, hydraulic oil is filled in the first cavity, a first moving rod 26 is connected in a limiting sliding manner in the blind hole at the telescopic end of the first electric push rod 22, a first elastic piece 261 is fixedly connected between the first moving rod 26 and the telescopic end of the first electric push rod 22, the first elastic piece 261 is a tension spring, the tension of the first elastic piece 261 is larger than the sum of the weights of the first moving rod 26 and other parts connected with the first moving rod 26, the first elastic piece 261 is used for maintaining the initial position of the first moving rod 26 and the other parts connected with the first moving rod, the first moving rod 26 and the other parts connected with the first moving rod are driven to reset to the initial position, two first connecting rods 27 which are in front-back mirror image distribution are fixedly connected at the upper ends of the first moving rod 26 through connecting pieces, the upper ends of the two first connecting rods 27 are fixedly connected with adjacent first arc push plates 25 respectively, the first moving rod 26 drives the two first connecting rods 27 to move upwards, and further drives the two first arc push plates 25 to synchronously move upwards, the hydraulic oil in the cavity of the telescopic end of the first electric push rod 22 is extruded outwards.

As shown in fig. 6 and 7, the upper end of the first moving rod 26 is fixedly connected with two arc rods 28 distributed in a left-right mirror image manner through a connecting piece, the lower side of the partition plate 23 is hinged with two connecting columns 29 distributed in a left-right mirror image manner through a connecting piece, the two connecting columns 29 are respectively provided with guide grooves matched with the adjacent arc rods 28, the distance between the two connecting columns 29 and the center of the partition plate 23 is gradually increased from top to bottom, the first moving rod 26 drives the two arc rods 28 to move upwards, the two connecting columns 29 are further driven to gradually and circumferentially stretch out, the lower ends of the two connecting columns 29 are hinged with a first moving block 290 through the connecting piece, the telescopic end of the first electric push rod 22 is provided with two through grooves communicated with blind holes of the two through grooves distributed in a left-right mirror image manner, the through grooves of the telescopic end of the first electric push rod 22 are rotationally connected with a supporting column 291, the support column 291 upside rotates with the logical groove of the flexible end of first electric putter 22 to be connected, the support column 291 is provided with the spout that limit sliding connects with adjacent first movable block 290, when first movable rod 26 drives two spliced poles 29 circumference and opens, two spliced poles 29 drive adjacent first movable block 290 respectively and remove in step, in order to change the horizontal height and the vertical position of two first movable blocks 290, and then drive adjacent support column 291 by first movable block 290 and rotate around its connecting axle with the flexible end of first electric putter 22 in step, make the synchronous circumference of downside of two support columns 291 open, spout on the support column 291 and first movable block 290 all set up to the T type, prevent that support column 291 from opening the back unable reset under the drive of adjacent first movable block 290.

As shown in fig. 4, 8 and 9, the upper side of the fixing frame 2 is fixedly connected with a fixing plate 31, the upper side of the fixing plate 31 is embedded with a first liquid storage barrel 32, the interior of the first liquid storage barrel 32 is in sealed sliding connection with a first push disc 33, a gap is reserved between the first push disc 33 and the first liquid storage barrel 32, hydraulic oil is filled in the gap between the first push disc 33 and the first liquid storage barrel 32, the first liquid storage barrel 32 is fixedly connected and communicated with a first connecting pipe 331, the first connecting pipe 331 is positioned at the left side of the first push disc 33, a first cavity of the first connecting pipe 331 is communicated, the hydraulic oil in the front cavity of the telescopic end of the first electric push rod 22 is conveyed into the gap between the first push disc 33 and the first liquid storage barrel 32 by the first connecting pipe 331, and then the first push disc 33 is driven to move rightwards, the right part of the upper side of the fixed plate 31 is rotationally connected with a gear 34, the right side of the fixed frame 2 is rotationally connected with two moving plates 35 which are distributed in a left-right mirror image mode, the two moving plates 35 are all in sliding connection with two first connecting plates 7, the two moving plates 35 are respectively in sliding connection with adjacent first fixed blocks 9, the two moving plates 35 are fixedly connected with racks 36 meshed with the gear 34, the two racks 36 are distributed in a central symmetry mode around the rotation center of the gear 34, the racks 36 on the rear side are fixedly connected with a first pushing disc 33, the racks 36 on the rear side are driven by the first pushing disc 33 to move rightwards, the racks 36 on the front side are driven by the transmission of the gear 34 to synchronously move rightwards, and then an adjacent group of first fixed blocks 9 are driven to synchronously move, and the distance between two groups of welding guns is changed.

When the device is used for carrying out tack welding on the large arm of the excavator, a worker firstly completes welding on one large arm of the excavator (the welded large arm of the excavator is replaced by a sample), and the large arm of the excavator is placed on the upper side of the object placing plate 3 and used as the sample, the worker needs to adjust the vertical position of the center of the lowest point of the arc-shaped part of the sample to the position which is positioned on the same straight line with the center of the circle of the first movable rod 26 in the process of placing the sample, then the worker starts the existing driving device through the control terminal to synchronously move the two positioning plates 4 towards the direction close to the sample until the front side and the rear side of the two positioning plates 4 are respectively attached to the front side and the rear side of the sample, and the worker closes the driving device through the control terminal.

