CN-121989109-A - Polishing device and polishing method for spiral welded pipe machining

CN121989109ACN 121989109 ACN121989109 ACN 121989109ACN-121989109-A

Abstract

The invention belongs to the technical field of spiral welded pipe polishing, and particularly discloses a polishing device and a polishing method for spiral welded pipe processing. The invention realizes the rapid clamping of spiral welded pipes with different pipe diameters and the accurate alignment of the space postures of the grinding wheels through the integrated self-adaptive adjusting mechanism and the multidimensional adjusting component, and particularly utilizes the flexible avoidance mechanism supported by the springs to lead the guide wheels and the grinding wheels to float synchronously when encountering high welding seams, thereby effectively avoiding the clamping damage of equipment and the bending of the grinding wheel shafts, remarkably reducing the heat influence caused by severe friction, preventing the metallographic structure change of the welding seams and parent metals, ensuring the corrosion resistance of the welded pipes, and realizing the automation and high-quality grinding of all welding seams by matching with the automatic seam searching of the guide wheels.

Inventors

LI XIAODAN
LI XIAOXIA
YANG XIN
YANG HEPING

Assignees

山西万流金属制品有限公司
山西鑫日升新材料科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (10)

1. The polishing device for the spiral welded pipe machining is characterized by comprising a frame (1), a pipe end clamping mechanism (2) and a shape-following self-adaptive polishing unit (3), wherein the pipe end clamping mechanism (2) is arranged on the frame (1), the shape-following self-adaptive polishing unit (3) comprises a hydraulic rod (4), an elastic reset connecting piece (5), a spiral track guiding mechanism (6) and an adjustable polishing head assembly (7), the hydraulic rod (4) is arranged on the frame (1), one end of the elastic reset connecting piece (5) is connected with the movable end of the hydraulic rod (4), the spiral track guiding mechanism (6) is connected with the other end of the elastic reset connecting piece (5), and the adjustable polishing head assembly (7) is arranged on the spiral track guiding mechanism (6).
2. The grinding device for machining the spiral welded pipe according to claim 1, wherein the spiral track guiding mechanism (6) comprises a supporting top frame plate (8), a guide wheel (9) and a fixing plate (10), the supporting top frame plate (8) is connected with the elastic reset connecting piece (5), the fixing plate (10) is arranged on the bottom wall of the supporting top frame plate (8), the guide wheel (9) is rotatably arranged on the fixing plate (10), and a groove (11) is formed in the middle circumferential wall of the guide wheel (9).
3. The spiral welded pipe machining coping device according to claim 2, wherein the adjustable grinding head assembly (7) comprises a clamping moving block (12), a vertical adjusting piece (13), a transverse adjusting screw (14), a multidirectional moving adjusting piece (15) and a grinding head assembly (16), an adjusting frame (17) is arranged on the supporting top frame (8), clamping sliding grooves (18) are formed in two opposite inner side walls of the adjusting frame (17), the clamping moving block (12) is clamped and slidingly arranged in the clamping sliding grooves (18), the vertical adjusting piece (13) is connected with the clamping moving block (12), the transverse adjusting screw (14) penetrates through the supporting top frame (8) to be connected with the clamping moving block (12), the transverse adjusting screw (14) is in threaded connection with the supporting top frame (8), the multidirectional moving adjusting piece (15) is arranged below the clamping moving block (12), the multidirectional moving adjusting piece (15) is connected with the vertical adjusting piece (13), and the transverse adjusting screw (14) is connected with the multidirectional adjusting piece (15).
4. The grinding device for machining the spiral welded pipe according to claim 3, wherein the vertical adjusting piece (13) comprises a vertical adjusting screw rod (19) and a limiting slide rod (20), the vertical adjusting screw rod (19) penetrates through the clamping moving block (12) to be connected with the multidirectional moving adjusting piece (15), the vertical adjusting screw rod (19) is in threaded connection with the clamping moving block (12), the limiting slide rod (20) penetrates through the clamping moving block (12) to be connected with the multidirectional moving adjusting piece (15), and the limiting slide rod (20) is connected with the clamping moving block (12) in a sliding mode.
5. The grinding device for machining the spiral welded pipe is characterized in that the multidirectional moving adjusting piece (15) comprises a moving groove plate frame (21), a clamping moving adjusting block (22), an adjusting screw (23) and a universal adjusting locking piece (24), the moving groove plate frame (21) is arranged on a limiting sliding rod (20) and a vertical adjusting screw (19), a moving clamping groove (25) is formed in the moving groove plate frame (21), the clamping moving adjusting block (22) is arranged in the moving clamping groove (25) in a clamping sliding mode, the adjusting screw (23) is arranged in the moving clamping groove (25) in a rotating mode, the clamping moving adjusting block (22) is connected to the adjusting screw (23) in a sleeved mode, the clamping moving adjusting block (22) is connected with the adjusting screw (23) in a threaded mode, the universal adjusting locking piece (24) is arranged on the clamping moving adjusting block (22), and the grinding head assembly (16) is arranged in the universal adjusting locking piece (24).
