CN214350209U - Continuous welding production line for grid type arch centering - Google Patents

Abstract

The utility model discloses a grid type arch center continuous welding production line, which comprises a molding area, a welding forming area and a shaping area in sequence from the main rib inlet to the direction of an arch center product outlet; at least a plurality of welding clamping tools for forming a welding clamp are distributed in the molding area and the shaping area; the welding clamping fixture located in the molding area respectively restrains the single main rib of the arch frame, and the welding clamping fixture located in the molding area integrally restrains the cross section shape of the arch frame. The utility model has the advantages of compared with the prior art, realized the continuous welding production of bow member, solved the low and high difficult problem of manufacturing cost of bow member welding efficiency of long-term puzzlement trade, improved bow member production efficiency, reduced manufacturing cost.

Description

Continuous welding production line for grid type arch centering

Technical Field

The utility model relates to a continuous welding production line, especially a continuous welding production line of grid type bow member.

Background

After the excavation of tunnels such as railways, highways, subways or high-speed railways is finished, steel frameworks are required to be installed and serve as basic frameworks of the bottom lining concrete layer and are used for bearing the weight of rock soil above the tunnels and unloading the rock soil on the tunnel foundation through the tunnel wall. In order to maintain the structural stability of the tunnel, the tunnel section is usually designed in a goose egg shape, and the shape of the corresponding steel skeleton is matched with that of the tunnel section. When the steel skeleton is manufactured, the steel skeleton is required to be manufactured according to a plurality of sections respectively, and most of the sections are required to be manufactured into an arch, which is called an arch frame for short. The arch center structural form comprises a profile steel arch center and a steel bar arch center, wherein the steel bar arch center is a flower arch center which mainly adopts a threaded steel bar welding to form a truss structure and is also called a grid arch center. The flower arch or the grid arch is mainly manufactured by welding a plurality of main ribs together through a plurality of flower ribs. The most effective mode of the existing grid arch frame is a film welding mode combining a welding clamp and a welding robot, so that the efficiency is improved, and the welding quality is guaranteed. The arch frame moulding bed welding method is characterized in that after a welding lug on one edge surface of the truss is independently welded, a plurality of welding lugs are combined together. Firstly, the main ribs are pressed and bent by a forming die to be plastically deformed into an arch shape, and then two arch-shaped main ribs forming the soldering lug are fixed on a tire membrane to be welded with the ribs; secondly, two main ribs forming the soldering lug are fixed on the tire membrane, the tire membrane is enabled to form an arch under the elastic deformation state, then the flower ribs are welded to form a stable structure, and the mode is also the highest welding mode in the prior art. Because both the two manufacturing modes can only form one soldering lug in the grid arch, the integral formation of the arch also needs to combine and weld the soldering lugs together, and in the polygon with the odd number of the cross section of the arch, or a double-main rib structure is adopted, so that after the soldering lugs with the same number of sides are welded, the soldering lugs are combined and welded together through direct welding between the main ribs; or when the arch center is combined, the ribs on two prismatic surfaces need to be welded, so that the manufacturing speed of the arch center is severely limited. Therefore, a continuous welding production method which can realize integral welding of the arch centering by utilizing the elastic characteristic of the steel bars and adopting a die welding technology is needed, so that the production efficiency is obviously improved, and the production cost is reduced.

Disclosure of Invention

This use neotype purpose is exactly to the not enough of bow member welding inefficiency in the current, provide a continuous welding production line of grid type bow member, utilize the elastic characteristic of long and thin main muscle material, form through welding jig restraint and set for radian and cross-sectional characteristic, behind welding forming district welding flower muscle, form a festival section of bow member main part, finally, form stable in structure's bow member main part shaping section behind design district release welding stress, thereby the continuous welding production of bow member has been realized, bow member production efficiency has been improved, and the production cost is reduced.

In order to achieve the purpose, the novel application adopts the following technical scheme.

A continuous welding production line for a grid type arch center sequentially comprises a molding area, a welding forming area and a shaping area from the inlet of a main rib to the outlet of an arch center product; at least a plurality of welding clamping tools for forming a welding clamp are distributed in the molding area and the shaping area; the welding clamping fixture located in the molding area respectively restrains the single main rib of the arch frame, and the welding clamping fixture located in the molding area integrally restrains the cross section shape of the arch frame.

According to the technical scheme, the welding line utilizes the elastic characteristic of a long and thin main rib material, the preset radian and the section characteristic are formed through the constraint of the welding fixture, a section of the arch body is formed after the welding forming area is welded with the ribs, and finally, the arch body forming section with a stable structure is formed after the welding stress is released in the forming area. When the arch is welded, the alternate circulation process of pushing the main ribs and welding the patterned ribs is continuously carried out, the length of the formed section of the arch main body is continuously increased, and then an arch main body connecting piece is formed, so that a single arch main body is obtained after cutting off; and finally, welding a connecting plate on the arch body and tightening to obtain an arch finished product, thereby realizing the continuous welding production of the arch. The production efficiency of the arch frame is improved, and the production cost is reduced.