When the operator starts the existing driving device through the control terminal, the operator starts the two stepping motors 5 through the control terminal, the output shafts of the two stepping motors 5 drive the adjacent threaded rods 6 to synchronously rotate through the transmission of the gear set, the two threaded rods 6 drive the two first connecting plates 7 to approach each other until the two positioning plates 4 are contacted with the front side and the rear side of the sample, and the operator closes the driving device through the control terminal and simultaneously closes the two stepping motors 5, and at the moment, the position where the two first connecting plates 7 are located is the initial position in the normal working process of the device.

In the process of approaching the two first connecting plates 7, the first connecting plates 7 (for example, the first connecting plates 7 on the front side move backwards) move backwards to drive the two first fixing blocks 9 on the first connecting plates to synchronously move backwards, the two first fixing blocks 9 synchronously drive the adjacent electric telescopic rods 10 to move backwards, and then the electric telescopic rods 10 drive the adjacent welding guns to move backwards, so that the initial positions of the two groups of welding guns are changed.

In the moving process of the two positioning plates 4, the displacement sensors on the two positioning plates 4 upload the moving distance of the two positioning plates 4 to the control terminal respectively, the control terminal calculates the distance between the two positioning plates 4, the length of the sample is calculated, then the staff can set the number of positioning welding points through the control terminal according to the length of the sample, the control terminal determines the starting interval of the stepping motor 5 according to the length of the sample and the number of the positioning welding points, and then the uniformity of distribution of the positioning welding pieces on the large arm of each excavator is controlled.

After the starting interval of the stepping motor 5 is set by the control terminal, a worker starts the first electric push rod 22 through the control terminal, the telescopic end of the first electric push rod 22 drives the first moving rod 26 to synchronously move downwards, after the lowest point of the arc-shaped part of the sample is contacted with the lowest point of the lowermost end of the first moving rod 26, at the moment, in the process that the telescopic end of the first electric push rod 22 continuously moves downwards, the first moving rod 26 moves upwards along the through hole on the telescopic end of the first electric push rod 22 under the reverse acting force of the bottom of the sample, and stretches and stores the first elastic piece 261, the first moving rod 26 moves upwards to drive the first connecting rod 27 to synchronously move upwards, the first connecting rod 27 drives the first arc-shaped push plate 25 to synchronously move upwards, the hydraulic oil in the first cavity is extruded into the first connecting pipe 331, the hydraulic oil conveyed into the first connecting pipe 331 is transmitted into the first liquid storage barrel 32, the first push disc 33 is driven to move rightwards along the first liquid storage barrel 32, the first push disc 33 drives the racks 36 on the rear side to move rightwards synchronously, the racks 36 on the rear side are driven by the gears 34 to move leftwards synchronously through meshing with the gears 34, the two racks 36 respectively drive the adjacent moving plates 35 to move synchronously in the moving process, the two moving plates 35 respectively drive the adjacent first fixed blocks 9 to move synchronously, the distance between the two first fixed blocks 9 is changed, and the distance between the two welding guns is changed.

In the process of moving the first moving rod 26 upwards, the first moving rod 26 drives the two arc rods 28 to synchronously move upwards in the guide grooves of the adjacent connecting columns 29, and gradually moves upwards along with the two arc rods 28, so that the two connecting columns 29 gradually rotate around the connecting shafts at the upper ends of the two connecting columns 29, further the lower ends of the two connecting columns 29 are mutually far away, in the process of moving the two connecting columns 29, the horizontal positions of the lower ends of the two connecting columns 29 are gradually raised, simultaneously, the two connecting columns 29 respectively drive the adjacent first moving blocks 290 to synchronously move upwards, the two first moving blocks 290 respectively slide in the T-shaped grooves of the adjacent supporting columns 291, further the two supporting columns 291 respectively rotate around the rotating shafts between the connecting columns and the telescopic end through grooves of the adjacent first electric push rods 22, make the lower extreme of two support columns 291 keep away from dorsad, make the horizontal position of support column 291 lower extreme promote gradually simultaneously, until after the lower extreme of two support columns 291 all laminates with the inner wall of sample, two support columns 291 carry out spacingly to two arc poles 28 this moment, and then carry out spacingly to first movable rod 26, make it unable to continue to upwards move, and then carry out spacingly to the flexible end of first electric putter 22, even the flexible end of first electric putter 22 no longer continues to stretch out downwards, two sets of welder synchronization stop remove simultaneously, so that two sets of welder are in same vertical plane with the inboard of the big arm of the excavator that will weld, reduce the problem that appears in the welding process.

After the positions of the two groups of welding guns are adjusted, the control terminal starts the electric sliding rail, the electric sliding block on the electric sliding rail conveys the first large arm of the excavator to be welded to a welding position (a position which is flush with a sample), then the control terminal starts the four telescopic support legs 1, the telescopic ends of the telescopic support legs 1 are matched together and the horizontal position of the fixing frame 2 is adjusted, and the welding gun is ensured to be movable to a position matched with the large arm of the excavator to be welded in the welding process.

