CN112404832A

CN112404832A - Welding tool for steel pipe and joint

Info

Publication number: CN112404832A
Application number: CN201910769315.5A
Authority: CN
Inventors: 孙涛; 邵杰; 张阳羊; 王洪权; 刘家奎; 闫萌; 李冠朋
Original assignee: Henan Senyuan Heavy Industry Co Ltd
Current assignee: Henan Senyuan Heavy Industry Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2021-02-26

Abstract

The invention relates to a welding tool for a steel pipe and a joint. The welding frock of steel pipe and joint includes: the joint positioning part is arranged on the support and comprises a mounting arm which is used for being in plug-in fit with a joint to be welded so as to determine the position of the joint to be welded; the steel pipe clamping part is arranged on the support and comprises two clamping blocks, at least one clamping block can move along the fixed track in a guiding mode so as to be matched with the other clamping block to clamp the steel pipe to be welded, and the steel pipe to be welded and the joint to be welded are coaxially arranged; and the rotary welding part is arranged on the support and comprises a welding gun clamping arm revolving around the mounting arm, and the welding gun clamping arm can keep the welding gun head always facing the rotation axis. The welding tool can ensure the coaxiality of the steel pipe to be welded and the joint to be welded, and the welding gun clamping arm can rotate around the mounting arm under the action of the driving motor so as to weld the butt joint position of the steel pipe and the joint, so that the labor intensity of workers can be reduced, and the welding efficiency and the welding quality between the steel pipe and the joint can be improved.

Description

Welding tool for steel pipe and joint

Technical Field

The invention relates to a welding tool for a steel pipe and a joint.

Background

The steel pipe is generally applied to an air path, a water path and an oil path system of a vehicle, the steel pipe needs to be matched with a clamping sleeve nut for use, or is matched with a transition joint for use, or the steel pipe and the joint can be welded into an integral structure before assembly, so that parts are saved and assembly processes are reduced in the steel pipe assembly process. In the prior art, when a steel pipe is welded with a joint, a manual welding mode is usually adopted, the manual welding efficiency is low, the labor intensity is high, and the coaxiality and the weld quality between the steel pipe and the joint cannot be ensured in the manual welding process, so that the welding quality is poor.

Disclosure of Invention

The invention aims to provide a welding tool for a steel pipe and a joint, and aims to solve the technical problems of low welding efficiency, high labor intensity and poor welding quality caused by manual welding of the steel pipe and the joint in the prior art.

In order to achieve the purpose, the technical scheme of the welding tool for the steel pipe and the joint is as follows: the welding frock of steel pipe and joint includes: the support comprises a base and a vertical frame fixed on the base; the joint positioning part is arranged on the stand and comprises a mounting arm which is used for being in plug-in fit with a joint to be welded so as to determine the position of the joint to be welded; the steel pipe clamping part is arranged on the base and comprises a fixed track perpendicular to the mounting arm and two clamping blocks positioned on the fixed track, at least one clamping block can move along the fixed track in a guiding mode to be matched with the other clamping block to clamp the steel pipe to be welded, and the steel pipe to be welded and the joint to be welded are arranged coaxially; and the rotary welding part comprises a welding gun clamping arm, the welding gun clamping arm is provided with a driving motor so as to drive the welding gun clamping arm to revolve around the mounting arm, and in the revolving process, the welding gun clamping arm can keep the welding gun head always facing the rotation axis.

The invention has the beneficial effects that: the steel pipe to be welded and the joint to be welded can be fixed by the steel pipe clamping part and the joint positioning part in the welding tool, the coaxiality of the steel pipe to be welded and the joint to be welded can be ensured, the welding gun clamping arm can revolve around the mounting arm under the action of the driving motor, and in the revolution process, the welding gun clamping arm can keep the welding gun head always facing the rotation axis, so that the welding of the butt joint position of the steel pipe and the joint can be realized, the labor intensity of workers can be reduced, and the welding efficiency and the welding quality between the steel pipe and the joint can be improved.