Preferably, an automatic welding machine is arranged in the welding forming area. The automatic welding machine has the advantages that mature industrial control technology is utilized, welding automation is realized, hidden danger of product quality caused by human factors is eliminated, welding quality is guaranteed, and production efficiency can be further improved.

Preferably, the feeding end of the welding fixture is provided with a main rib pushing device, the main rib pushing device is provided with a plurality of one-way clamping mechanisms for clamping a single main rib, and the main rib pushing device can swing in a self-adaptive mode along with different pushing length requirements of a plurality of main ribs. The automatic feeding is realized through the pushing device, the one-way characteristic of the clamping mechanism and the self-adaptive deflection characteristic of the main rib pushing device are skillfully realized, the synchronous feeding of a plurality of main ribs is realized, the phenomenon that the clamping resistance occurs due to the fact that the number of stressed main ribs is small and the acting force deviates from the pushing center is avoided, and the operation reliability of the feeding mechanism is improved. And main muscle pusher is when the propelling movement main muscle, with the bow member of stereotyping from the exit end of production line seeing off, for set up at the export section and draw the device that draws, conveniently set up cutting equipment at the exit end, cut into the singleton product with bow member main part link.

Preferably, a patterned rib feeding mechanism is further arranged in the welding forming area, the patterned rib feeding mechanism is used for sending out patterned ribs in the storage bin one by one and placing the patterned ribs at positions to be welded, and the patterned ribs can be in a posture consistent with the posture after welding. The automatic feeding of the ribs is realized by utilizing the existing mature industrial control technology, and the production efficiency of the arch frame is further improved.

Preferably, the device further comprises a flash welding machine which is used for main rib lengthening welding and is provided with a weld seam finishing unit. The flash butt welding is utilized to realize firm connection, the protruding part of the welding line is small, and the butt welding line is made of the main rib material which is smooth and extends continuously, so that the improvement of the production efficiency is further guaranteed.

The novel beneficial effects of this use are that, realized the continuous welding production of bow member, solved the difficult problem that the bow member welding efficiency is low and manufacturing cost is high of long-term puzzlement trade, improved bow member production efficiency, reduced manufacturing cost.

Drawings

FIG. 1 is a plan view of the present invention using a novel grid continuous welding line.

FIG. 2 is a schematic front view of the structure of the novel mold before welding.

Fig. 3 is an enlarged view of a portion a in fig. 2 according to the present novel use.

Fig. 4 is a left side view of fig. 2 with only a portion of the structure shown in the new use.

FIG. 5 is a schematic rear view of the structure of the new mold before welding.

FIG. 6 is a schematic front view of the novel middle post-weld clamping fixture.

Fig. 7 is an enlarged view of a portion B in fig. 6 according to the present novel use.

Fig. 8 is a left side view of fig. 6 with only a portion of the structure shown in the new use.

FIG. 9 is a schematic rear view of the structure of the new middle post-weld clamping fixture.

FIG. 10 is a schematic diagram of the structure of the novel automatic welding machine.

Fig. 11 is a schematic front view of the structure of the novel middle main rib pushing device.

Fig. 12 is a view from direction a of fig. 11 in the present new usage.

Fig. 13 is a partial structural schematic diagram of the novel middle main rib pushing device, wherein the one-way clamping mechanism is in a feeding stroke state.

Fig. 14 is a schematic structural diagram of the novel middle-rib feeding mechanism, wherein the ribs are horizontally pushed and turned over to be in place.

Figure 15 is a top view of the new use of figure 14.

Fig. 16 is a schematic diagram of a novel push-type flower rib structure applied to the present invention.

Fig. 17 is a schematic structural diagram of the novel middle-rib feeding mechanism, wherein the ribs are pushed obliquely to be in place.

FIG. 18 is a front view showing the structure of the novel mid-flash welding machine.

Fig. 19 is a left side view of fig. 18 in accordance with the present novel use.

FIG. 20 is a schematic front view of the novel mid-weld finishing unit.

Fig. 21 is a view from direction a of fig. 20 in the present new usage.

Fig. 22 is a view from direction B of fig. 20 in the present new usage.

Fig. 23 is a view in the direction C of fig. 20 according to the present novel use.

Detailed Description

The invention will be further described with reference to the drawings, but the invention is not limited thereto.