After the position of the fixing frame 2 is adjusted, the control terminal stops four telescopic support legs 1 and simultaneously starts two groups of electric telescopic rods 10, so that two groups of welding guns synchronously move downwards, and simultaneously starts two stepping motors 5, the two groups of welding guns after adjustment are jointly driven by the two stepping motors 5 to move towards opposite sides (the specific moving process can be referred to above), the two groups of welding guns synchronously weld the large arms of the excavator to be welded, the welding sequence is gradually moved towards the middle part from front and back sides, during the welding process, the two welding guns at the front side weld the lowest point of the arc-shaped part of the large arms of the excavator, after the welding of the lowest point of the arc-shaped part of the large arms of the excavator is finished by the welding gun at the front side, the stepping motor 5 at the front side stops working, the step motor 5 on the rear side continues to work, through setting up the welder that front and back mirror image distributes, the juncture of left and right sides and bottom to the big arm of excavator is synchronous to the middle part step by step welding from front and back both sides, reduce the influence of welding heat to the big arm, thereby control the deformation after the welding, reduce at welded stress concentration, after the big arm of the excavator that needs to weld accomplishes the fixed-position welding, control terminal reverse start two step motor 5, reset two sets of welder to the position of being adjusted, control terminal start electric slide block afterwards, transport the big arm of the excavator that will weld when accomplishing to the next working position to the welding position, and weld it according to above-mentioned step.

Example 2: on the basis of embodiment 1, as shown in fig. 4, 5 and 11, the device further comprises a liquid storage tube 41, the liquid storage tube 41 is fixedly connected to the telescopic end of the first electric push rod 22 through a connecting piece, the right end of the liquid storage tube 41 is slidably connected with a second moving block 42, an inclined surface is arranged at the right part of the second moving block 42, the second moving block 42 is leftwards moved by the extrusion force of the left side wall of a sample in the process that the telescopic end of the first electric push rod 22 drives the second moving block 42 to downwards move through the liquid storage tube 41, a second connecting rod 421 is fixedly connected to the left end of the second moving block 42, a second pushing disc 43 is fixedly connected to the left end of the second connecting rod 421, the second pushing disc 43 is in sealing sliding connection with the liquid storage tube 41, a limiting plate 44 is fixedly connected to the inside of the liquid storage tube 41, the second connecting rod 421 penetrates through the limiting plate 44 and is in sealing sliding connection with the limiting plate 44, a second elastic piece 45 is fixedly connected between the second pushing disc 43 and the limiting plate 44, the second elastic member 45 is a tension spring, the inner wall of the liquid storage tube 41, the second pushing disc 43 and the limiting plate 44 are matched with each other to form a second cavity, the rear side of the partition plate 23 is connected with a second arc push plate 451 in a sealing sliding manner, one side of the first moving rod 26 close to the partition plate 23 is fixedly connected with a third connecting rod 452, one end of the third connecting rod 452 far away from the first moving rod 26 is fixedly connected with an adjacent second arc push plate 451, the partition plate 23 and the inner wall of a blind hole at the telescopic end of the first electric push rod 22 are matched with each other to form a third cavity, the liquid storage tube 41 is fixedly connected and communicated with a second connecting tube 46, the second connecting tube 46 is communicated with the third cavity, the second connecting tube 46 is a four-way tube, the first moving rod 26 drives other parts connected with the first moving rod 26 to extrude hydraulic oil in the third cavity into the second connecting tube 46, the second pushing disc 43 is synchronously driven to move leftwards by the second moving block 42 through the second connecting rod 421, the hydraulic oil extruded in the third cavity is pumped back into the second cavity, and the maximum volume of the second cavity is smaller than that of the third cavity, so that the distance between adjacent welding guns is adjustable.

As shown in fig. 10 and 12-14, two second connecting plates 47 distributed in a front-back mirror image are slidingly connected to the lower side of the fixing frame 2, the two second connecting plates 47 are fixedly connected with two ends of the horizontal part of the second connecting pipe 46 through connecting pieces, the second connecting pipe 46 is slidingly connected with two second moving rods 48 distributed in a front-back mirror image, the two second moving rods 48 are driven by hydraulic oil in the second connecting pipe 46 to move back, the two second connecting plates 47 are embedded with second liquid storage cylinders 49, the opposite sides of the two second liquid storage cylinders 49 are slidingly connected with moving covers 490, the two moving covers 490 are fixedly connected with the adjacent second moving rods 48 respectively, the two second moving rods 48 respectively drive the adjacent moving covers 490 to synchronously move, the two second liquid storage cylinders 49 are hermetically and rotatably connected with sealing covers 491, one side of each sealing cover 491 close to the adjacent second moving rod 48 is fixedly connected with a second limiting rod 4901, the two second movable rods 48 are respectively provided with blind holes which are in sliding fit with the adjacent second movable rods 4901, the second movable rods 4901 are provided with threads which are in sliding connection with the adjacent movable covers 490, in the process that the two movable covers 490 move back to each other, the threads on the second movable rods 4901 can only be driven by the movable covers 490 to rotate 90 degrees, the adjacent second movable rods 4901 are driven by the movable covers 490 to synchronously rotate, and then the adjacent sealing covers 491 are driven to synchronously rotate, simultaneously the two second movable rods 4901 are respectively inserted into the blind holes of the adjacent second movable rods 48, one sides of the two sealing covers 491, which are far away from the adjacent movable covers 490, are respectively fixedly connected with a connecting ring 492 through connecting pieces, a fourth cavity is formed between the sealing covers 491 and the adjacent second liquid storage cylinders 49, hydraulic oil is filled in the fourth cavity, the left side of the connecting ring 492 is provided with a through hole, the movable cover 490 drives the adjacent sealing cover 491 and the connecting ring 492 to rotate, thereby changing the position of the left through hole of the connecting ring 492.