6. The grinding device for machining the spiral welded pipe according to claim 5, wherein the universal adjusting locking piece (24) comprises a universal rotating shell (26) and a locking bolt (27), the universal rotating shell (26) is arranged on the clamping moving adjusting block (22), the locking bolt (27) is arranged on the circumferential side wall of the universal rotating shell (26) in a penetrating mode, and the locking bolt (27) is in threaded connection with the universal rotating shell (26).
7. The grinding device for machining the spiral welded pipe according to claim 6, wherein the grinding head assembly (16) comprises a universal rotating ball (28), a grinding frame (29), a grinding wheel (30) and a grinding motor (31), the universal rotating ball (28) is clamped and rotated in the universal rotating shell (26), the grinding frame (29) is arranged on the universal rotating ball (28), the grinding wheel (30) is rotated on the grinding frame (29), the grinding motor (31) is arranged on the grinding frame (29), and the output end of the grinding motor (31) is connected with the grinding wheel (30).
8. The grinding device for machining the spiral welded pipe according to claim 7, wherein the elastic reset connecting piece (5) comprises an upper fixed disc (32), a lower fixed disc (33) and a clamping rotary elastic connecting piece (34), the upper fixed disc (32) is connected with the movable end of the hydraulic rod (4), the lower fixed disc (33) is arranged on the supporting top frame plate (8), the clamping rotary elastic connecting piece (34) is arranged between the upper fixed disc (32) and the lower fixed disc (33), the clamping rotary elastic connecting piece (34) comprises a fixed telescopic rod (35), a spring (36), a limiting plate (37) and a clamping column plate (38), the fixed end of the fixed telescopic rod (35) is arranged on the lower fixed disc (35), the limiting plate (37) is connected with the movable end of the fixed telescopic rod (35), the spring (36) is arranged on the outer side of the fixed telescopic rod (35), the spring (36) is arranged between the lower fixed disc (32) and the limiting plate (33), and the clamping rotary column (38) is sleeved on the upper fixed disc (32) and is provided with a clamping ring groove (39).
9. The grinding device for spiral welded pipe machining according to claim 8, wherein the pipe end clamping mechanism (2) comprises a fixed ring (40) and a radial fixed supporting piece (41), the fixed ring (40) is arranged on the frame (1), a fixed hole (42) is formed in the circumferential side wall of the fixed ring (40), the radial fixed supporting piece (41) is arranged in the fixed hole (42), the radial fixed supporting piece (41) comprises a fixed adjusting screw (43), a micro-motion telescopic rod (44), a micro-motion spring (45), a fixed wrapping shell (46) and a supporting roller (47), the fixed adjusting screw (43) is rotationally arranged in the fixed hole (42), the fixed adjusting screw (43) is in threaded connection with the fixed hole (42), the fixed end of the micro-motion telescopic rod (44) is arranged on the fixed adjusting screw (43), the fixed wrapping shell (46) is arranged at the movable end of the micro-motion telescopic rod (44), the micro-motion spring (45) is sleeved on the outer side of the micro-motion telescopic rod (44), the micro-motion spring (45) is arranged between the fixed adjusting screw (43) and the fixed wrapping shell (46), and the fixed wrapping shell (46) is rotationally wrapped.
10. A method of dressing a dressing apparatus for spiral welded pipe processing according to any one of claims 1 to 9, comprising the steps of: Step one, according to the pipe diameter of a spiral welded pipe to be processed, adjusting the clamping diameter of a pipe end clamping mechanism (2) to clamp the spiral welded pipe; step two, adjusting the position of the conformal self-adaptive polishing unit (3) to enable the conformal self-adaptive polishing unit (3) to be positioned at the initial position of the welding line of the spiral welded pipe; the external driving pushes the spiral welding pipe to rotate around the axis of the spiral welding pipe and feed along the axial direction, and under the guiding action of the spiral welding line, the guide wheel (9) of the conformal self-adaptive polishing unit (3) rolls along the spiral welding line, so that the polishing wheel (30) is always aligned to the welding line position; And fourthly, realizing flexible avoidance under the action of the elastic reset connecting piece (5), enabling the guide wheel (9) and the grinding wheel (30) to float synchronously when encountering high welding seams, enabling the grinding wheel (30) to be attached to the surface of the welding seams at constant pressure, and finishing grinding of the whole welding seams along with the rotation feeding of the spiral welding pipe.

