CN111843343A

CN111843343A - Butt welding machine

Info

Publication number: CN111843343A
Application number: CN202010711639.6A
Authority: CN
Inventors: 汤泽波; 徐湘华
Original assignee: Tongling Tongfei Technology Co ltd
Current assignee: Tongling Tongfei Technology Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-10-30

Abstract

The invention belongs to the technical field of welding machines, and particularly relates to a butt welding machine which comprises a workbench and a fixed clamping unit; the fixed clamping unit comprises a first plate, a first screw rod, a fixed hinge seat, a movable hinge seat and a clamping plate; the other side of the workbench is provided with a movable clamping unit, the movable clamping unit is arranged opposite to the fixed clamping unit, and the fixed clamping unit is matched with the movable clamping unit to realize stable clamping of the welded workpiece; the motor drives the first screw rod to rotate, the clamping radius of the clamping plate is adjusted, the clamping device is applicable to wide range, the welded workpiece with any radius can be stably clamped, and meanwhile, the clamping plate in the fixed clamping unit and the clamping plate in the movable clamping unit are matched, so that the welded workpiece is firmly and stably clamped between the clamping plates.

Description

Butt welding machine

Technical Field

The invention belongs to the technical field of welding machines, and particularly relates to a butt welding machine.

Background

The welding machine has various types, such as single-point single function, single-point double function and single-point multiple function (the welding machine also has only one welding head, and can weld any angle between 90 degrees and 180 degrees after the form of the positioning plate is changed). And two-point, three-point, four-point and even six-point welding machines, four-corner welding machines and the like. Different types of welders also have different welding functions and work efficiencies.

When a welded workpiece is clamped on an existing welding machine, the welded workpiece is generally made of an iron material and has certain elasticity, when a welder master welds the welded workpiece, particularly a curled cylindrical plate, and after the welded plate is fixedly clamped, the welded plate can have a phenomenon of welding seam deviation in the welding process due to the elasticity of the welder master, so that the welded seam of the welded plate is not firm and uneven, and the quality of the welded workpiece is influenced.

Disclosure of Invention

The invention provides a butt welding machine, which aims to make up the defects of the prior art and solve the problems that after a welded plate is fixedly clamped, the welded joint of the welded plate is not firm and uneven and the quality of a welded workpiece is influenced due to the fact that the welded plate has a phenomenon of welding joint deviation in the welding process because of the elasticity of the welded plate.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a butt welding machine, which comprises a workbench and a fixed clamping unit; the fixed clamping unit comprises a first plate, a first screw rod, a fixed hinge seat, a movable hinge seat and a clamping plate; the first plate is fixedly connected to one side of the workbench, a motor fixedly connected to the workbench is arranged behind the first plate, an output shaft of the motor penetrates through the center of the first plate and is fixedly connected with one end of a screw rod, the output shaft of the motor is in clearance fit with the first plate, the other end of the first screw rod is a cross-shaped clamping groove, a fixed hinge seat is arranged at the center of the front side wall of the first plate, a movable hinge seat opposite to the fixed hinge seat is connected to the outer ring of the first screw rod through balls, two ends of a clamping plate are hinged between the movable hinge seat and the fixed hinge seat through a first rod which is mutually crossed, and the section of the clamping plate is U-shaped; a movable clamping unit is arranged on the other side of the workbench and is opposite to the fixed clamping unit, a second plate arranged in the movable clamping unit is clamped in a guide groove formed in the workbench, one end of a second lead screw arranged in the movable clamping unit is hinged to a first plate in the movable clamping unit, and the other end of the second lead screw is a cross-shaped clamping block; the fixed clamping unit is matched with the movable clamping unit to realize stable clamping of the welded workpiece; when the welding machine works, the movable clamping unit on the workbench moves through the guide groove, when a cylindrical workpiece to be welded which is not welded can be placed between the fixed clamping unit and the movable clamping unit, the movable clamping unit stops moving, one end of the workpiece to be welded is inserted into the clamping plate on the fixed clamping unit, then the movable clamping unit is moved, the clamping plate on the movable clamping unit is clamped at the other end of the workpiece to be welded, the clamping block on the second lead screw is embedded into the clamping groove on the first lead screw at the moment, then the motor is started, the motor rotates to drive the first lead screw to rotate, and then the first lead screw drives the second lead screw to rotate through the matching between the clamping groove and the clamping block; because the balls are arranged in the movable hinging seat, when the first screw rod rotates, the first screw rod enables the movable hinging seat to move on the screw rod, when the movable hinging seat moves towards the first plate, the movable hinging seat pushes the first rod, then the first rod rotates around the joint point of the first rod, the first rod rotates to push the clamping plate to move away from the first rod, and meanwhile, the radius of a welded workpiece in the clamping plate is gradually enlarged; when the movable hinge seat moves away from the first plate, the movable hinge seat pulls the first rod, then the first rod rotates around the first rod in a hinge mode, the first rod rotates to pull the clamping plate to move towards the direction close to the first rod, and meanwhile the radius of a workpiece to be welded of the clamping plate is gradually reduced; the motor drives the first screw rod to rotate, the clamping radius of the clamping plate is adjusted, the clamping device is applicable to wide range, the welded workpiece with any radius can be stably clamped, and meanwhile, the clamping plate in the fixed clamping unit and the clamping plate in the movable clamping unit are matched, so that the welded workpiece is firmly and stably clamped between the clamping plates.