As shown in fig. 13 and 14, the two first connecting plates 7 are fixedly connected with the second fixing block 51, the two first connecting plates 7 are embedded with the hydraulic push rods 52, the telescopic ends of the two hydraulic push rods 52 are fixedly connected with the third fixing block 53, the two second fixing blocks 51 are respectively provided with sliding grooves which are in sliding fit with the adjacent third fixing blocks 53, springs for maintaining the initial positions of the fixing blocks 53 and other parts connected thereto and driving the moving fixing blocks 53 to move towards the initial positions are fixedly connected between the third fixing blocks 53 and the second fixing blocks 51, the telescopic ends of the two hydraulic push rods 52 respectively drive the adjacent third fixing blocks 53 to slide in the sliding grooves of the adjacent second fixing blocks 51, the two third fixing blocks 53 are respectively fixedly connected with the adjacent second connecting plates 47, the telescopic ends of the two hydraulic push rods 52 respectively drive the adjacent second connecting plates 47 and other parts connected thereto to move synchronously, the two first fixing blocks 9 are fixedly connected with second electric push rods 54 through connecting pieces, the second electric push rods 54 are electrically connected with control terminals, two second connecting plates 47 are respectively provided with grooves which are in sliding fit with the adjacent second electric push rods 54, the telescopic ends of the two second electric push rods 54 are respectively provided with blind holes, sealing pipes 55 are fixedly connected in the blind holes of the telescopic ends of the two second electric push rods 54, the two sealing pipes 55 are respectively in sealing sliding connection with a third moving rod 56, the two first fixing blocks 9 are respectively provided with sliding grooves which are in sliding fit with the fixing parts of the adjacent electric telescopic rods 10, the two second connecting plates 47 are respectively provided with through holes which are in sliding fit with the fixing parts of the adjacent electric telescopic rods 10, the electric telescopic rods 10 are used for moving left and right, the upper sides of the two second connecting plates 47 are respectively fixedly connected with a liquid storage tank, the seal pipes 55 and the blind holes at the telescopic ends of the adjacent second electric push rods 54 are matched with each other to form a fifth cavity, hydraulic oil is filled in the fifth cavity, the two seal pipes 55 are fixedly connected and communicated with a third connecting pipe 57, the two third connecting pipes 57 respectively penetrate through the adjacent second connecting plates 47 and are communicated with the adjacent second liquid storage cylinders 49, the seal pipes 55 are pressed by the bottom of a sample to move upwards, the hydraulic oil in the fifth cavity is extruded into the second liquid storage cylinders 49, the two second liquid storage cylinders 49 are fixedly connected and communicated with a fourth connecting pipe 58, the two fourth connecting pipes 58 respectively penetrate through the adjacent first fixed blocks 9 and are communicated with the fixed parts of the adjacent hydraulic push rods 52, the two second liquid storage cylinders 49 are fixedly connected and communicated with a fifth connecting pipe 59, the two fifth connecting pipes 59 are respectively communicated with the adjacent liquid storage tanks, the third connecting pipe 57, the fourth connecting pipe 58 and the fifth connecting pipe 59 are all flexible pipes, the two connecting rings 492 are respectively matched with the adjacent fourth connecting pipe 58 and the adjacent fifth connecting pipe 59, the hydraulic oil extruded in the fifth cavity is conveyed to the adjacent fourth connecting pipe 58 and the adjacent fifth connecting pipe 59 by the second liquid storage cylinder 49, the telescopic end of the adjacent hydraulic push rod 52 is driven to extend outwards, through holes on the connecting rings 492 are diamond-shaped, the shielding area of the connecting rings 492 to the adjacent fourth connecting pipe 58 and the adjacent fifth connecting pipe 59 is changed by changing the positions of diamond-shaped through holes on the left side of the connecting rings 492, the flow area of the adjacent fourth connecting pipe 58 and the adjacent fifth connecting pipe 59 is further changed, the proportion of the hydraulic oil conveyed to the adjacent fourth connecting pipe 58 and the adjacent fifth connecting pipe 59 is adjusted, and the speed of the telescopic end of the adjacent hydraulic push rod 52 extending outwards is changed.

