CN-121988939-A - Metal pipe welding device and welding method

CN121988939ACN 121988939 ACN121988939 ACN 121988939ACN-121988939-A

Abstract

The invention relates to the technical field of metal pipe fitting welding, in particular to a metal pipe welding device and a welding method. The roller fixer comprises an outer frame, an inner frame and a second side end bracket, wherein the inner frame is positioned in the outer frame in pairs, and the second side end bracket is positioned in the outer frame in pairs. According to the invention, the clamping rotation and the welding head feeding are synchronously controlled by a set of driving motor, so that the full-flow automation of clamping, centering, rotation and welding is realized, the production efficiency is greatly improved, the instability of manual operation is eliminated, the uniform rotation of the metal capillary tube ensures the uniform penetration of girth welding, the consistent weld formation and the remarkable improvement of the quality of the welding joint.

Inventors

ZHOU JIANMING
SONG WENWU
XU ZHENGBEN
FENG LIANG
WU HAIWANG
GAO QIANG
SHU ZHENHUA
Xing Xingliang
CHEN JIANLIN

Assignees

苏州木渎特钢科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260227

Claims (9)

1. The welding device for the metal tube is characterized by comprising a fixing component (1) for fixing the metal capillary tube and a welding component (2) for performing end face girth welding on the metal capillary tube; The fixing component (1) comprises a fixing base (11), a motor (12) and a metal pipe control piece (13) which are arranged on the fixing base (11), wherein the metal pipe control piece (13) comprises a rear row control frame (131) and a roller fixer which is connected with the fixing base (11) in an up-down sliding manner; The bottom end of the back row control frame (131) is fixedly connected with the upper surface of the fixed base (11), is in up-down sliding fit with the inner wall of the back row control frame (131), a control shaft (1311) is arranged in the middle of the back row control frame (131), the bottom end of the control shaft (1311) penetrates through the back row control frame (131) to be in transmission connection with a motor (12), the top end of the control shaft (1311) is in threaded fit with the welding assembly (2), and the motor (12) controls the welding assembly (2) to lift along the back row control frame (131) through the control shaft (1311); The roller fixer comprises an outer frame (132), an inner frame (133) and a second side end bracket (135) which are positioned in the outer frame (132) in pairs, wherein the left end and the right end of the outer frame (132) are matched with the fixed base (11) in a sliding way up and down, and the rear end of the outer frame (132) is matched with the control shaft (1311) in a threaded way; The side wall of the inner frame (133) is in horizontal sliding fit with the inner wall of the outer frame (132), and one end of the inner frame (133) penetrates through the outer frame (132) to be in sliding fit with the side wall of the rear control frame (131); The bottom end of the second side end support (135) is fixedly matched with the fixed base (11), a driving shaft (1352) for driving the metal capillary tube to rotate is connected to the middle of the second side end support (135), the driving shaft (1352) is in transmission connection with the control shaft (1311) through a transmission assembly, two auxiliary shafts (1354) are horizontally and slidably connected to the top of the second side end support (135), two ends of each auxiliary shaft (1354) penetrate through the inner frame (133) and are slidably connected with the inner wall of the outer frame (132), and the auxiliary shafts (1354) are used for driving the metal capillary tube to conduct center alignment.
2. The welding device for metal pipes according to claim 1, wherein the left and right ends of the upper surface of the fixed base (11) are fixedly connected with first side end brackets (111), the bottom of the first side end brackets (111) is provided with a fixed opening (1111), the left and right ends of the outer frame (132) are in sliding fit with the first side end brackets (111) up and down, and the bottom of the second side end brackets (135) is in plugging fit with the fixed opening (1111); Frame mouth (1321) has been seted up to outer frame (132) front and back wall, frame (133) are the U template entirely, two inner frame (133) are in outer frame (132) are located, inner frame (133) are protruding through outer wall face and frame mouth (1321) horizontal sliding fit, inner frame (133) are passed at second side support (135) both ends, first gag lever post (1331) are fixedly connected with in inner frame (133) rear end, first spacing groove (1313) that run through have been seted up to back row control frame (131) front and back wall, first spacing groove (1313) are used for guiding inner frame (133) to slide along frame mouth (1321), first gag lever post (1331) and first spacing groove (1313) sliding fit.