Referring to fig. 1 to 23, a continuous welding production line for grid-type arches sequentially comprises a molding area, a welding forming area and a shaping area from the inlet of a main rib to the outlet of an arch product; at least a plurality of welding clamping tools 100 which form a welding fixture are distributed in the molding area and the shaping area; the welding clamping fixture 100 located in the molding area respectively restrains the single main rib of the arch frame, and the welding clamping fixture 100 located in the molding area integrally restrains the cross section shape of the arch frame.

Wherein, a plurality of automatic welding machines 200 are arranged in the welding forming area, and each automatic welding machine 200 is welded with at least one welding line. The welding jig is characterized in that a main rib pushing device 300 is arranged at the feeding end of the welding jig, a plurality of one-way clamping mechanisms for clamping a single main rib are arranged on the main rib pushing device 300, and the main rib pushing device 300 can swing in a self-adaptive mode along with different pushing length requirements of the main ribs. The welding forming area is also provided with a patterned rib feeding mechanism 400, the patterned rib feeding mechanism 400 is used for sending out patterned ribs in the storage bin one by one and placing the patterned ribs at positions to be welded, and the patterned ribs can be in a posture consistent with the posture after welding. The main reinforcement material section is also provided with a flash welding machine 500 which is used for lengthening and welding the main reinforcement and is provided with a weld joint finishing unit; the flash welding machine 500 is arranged on a rail car 510, and the rail car 510 can be driven by a flash welding machine driving cylinder to move back and forth on a ground rail.

The welding fixture 100 is composed of a pre-welding fixture arranged in the molding zone and a post-welding fixture arranged in the molding zone, and the welding fixture 100 is fixedly connected to the welding work platform 408.

Referring to fig. 2, 3, 4 and 5, the pre-welding jig comprises a vertically arranged foundation plate 101, and the foundation plate 101 is provided with a plurality of through holes 101a for single main reinforcement steel bars of the arch frame to pass through; the base plate 101 is provided with a sheave 121 for rolling and supporting the main reinforcement bar of the arch.

The grooved wheels 121 are arranged in pairs, the axes of the two grooved wheels 121 in a pair are vertically arranged in parallel, and the plane where the two axes are located is parallel to the side face of the foundation plate 101. The two grooved wheels 121 are positioned in the sheave frame 122 and are arranged by a sheave shaft 123 penetrating the sheave frame 122, and the circumferential wall of the sheave frame 122 abuts against the side surface of the mounting seat 124 corresponding to the side surface and is fixedly connected with the mounting seat 124 by a bolt 125. Two sides of the sheave frame 122 are respectively provided with a mounting seat 124, and the two mounting seats 124 are welded on the base plate 101. The through hole 101a is formed by a long hole, and a plurality of long holes are distributed in a radial shape; the grooved pulley 121 is arranged on the foundation plate 101 in a position adjustable manner along the long hole; the bolt through holes for the bolts 125 to pass through are bar-shaped holes in the mounting seat 124.

In addition, the base plate 101 is arranged on the base 103 in a position adjustable mode, the base plate 101 is adjusted according to the direction of only changing the arc size of the arch, and a screw nut adjusting structure is arranged between the base plate 101 and the base plate 101. Wherein, the screw nut regulation structure includes that the level sets up the lead screw 111 that is on a parallel with foundatin plate 101, with lead screw 111 complex nut 112 fixed connection on foundatin plate 101, the removal direction when foundatin plate 101 carries out position control through guide structure, guide structure includes two parallel and level setting's guide post 113, two guide post 113 are upper and lower distribution, fix on foundatin plate 101 with guide pin bushing 114 of guide post 113, the both ends of guide post 113 are supported on the base 103 of fixed setting, same end of two guide post 113 is connected on same base 103, two guide post 113 are located the same one side of foundatin plate 101, lead screw 111 is located the opposite side of foundatin plate 101, lead screw 111 supports respectively on the base 103 of corresponding end through both ends. This arrangement makes it possible to sufficiently utilize the height space of the base plate 101, and is advantageous in reducing the overall height, and at the same time, by providing the lead screw 111 and the guide post 113 on both sides, the structural stability is enhanced, and the number of parts is reduced. Specifically, the foundation plate 101 is provided with three through holes 101a, and the elongated holes forming the three through holes 101a are radially distributed and are suitable for welding an arch with a triangular cross section. The mounting surface of the sheave bracket 122 for mounting on the mounting seat 124 is parallel to the center line of the slotted hole; when the central line of the slotted hole is vertical, two end faces of the peripheral wall of the sheave frame 122 are connected with the mounting seat 124 in an abutting mode; when the central line of the elongated hole is inclined, in order to ensure the requirement of vertical arrangement of the axis of the roller 21, the sheave frame 122 needs to be additionally provided with a connecting part with an inclined surface on the peripheral wall to be connected with the mounting seat 124 in an abutting manner. The drawings show that only one side of the foundation plate is provided with the grooved wheel 121, and the scheme that the grooved wheels 121 are arranged on two sides is not shown in the drawings.