In the process of performing the fixed-position welding on the inner side of the large arm of the excavator (the description is made by taking the movement of the welding gun on the rear side as an example), the control terminal starts the two electric telescopic rods 10 on the rear side and simultaneously starts the second electric push rod 54, the telescopic end of the second electric push rod 54 drives the sealing tube 55 to synchronously move downwards, the sealing tube 55 drives the third moving rod 56 to synchronously move downwards until the lower end of the third moving rod 56 moves to the position contacting the upper side of the bottom of the rear side of the sample, the two welding guns on the rear side respectively contact with the junction between the left side and the right side of the large arm of the excavator and the bottom, the two welding guns on the rear side perform the fixed-position welding on the rear part of the large arm of the excavator, at this time, the third moving rod 56 continuously moves downwards and upwards by the unidirectional extrusion force of the upper side of the bottom of the sample, so as to synchronously convey the hydraulic oil in the fifth cavity and the sealing tube 55 to the adjacent third connecting tube 57, and the third connecting pipe 57 conveys hydraulic oil to the adjacent second liquid storage barrel 49, the second liquid storage barrel 49 conveys hydraulic oil to the adjacent fourth connecting pipe 58 and the adjacent fifth connecting pipe 59, the fourth connecting pipe 58 conveys hydraulic oil to the fixed part of the adjacent hydraulic push rod 52, the telescopic end of the adjacent hydraulic push rod 52 is driven to move forwards, the telescopic end of the hydraulic push rod 52 drives the adjacent third fixed block 53 to move forwards synchronously, the third fixed block 53 drives the adjacent second connecting plate 47 to move forwards synchronously, the second connecting plate 47 moves forwards to drive the adjacent two electric telescopic rods 10 to move forwards synchronously, the two welding guns on the rear side are driven to move forwards synchronously, the time that the welding guns are contacted with one point on the inner side of the big arm of the excavator is overlong when the big arm of the excavator is positioned and welded is prevented, damage is caused to the inner side of the large arm of the excavator.

In the welding process, the device can control the moving speed of the welding gun according to the thickness of the material used by the large arm of the excavator, and the specific process is as follows: in the process of moving the telescopic end of the first electric push rod 22 downward, the first moving rod 26 drives the third connecting rod 452 to convey the hydraulic oil in the third cavity in the second connecting pipe 46 (the specific process refers to the moving process of the first connecting rod 27), and the telescopic end of the first electric push rod 22 drives the liquid storage pipe 41 to move downward synchronously through the connecting piece, the liquid storage pipe 41 drives other parts connected with the liquid storage pipe 41 to move downward synchronously, in the process of moving the liquid storage pipe 41 downward, the upper top edge of the left outer wall of the sample is matched with the inclined surface on the right side of the second moving block 42, the left outer wall of the sample presses the inclined surface on the right side of the second moving block 42, so that the second moving block 42 is moved rightward by the pressing force, the second connecting rod 421 and the second push plate 43 are driven by the second moving block 42 to move rightward synchronously, meanwhile, the second elastic piece 45 is stretched by the second push plate 43 in the moving process, and the hydraulic oil extruded in the third cavity is returned to the second cavity in the rightward moving process of the second push plate 43.

After the hydraulic oil in the left cavity of the telescopic end of the first electric push rod 22 is extruded into the second connecting pipe 46, the volume of the hydraulic oil stored in the second connecting pipe 46 is increased, so that the second moving rods 48 at two ends of the second connecting pipe are moved back by extrusion force, the moving distance of the second moving rods 48 is the thickness of the side wall of the sample, in the moving process of the two second moving rods 48 (described by way of example by the moving of the second moving rods 48 at the rear side), the second moving rods 48 move backwards to drive the adjacent moving covers 490 to synchronously move backwards, the moving covers 490 drive the second limiting rods 4901 to synchronously rotate circumferentially, the second limiting rods 4901 drive the sealing covers 491 to rotate, the sealing covers 491 drive the connecting rings 492 to synchronously rotate, the positions of diamond-shaped through holes on the connecting rings 492 are changed, the shielding degree of the adjacent fourth connecting pipes 58 and the adjacent fifth connecting pipes 59 is changed, the proportion of the flexible ends of the rear side hydraulic push rods 52 is changed, the forward extending speeds of the two front moving arms are changed, and the large-side material of the large-size excavator arm is prevented from being damaged when the large-size excavator arm is used, and the large-size excavator is prevented from being damaged due to the long-time.

And resetting the device to the adjusted position by the control terminal according to the operation after the welding of the large arm of the excavator is completed, so as to meet the next large arm of the excavator to be welded.

Example 3: on the basis of embodiment 2, as shown in fig. 1-14, a multi-station welding method for the production of an excavator movable arm, based on the above technical scheme, comprises the following steps:

s1: when the device is used for carrying out positioning welding on the large arm of the excavator, a worker firstly completes the welding of one large arm of the excavator and places the large arm of the excavator on the upper side of the object placing plate 3 to serve as a sample;

s2: the method comprises the steps that a worker starts an existing driving device through a control terminal to drive two positioning plates 4 to move oppositely, displacement sensors on the two positioning plates 4 upload the moving distances of the two positioning plates 4 to the control terminal respectively, the control terminal calculates the length of a sample, and then the worker sets the number of positioning welding points through the control terminal according to the length of the sample;

s3: starting the first electric push rod 22, driving the first moving rod 26 to synchronously move downwards by the telescopic end of the first electric push rod 22, and after the lowest end of the first moving rod 26 contacts with the lowest point of the arc-shaped part of the sample, moving the first moving rod 26 upwards along a through hole on the telescopic end of the first electric push rod 22 under the reverse acting force of the bottom of the sample;