3. The welding device for metal tubes according to claim 2, wherein an inner wall surface of the inner frame (133) is in clamping fit with an inner cushion block (1332), and the inner cushion block (1332) is used for contacting with a non-welding end of the metal capillary tube.
4. The metal tube welding device as set forth in claim 2, wherein the top end of the second side end bracket (135) is horizontally and slidably connected with two sliding blocks (1353) through a guide rail pair, second limit grooves (1322) are correspondingly formed in two end wall surfaces in the outer frame (132), the second limit grooves (1322) are used for guiding the auxiliary shaft (1354) to be close to the metal capillary, two ends of the auxiliary shaft (1354) penetrate through the sliding blocks (1353) and are located in the second limit grooves (1322), and two ends of the auxiliary shaft (1354) are in sliding fit with the second limit grooves (1322).
5. The metal tube welding apparatus according to claim 4, wherein the roller holder further comprises an elastic connecting member (134) having one end screwed to the control shaft (1311), an extension plate is fixedly connected to one side of the middle portion of the outer frame (132) near the elastic connecting member (134), the extension plate is slidably fitted up and down to an inner wall of the other end of the elastic connecting member (134), and the inner wall of the elastic connecting member (134) is elastically connected to the extension plate.
6. The welding device for metal pipes according to claim 2, wherein the welding assembly (2) comprises a first lifting plate (21) and a welding machine (23) for welding, the left end and the right end of the first lifting plate (21) are in sliding fit with the inner wall of the rear control frame (131), the top end of the control shaft (1311) penetrates through the first lifting plate (21) to be in threaded connection with the first lifting plate (21), and the front end of the first lifting plate (21) is connected with the welding machine (23) through a second lifting plate (22).
7. The welding device for metal pipes according to claim 2, wherein the transmission assembly comprises a first transmission shaft (1314) and a second transmission shaft (1351), the first transmission shaft (1314) is rotatably connected with the rear control frame (131), and one end of the first transmission shaft (1314) is meshed with the control shaft (1311); Two ends of a second transmission shaft (1351) are respectively connected with the second side end support (135) in a rotating mode, the first transmission shaft (1314) is in transmission connection with the second transmission shaft (1351) through a first belt, and the second transmission shaft (1351) is in transmission connection with the driving shaft (1352) through a second belt.
8. The welding device for metal pipes according to claim 6, wherein the second lifting plate (22) is in sliding fit with the surface of the first lifting plate (21) up and down, and a limiting plate (1312) is fixedly connected to the inner wall of the rear control frame (131), and the limiting plate (1312) is used for limiting the height of the welding machine (23).
9. A method of welding a metal tube welding apparatus according to any one of claims 1 to 8, comprising the steps of: step S1, beveling and cleaning the butt end surfaces of two metal capillaries to be welded to remove greasy dirt and an oxidation layer; subsequently, two metal tubes are respectively placed in one inner frame (133) to be held by the driving shaft (1352); The motor (12) drives the control shaft (1311) to rotate, so that the first limiting rod (1331) slides along the first limiting groove (1313) to drive the two inner frames (133) to move along the frame opening (1321) in opposite directions until the two inner frames (133) are in contact with each other; Step S2, two auxiliary shafts (1354) are driven by a second limit groove (1322) to horizontally move along the guide rail pair in opposite directions, and the two auxiliary shafts (1354) contact and push the metal capillary tubes so that the two metal capillary tubes realize center alignment; step S3, the rotation of the control shaft (1311) synchronously drives the first lifting plate (21) to move downwards along the rear control frame (131) so that the bottom end of the welder (23) is close to the welding end of the metal capillary; When the control shaft (1311) rotates, the metal capillary is driven to rotate at a constant speed through the driving shaft (1352), and the welding machine (23) performs girth welding on the end face of the metal capillary; And S4, after the welding of the metal capillary is finished, the motor (12) reversely drives the first lifting plate (21) to reset so that the welding machine (23) is far away from the metal capillary, and meanwhile, the outer frame (132) moves downwards to reset so that the two auxiliary shafts (1354) are not contacted with the metal capillary any more, and the metal capillary after the welding treatment can be taken out.