Description

Polishing device and polishing method for spiral welded pipe machining Technical Field The invention belongs to the technical field of spiral welded pipe grinding, and particularly relates to a grinding device and a grinding method for spiral welded pipe machining. Background The spiral welded pipe has the advantages of high strength, low production cost, strong adaptability and the like, and is widely applied to the fields of petroleum, natural gas, urban pipe network construction, pile foundation engineering and the like. In the production of spiral welded pipes, the surface quality of the weld is one of the key factors determining the overall performance thereof. After welding, the surface of the welding seam often has the defects of overhigh residual height, weld flash, splashing and the like, so that the appearance of the pipeline is affected, uneven coating can be caused in subsequent anti-corrosion treatment, and even the coating becomes a stress concentration point in the use process, and the fatigue resistance and corrosion resistance of the pipeline are reduced. Therefore, the weld of the spiral welded pipe must be subjected to a coping process. Currently, the polishing operation for the weld joint of the spiral welded pipe mainly depends on manual hand-held polishing tools to operate or semi-automatic polishing equipment is adopted. However, the prior art suffers from the following disadvantages: 1. The adaptability is poor, the pipe diameter specification of the spiral welded pipe is numerous, when the existing coping equipment clamps and guides welded pipes with different pipe diameters, the adjustment process is complicated, even the adaptation cannot be realized, and the equipment utilization rate is low. 2. The adjustment precision is low, the position and the form of the welding line on the spiral welded pipe have certain deviation, the existing grinding wheel adjusting mechanism is mostly fixed or single in adjustment dimension, the fine adjustment of the height, the transverse position and the angle of the grinding wheel is difficult to realize, the grinding wheel cannot be ensured to be aligned with the welding line all the time, and the problem that the base material is not polished in place or excessively polished easily occurs. 3. The lack of a follow-up avoidance mechanism is that when the local excess height of a welding line is overlarge or hard particles exist, the equipment is usually in rigid connection, the guide wheel cannot effectively avoid, the clamping of the guide wheel and the damage to the surface of a welded pipe are easily caused, or the bending deformation of a grinding wheel shaft is caused by severe impact, so that the precision and the service life of the equipment are affected. 4. The problem of heat influence is that severe friction heat is generated in the polishing process, if the heat cannot be effectively controlled, local annealing or secondary quenching is easily caused on a welding line and a parent metal (a heat affected zone) nearby the welding line, and metallographic structure change is caused, so that the original mechanical property of the material is reduced, the corrosion resistance of a welded pipe is seriously weakened, and hidden danger is caused for long-term safe operation of a pipeline. Therefore, a spiral welded pipe polishing device and a polishing method which can be adaptive to different pipe diameters, accurately adjust in multiple dimensions, have a flexible follow-up avoidance function, guarantee polishing quality and reduce heat influence damage are needed. Disclosure of Invention Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the polishing device and the polishing method for processing the spiral welded pipe, which realize the rapid clamping of spiral welded pipes with different pipe diameters and the accurate alignment of the space postures of the polishing wheels through the integrated self-adaptive adjusting mechanism and the multidimensional adjusting component, and particularly utilize the flexible avoidance mechanism supported by the springs to lead the guide wheels and the polishing wheels to float synchronously when encountering high welding seams, thereby effectively avoiding the clamping damage of equipment and the bending of the polishing wheel shafts, remarkably reducing the heat influence caused by severe friction, preventing the metallographic structure change of welding seams and parent metals, ensuring the corrosion resistance of the welded pipes, and realizing the automatic and high-quality polishing of the full welding seams by matching with the automatic seam searching of the guide wheels. The invention provides a coping device for spiral welded pipe machining, which comprises a frame, a pipe end clamping mechanism and a shape following self-adaptive grinding unit, wherein the pipe end clamping mechanism is arranged on the frame, the shape following self-adaptive