S4: the first moving rod 26 moves upwards to squeeze hydraulic oil in a right cavity of the telescopic end of the first electric push rod 22 into the first connecting pipe 331, so that the first push disc 33 is driven to move rightwards along the first liquid storage barrel 32, and further, an adjacent group of first fixed blocks 9 are driven to move synchronously, and the distance between the two groups of first fixed blocks 9 is changed;

s5: the first moving rod 26 drives the two support columns 291 to rotate, the distance between the two side walls of the sample is detected by the two support columns 291, and meanwhile, the two groups of welding guns and the inner side of the large arm of the excavator to be welded are positioned on the same horizontal plane;

s6: the first connecting rod 27 driven by the first moving rod 26 conveys hydraulic oil in a cavity at the left side of the telescopic end of the first electric push rod 22 in synchronization with the second connecting pipe 46, the first electric push rod 22 drives the liquid storage pipe 41 to move downwards in synchronization, the extruded hydraulic oil in the cavity at the telescopic end of the first electric push rod 22 is pumped back into the liquid storage pipe 41, the thickness of the side wall of a sample is detected through the volume of the hydraulic oil in the cavity at the telescopic end of the first electric push rod 22 remained in the second connecting pipe 46, and the moving speed of a welding gun is changed;

s7: after the position of the welding gun is adjusted, the control terminal starts the electric sliding block, the first large arm of the excavator to be welded is transported to a welding position, and then the control terminal starts the telescopic supporting leg 1 to adjust the horizontal position of the fixing frame 2;

S8: after the position of the fixing frame 2 is adjusted, the control terminal starts two stepping motors 5, the two stepping motors 5 drive the adjusted welding guns to move, meanwhile, the electric telescopic rod 10 is started and drives the welding guns to synchronously move downwards to weld the large arm of the excavator to be welded, the front side welding gun welds the lowest point of the arc-shaped position of the large arm of the excavator until the large arm of the excavator to be welded is subjected to fixed-position welding, the control terminal reversely starts the two stepping motors 5, resets the two groups of welding guns to the adjusted position, then the control terminal starts the electric sliding block, conveys the large arm of the excavator to be welded to the welding position while conveying the large arm of the excavator to be welded to the next working position, and welds the large arm of the excavator to be welded according to the steps.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A multistation welding set for production of excavator swing arm, characterized by: including mirror image and equidistance distribution's flexible landing leg (1), mirror image and equidistance distribution flexible end joint of flexible landing leg (1) has mount (2), and wherein a set of mirror image distribution flexible landing leg (1) rigid coupling has put thing board (3), it is close to put thing board (3) one side sliding connection of mount (2) has locating plate (4) of mirror image distribution, mirror image distribution locating plate (4) all are provided with displacement sensor, mirror image distribution locating plate (4) all move through drive arrangement, mount (2) rigid coupling has step motor (5) of mirror image distribution, mount (2) rotation is connected with threaded rod (6) of mirror image distribution, mirror image distribution threaded rod (6) all with be provided with the driving medium between the output shaft of adjacent step motor (5), one side threaded connection of mount (2) has first connecting plate (7), mount (2) rigid coupling has first spacing lever (8) of mirror image distribution, first connecting plate (7) and first connecting plate (8) the equal sliding connection of first connecting plate (9) of mirror image distribution threaded rod (6) have one side of keeping away from the equal sliding connection of first connecting plate (9), the telescopic end of the electric telescopic rod (10) is fixedly connected with a welding gun, and an electric sliding rail for transporting goods is arranged on the lower side of the fixing frame (2).

2. The multi-station welding device for the production of the movable arm of the excavator according to claim 1, wherein the multi-station welding device is characterized in that: the utility model discloses a telescopic electric rod, including fixing frame (2), L type frame (21) are located in the fixing frame (2), one side rigid coupling that is close to put thing board (3) has L type frame (21), L type frame (21) with put thing board (3) rigid coupling, L type frame (21) are adjacent first gag lever post (8) run through, L type frame (21) are close to one side rigid coupling that puts thing board (3) has first electric putter (22), the flexible end of first electric putter (22) is provided with the blind hole, rigid coupling has division board (23) in the blind hole of the flexible end of first electric putter (22), one side sealing sliding connection of division board (23) has first arc push pedal (25) in the blind hole inner sealing sliding connection of the flexible end of first electric putter (22), division board (23) first arc push pedal (25) with the inner wall of the flexible end of first electric putter (22) mutually support and form first cavity, flexible electric putter (22) sliding connection has first electric putter (26), first electric putter (26) are located in flexible end of first electric putter (26) flexible end, first push rod (261), one side of the first moving rod (26) close to the partition plate (23) is fixedly connected with a first connecting rod (27), and one end of the first connecting rod (27) away from the first moving rod (26) is fixedly connected with the adjacent first arc-shaped pushing plate (25).