Preferably, each first rod is provided with a stabilizing unit at a hinge point which is intersected with each other; the stabilizing unit comprises a first disc, a sleeve, a mandril and a first spring; the center position of the first disc is hinged to the outer ring of the first lead screw, a sleeve is fixedly connected to the outer ring of the first disc uniformly and corresponds to a hinge point of the first rod, one end of a push rod is connected to the interior of the sleeve through a first spring, and the other end of the push rod is connected to the hinge point of the first rod; the first rod is prevented from rotating around the mutually crossed hinge points through the stabilizing unit; when the welding fixture works, if a welded workpiece clamped by the clamping plate has elasticity, the elastic welded workpiece can push the clamping plate to move or extrude the clamping plate to move towards the central axis direction of the first screw rod, and when the clamping plate moves, the welded workpiece can change the originally adjusted size radius, so that the seam of the welded workpiece has deviation, and the welded workpiece is welded insecurely; in order to prevent that the grip block from removing, a pole department pin joint at intercrossing sets up firm unit, connect the hinge point department at a pole through the ejector pin, when the cross pin joint of a pole was kept away from a lead screw, a spring pulls a pole through the ejector pin, make a pole firm motionless, when the cross pin joint of a pole is close to a lead screw, a spring pushes away a pole through the ejector pin, make a pole firm motionless, thereby avoided the grip block to be extruded by the weldment and removed, guaranteed then by the weldment can keep the radius size who adjusts.

Preferably, a pressing unit is arranged between the first plate and the motor; the pressing unit comprises a first rotary table, a connecting rod, a second rod and a pressing block; the center of the first rotary table is fixedly connected to an output shaft of the motor, the first rotary table is uniformly hinged with a connecting rod, the connecting rod is connected with the pressing block through a second rod, and the second rod penetrates through a sliding groove formed in the outer ring of the first plate; the welded workpiece is further stabilized through the pressing unit; the during operation, the motor rotates, the output shaft of motor drives a carousel and rotates, the connecting rod is dragged and rotates when a carousel rotates, connecting rod pulling No. two poles simultaneously, No. two poles remove in the sliding tray, No. two pole stimulations simultaneously press the briquetting and be close to by welded workpiece, finally press the briquetting tightly on the outer lane by welded workpiece, make by welded workpiece firmly fastened on solid top clamping unit once more, avoided appearing not hard up emergence of phenomenon by welded workpiece, thereby it is more accurate to be put by welding on the welded workpiece.

Preferably, a pressing plate is arranged on the bottom surface of each pressing block, and a plurality of rollers are arranged on the lower end surface of each pressing plate; the contact surface of the pressing block and the welded workpiece is increased through the pressing plate, and the friction force between the pressing plate and the welded workpiece is reduced through the roller; when the welding fixture works, when the pressing block presses a welded workpiece, the pressing block is attached to the welded workpiece through the pressing plate, and the contact surface between the pressing block and the welded workpiece is enlarged, so that the welded workpiece is further fastened; when the outer ring surface of the welded workpiece is rough, the welded workpiece is pressed unevenly by the pressing plate, namely the pressure acting on the welded workpiece by the pressing plate is uneven, so that the welding seam of the welded workpiece is irregular; the roller is arranged on the pressing plate, the roller can roll on the welded workpiece, sliding friction between the pressing plate and the welded workpiece is replaced by rolling friction between the roller and the welded workpiece, so that the pressing plate can uniformly press the acting force of the pressing plate on the welded workpiece through the roller, and the welding position on the welded workpiece can be accurately welded.