Furthermore, the mounting arm comprises a cylinder fixed on the stand, a screw is assembled in the cylinder, and a joint positioning piece or a joint positioning assembly used for matching and inserting the joint to be welded is arranged at the end part of the screw. The mounting arm provided in this structure can reciprocate the joint to be welded in its axial direction for fitting joints of different length sizes to the position of the welding gun.

Further, the joint positioning assembly comprises a positioning block fixed at the end of the screw rod, and a positioning element detachably connected with the positioning block, wherein the positioning element is provided with an insertion section used for being matched and inserted with the joint to be welded. The setting of locating piece is convenient for handheld in order to realize that the screw rod moves along the direction of barrel axis, and positioning element and locating piece releasable connection can realize the change to the positioning element who has not unidimensional grafting section, make welding frock realize having the welding of not unidimensional joint and steel pipe, have better suitability.

Furthermore, a plurality of stages for matching and inserting the joints to be welded with different inner diameter sizes are arranged on the inserting section. The setting in the stage can be used for pegging graft and has the welded joint that waits of different internal diameter sizes, makes welding frock realize having better wildcard nature to the welding of the steel pipe that has different sizes and joint.

Further, both clamping blocks can move along the fixed track in a guiding mode, and the two clamping blocks are symmetrically arranged relative to the mounting arm. Two clamping blocks can move along the guide of the fixed track to realize the clamping fixation of steel pipes with different outer diameter sizes.

Furthermore, the steel pipe clamping part also comprises two cylinders which are used for driving the two clamping blocks to move synchronously and are respectively in transmission connection with the corresponding clamping blocks. The two cylinders move synchronously to ensure the synchronous movement of the two clamping blocks, so that the steel pipe to be welded is fixed at a position coaxial with the joint to be welded.

Furthermore, the clamping blocks comprise a bottom plate and two clamping plates fixed on the bottom plate, and the two clamping plates are arranged on each clamping block and extend along the axial direction of the steel pipe to be welded. Compared with a structure that a clamping surface is directly arranged on the clamping block, the clamping slide block and the clamping plate are arranged, so that the material consumption of the clamping block can be saved, the cost of a welding tool is reduced, and the clamping plate is arranged in an extending manner along the axial direction of the steel pipe to be welded, so that the welded steel pipe can be well positioned.

Furthermore, the spin welding part comprises a fixing plate which is rotatably assembled on the mounting arm, the welding gun clamping arm is fixed on the fixing plate, and a wire passing hole for passing a welding wire and a welding gun connecting wire is formed in the fixing plate. The rotary welding part arranged in the structure is convenient to realize in the invention, the fixing plate is rotatably assembled on the mounting arm, and the welding gun clamping arm is fixed on the fixing plate, so that the whole tool is compact in structure, and the placing space of the tool is reduced.

Further, welder centre gripping arm is including setting up the transfer line on the fixed plate to and be located the retaining member of transfer line tip in order to fix welder position, this retaining member includes two stay locks of connecting through hinge and buckle. Welder passes through retaining member locking fixed, and the retaining member includes two stay bars of connecting through the buckle moreover, and the retaining member simple structure that this kind of structure set up, and convenient operation.

Furthermore, a T-shaped part is arranged between the transmission rod and the locking piece, the T-shaped part is rotatably assembled at the end part of the transmission piece and is fixed on the transmission rod through a screw, and the locking piece is fixed on the T-shaped part. Through the contained angle between regulation T type spare and the driving medium to realize the regulation of welding gun head angle, can realize the flat welding, face up welding and the operation of welding down to the welding position department of steel pipe and joint.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a welding tool for a steel pipe and a joint provided by the invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a top view of FIG. 1 (showing two positions of the clamping slide);

FIG. 4 is a schematic structural view of the support of FIG. 1;

FIG. 5 is a schematic view of the fitting structure of the joint positioning assembly of FIG. 1 and a joint to be welded;

FIG. 6 is a schematic view of the fitting structure of the clamping portion of the steel pipe in FIG. 1 and the steel pipe to be welded;

FIG. 7 is a front view of the fixed track of FIG. 1;

FIG. 8 is a left side view of FIG. 7;

FIG. 9 is a top view of FIG. 7;

FIG. 10 is a front view of the clamping block of FIG. 1;