3. The multi-station welding device for the production of the movable arm of the excavator according to claim 2, wherein the multi-station welding device is characterized in that: the utility model discloses a motor vehicle, including division board (23), first movable rod (26), connecting rod (29), arc pole (28), flexible end of first electric putter (22) is provided with through the connecting piece rigid coupling have arc pole (28) of mirror image distribution, division board (23) are close to one side of first movable rod (26) is articulated through the connecting piece have spliced pole (29) of mirror image distribution, mirror image distribution spliced pole (29) all are provided with the guiding groove in adjacent spliced pole (29) slides, mirror image distribution spliced pole (29) are close to one end of first movable rod (26) all is articulated through the connecting piece have first movable block (290), the flexible end of first electric putter (22) is provided with the logical groove of its blind hole intercommunication and mirror image distribution, the logical groove rotation of flexible end of first electric putter (22) is connected with support column (291), support column (291) are provided with adjacent the spout of spacing sliding connection of first movable block (290).

4. A multi-station welding apparatus for the production of excavator boom according to claim 3, wherein: the fixing frame (2) is far away from one side rigid coupling of putting thing board (3) has fixed plate (31), fixed plate (31) are kept away from one side of putting thing board (3) is inlayed and is had first stock solution section of thick bamboo (32), the inside sealing sliding connection of first stock solution section of thick bamboo (32) has first pushing away dish (33), first stock solution section of thick bamboo (32) rigid coupling and intercommunication have first connecting pipe (331), first connecting pipe (331) and first cavity intercommunication, fixed plate (31) rotate and are connected with gear (34), fixed frame (2) sliding connection has moving plate (35) of mirror image distribution moving plate (35) all with mirror image distribution first connecting plate (7) sliding connection, mirror image distribution moving plate (35) respectively with adjacent first fixed block (9) sliding connection, mirror image distribution moving plate (35) all rigid coupling have with rack (36) meshing with first pushing away dish (33), one of them rack (36) rigid coupling with first pushing away dish (33).

5. The multi-station welding device for the production of the movable arm of the excavator according to claim 4, wherein the multi-station welding device comprises the following components: the novel electric push rod comprises a first electric push rod (22), and is characterized by further comprising a liquid storage tube (41), wherein the liquid storage tube (41) is fixedly connected to the telescopic end of the first electric push rod (22) through a connecting piece, the liquid storage tube (41) is close to one end of the first electric push rod (22) and is slidably connected with a second moving block (42), one side of the second moving block (42) away from the first electric push rod (22) is fixedly connected with a second connecting rod (421), one end of the second connecting rod (421) away from the first electric push rod (22) is fixedly connected with a second push plate (43), the second push plate (43) is in sealing sliding connection with the liquid storage tube (41), a limiting plate (44) is fixedly connected to the inside of the liquid storage tube (41), the second connecting rod (421) penetrates through the limiting plate (44) and is in sealing sliding connection with the limiting plate, a second elastic piece (45) is fixedly connected between the second push plate (43) and the limiting plate (44), the other side of the second connecting rod (421) is fixedly connected with a second push plate (43), the second push plate (43) is matched with the limiting plate (44) to form a third arc-shaped partition plate (23), the first partition plate (23) is in sliding connection with the second partition plate (23), the one end that third connecting rod (452) was kept away from first movable rod (26) with adjacent second arc push pedal (451) rigid coupling, second arc push pedal (451) division board (23) with the inner wall of the flexible end blind hole of first electric putter (22) cooperatees each other and forms the third cavity, stock solution pipe (41) rigid coupling and intercommunication have second connecting pipe (46), second connecting pipe (46) and third cavity intercommunication.

6. The multi-station welding device for the production of the movable arm of the excavator according to claim 5, wherein the multi-station welding device comprises the following components: the maximum volume of the second cavity is smaller than the maximum volume of the third cavity, and the distance between adjacent welding guns is adjustable.

7. The multi-station welding device for the production of the movable arm of the excavator according to claim 6, wherein the multi-station welding device comprises the following components: the fixing frame (2) is slidingly connected with a second connecting plate (47) in mirror image distribution on one side close to the object placing plate (3), the second connecting plate (47) in mirror image distribution is fixedly connected with the second connecting pipe (46) through connecting pieces, the second connecting pipe (46) is slidingly connected with a second moving rod (48) in mirror image distribution, the second connecting plate (47) in mirror image distribution is inlaid with a second liquid storage barrel (49), one side of the second liquid storage barrel (49) in mirror image distribution, which is close to the second connecting pipe (46), is slidingly connected with a moving cover (490), the moving cover (490) is fixedly connected with an adjacent second moving rod (48), one side of the second liquid storage barrel (49), which is close to the adjacent second moving rod (48), is fixedly connected with a second limit rod (4901), the second moving rod (4901) is provided with a blind hole which is slidingly matched with the second limit rod (4901), the second limit rod (4901) is provided with a sealing cover (491) which is fixedly connected with a sealing cover (491), the sealing cover (491) is arranged on one side, which is far away from the sealing cover (491) and is fixedly connected with the sealing cover (491) through a sealing cover (491), one side of the connecting ring (492) is provided with a through hole.