Preferably, a through hole is formed in the second screw rod, a third rod is arranged in the through hole, a sliding block is arranged on an outer ring at the middle position of the third rod, a sliding groove corresponding to the sliding block is formed in the through hole, a third spring is arranged on one side of the sliding block, the third rod is connected into the through hole through the third spring, one end of the third rod penetrates through the clamping block and extends out of the clamping block, and the other end of the third rod penetrates through the second plate and is connected into a triangular groove formed in the center position of the second plate through a triangular chuck; through the cooperation among the third rod, the sliding block, the sliding groove, the triangular chuck and the triangular clamping groove, the second lead screw is prevented from rotating automatically; when the screw driver works, when the clamping block on the second screw rod is clamped into the clamping groove on the first screw rod, the clamping groove extrudes the third rod in the through hole, then the third rod pushes the triangular chuck to move out of the triangular clamping groove, and the first screw rod rotates through the matching between the clamping groove and the clamping block; when the welded workpiece is welded, the movable clamping unit moves along the guide groove, and then the welded workpiece is taken down; the clamping groove is not connected with the clamping block, if the welded workpiece is taken down, the welded workpiece pushes the clamping plate to move, the clamping plate drives the movable hinge seat to move through the first rod, then the movable hinge seat rubs the second lead screw to rotate, and after the second lead screw rotates, when the clamping block on the second lead screw is in butt joint with the clamping groove on the first lead screw again, the clamping block is difficult to be embedded into the clamping groove; when the joint piece was separated with the joint groove, No. three poles under the effect of No. three springs, No. three pole pulling triangle chuck embedding triangle draw-in groove, then under the cooperation between slip piece and the sliding groove for No. two lead screws are fastened on No. two boards, and No. two lead screws can not rotate promptly, guarantee the joint piece when breaking away from the joint groove, also can guarantee initial condition, make joint piece can successfully dock with the joint groove next time.

Preferably, the outer ring of the first screw rod is provided with a second spring, and the second spring is positioned between the movable hinge seat and the clamping groove; the movable hinge seat is prevented from moving on the first screw rod through the second spring; during operation, after the size radius is adjusted by the welding work piece on the clamping plate, in order to prevent from being extruded by the welding work piece, the clamping plate becomes flexible, the swing hinge seat is extruded through the second spring, so that the swing hinge seat can push the first rod at all times, and the first rod pushes the clamping plate again, so that the clamping plate always pushes against the welding work piece, thereby avoiding being extruded by the welding machine work piece, and leading to the occurrence of the size radius change phenomenon of the welding work piece.

The invention has the technical effects and advantages that:

1. according to the butt welding machine, the first screw rod is driven to rotate through the motor, the clamping radius of the clamping plates is adjusted, the butt welding machine is wide in application range, workpieces to be welded with any radius can be stably clamped, and meanwhile, the clamping plates in the fixed clamping unit and the clamping plates in the movable clamping unit are matched, so that the workpieces to be welded are firmly and stably fixed between the clamping plates.

2. According to the butt welding machine, the motor drives the first rotary table to rotate, the connecting rod is pulled to rotate when the first rotary table rotates, the connecting rod pulls the second rod, the second rod moves in the sliding groove, the second rod pulls the pressing block to be close to a welded workpiece, and finally the pressing block is tightly pressed on the outer ring of the welded workpiece, so that the welded workpiece is firmly fastened on the fixed-top clamping unit again, the phenomenon that the welded workpiece is loosened is avoided, and the welding position on the welded workpiece is more accurate.

Drawings

The invention is further described with reference to the following figures and embodiments.

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

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is an enlarged view of a portion of FIG. 1 at C;

FIG. 5 is a cross-sectional view of the stabilization unit;

FIG. 6 is a cross-sectional view of the second lead screw;

FIG. 7 is an isometric view of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 7 at D;

in the figure: the clamping device comprises a workbench 1, a motor 11, a guide groove 12, a fixed clamping unit 2, a first plate 21, a sliding groove 211, a first screw rod 22, a clamping groove 221, a second spring 222, a fixed hinged seat 23, a first rod 231, a movable hinged seat 24, a clamping plate 25, a movable clamping unit 3, a second plate 31, a triangular groove 311, a second screw rod 32, a clamping block 321, a stabilizing unit 4, a first disc 41, a sleeve 42, a push rod 43, a first spring 44, a pressing unit 5, a first rotary disc 51, a connecting rod 52, a second rod 53, a pressing block 54, a pressing plate 541, a through hole 6, a third rod 61, a sliding block 611, a sliding groove 62, a third spring 63 and a triangular chuck 64.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following embodiments.