Referring to fig. 6, 7, 8 and 9, a polygonal hole 101b for the arch to pass through integrally is formed in the middle of a foundation plate 101 vertically arranged in the post-welding mold; the base plate 101 is provided with a sheave 121 for rolling and supporting the main reinforcement bar of the arch. Wherein, a grooved wheel 121 is arranged at each vertex of the polygon; the sheave 121 is arranged at the far end of a sheave bracket 126, the sheave bracket 126 is fixedly connected to the foundation plate 101 through a fixing bolt 127, the foundation plate 101 is provided with strip-shaped mounting holes for penetrating bolts, and the strip-shaped mounting holes are distributed radially. The sheave bracket 126 is in a long strip shape; the foundation plate 101 is fixedly connected with a support limiting seat 128, and the support limiting seat 128 abuts against the side surface of the sheave bracket 126. Specifically, the polygon is a triangle, and is suitable for a triangular arch frame with a triangular welding end face, or a triangular arch frame. When the polygon is quadrilateral, pentagonal or hexagonal, the welding device is used for welding the arch centering corresponding to the polygonal section. The rest structure of the mold after welding is the same as that of the mold before welding, and the description is omitted.

Wherein, the welding of foundatin plate 101 lower extreme has the bottom plate, and the two forms "T" shape structure to it is fixed through the bottom plate installation. During installation, attention needs to be paid to installation at a proper position, and the method is suitable for linear sections of linear trusses or arches.

Referring to fig. 10, the automatic welding machine adopts a structure that a truss manipulator is combined with an adjustable welding gun support, the truss manipulator specifically comprises a lifting arm 201, and a longitudinal linear module 202 and a transverse linear module 203 which are arranged through the lifting arm 201, and the lifting arm 201 is driven to lift through a lifting driving cylinder 204; the adjustable torch support 205 is a multi-axis adjustable structure; the longitudinal straight line module 202 is arranged along the length direction of the welding seam, and the transverse straight line module 203 is arranged along the width direction of the welding seam, so that the zigzag welding seam can be conveniently obtained by comprehensively forming a sub-shaped motion track by utilizing the characteristics of independent driving and digital control of the straight line modules.

Referring to fig. 11, 12 and 13, the main rib pushing device 300 includes a base frame 301 and a pushing cylinder 302 for pushing the base frame 301 to move; the plurality of one-way clamping mechanisms are arranged on the base frame 301, and the lower end of the base frame 301 is provided with a roller 309; both the base frame 301 and the push cylinder 302 are able to swing in the plane of the support platform 303. The one-way clamping mechanism comprises a box-shaped material box 304, a material penetrating channel for the strip-shaped material to pass through is formed at the box bottom of the box-shaped material box 304, a cam or eccentric wheel 305 is arranged beside the material penetrating channel, and the cam or eccentric wheel 305 is rotatably arranged between two side walls of the box-shaped material box 304 through a hinge pin 306; a spring member 307 for driving the cam or eccentric 305 to rotate is arranged between the box-shaped material box 304 and the cam or eccentric 305 so as to narrow the material passing channel.

Wherein the cam or eccentric 305 is sector shaped; the spring member 307 is composed of a compression spring, the compression spring is arranged in a spring mounting pipe 307a, the spring mounting pipe 307a is fixed on the box-shaped material box 304, a pipe orifice at one end is provided with a blocked plug 307b so that a pipe orifice forms a blind hole structure, the free end of the spring extends out of the open pipe orifice and is abutted against the side surface of the cam or eccentric wheel 305, the abutting point is close to the elevation end of the working curved surface of the cam or eccentric wheel 305, and the distance from the center of the cam or eccentric wheel 305 to the edge of the working curved surface is gradually reduced from the elevation end to the low-end of the working curved surface; the cam or eccentric 305 hinge axis is on its central axis. The cam or eccentric 305 has a cam working surface formed with a pattern or unidirectional teeth 5 a; a limiting component 308 is fixedly connected on the box-shaped material box 304, and the limiting component 308 limits the limit position of the cam or eccentric wheel 305 in rotation; the stop member 308 is formed by a member such as a pin, post or peg, and the stop member 308 is fixedly attached to the magazine 304 and is adapted to abut against the side edge of the cam or eccentric 305 at the lower end of the working surface.

