CN-121988843-A - Fixed-axis rotary automatic welding device

CN121988843ACN 121988843 ACN121988843 ACN 121988843ACN-121988843-A

Abstract

The invention discloses a fixed-axis rotation automatic welding device which comprises a supporting and positioning frame, an installation seat, a welding head assembly, a rotation driving mechanism and an AVC lifting driving mechanism, wherein the supporting and positioning frame is used for enabling the whole device to be firmly supported inside a pipeline to be welded, a vertical axis is vertically arranged in the supporting and positioning frame, the installation seat is sleeved on the vertical axis, the AVC lifting driving mechanism is arranged on the installation seat and is in transmission connection with the welding head assembly to drive the welding head assembly to do lifting motion, and the rotation driving mechanism is in transmission connection with the installation seat and is used for driving the installation seat to rotate around the axis of the vertical axis so as to synchronously drive the AVC lifting driving mechanism and the welding head assembly to rotate around the vertical axis in the lifting motion process of the welding head assembly. The invention has the advantages of compact structure, automatic joint welding from the inside of the pipeline, high welding efficiency, stable welding quality and good consistency.

Inventors

ZHAO FENGDONG
LI QING
Zhen Jiaxin

Assignees

吴钩科技(苏州)有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (11)

1. The fixed-axis rotary automatic welding device is characterized by comprising a supporting and positioning frame, an installation seat, a welding head assembly, a rotary driving mechanism and an AVC lifting driving mechanism, The support positioning frame is used for enabling the whole device to be firmly supported inside a pipeline to be welded, and a vertical shaft is vertically arranged in the support positioning frame; The AVC lifting driving mechanism is arranged on the mounting seat and is in transmission connection with the welding head assembly to drive the welding head assembly to do lifting movement; The rotary driving mechanism is in transmission connection with the mounting seat and is used for driving the mounting seat to rotate around the axis of the vertical shaft so as to synchronously drive the AVC lifting driving mechanism and the welding head assembly to rotate around the vertical shaft in the lifting movement process of the welding head assembly.
2. The automatic welding device for fixed shaft rotation of claim 1, wherein the mounting seat is movably sleeved on the vertical shaft in a freely rotatable manner around the vertical shaft through a pair of bearings, an upper positioning shaft hoop and a lower positioning shaft hoop are fixedly sleeved on the vertical shaft, and the upper positioning shaft hoop and the lower positioning shaft hoop are distributed on the upper side and the lower side of the mounting seat so as to limit the axial position of the mounting seat on the vertical shaft.
3. The fixed shaft rotary automatic welding device according to claim 2, wherein the rotary driving mechanism comprises a fixed gear fixedly sleeved on a vertical shaft, a rotary motor vertically fixed on an installation seat, and a movable gear fixedly sleeved on an output shaft of the rotary motor and meshed with the fixed gear, and the rotary motor drives the movable gear to walk along the fixed gear so as to drive the installation seat to rotate around the vertical shaft, and further synchronously drives the AVC lifting driving mechanism and the welding head assembly to synchronously rotate around the vertical shaft.
4. The automatic welding device for fixed shaft rotation according to claim 3, wherein the upper portion of the vertical shaft is provided with an external thread section, a through hole is formed in a supporting beam of the supporting and positioning frame, the vertical shaft penetrates through the through hole, the fixed gear, the upper positioning shaft hoop, the mounting seat and the lower positioning shaft hoop are sequentially sleeved on the vertical shaft portion below the supporting beam from top to bottom, a locking nut is connected to the external thread section of the vertical shaft in a threaded manner, the locking nut is located above the supporting beam, and when the locking nut is screwed downwards, the vertical shaft can be driven to move upwards to drive the positioning wheel, the upper positioning shaft hoop, the mounting seat and the lower positioning shaft hoop to move upwards synchronously until the positioning wheel is fastened to the supporting beam in a pressing manner.
5. The fixed axis rotary automatic welding device according to claim 3, wherein the rotary driving mechanism further comprises a circular grating encoder, the circular grating encoder comprises a grating disc and an encoder reading head, the grating disc is coaxially fixed on an output shaft of the rotary motor, the encoder reading head is fixed on a shell of the rotary motor and corresponds to the grating disc, the encoder reading head is in signal connection with a control system for controlling the action of the rotary motor, and the circular grating encoder is matched with the grating disc through the encoder reading head so as to accurately measure the rotation angle of the mounting seat and the welding head assembly around a vertical axis and feed back rotation angle data to the control system in real time.
6. The fixed axis rotary automatic welding device according to claim 5, wherein a cover is arranged on the mounting base and covers the rotary motor and the circular grating encoder.
7. The fixed-axis rotating automatic welding device according to claim 1, wherein the AVC lifting driving mechanism comprises a linear screw rod stepping motor vertically fixed on the mounting seat, a sliding block is connected to a screw rod of the linear screw rod stepping motor in a threaded manner, the welding head assembly is connected to the sliding block, and the linear screw rod stepping motor drives the screw rod to rotate so as to drive the sliding block to lift and synchronously drive the welding head assembly to lift.
8. The fixed-axis rotating automatic welding device according to claim 7, wherein the welding head assembly and the sliding block are fixedly connected with a first connecting plate, a plurality of horizontal waist holes extending in the horizontal direction are formed in the first connecting plate, a second connecting plate is fixedly connected with the welding head assembly, a plurality of threaded holes corresponding to the horizontal waist holes are formed in the second connecting plate, an adjusting bolt is arranged in each corresponding horizontal waist hole and each threaded hole in a penetrating mode, a screw portion of each adjusting bolt sequentially penetrates through the corresponding horizontal waist hole and then is connected with the corresponding threaded hole in a threaded mode, the first connecting plate and the second connecting plate are detachably fixed together through the adjusting bolts, when the adjusting bolts are unscrewed, the second connecting plate can move along the horizontal waist holes together through the adjusting bolts connected with the first connecting plate at the moment, so that the welding head assembly can be synchronously driven to move, the first connecting plate can be pressed and fixed to the second connecting plate through the heads of the adjusting bolts when the adjusting bolts are screwed, and therefore the transverse position of the welding head assembly can be fixed.
9. The device for automatically welding fixed shaft rotation of claim 8, wherein the first connecting plate is detachably and fixedly connected to the sliding block through a plurality of first fixing bolts, and the welding head assembly is detachably and fixedly connected with the second connecting plate through a plurality of second fixing bolts.
10. The fixed-axis rotating automatic welding device according to any one of claims 1 to 9, wherein the supporting and positioning frame comprises a main supporting vertical plate, a left supporting vertical plate, a right supporting vertical plate and supporting beams, the left supporting vertical plate and the right supporting vertical plate are respectively fixed on the left side and the right side of the main supporting vertical plate, the supporting beams are horizontally arranged on the upper portion of the main supporting vertical plate, the left end and the right end of the supporting beams are respectively connected with the left supporting vertical plate and the right supporting vertical plate, and the bottom surface profile of the main supporting vertical plate is arc-shaped matched with the inner wall of a pipeline to be welded.
11. The device for automatically welding fixed shaft rotation of claim 10, wherein the mounting base, the welding head assembly, the rotation driving mechanism and the AVC lifting driving mechanism are uniformly distributed in a mounting space surrounded by the main supporting vertical plate, the left supporting vertical plate, the right supporting vertical plate and the supporting cross beam.