Description

Metal pipe welding device and welding method Technical Field The invention relates to the technical field of metal pipe fitting welding, in particular to a metal pipe welding device and a welding method. Background A metal capillary is a very small diameter metal tube, typically between 0.1mm and 10 mm in diameter, sometimes as thin as hair. The core function of the metal capillary tube is to utilize ‌ throttling and depressurization effects ‌ and ‌ flow regulating capacity ‌ generated by the small inner diameter of the metal capillary tube to realize key functions in a fluid transmission system. In the practical application of metal capillaries, it is often necessary to connect with other pipes or components by soldering. However, the conventional welding method generally depends on manual operation, and has the problems of low efficiency, unstable welding quality, high labor intensity and the like. In the prior art, although a part of automatic welding equipment exists, the problems of pipe clamping, rotation synchronism and weld quality still exist. For example, when welding a metal capillary, the local uneven heating is easy to cause the pipe to generate temperature stress, and if the temperature stress cannot be effectively controlled, the workpiece can be deformed or even cracked after welding, and the welding quality and the structural strength are affected. In addition, the technical scheme focuses on completing welding by clamping and moving the welding gun, but is weak in realizing integrated control of uniform rotation of a workpiece and accurate synchronous descending of the welding gun, and can cause the problems of uneven welding seams, inconsistent penetration and the like. In order to ensure the stability of the circumferential seam welding of the end face of the metal capillary tube, a welding device and a welding method capable of realizing the precise centering of the microtube and the automation cooperation of the welding process are needed. Disclosure of Invention The invention aims to realize accurate centering, uniform rotation and synchronous operation of a welding head of a metal capillary, thereby improving welding efficiency, ensuring uniformity and quality stability of girth welding, and reducing thermal stress and deformation problems caused by inconsistent operation. In order to achieve the above object, one of the objects of the present invention is to provide a metal tube welding device, comprising a fixing assembly for fixing a metal capillary tube and a welding assembly for performing end face girth welding on the metal capillary tube; The fixed component comprises a fixed base, a motor and a metal pipe control piece, wherein the motor and the metal pipe control piece are positioned on the fixed base, and the metal pipe control piece comprises a rear control frame and a roller fixer which is connected with the fixed base in an up-down sliding manner; The bottom end of the back row control frame is fixedly connected with the upper surface of the fixed base, is matched with the inner wall of the back row control frame in a vertically sliding way, a control shaft is arranged in the middle of the back row control frame, the bottom end of the control shaft penetrates through the back row control frame to be in transmission connection with a motor, the top end of the control shaft is matched with a welding assembly in a threaded way, and the motor controls the welding assembly to lift along the back row control frame through the control shaft; The roller fixer comprises an outer frame, an inner frame and a second side end bracket, wherein the inner frame and the second side end bracket are arranged in the outer frame in pairs, the left end and the right end of the outer frame are matched with the fixed base in a sliding way up and down, and the rear end of the outer frame is matched with the control shaft in a threaded way; Inner frame side wall and outer frame the inner wall is horizontally matched in a sliding way, one end of the inner frame penetrates through the outer frame and is in sliding fit with the side wall of the rear control frame; The bottom end of the second side end support is fixedly matched with the fixed base, a driving shaft for driving the metal capillary to rotate is connected to the middle of the second side end support, the driving shaft is in transmission connection with the control shaft through a transmission assembly, the top of the second side end support is horizontally and slidably connected with two auxiliary shafts, two ends of each auxiliary shaft penetrate through the inner frame and are slidably connected with the inner wall of the outer frame, and the auxiliary shafts are used for driving the metal capillary to conduct center alignment. As a further improvement of the technical scheme, the left end and the right end of the upper surface of the fixed base are fixedly connected with first side end brackets, the bottom of each first side end brac