The base frame 301 comprises two vertical plates 301a which are vertically and parallelly arranged, and the two vertical plates 301a are connected through a connecting plate 301 b; the one-way clamping mechanism is arranged on the connecting plate 301 b; the pushing oil cylinder 302 is connected with the vertical plate 301a on the corresponding side; a strip-shaped hole for a strip-shaped material to pass through is formed in the vertical plate 301 a; the connecting plate 301b is provided with a long hole for connecting the unidirectional clamping mechanism; the one-way clamping mechanism is connected with the connecting plate 301b only through a single mounting hole 304a on the box-shaped material box 304

Specifically, the one-way clamping mechanism is only provided with a single cam or eccentric wheel 305, a box-shaped material box 304 provided with clamping jaws forms a leaning base of the strip-shaped material, and when the box-shaped material box 304 is in a U-shaped structure, the material is leaned against by the groove wall of the groove at the bottom of the box-shaped material box 304; under the condition that the box-shaped material box 304 is provided with the plugging plates at two ends of the U shape, material through holes can be formed in the plugging plates, and when the hole wall is away from the bottom wall of the groove, part of the hole wall close to the bottom wall forms a leaning foundation; when the hole wall close to the bottom of the groove is superposed with the bottom wall of the groove, the groove wall of the bottom groove of the box-shaped material box 304 is abutted against the material. The spring member 307 may be a leaf spring, an extension spring, a compression spring, a torsion spring, or the like, in addition to a compression spring.

When the clamping device is used for welding and feeding the arch, the number of the one-way clamping mechanisms and the number of the strip holes for the strip-shaped materials to pass through on the base frame 301 are equal to the number of the main ribs of the arch, and if the quadrangular arch needs to be provided with 4 clamping mechanisms, the rectangular arch can be clamped by the clamping device. The attached drawings show the arrangement mode of three one-way clamping mechanisms for welding the triangular arch frame.

Referring to fig. 14 and 15, the stud feeding mechanism 400 includes a bin 401 for providing arch studs one by one in a flat state, a material receiving platform 416 is disposed below the bin 401, a stud pushing plate 403 driven by a material pushing cylinder 402 is disposed behind the material receiving platform 416, the stud pushing plate 403 can pass through the bin 401, a welding carrier 404 is disposed in front of the material receiving platform 416, and an arch stud positioning structure is disposed on the welding carrier 404, so that the arch studs borne on the welding carrier are located at corresponding positions to the main studs of the arch.

The ribbed push plate 403 is connected with the wall plates in a sliding manner through guide grooves 409a arranged on the wall plates 409 at two sides; the wall plate is fixedly connected to the bottom plate 407; the bottom plate 407 is arranged on the welding working platform 408 in a position adjustable manner, and the position adjusting moving direction of the bottom plate 407 is consistent with the normal direction of the corresponding position of the arch frame; when the arch is linear, the moving direction of the bottom plate 407 is vertical to the longitudinal direction of the arch; when the arch is arc-shaped, the moving direction of the bottom plate 407 is the same as the vertical direction of the arc tangent line at the corresponding position of the arch, i.e. the normal direction. A screw nut adjusting structure is arranged between the bottom plate 407 and the welding work platform 408, and comprises a screw 410, a nut 411 and two screw seats 412, the screw 410 is rotatably supported on the two screw seats 412, the screw seats 412 are fixed on the welding work platform 408, and the nut 411 is fixed on the bottom plate 407; the bottom plate 407 and the welding work platform 408 are guided by two circular guide posts 414, the circular guide posts 414 are fixed on the welding work platform 408 by mounting seats 415, and guide sleeves matched with the circular guide posts 414 are fixedly connected to the bottom plate 407.

The welding carrying table 404 is arranged in a turnover manner, the welding carrying table 404 is hinged with a turnover driving cylinder 405, the turnover driving cylinder 405 is hinged on the two side wall plates 409 through the middle parts of cylinder bodies, or is hinged on a turnover cylinder seat, and the turnover cylinder seat is fixed on the bottom plate 407 or the side wall plates 409; a turnover limiting structure for limiting the turnover angle of the welding carrier 404 is arranged beside the welding carrier; in a use state, the material receiving platform 416 extends from the outer side to the inner side of the corresponding arch main rib from the lower side of the corresponding arch main rib, and a space for passing the arch ribs is formed between the material receiving platform and the corresponding arch main rib. The overturning limiting structure comprises an angle steel type limiting seat 413, and the angle steel type limiting seat 413 is fixed on the bottom plate 407; a limiting bulge is arranged on the angle steel type limiting seat 413; the arch truss rib positioning structure is composed of a plurality of positioning nails 406 distributed along the shape of the arch truss rib, the distribution of the positioning nails 406 can limit the longitudinal movement limit position of the rib and the left and right positions of the rib, and the limit bulge on the angle steel type limit seat 413 is abutted against the positioning nails 406 to limit the turning limit position of the welding carrier 404; the welding stage 404 is made of an insulating material, or when the arch ribs are located at the welding position, the surface of the area where the arch ribs are in contact with the welding stage 404 is covered with or embedded with the insulating material.