As shown in fig. 1 to 8, a butt welding machine according to the present invention includes a table 1 and a fixed clamp unit 2; the fixed clamping unit 2 comprises a first plate 21, a first screw rod 22, a fixed hinge seat 23, a movable hinge seat 24 and a clamping plate 25; the first plate 21 is fixedly connected to one side of the workbench 1, the motor 11 fixedly connected to the workbench 1 is arranged behind the first plate 21, an output shaft of the motor 11 penetrates through the center of the first plate 21 and is fixedly connected with one end of a screw rod, the output shaft of the motor 11 is in clearance fit with the first plate 21, the other end of the first screw rod 22 is a cross-shaped clamping groove 221, a fixed hinge seat 23 is arranged at the center of the front side wall of the first plate 21, a movable hinge seat 24 opposite to the fixed hinge seat is connected to the outer ring of the first screw rod 22 through a ball, two ends of a clamping plate 25 are hinged between the movable hinge seat 24 and the fixed hinge seat 23 through a first rod 231 which is mutually crossed, and the section of the clamping plate 25 is in a U shape; a movable clamping unit 3 is arranged on the other side of the workbench 1, the movable clamping unit 3 is arranged opposite to the fixed clamping unit 2, a second plate 31 arranged in the movable clamping unit 3 is clamped in a guide groove 12 formed in the workbench 1, one end of a second screw rod 32 arranged in the movable clamping unit 3 is hinged to the second plate 31 in the movable clamping unit 3, and the other end of the second screw rod 32 is a cross-shaped clamping block 321; the fixed clamping unit 2 is matched with the movable clamping unit 3, so that the welded workpiece is stably clamped; when the welding machine works, firstly, the movable clamping unit 3 on the workbench 1 moves through the guide groove 12, when a cylindrical unwelded workpiece to be welded can be placed between the fixed clamping unit 2 and the movable clamping unit 3, the movable clamping unit 3 stops moving, then one end of the workpiece to be welded is inserted into the clamping plate 25 on the fixed clamping unit 2, then the movable clamping unit 3 is moved, the clamping plate 25 on the movable clamping unit 3 is clamped at the other end of the workpiece to be welded, at the moment, the clamping block 321 on the second lead screw 32 is embedded into the clamping groove 221 on the first lead screw 22, then the motor 11 is started, the motor 11 rotates to drive the first lead screw 22 to rotate, and then the first lead screw 22 drives the second lead screw 32 to rotate through the matching between the clamping groove 221 and the clamping block 321; because the ball is arranged in the movable hinge seat 24, when the first screw rod 22 rotates, the first screw rod 22 enables the movable hinge seat 24 to move on the screw rod, when the movable hinge seat 24 moves towards the first plate 21, the movable hinge seat 24 pushes the first rod 231, then the first rod 231 rotates around the intersection point of the first rod 231, the first rod 231 rotates to push the clamping plate 25 to move towards the direction far away from the first rod 231, and meanwhile, the radius of a welded workpiece in the clamping plate 25 is gradually enlarged; when the movable hinge seat 24 moves away from the first plate 21, the first rod 231 is pulled by the movable hinge seat 24, then the first rod 231 rotates around the first rod 231 in a hinge manner, the first rod 231 rotates to pull the clamping plate 25 to move towards the direction close to the first rod 231, and meanwhile, the radius of the workpiece to be welded of the clamping plate 25 is gradually reduced; the motor 11 drives the first screw rod 22 to rotate, the clamping radius of the clamping plate 25 is adjusted, the clamping device is applicable to wide range, any radius workpiece to be welded can be stably clamped, and meanwhile, the clamping plate 25 in the fixed clamping unit 2 and the clamping plate 25 in the movable clamping unit 3 are matched, so that the workpiece to be welded is firmly and stably clamped between the clamping plates 25.

As a specific embodiment of the present invention, a fixing unit 4 is disposed at a hinge point where the first rods 231 intersect with each other; the stabilizing unit 4 comprises a first disc 41, a sleeve 42, a mandril 43 and a first spring 44; the center position of the first disc 41 is hinged to the outer ring of the first lead screw 22, a sleeve 42 is fixedly connected to the outer ring of the first disc 41 uniformly, the hinge point of the sleeve 42 and the first rod 231 corresponds to each other, one end of a top rod 43 is connected to the interior of the sleeve 42 through a first spring 44, and the other end of the top rod 43 is connected to the hinge point of the first rod 231; the first lever 231 is prevented from rotating around the hinge point where the first lever 231 and the second lever intersect with each other by the stabilizing unit 4; when the welding fixture works, if a welded workpiece clamped by the clamping plate 25 has elasticity, the elastic welded workpiece can push the clamping plate 25 to move, or the clamping plate 25 is extruded to move towards the central axis direction of the first screw rod 22, and when the clamping plate 25 moves, the welded workpiece can change the originally adjusted size radius, so that the seam of the welded workpiece has deviation, and the welded workpiece is welded insecurely; in order to prevent the clamping plate 25 from moving, a stable unit 4 is arranged at a hinge point of the first rod 231 which is mutually crossed, the first rod 231 is connected to the hinge point of the first rod 231 through the ejector rod 43, when the cross hinge point of the first rod 231 is far away from the first lead screw 22, the first spring 44 pulls the first rod 231 through the ejector rod 43, the first rod 231 is stable and immovable, when the cross hinge point of the first rod 231 is close to the first lead screw 22, the first spring 44 pushes the first rod 231 through the ejector rod 43, the first rod 231 is stable and immovable, the clamping plate 25 is prevented from being pushed and moved by a welding workpiece, and the well-adjusted radius size of the welding workpiece is guaranteed.