FIG. 11 is a left side view of FIG. 10;

FIG. 12 is a top view of FIG. 10;

FIG. 13 is a front view of the torch clamping arm of FIG. 1;

FIG. 14 is a left side view of FIG. 13;

FIG. 15 is a bottom view of FIG. 13;

in the figure: 1-support, 2-base plate, 3-vertical frame, 4-triangular reinforcing plate, 5-barrel, 6-screw, 7-positioning block, 8-positioning element, 9-stage, 10-clamping block, 11-mounting plate, 12-guide rail, 13-T-shaped groove, 14-bottom plate, 15-vertical plate, 16-clamping plate, 17-reinforcing plate, 18-air cylinder, 19-side plate, 20-piston rod, 21-shaft sleeve, 22-driving motor, 23-fixing plate, 24-wire through hole, 25-small gear, 26-large gear, 27-transmission rod, 28-locking piece, 29-T-shaped piece, 30-screw, 31-joint to be welded and 32-steel pipe to be welded.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

The specific embodiment of the welding tool for the steel pipe and the joint comprises the following steps:

as shown in fig. 1 to 4, the welding fixture for the steel pipe and the joint includes a support 1, the support 1 is configured to be disposed on a workbench, the support 1 includes a base and a stand 3 fixed on the base, and the stand 3 has a plate-shaped structure. As shown in fig. 4, the base includes four legs and a base plate 2 welded above the legs, the stand 3 is welded on the base plate 2, and a triangular reinforcing plate 4 is further disposed between the stand 3 and the base plate 2.

As shown in fig. 1 to 3, the welding tool further includes a joint positioning portion provided on the stand 3, and the joint positioning portion includes a mounting arm fixed on the stand 3, the mounting arm being used for being in insertion fit with the joint 31 to be welded to determine the position of the joint 31 to be welded. In this embodiment, the mounting arm includes a barrel 5 welded on the stand 3, the axis of the barrel 5 is perpendicular to the stand 3, a screw rod 6 is assembled in the barrel 5, the end of the screw rod 6 is provided with a joint positioning component for matching and inserting with the joint 31 to be welded, for a plurality of joints 31 to be welded with different axial lengths, the adjustment of the axial positions of the joints 31 to be welded can be realized by adjusting the relative positions of the screw rod 6 and the barrel 5, so as to be used for matching with the axial position of the welding gun.

In other embodiments, the mounting arm may further include a mounting rod welded to the stand, and an end of the mounting rod is provided with a joint positioning component for matching and inserting with the joint to be welded.

The joint positioning assembly comprises a positioning block 7 fixed at the end of the screw rod 6 and a positioning element 8 detachably connected with the positioning block 7. In this embodiment, as shown in fig. 1, 3 and 5, the positioning block 7 is welded at the end of the screw rod 6, and the positioning block 7 has a hexagonal prism structure so that an operator can conveniently hold the positioning block with a tool to adjust the length of the screw rod 6 extending out of the barrel 5. 7 central point of locating piece puts the department and is provided with the screw hole, 8 one ends of positioning element are provided with the external screw thread with screw hole complex to realize 7 and 8 removable assemblings of positioning element, the 8 other ends of positioning element are provided with and are used for waiting that welded joint 31 coincide to insert the grafting section of joining in marriage, above-mentioned 7 and 8 detachable connected modes of positioning element, be convenient for to 8 changes of positioning element, in order to be used for the adaptation to have different specification and dimension wait welded joint 31, make the welding frock have better suitability.

In other embodiments, the positioning block is not arranged, the end part of the screw rod is provided with a threaded hole, and the positioning element is directly detachably connected with the screw rod, so that the welding tool is adaptive to joints to be welded with different specifications and sizes, and the positioning element forms a joint positioning element; or in other embodiments, the end of the screw rod is welded with a positioning block, and the positioning element is welded on the positioning block, so that the positioning element is matched with a joint to be welded with a fixed specification and size, and the whole welding tool has specificity.