Fig. 16 shows that the arch truss ribs are in the shape of an open trapezoid with a tail wing, the opening is closed after the tail wing is welded with the main rib, and adjacent tail wings are combined to form a top of a reverse trapezoid, so that the arch truss forms a combined structure of a forward and reverse staggered trapezoid along the longitudinal direction.

Feed bin 401 includes a vertical setting and is buckled into the back bulkhead 101a of bow member flower muscle shape by panel, bulkhead 101a the place ahead distributes and forms the bulkhead before the fence form by the stand or the riser of a plurality of vertical settings, preceding bulkhead is still including being used for respectively with a plurality of stands or riser fixed connection connecting plate 401b as an organic whole from stand or riser top and bottom, the connecting plate of lower extreme and back bulkhead 101a all are middle unsettled mode setting, the connecting plate of lower extreme and back bulkhead 101a both ends all with two lateral wall boards 409 fixed connection, and preceding bulkhead is higher than back bulkhead 101a, in order to make things convenient for bow member flower muscle material loading. To facilitate the loading of the ribs, it is preferable that the trough is extended upward obliquely rearward from the top of the rear wall 101a, so that the ribs can be placed in the trough, automatically slide down into the bin 401 by gravity, and be stacked one by one in the bin. Although the trough structure is not shown in the drawings, the skilled person will understand that the trough structure is the same as the common automatic chute structure, and only the size corresponding to the arch rib is considered.

Wherein, flower muscle push pedal 403 level sets up, and the spacing seat 413 of angle steel type will weld microscope carrier 404 restriction in the upset position that is vertical state, and it is the vertical faceted pebble propelling movement flower muscle of bow member to correspond.

Referring to fig. 17, the ribbed push plate 403 is arranged at a slant angle of 30 degrees from the top, and is used for providing ribbed bars to a slant ridge surface of the arch center, and the welding carrier 404 is fixedly arranged; the welding carrier 404 is arranged in parallel with the material receiving platform 416 and is lower than the material receiving platform 416; in a use state, the welding carrier 404 is positioned on the inner side of the arch main rib corresponding to the polygonal arch cross section, the front end of the material receiving platform 416 is positioned on the outer side of the arch main rib corresponding to the polygonal arch cross section, and the material receiving platform 416 is not lower than the arch main rib.

Obviously, when the patterned ribs are provided on the oblique-upward edge surface of the arch frame, the patterned rib pushing plate 403 is arranged obliquely upward.

The welding stage 404 may be configured as a lifting structure driven by an electric cylinder or an air cylinder.

Referring to fig. 18, 19, the flash welding machine 500 includes a welding unit 511 and a bead finishing unit 512 constituted by a flash welding machine; the flash welding machine is fixedly arranged on the rail car platform 513; the welding seam polishing unit 512 is transversely movably arranged on the rail car platform 513 and is connected with a welding seam polishing unit driving oil cylinder 516, the rail car platform 513 is provided with two guide rods 517, two ends of each guide rod 517 are supported on the guide rod seats 518, a base 514 of the flash welding machine is provided with a guide support lug, the guide support lug and the guide rods 517 form a sliding fit structure matched with a shaft hole, the welding seam polishing unit driving oil cylinder 516 is connected with the welding seam polishing unit 512 through an oil cylinder connecting seat of the base 514, and the welding seam polishing unit driving oil cylinder 516 is located in the middle between the two guide rods 517 in the width direction.

The welding seam polishing unit 512 comprises a workpiece clamping mechanism and an annular polishing scraper 501, the workpiece clamping mechanism is relatively fixedly arranged on a base 514, the annular polishing scraper 501 is fixedly connected to a tool apron 502, the tool apron 502 can move longitudinally relative to the workpiece clamping mechanism, and the tool apron 502 is connected with a tool apron driving oil cylinder 503; and the inner hole of the annular smoothing scraper 501 is suitable for a round part lengthening welding round shape, and the cutter seat 502 is arranged on the side wall of the front side of the base 514 through the guide structures of the two guide columns 515.