As a specific embodiment of the present invention, a pressing unit 5 is disposed between the first plate 21 and the motor 11; the pressing unit 5 comprises a first rotary disc 51, a connecting rod 52, a second rod 53 and a pressing block 54; the center of the first rotary disc 51 is fixedly connected to the output shaft of the motor 11, the first rotary disc 51 is uniformly hinged with a connecting rod 52, the connecting rod 52 is connected with a pressing block 54 through a second rod 53, and the second rod 53 penetrates through a sliding groove 211 formed in the outer ring of the first plate 21; the welded workpiece is further stabilized by the pressing unit 5; during operation, when motor 11 rotates, motor 11's output shaft drives a carousel 51 and rotates, carousel 51 pulls connecting rod 52 and rotates when rotating, connecting rod 52 pulls No. two poles 53 simultaneously, No. two poles 53 remove in sliding tray 211, No. two poles 53 pull simultaneously and press down piece 54 and be close to by welding workpiece, finally press down that piece 54 tightly presses down on by welding workpiece's outer lane, make by welding workpiece firmly fastened on solid top clamping unit once more, avoided by welding workpiece the emergence of not hard up phenomenon to appear, thereby it is more accurate to be put by welding on the welding workpiece.

As an embodiment of the present invention, a pressing plate 541 is disposed on a bottom surface of each pressing block 54, and a plurality of rollers are disposed on a lower end surface of the pressing plate 541; the contact surface between the pressing block 54 and the workpiece to be welded is increased by the pressing plate 541, and the friction force between the pressing block 54 and the workpiece to be welded is reduced by the roller; in operation, when the pressing block 54 presses the workpiece to be welded, the pressing block 54 is attached to the workpiece to be welded via the pressing plate 541, and the contact surface between the pressing block 54 and the workpiece to be welded is increased, so that the workpiece to be welded is further fastened; when the pressing plate 541 presses a workpiece to be welded, the pressing plate 541 generates sliding friction on the workpiece to be welded, and if the outer ring surface of the workpiece to be welded is rough and the pressing plate 541 slides on the workpiece to be welded, the pressing of the workpiece to be welded by the pressing plate 541 is not uniform, that is, the pressing force of the pressing plate 541 on the workpiece to be welded is not uniform, the welding seam of the workpiece to be welded is not regular; the roller is arranged on the pressing plate 541, the roller can roll on the welded workpiece, sliding friction between the pressing plate 541 and the welded workpiece is replaced by rolling friction between the roller and the welded workpiece, so that the pressing plate 541 can uniformly press the acting force of the pressing plate 541 on the welded workpiece through the roller, and the welding position on the welded workpiece can be accurately welded.