In this embodiment, as shown in fig. 5, a hexagonal prism section is disposed between the insertion section and the threaded section of the positioning element 8, so that an operator can fixedly connect the positioning element 8 and the positioning block 7. The inserting section is provided with five step sections 9 which are matched and inserted with the joints 31 to be welded with different inner diameter sizes, so that the same positioning element 8 can be used for matching the five joints 31 to be welded with different sizes, and the welding tool has better compatibility.

In other embodiments, the insertion section can also be provided with two, three, four or more than six stages; or in other embodiments, only one stage can be arranged on the plug section, so that the same positioning element can only be matched with a joint to be welded with one size, and the welding tool has specificity.

The welding tool further comprises a steel pipe clamping part arranged on the base, and the steel pipe clamping part comprises a fixed rail and a clamping block 10, wherein the fixed rail is fixed on the base and is perpendicular to the installation arm, and the clamping block is located on the fixed rail. In this embodiment, as shown in fig. 7, 8 and 9, the fixing rail includes a mounting plate 11 fixedly connected to the base, and two T-shaped strips are fixedly mounted on the mounting plate 11 by screws, and the T-shaped strips extend perpendicular to the length direction of the mounting arm to form a guide rail 12 on the fixing rail.

In this embodiment, as shown in fig. 1 to 3, 6, 10, 11 and 12, two clamping blocks 10 are provided, and a T-shaped groove 13 matched with the T-shaped strip is provided at the bottom of the clamping block 10, so that both the clamping blocks 10 can slide on the guide rail 12. Two grip blocks 10 are located the installation arm both sides, and arrange about the installation arm symmetry, all be provided with the bottom plate 14 that is located T-slot 13 top on each grip block 10, bottom plate 14 one side is provided with the riser 15 that sets up perpendicular installation arm direction, be provided with on riser 15 near installation arm one side and be used for waiting to weld the clamp plate 16 that steel pipe 32 pressed from both sides tightly, clamp plate 16 is provided with two, and arranges perpendicularly mutually to make four clamp plates 16 on two grip blocks 10 can be used to press from both sides the steel pipe 32 that waits to weld of a plurality of external diameter dimensions. The clamping plates 16 extend along the axial direction of the steel pipe 32 to be welded, so that the steel pipe 32 to be welded is clamped and supported well, the sagging displacement of the steel pipe 32 to be welded under the action of gravity is reduced, and in order to improve the strength of the clamping plates 16, reinforcing plates 17 are further arranged between each clamping plate 16 and the vertical plate 15, so that the clamping plates 16 are prevented from being deformed or broken by the steel pipe 32 to be welded.

In other embodiments, the two clamping blocks can slide on the guide rail in a guiding manner, are positioned on two sides of the mounting arm and are symmetrically arranged relative to the mounting arm, a clamping plate is not arranged on each clamping block, long grooves which are parallel to the axis of the steel pipe to be welded are arranged on opposite side surfaces of the two clamping blocks, and the wall surfaces of the long grooves are two planes which are arranged in an obtuse angle or a right angle, so that a clamping surface for clamping the steel pipe to be welded is formed. In the embodiment, the clamping plate is arranged and supports the structure arranged above the bottom plate, so that the material of the clamping block can be saved, and the cost of the welding tool is reduced.

Or in other embodiments, one clamping block is fixed on the guide rail, and the other clamping block can move on the guide rail in a guiding manner, so that the tool is only suitable for clamping and positioning the steel pipe to be welded with a fixed outer diameter, and the welding tool has specificity.

In this embodiment, the steel tube clamping portion further includes two air cylinders 18, the two air cylinders 18 move synchronously, and each air cylinder 18 is in transmission connection with the corresponding clamping block 10, so as to realize the synchronous movement of the two clamping blocks 10. Specifically, as shown in fig. 6 to 9, symmetrically arranged side plates 19 are disposed on both sides of the mounting plate 11 on the mounting arm, an air cylinder 18 is disposed outside each side plate 19, and correspondingly, a shaft sleeve 21 for interference fit with a piston rod 20 of the air cylinder 18 is disposed at the bottom of each clamping block 10, so as to achieve synchronous movement of the two clamping blocks 10.