Referring to fig. 20, 21, 22 and 23, the workpiece clamping mechanism includes a clamping seat 504 of a U-shaped fork structure, the clamping seat 504 is fixed on the same side wall of the base 514 where the tool apron 502 is arranged, the U-shaped fork is horizontally arranged, a first insertion hole vertically arranged is formed in a U-shaped side arm of the clamping seat 504, a positioning block 505 is slidably fitted in the first insertion hole, a second insertion hole horizontally arranged is formed in a U-shaped bottom end of the clamping seat 504, a pressing block 506 is fitted in the second insertion hole, and the pressing block 506 is connected with a pressing cylinder 507; the opposite surfaces of the positioning block 505 and the pressing block 506 are both provided with workpiece receiving grooves, and the positioning block 505 and the pressing block 506 are abutted against a workpiece through the groove walls of the workpiece receiving grooves; the workpiece receiving groove adopts an arc-shaped groove or a V-shaped groove suitable for a circular piece, and when the positioning block 505 and the pressing block 506 clamp the workpiece, the axis of the workpiece is positioned on the symmetrical plane of the U shape of the U-shaped fork and is coincident with the axis of the annular smoothing scraper 501. The positioning block 505 is further connected with a positioning oil cylinder 508 which moves, a lever 509 is arranged between the positioning block 505 and the positioning oil cylinder 508, the lever 509 is hinged to the top end of the base 514, two ends of the lever 509 are respectively hinged to the distal ends of piston rods of the positioning block 505 and the positioning oil cylinder 508, and a cylinder body of the positioning oil cylinder 508 is hinged to a cylinder seat fixedly connected to the back side wall of the base 514.

In addition, the tool apron 502 is composed of a bearing part and a scraper mounting part, the bearing part is provided with a U-shaped slot, the U-shaped slot is consistent with the U-shaped slot of the U-shaped fork on the clamping seat 504 in orientation and is positioned on the same straight line, and the scraper mounting part is composed of a fixed mounting part and a movable mounting part to form a hoop type structure; one end of the movable mounting part 520 is hinged on the fixed mounting part, and the other end of the movable mounting part is connected with the fixed mounting part through a screw 521 and a butterfly nut 522; the bearing part and the fixed mounting part form an integral structure, a guide hole is arranged on the combined part, the guide hole is in sliding fit with the guide column 515 and is connected with a piston rod of the tool apron driving oil cylinder 503 through the combined part, and the tool apron driving oil cylinder 503 is connected with the base 514; the two guide posts 515 are distributed vertically, two ends of the guide posts 515 are fixed on the guide post supporting seats 516, the guide post supporting seats 516 are fixed on the base 514, and the guide post supporting seats 516 are also used for limiting the limit position of the movement of the tool apron 502. Correspondingly, the annular smoothing scraper 501 is of a two-segment combined structure, and the two blade segments 502a are respectively installed in the cutter installation grooves of the fixed installation part and the movable installation part; the tail end of the annular smoothing scraper 501 abuts against the bearing part of the cutter seat 502; specifically, in the axial direction, a shim 510 is further arranged between the annular smoothing scraper 501 and the bearing part, the shim 510 is also in a two-piece structure and is arranged in one-to-one correspondence with the two pieces of the annular smoothing scraper 501, and the diameter of an inner hole of the shim 510 is larger than that of an inner hole formed by the cutter point of the annular smoothing scraper 501.

The drawing only shows that one part is provided with the workpiece clamping mechanism, and the two parts can also be provided with the workpiece clamping mechanisms, so that the welded seam of a welded product is stretched in the finishing process, and the method is suitable for butt-jointed workpieces with large welded seam areas. When the two parts are arranged, except for one part as shown in the figure, the other part in front of the finishing stroke of the tool apron 502 is arranged, so that two sections of butt-welded products are clamped and fixed by arranging the workpiece clamping mechanisms at the two parts. In addition, when a workpiece clamping mechanism is arranged at one position, the workpiece clamping mechanism can also be arranged in front of the finishing stroke of the tool apron 502, and the workpiece clamping mechanism arranged in front is utilized to extrude the welded seam of the welded product in the finishing process, so that the hidden danger of weakening the strength of the welded seam is eliminated, and the workpiece clamping mechanism is more suitable for workpieces with relatively small welded seam area, such as tubular members and the like.

An arch center welding method applying the grid type arch center continuous welding production line comprises the following steps:

step one, main rib feeding: sequentially conveying the main ribs of the arch to a plurality of clamping tools 100 from a main rib inlet of a welding fixture to an arch product outlet, wherein the main ribs are provided with main rib sections crossing over a welding forming area so as to mold the main rib sections on the welding fixture into an arch shape through the positioning of the welding clamping tools 100;

step two, flower reinforcement feeding: placing arch frame ribs of a welding cycle at positions to be welded one by one;

step three, welding the ribs: in the welding forming area, welding the arch frame rib arranged at the position to be welded with the corresponding arch frame main rib to form a welding forming section of the arch frame main body;

fourthly, fixed-length pushing: moving the weld forming section out of the weld forming zone;

fifthly, continuously welding: and circularly executing the second step to the fourth step.

Wherein, in the welding step of the ribs, the welding gun welds according to a zigzag walking track. Before the main bar is fed, the steps of main bar lengthening welding and long butt welding seam polishing treatment are also included; in the main rib feeding step, a main rib pushing device is used for pushing synchronously so as to realize equal-length or equal-radian pushing of a plurality of main rib materials. When the pushing is carried out at equal radian, the requirements of different feeding lengths of the inner main rib and the outer main rib are met by utilizing the coordination and matching of the swingable feeding structure and the unidirectional characteristic of the unidirectional clamping mechanism; and in the step of feeding the patterned ribs, feeding by using a patterned rib feeding device.