8. The multi-station welding device for the production of the movable arm of the excavator according to claim 7, wherein the multi-station welding device comprises the following components: the first connecting plate (7) is fixedly connected with a second fixing block (51), the first connecting plate (7) is inlaid with a hydraulic push rod (52), the telescopic end of the hydraulic push rod (52) is fixedly connected with a third fixing block (53), the second fixing block (51) is provided with a sliding chute which is in sliding fit with the third fixing block (53), a spring is fixedly connected between the third fixing block (53) and the second fixing block (51), the third fixing block (53) is fixedly connected with a second connecting plate (47), the first connecting plate (7) is fixedly connected with a second electric push rod (54) through a connecting piece, the second connecting plate (47) is provided with a groove which is in sliding fit with the adjacent second electric push rod (54), the telescopic end of the second electric push rod (54) is provided with a blind hole, a sealing tube (55) is fixedly connected in the blind hole of the telescopic end of the second electric push rod (54), a third moving rod (56) is fixedly connected between the third fixing block (53) and the second fixing block (51), the first fixing block (9) is fixedly connected with a second connecting plate (47) through a connecting plate (47), the second connecting plate (47) is fixedly connected with a sealing tube (55) through a sealing sleeve, the sealing sleeve (55) is fixedly connected with the second connecting plate (10), the third connecting pipe (57) penetrates through the second connecting plate (47) and is communicated with the second liquid storage barrel (49), the second liquid storage barrel (49) is fixedly connected and communicated with a fourth connecting pipe (58), the fourth connecting pipe (58) penetrates through the first connecting plate (7) and is communicated with the fixing part of the hydraulic push rod (52), the second liquid storage barrel (49) is fixedly connected and is communicated with a fifth connecting pipe (59), and the fifth connecting pipe (59) is communicated with the adjacent liquid storage box.

9. The multi-station welding device for the production of the movable arm of the excavator according to claim 8, wherein the multi-station welding device is characterized in that: the through holes on the connecting ring (492) are diamond-shaped for changing the flow area of the fourth connecting pipe (58) and the fifth connecting pipe (59).

10. A multi-station welding method for the production of a movable arm of an excavator based on the multi-station welding device for the production of a movable arm of an excavator according to claim 9, characterized by comprising the following steps:

s1: when the device is used for carrying out positioning welding on the large arms of the excavator, the large arms of the excavator are welded, and are placed on the upper side of the object placing plate (3) to serve as samples;

s2: the method comprises the steps that a worker starts an existing driving device through a control terminal to drive two positioning plates (4) to move oppositely, displacement sensors on the two positioning plates (4) upload the moving distances of the two positioning plates (4) to the control terminal respectively, the control terminal calculates the length of a sample, and then the worker sets the number of positioning welding points through the control terminal according to the length of the sample;

s3: the method comprises the steps that a first electric push rod (22) is started, a telescopic end of the first electric push rod (22) drives a first moving rod (26) to synchronously move downwards, and after the lowest end of the first moving rod (26) is contacted with the lowest point of an arc-shaped position of a sample, the first moving rod (26) moves upwards along a through hole on the telescopic end of the first electric push rod (22) under the action of reverse acting force of the bottom of the sample;

S4: the first moving rod (26) moves upwards to squeeze hydraulic oil in a right cavity of a telescopic end of the first electric push rod (22) into the first connecting pipe (331), so that the first push plate (33) is driven to move rightwards along the first liquid storage barrel (32), and then an adjacent group of first fixed blocks (9) are driven to synchronously move, and the distance between the two groups of first fixed blocks (9) is changed;

s5: the first moving rod (26) drives the two support columns (291) to rotate, the distance between the two side walls of the sample is detected by the two support columns (291), and meanwhile, the two groups of welding guns and the inner side of the large arm of the excavator to be welded are positioned on the same horizontal plane;

s6: the first connecting rod (27) driven by the first moving rod (26) synchronously conveys hydraulic oil in a cavity at the left side of the telescopic end of the first electric push rod (22) into the second connecting pipe (46), the first electric push rod (22) drives the liquid storage pipe (41) to synchronously move downwards, the extruded hydraulic oil in the cavity at the telescopic end of the first electric push rod (22) is pumped back into the liquid storage pipe (41), the thickness of the side wall of a sample is detected through the volume of the hydraulic oil in the cavity at the telescopic end of the first electric push rod (22) remained in the second connecting pipe (46), and the moving speed of a welding gun is changed;

S7: after the position of the welding gun is adjusted, the control terminal starts the electric sliding block, the first large arm of the excavator to be welded is transported to a welding position, and then the control terminal starts the telescopic supporting leg (1) to adjust the horizontal position of the fixing frame (2);

s8: after the position of the fixing frame (2) is adjusted, the control terminal starts two stepping motors (5), the welding gun after adjustment is driven by the two stepping motors (5) to move, the electric telescopic rod (10) is started simultaneously and drives the welding gun to move downwards synchronously, the large arm of the excavator to be welded is welded, the front side welding gun welds the lowest point of the arc-shaped position of the large arm of the excavator until the large arm of the excavator to be welded is welded, after the fixed-position welding of the large arm of the excavator to be welded is completed, the control terminal reversely starts the two stepping motors (5), resets the two groups of welding guns to the adjusted position, then the control terminal starts the electric sliding block, conveys the large arm of the excavator to be welded to the welding position while conveying the large arm of the excavator to be welded to the next working position, and welds the large arm of the excavator according to the steps.