As a specific embodiment of the present invention, a through hole 6 is formed in the second lead screw 32, a third rod 61 is arranged in the through hole 6, a sliding block 611 is arranged on an outer ring of a middle position of the third rod 61, a sliding groove 62 corresponding to the sliding block 611 is formed in the through hole 6, a third spring 63 is arranged on one side of the sliding block 611, the third rod 61 is connected in the through hole 6 through the third spring 63, one end of the third rod 61 passes through the clamping block 321 and extends out of the clamping block 321, and the other end of the third rod 61 passes through the second plate 31 and is connected in a triangular groove 311 formed in a center position of the second plate 31 through a triangular chuck 64; the third rod 61, the sliding block 611, the sliding groove 62, the triangular chuck 64 and the triangular groove 311 are matched with each other, so that the second screw rod 32 is prevented from rotating automatically; when the screw driver works, when the clamping block 321 on the second screw rod 32 is clamped into the clamping groove 221 on the first screw rod 22, the clamping groove 221 extrudes the third rod 61 in the through hole 6, then the third rod pushes the triangular chuck 64 to move out of the triangular groove 311, and the first screw rod 22 enables the second screw rod 32 to rotate through the matching between the clamping groove 221 and the clamping block 321; when the welded workpiece is welded, the movable clamping unit 3 moves along the guide groove 12, and then the welded workpiece is taken down; at the moment, the clamping groove 221 is not connected with the clamping block 321, if the welded workpiece is taken down, the welded workpiece pushes the clamping plate 25 to move, then the clamping plate 25 drives the movable hinge seat 24 to move through the first rod 231, then the movable hinge seat 24 twists the second lead screw 32 to rotate, and after the second lead screw 32 rotates, when the clamping block 321 on the second lead screw 32 is butted with the clamping groove 221 on the first lead screw 22 again, the clamping block 321 is difficult to be embedded into the clamping groove 221; when the clamping block 321 is separated from the clamping groove 221, the third rod 61 pulls the triangular chuck 64 to be embedded into the clamping groove 221 under the action of the third spring 63, and then the second lead screw 32 is fastened on the second plate 31 under the matching of the sliding block 611 and the sliding groove 62, namely the second lead screw 32 cannot rotate, so that the initial state can be ensured when the clamping block 321 is separated from the clamping groove 221, and the clamping block 321 can be successfully butted with the clamping groove 221 next time.

As a specific embodiment of the present invention, a second spring 222 is disposed on an outer ring of the first lead screw 22, and the second spring 222 is located between the movable hinge seat 24 and the clamping groove 221; the second spring 222 prevents the movable hinge seat 24 from moving on the first screw rod 22; in operation, after being adjusted the size radius by the welding work piece on the grip block 25, in order to prevent to be extruded grip block 25 by the welding work piece, the emergence of the not hard up phenomenon of grip block 25 appears, through No. two spring 222 extrusion swing joint seat 24, make swing joint seat 24 can always push away No. one pole 231, No. one pole 231 promotes grip block 25 again, make grip block 25 push against always by the welding work piece, thereby when avoiding being extruded grip block 25 by the welding work piece, lead to appearing the emergence that the size radius changes the phenomenon by the welding work piece.