When carrying out the bow member welding on this novel welding line of use specifically, include:

firstly, flash butt welding: the multiple arch frame main ribs are continuously lengthened in a staggered mode through lightning butt welding.

II, finishing the lightning butt welding seam: and removing welding slag of the welding seam of the lightning butt welding to obtain the continuous smooth main arch frame rib.

Thirdly, synchronously feeding a plurality of arch frame main ribs: and a plurality of arch frame main ribs are synchronously and integrally pushed, and unidirectional fixed-length feeding is realized.

Fourthly, shaping the arch frame: under the constraint of a plurality of welding clamping fixtures distributed according to the designed shape, the main reinforcement steel bars form the main reinforcement of the grid-type arch frame with a set outline shape by utilizing the elastic deformation characteristic of the main reinforcement steel bars.

Fifthly, automatic feeding of arch truss ribs: and the patterned ribs connected with the main ribs of the adjacent arch frame are conveyed to the welding position by the patterned rib feeding mechanism to wait for welding with the main ribs of the arch frame.

Sixthly, automatically welding a truss type welding manipulator: the truss type welding manipulator comprising the longitudinal and transverse linear modules carries two welding guns of the welding machine, and the patterned ribs and the main ribs are welded together according to a zigzag walking track.

Seventhly, step-by-step circular welding of the grid type arch centering: two adjacent main ribs form one surface of the arch center, and a rib welding cycle is defined from the beginning of pushing one rib to be welded from the first surface to the completion of welding one rib on the last surface; after one patterned rib welding cycle is completed, the main rib pushing mechanism integrally pushes a plurality of main ribs to a position to be welded of the next patterned rib welding cycle so as to prepare for loading and welding the patterned ribs; and in the main rib pushing process, the front end of the main rib is gradually pushed out of the welding mould through a flower arch frame part formed after the flower ribs are welded.

Eighthly, cutting the grid type arch centering at a fixed length, and welding an end plate: and after the grating arch reaches a set length, manually cutting to form a required arch body, and welding the end plate and the stirrups to form an arch product.

The novel use has the following beneficial effects:

1. the automatic welding production line for the grid type arch centering can be operated by one person at a station 1 (flash butt welding automatic welding and weld finishing), a station 2 (arch centering rib material bin manual feeding) and a station 3 (arch centering end plate positioning welding, stirrup welding and fixed length cutting).

2. The welding time of the lattice type arch frame ribs is about 45 seconds per cycle (the welding length is about 0.52 meter), the welding time of the station 1 is about 3.75-5 minutes per cycle, the welding time of the station 3 is about 6 minutes per cycle, the operation time of workers at each station is sufficient, the labor intensity is low, and the method is simple and easy to implement.

3. The automatic welding production line for the grid type arch centering can produce 42 m/h. The arch frame main rib has no loss.

The foregoing shows and describes the fundamental principles and principal features of the present novel type and the advantages of the novel type. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the embodiments and descriptions are only illustrative of the principles of the utility model, and that various changes and modifications may be made without departing from the spirit and scope of the utility model, and these changes and modifications are intended to fall within the scope of the utility model as claimed. The scope of the present novel use is defined by the appended claims and equivalents thereof.

Claims (5)

1. A grid type arch center continuous welding production line is characterized by comprising a molding area, a welding forming area and a shaping area in sequence from a main rib inlet to an arch center product outlet; at least a plurality of welding clamping tools for forming a welding clamp are distributed in the molding area and the shaping area; the welding clamping fixture located in the molding area respectively restrains the single main rib of the arch frame, and the welding clamping fixture located in the molding area integrally restrains the cross section shape of the arch frame.

2. The production line of claim 1, wherein an automatic welding machine is provided in the weld forming zone.

3. The production line of claim 1, wherein a main rib pushing device is arranged at the feeding end of the welding fixture, a plurality of one-way clamping mechanisms for clamping a single main rib are arranged on the main rib pushing device, and the main rib pushing device can swing adaptively along with different pushing length requirements of the plurality of main ribs.

4. The production line of claim 1, wherein a patterned bar feeding mechanism is further arranged in the welding forming area, the patterned bar feeding mechanism is used for feeding patterned bars in the storage bin one by one and placing the patterned bars in a position to be welded, and the patterned bars can be in a posture consistent with the posture after welding.

5. The production line according to any one of claims 1 to 4, characterized by further comprising a flash welding machine for main bar lengthening welding and having a weld finishing unit.

Images