In other embodiments, the steel pipe clamping portion may not be provided with an air cylinder, the side plate is provided with a screw rod extending in a direction perpendicular to the side plate, the clamping block is provided with a threaded hole matched with the screw rod, the screw rod is located outside the side plate and provided with a handle, so that the clamping block can be conveniently held by a hand, the handle is operated, the screw rod is rotated, reciprocating guiding movement of the clamping block on the guide rail can be achieved, and the slide block driving mechanism with the structure can be respectively applicable to a structure with one or two clamping blocks movable.

The welding tool further comprises a rotary welding part, as shown in fig. 1 to 3, the rotary welding part comprises a driving motor 22 fixed on the stand 3 and a welding gun clamping arm in transmission connection with the driving motor 22, the rotary welding part further comprises a fixing plate 23 sleeved on the barrel 5 through a bearing, the welding gun clamping arm is fixed on the fixing plate 23 and located beside the mounting arm, and a wire passing hole 24 used for passing a welding wire and a welding gun connecting wire is formed in the fixing plate 23 so as to drive the welding gun clamping arm to rotate around the circumferential direction of the mounting arm in the rotating process of the fixing plate 23. A large gear reduction mechanism and a small gear reduction mechanism are connected between the driving motor 22 and the fixing plate 23 in a transmission mode, the small gear 25 is fixed on an output shaft of the driving motor 22, the large gear 26 is sleeved on the barrel 5 and fixedly connected with the fixing plate 23 to drive the welding gun clamping arm to rotate around the circumferential direction of the mounting arm under the driving action of the driving motor 22, and the rotary welding part arranged in the structure can enable the structure of the whole welding tool to be more compact to reduce the placing space of the tool.

In other embodiments, the fixing plate is not required to be arranged, the welding gun clamping arm is directly fixed on the large gear, the large gear is provided with a wire passing hole, and a bearing is arranged between the large gear and the barrel; or in other embodiments, when the rotating speed of the motor is low, the large and small gear reduction mechanisms can also be omitted.

As shown in fig. 1 to 3 and 13 to 15, the torch holding arm includes a transmission rod 27 welded to the fixing plate 23, and a locker 28 at an end of the transmission rod 27 to fix a position of the torch, the locker 28 for locking the position of the torch and keeping the torch head toward a rotation axis thereof during rotation of the torch holding arm. A T-shaped part 29 is further arranged between the locking piece 28 and the transmission rod 27, a rectangular groove perpendicular to the length direction of the transmission rod 27 is arranged at the end of the transmission rod 27, the T-shaped part 29 is rotatably assembled in the rectangular groove, and the T-shaped part 29 is fixed on the transmission rod 27 through a screw 30. In this embodiment, the locking member 28 includes two locking tabs detachably connected by a hinge on one side and a snap on the other side, and the locking member 28 with this structure is simple and easy to operate. The locking piece 28 is welded on the T-shaped piece 29, so that the angle of the welding gun head is adjusted by adjusting the angle of the T-shaped piece 29 relative to the transmission rod 27, and the requirements of flat welding, overhead welding and overhead welding at the positions of the steel pipe 32 to be welded and the joint 31 to be welded are met.

In other embodiments, the T-shaped part is not arranged, and the locking part is directly welded at the end part of the transmission rod, so that the structural stability of the welding gun clamping arm is improved, and the position change of the welding gun head in the axial direction of the steel pipe to be welded is avoided in the rotating process of the welding clamping arm.

In other embodiments, the locking member may be a closed circular ring structure welded to the T-shaped member, and the outer circumferential surface of the welding gun is sleeved with a rubber sleeve and then is forcibly installed in the circular ring structure to clamp and fix the welding gun.

In the use process of the welding tool for the steel pipe and the joint in the embodiment, the joint 31 to be welded is inserted into the step section 9 with a proper size on the positioning element 8, the length of the joint 31 to be welded is extended out of the barrel 5 through the adjusting screw 6, so that the end part of the joint 31 to be welded corresponds to the position of the welding gun head, the steel pipe 32 to be welded is held by hand, the steel pipe 32 to be welded and the joint 31 to be welded are coaxially arranged, the air cylinder 18 is operated, the two clamping blocks 10 move relatively, the steel pipe 32 to be welded is clamped and fixed between the clamping plates 16, and the driving motor and the welding gun are started, so that the welding and fixing of the butt joint position of the joint 31 to be welded and the steel pipe 32. When the welding angle needs to be changed, the position of the welding gun can be adjusted before the joint 31 to be welded is positioned, and then the positions of the corresponding joint 31 to be welded and the steel pipe 32 to be welded are fixed.