When the welding machine works, firstly, the movable clamping unit 3 on the workbench 1 moves through the guide groove 12, when a cylindrical unwelded workpiece to be welded can be placed between the fixed clamping unit 2 and the movable clamping unit 3, the movable clamping unit 3 stops moving, then one end of the workpiece to be welded is inserted into the clamping plate 25 on the fixed clamping unit 2, then the movable clamping unit 3 is moved, the clamping plate 25 on the movable clamping unit 3 is clamped at the other end of the workpiece to be welded, at the moment, the clamping block 321 on the second lead screw 32 is embedded into the clamping groove 221 on the first lead screw 22, then the motor 11 is started, the motor 11 rotates to drive the first lead screw 22 to rotate, and then the first lead screw 22 drives the second lead screw 32 to rotate through the matching between the clamping groove 221 and the clamping block 321; because the ball is arranged in the movable hinge seat 24, when the first screw rod 22 rotates, the first screw rod 22 enables the movable hinge seat 24 to move on the screw rod, when the movable hinge seat 24 moves towards the first plate 21, the movable hinge seat 24 pushes the first rod 231, then the first rod 231 rotates around the intersection point of the first rod 231, the first rod 231 rotates to push the clamping plate 25 to move towards the direction far away from the first rod 231, and meanwhile, the radius of a welded workpiece in the clamping plate 25 is gradually enlarged; when the movable hinge seat 24 moves away from the first plate 21, the first rod 231 is pulled by the movable hinge seat 24, then the first rod 231 rotates around the first rod 231 in a hinge manner, the first rod 231 rotates to pull the clamping plate 25 to move towards the direction close to the first rod 231, and meanwhile, the radius of the workpiece to be welded of the clamping plate 25 is gradually reduced; the first screw rod 22 is driven to rotate by the motor 11, the clamping radius of the clamping plate 25 is adjusted, the range is wide, workpieces to be welded with any radius can be stably clamped, and meanwhile, the clamping plate 25 in the fixed clamping unit 2 is matched with the clamping plate 25 in the movable clamping unit 3, so that the workpieces to be welded are firmly and stably fixed between the clamping plates 25; if the welded workpiece clamped by the clamping plate 25 has elasticity, the elastic welded workpiece can push the clamping plate 25 to move or extrude the clamping plate 25 to move towards the central axis direction of the first screw rod 22, and when the clamping plate 25 moves, the welded workpiece can change the originally adjusted size radius, so that the seam of the welded workpiece has deviation, and the welded workpiece is welded insecurely; in order to prevent the clamping plate 25 from moving, a stable unit 4 is arranged at a hinge point of the first rods 231 which are mutually crossed, the stable unit is connected to the hinge point of the first rod 231 through a top rod 43, when the cross hinge point of the first rod 231 is far away from the first lead screw 22, the first spring 44 pulls the first rod 231 through the top rod 43, so that the first rod 231 is stable and immovable, and when the cross hinge point of the first rod 231 is close to the first lead screw 22, the first spring 44 pushes the first rod 231 through the top rod 43, so that the first rod 231 is stable and immovable, the clamping plate 25 is prevented from being extruded and moved by a welding workpiece, and the well-adjusted radius size of the welding workpiece is ensured; when the motor 11 rotates, the output shaft of the motor 11 drives the first rotating disc 51 to rotate, the first rotating disc 51 pulls the connecting rod 52 to rotate when rotating, meanwhile, the connecting rod 52 pulls the second rod 53, the second rod 53 moves in the sliding groove 211, meanwhile, the second rod 53 pulls the pressing block 54 to be close to the welded workpiece, and finally, the pressing block 54 tightly presses the outer ring of the welded workpiece, so that the welded workpiece is firmly fastened on the fixed-top clamping unit again, the phenomenon that the welded workpiece is loosened is avoided, and the welding position on the welded workpiece is more accurate; when the pressing block 54 presses the workpiece to be welded, the pressing block 54 is attached to the workpiece to be welded by the pressing plate 541, and the contact surface between the pressing block 54 and the workpiece to be welded is increased, so that the workpiece to be welded is further fastened; when the pressing plate 541 presses a workpiece to be welded, the pressing plate 541 generates sliding friction on the workpiece to be welded, and if the outer ring surface of the workpiece to be welded is rough and the pressing plate 541 slides on the workpiece to be welded, the pressing of the workpiece to be welded by the pressing plate 541 is not uniform, that is, the pressing force of the pressing plate 541 on the workpiece to be welded is not uniform, the welding seam of the workpiece to be welded is not regular; the roller is arranged on the pressing plate 541, the roller can roll on the welded workpiece, and sliding friction between the pressing plate 541 and the welded workpiece is replaced by rolling friction between the roller and the welded workpiece, so that the pressing plate 541 can uniformly press the acting force of the pressing plate 541 on the welded workpiece through the roller, and the welding position on the welded workpiece can be accurately welded; when the clamping block 321 on the second lead screw 32 is clamped into the clamping groove 221 on the first lead screw 22, the clamping groove 221 extrudes the third rod 61 in the through hole 6, and then the third rod pushes the triangular chuck 64 to move out of the triangular groove 311, so that the first lead screw 22 rotates through the matching between the clamping groove 221 and the clamping block 321, and the second lead screw 32 rotates; when the welded workpiece is welded, the movable clamping unit 3 moves along the guide groove 12, and then the welded workpiece is taken down; at the moment, the clamping groove 221 is not connected with the clamping block 321, if the welded workpiece is taken down, the welded workpiece pushes the clamping plate 25 to move, then the clamping plate 25 drives the movable hinge seat 24 to move through the first rod 231, then the movable hinge seat 24 twists the second lead screw 32 to rotate, and after the second lead screw 32 rotates, when the clamping block 321 on the second lead screw 32 is butted with the clamping groove 221 on the first lead screw 22 again, the clamping block 321 is difficult to be embedded into the clamping groove 221; when the clamping block 321 is separated from the clamping groove 221, the third rod 61 pulls the triangular chuck 64 to be embedded into the clamping groove 221 under the action of the third spring 63, and then the second lead screw 32 is fastened on the second plate 31 under the matching between the sliding block 611 and the sliding groove 62, namely the second lead screw 32 cannot rotate, so that the initial state can be ensured when the clamping block 321 is separated from the clamping groove 221, and the clamping block 321 can be successfully butted with the clamping groove 221 next time; after the size radius is adjusted by the welding workpiece on the clamping plate 25, in order to prevent from being extruded by the welding workpiece to the clamping plate 25, the occurrence of the loosening phenomenon of the clamping plate 25 occurs, the movable hinge seat 24 is extruded through the second spring 222, so that the movable hinge seat 24 can push the first rod 231 at all times, the first rod 231 pushes the clamping plate 25 again, so that the clamping plate 25 pushes the welding workpiece all the time, and the occurrence of the change phenomenon of the size radius of the welding workpiece is caused when the clamping plate 25 is prevented from being extruded by the welding workpiece.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A butt welding machine characterized by: comprises a workbench (1) and a fixed clamping unit (2); the fixed clamping unit (2) comprises a first plate (21), a first screw rod (22), a fixed hinge seat (23), a movable hinge seat (24) and a clamping plate (25); the first plate (21) is fixedly connected to one side of the workbench (1), a motor (11) fixedly connected to the workbench (1) is arranged behind the first plate (21), an output shaft of the motor (11) penetrates through the center of the first plate (21) to be fixedly connected with one end of a screw rod, the output shaft of the motor (11) is in clearance fit with the first plate (21), the other end of the first screw rod (22) is a cross-shaped clamping groove (221), a fixed hinge seat (23) is arranged in the center of the front side wall of the first plate (21), a movable hinge seat (24) opposite to the fixed hinge seat is connected to the outer ring of the first screw rod (22) through balls, two ends of a clamping plate (25) are hinged between the movable hinge seat (24) and the fixed hinge seat (23) through a first rod (231) which is crossed with each other, and the clamping plate (25) is in a U-shaped section; a movable clamping unit (3) is arranged on the other side of the workbench (1), the movable clamping unit (3) is arranged opposite to the fixed clamping unit (2), a second plate (31) arranged in the movable clamping unit (3) is clamped in a guide groove (12) formed in the workbench (1), one end of a second screw rod (32) arranged in the movable clamping unit (3) is hinged to the second plate (31) in the movable clamping unit (3), and the other end of the second screw rod (32) is a cross-shaped clamping block (321); the fixed clamping unit (2) and the movable clamping unit (3) are matched with each other, so that the welded workpiece is stably clamped.