Description

Fixed-axis rotary automatic welding device Technical Field The invention relates to the technical field of automatic welding, in particular to a fixed-axis rotary automatic welding device for finishing joint welding of a large-caliber pipeline. Background In the installation engineering of nuclear power, petrochemical industry, chemical fiber and other industries, the pipeline system is large in scale, welding is used as a key working procedure in the construction, and the quality and the efficiency of the pipeline system are directly related to the overall quality, the safety and the progress of the engineering. In the preparation of large-caliber pipelines in the industry, a joint vertically communicated with the pipeline is often required to be welded on the outer wall of the pipeline, and the connection relation between the pipeline and the joint is shown in fig. 1 and 2. Conventionally, the welding of the pipe 100 and the joint 200 mainly relies on a welder to perform manual operation on the outside of the pipe, and the welding method has the problems that firstly, the manual welding generally has the problems of high labor intensity and low welding efficiency of the welder, and the welding quality depends on personal skills and experiences of the welder, so that the quality of a welding seam is unstable, the consistency of the quality of the product is affected, and secondly, the annular welding seam 300 formed by welding the pipe 100 and the joint 200 is positioned on the outside of the pipe, and the appearance of the welding seam depends on the skills of the worker, so that the consistency of the appearance of the welding seam is easily caused, and the appearance of the product is affected. Disclosure of Invention The invention aims to provide a fixed-axis rotary automatic welding device which can automatically weld joints from the inside of a pipeline, and has the advantages of high welding efficiency, stable welding quality and good consistency. In order to achieve the aim, the invention adopts the following technical scheme that the fixed-axis rotary automatic welding device comprises a supporting and positioning frame, an installation seat, a welding head assembly, a rotary driving mechanism and an AVC lifting driving mechanism, The support positioning frame is used for enabling the whole device to be firmly supported inside a pipeline to be welded, and a vertical shaft is vertically fixed in the support positioning frame; the rotary driving mechanism is in transmission connection with the mounting seat and is used for driving the mounting seat to rotate around the axis of the vertical shaft; The AVC lifting driving mechanism is arranged on the mounting seat and is in transmission connection with the welding head assembly to drive the welding head assembly to lift; The rotary driving mechanism can drive the mounting seat to rotate around the vertical shaft so as to synchronously drive the AVC lifting driving mechanism and the welding head assembly to synchronously rotate around the vertical shaft, and in the process that the welding head assembly rotates around the vertical shaft, the AVC lifting driving mechanism can drive the welding head assembly to do lifting motion. Further, the fixed shaft rotating automatic welding device comprises the mounting seat, wherein the mounting seat is movably sleeved on the vertical shaft in a free rotation mode around the vertical shaft through a pair of bearings, an upper positioning shaft hoop and a lower positioning shaft hoop are fixedly sleeved on the vertical shaft, and the upper positioning shaft hoop and the lower positioning shaft hoop are distributed on the upper side and the lower side of the mounting seat so as to limit the axial position of the mounting seat on the vertical shaft. Further, the fixed shaft rotating automatic welding device comprises a fixed gear fixedly sleeved on a vertical shaft, a rotating motor vertically fixed on an installation seat, and a movable gear fixedly sleeved on an output shaft of the rotating motor and meshed with the fixed gear, wherein the rotating motor drives the movable gear to walk along the fixed gear so as to drive the installation seat to rotate around the vertical shaft, and further synchronously drive the AVC lifting driving mechanism and the welding head assembly to synchronously rotate around the vertical shaft. Further, the automatic welding device for fixed shaft rotation is characterized in that an external thread section is arranged on the upper portion of the vertical shaft, a through hole is formed in a supporting beam of a supporting and positioning frame, the vertical shaft penetrates through the through hole, the fixed gear, the upper positioning shaft hoop, the mounting seat and the lower positioning shaft hoop are sequentially sleeved on the vertical shaft portion below the supporting beam from top to bottom, a locking nut is connected to the external thread section of the vertical shaft in a