In the embodiment, the motor rotates in a forward rotation mode and then rotates in a reciprocating mode for one circle, so that the power line of the welding gun is not knotted, and the welding box is fixed on the fixing plate and can rotate along with the welding gun.

The welding tool for the steel pipe and the joint can easily realize the coaxiality between the joint to be welded and the steel pipe to be welded, improve the welding quality, and compared with the manual welding mode in the prior art, the welding tool can improve the welding efficiency between the steel pipe and the joint and reduce the labor intensity of workers.

Claims

1. The utility model provides a welding frock of steel pipe and joint which characterized in that includes:

the support comprises a base and a vertical frame fixed on the base;

the joint positioning part is arranged on the stand and comprises a mounting arm which is used for being in plug-in fit with a joint to be welded so as to determine the position of the joint to be welded;

the steel pipe clamping part is arranged on the base and comprises a fixed track perpendicular to the mounting arm and two clamping blocks positioned on the fixed track, at least one clamping block can move along the fixed track in a guiding mode to be matched with the other clamping block to clamp the steel pipe to be welded, and the steel pipe to be welded and the joint to be welded are arranged coaxially;

and the rotary welding part comprises a welding gun clamping arm, the welding gun clamping arm is provided with a driving motor so as to drive the welding gun clamping arm to revolve around the mounting arm, and in the revolving process, the welding gun clamping arm can keep the welding gun head always facing the rotation axis.

2. The steel pipe and joint welding tool according to claim 1, wherein the mounting arm comprises a cylinder fixed on the stand, a screw is assembled in the cylinder, and a joint positioning piece or a joint positioning assembly for matching and inserting with the joint to be welded is arranged at the end of the screw.

3. The steel pipe and joint welding tool according to claim 2, wherein the joint positioning assembly comprises a positioning block fixed at the end of the screw rod, and a positioning element detachably connected with the positioning block, and the positioning element is provided with an insertion section for matching and inserting with the joint to be welded.

4. The tool for welding the steel pipe and the joint according to claim 3, wherein the inserting section is provided with a plurality of stages for matching and inserting the joints to be welded with different inner diameter sizes.

5. The steel pipe and joint welding tool according to any one of claims 1 to 4, wherein the two clamping blocks are guided to move along the fixed track, and the two clamping blocks are symmetrically arranged with respect to the mounting arm.

6. The welding tool for the steel pipe and joint according to claim 5, wherein the steel pipe clamping portion further comprises two cylinders for driving two clamping blocks to move synchronously and respectively in transmission connection with the corresponding clamping blocks.

7. The tool for welding the steel pipe and the joint according to any one of claims 1 to 4, wherein the clamping blocks comprise a bottom plate and two clamping plates fixed on the bottom plate, and the two clamping plates on each clamping block extend along the axial direction of the steel pipe to be welded.

8. The tool for welding the steel pipe and the joint according to any one of claims 1 to 4, wherein the rotary welding part comprises a fixing plate rotatably assembled on the mounting arm, the welding gun clamping arm is fixed on the fixing plate, and a wire passing hole for passing a welding wire and a welding gun connecting wire is formed in the fixing plate.

9. The tool for welding the steel pipe and the joint according to claim 8, wherein the welding gun clamping arm comprises a transmission rod arranged on a fixed plate, and a locking piece positioned at the end of the transmission rod for fixing the position of the welding gun, and the locking piece comprises two locking sheets connected through a buckle.

10. The steel pipe and joint welding tool according to claim 9, wherein a T-shaped part is arranged between the transmission rod and the locking part, the T-shaped part is rotatably assembled at the end of the transmission part and fixed on the transmission rod through a screw, and the locking part is fixed on the T-shaped part.