2. A butt welder according to claim 1, characterized in that: a stabilizing unit (4) is arranged at the hinged point of each first rod (231) which is crossed with each other; the stabilizing unit (4) comprises a first disc (41), a sleeve (42), a push rod (43) and a first spring (44); the center position of the first disc (41) is hinged to the outer ring of the first screw rod (22), a sleeve (42) is fixedly connected to the outer ring of the first disc (41) uniformly, a hinged point of the sleeve (42) and the first rod (231) corresponds to each other, one end of a push rod (43) is connected to the interior of the sleeve (42) through a first spring (44), and the other end of the push rod (43) is connected to the hinged point of the first rod (231); the first lever 231 is prevented from rotating about its hinge point where they cross each other by the stabilizing unit 4.

3. A butt welder according to claim 2, characterized in that: a pressing unit (5) is arranged between the first plate (21) and the motor (11); the pressing unit (5) comprises a first rotary table (51), a connecting rod (52), a second rod (53) and a pressing block (54); the center of the first rotary table (51) is fixedly connected to an output shaft of the motor (11), the first rotary table (51) is uniformly hinged with a connecting rod (52), the connecting rod (52) is connected with a pressing block (54) through a second rod (53), and the second rod (53) penetrates through a sliding groove (211) formed in the outer ring of the first plate (21); the workpiece to be welded is further stabilized by the pressing unit (5).

4. A butt welder according to claim 3, characterized in that: a pressing plate (541) is arranged on the bottom surface of each pressing block (54), and a plurality of rollers are arranged on the lower end surface of each pressing plate (541); the contact surface between the pressing block (54) and the workpiece to be welded is increased by the pressing plate (541), and the friction force between the pressing block (54) plate and the workpiece to be welded is reduced by the roller.

5. A butt welder according to claim 4, characterized in that: a through hole (6) is formed in the second screw rod (32), a third rod (61) is arranged in the through hole (6), a sliding block (611) is arranged on the outer ring of the middle position of the third rod (61), a sliding groove (62) corresponding to the sliding block (611) is formed in the through hole (6), a third spring (63) is arranged on one side of the sliding block (611), the third rod (61) is connected into the through hole (6) through the third spring (63), one end of the third rod (61) penetrates through the clamping block (321) and extends out of the clamping block (321), and the other end of the third rod (61) penetrates through the second plate (31) and is connected into a triangular groove (311) formed in the center position of the second plate (31) through a triangular chuck (64); through the cooperation among the third rod (61), the sliding block (611), the sliding groove (62), the triangular chuck (64) and the triangular groove (311), the second screw rod (32) is prevented from rotating automatically.

6. A butt welder according to claim 5, characterized in that: a second spring (222) is arranged on the outer ring of the first screw rod (22), and the second spring (222) is positioned between the movable hinge seat (24) and the clamping groove (221); the movable hinge seat (24) is prevented from moving on the first screw rod (22) through a second spring (222).