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CN-121988954-A - Bent pipe flange welding tool and automatic calibration method

CN121988954ACN 121988954 ACN121988954 ACN 121988954ACN-121988954-A

Abstract

The application discloses a bent pipe flange welding tool and an automatic calibration method, and belongs to the technical field of equipment for welding bent pipe flanges. The bent pipe flange welding tool comprises a base, a bent pipe fixing assembly, a laser calibration assembly, a three-jaw chuck and an adjusting assembly, wherein the bent pipe fixing assembly is fixedly arranged on one side of the base, the laser calibration assembly comprises a first laser emitter and a first target, a self-centering clamp, an emission axis of the first laser emitter is coaxially arranged with the self-centering clamp, the first target is detachably arranged at the axis position of the three-jaw chuck, and the adjusting assembly is connected with and drives the three-jaw chuck. According to the technical scheme, the self-centering clamp, the laser calibration assembly and the adjusting assembly are arranged, so that dependence on professional skills and long-term experience of operators is greatly reduced, high-precision centering operation can be rapidly and reliably completed by workers after basic training, and consistency and general reliability of welding quality are fundamentally ensured.

Inventors

  • WANG JINGWEN
  • WANG ENYANG
  • WANG BAOHUA
  • WANG XINJU

Assignees

  • 济南鑫泰锻造有限公司

Dates

Publication Date
20260508
Application Date
20260324

Claims (10)

  1. 1. The bent pipe flange welding tool is characterized by comprising: a base (1); the bent pipe fixing assembly (3), the bent pipe fixing assembly (3) is fixedly arranged on one side of the base (1) and used for fixing the bent pipe to be processed; -a laser calibration assembly (6), the laser calibration assembly (6) comprising a first laser transmitter (606) and a first target (605); the self-centering clamp (5) is used for being sleeved on a straight pipe section of the bent pipe to be processed, so that automatic centering can be performed, and the emission axis of the first laser emitter (606) is coaxially installed with the self-centering clamp (5); The three-jaw chuck (9), the three-jaw chuck (9) is used for clamping and fixing a flange to be welded, and the first target (605) is detachably arranged at the axle center position of the three-jaw chuck (9); the adjusting assembly (8) is connected with and drives the three-jaw chuck (9), and the space position of the three-jaw chuck can be adjusted in multiple degrees of freedom.
  2. 2. The elbow flange welding fixture according to claim 1, wherein the elbow fixing assembly (3) comprises: The rack (301), the rack (301) is fixedly installed on the base (1), and the rack (301) is in an L-shaped structure; the support plate (302), one side of the support plate (302) facing the bent pipe is provided with a plurality of centering clamps, and the centering clamps are used for centering and clamping the bent pipe; The pushing mechanism is used for driving the bearing plate (302) to linearly move, the pushing mechanism comprises a screw rod (303), the screw rod (303) is in threaded connection with one side of the bearing plate (302), the end face of the bearing plate (302) is limited by the end part of the screw rod (303) and is in rotary connection with the screw rod, and the bearing plate (302) is limited by one side of the placing frame (301) and is in sliding connection with the placing frame.
  3. 3. The elbow flange welding fixture according to claim 2, wherein the centering fixture comprises: the mounting box (304) is fixedly or movably connected to the bearing plate (302); A bi-directional screw (305), the bi-directional screw (305) rotatably mounted within a mounting box (304); And the two clamping plates (306) are respectively connected with the opposite threaded ends of the two sides of the bidirectional screw rod (305) in a threaded manner.
  4. 4. The bent pipe flange welding tool according to claim 1, wherein a driving mechanism is further arranged on one side of the base (1) and used for integrally adjusting the positions of the self-centering clamp (5) and the laser calibration assembly (6), the driving mechanism comprises a linear driving mechanism and a deflection mechanism, the linear driving mechanism is used for driving the self-centering clamp (5) and the laser calibration assembly (6) to linearly move, and the deflection mechanism is used for driving the self-centering clamp (5) and the laser calibration assembly (6) to deflect to one side.
  5. 5. The elbow flange welding fixture of claim 4, wherein the linear driving mechanism comprises: the mounting shell (2), the said mounting shell (2) is set up on base (1); a drive screw (10), the drive screw (10) being rotatably mounted in the mounting housing (2); The output end of the first motor (11) is fixedly connected with the end of the driving screw rod (10); the self-centering clamp (5) is arranged above the driving frame (4), and the driving frame (4) is in threaded connection with the driving screw rod (10); The limiting groove (201) is formed in the top of the installation shell (2) in a radial direction, and the upper part of the driving frame (4) penetrates through the limiting groove (201) and is limited by the limiting groove (201) and is in sliding connection with the limiting groove (201); The deflection mechanism comprises a deflection groove (202), and the deflection groove (202) is transversely arranged on the installation shell (2) and is communicated with the tail end of the limit groove (201).
  6. 6. The bent pipe flange welding fixture as set forth in claim 5, wherein the self-centering fixture (5) comprises a supporting ring (501), a plurality of radially extending limiting grooves (503) are uniformly formed in the supporting ring (501) along the circumferential direction, driving rods (508) are arranged in the limiting grooves (503) in a limiting sliding mode, positioning frames (504) are fixedly arranged on one sides of the driving rods (508), a driving mechanism is arranged on one side of the supporting ring (501), and the driving mechanism is used for synchronously driving all the driving rods (508) to linearly move along the corresponding limiting grooves (503), and comprises: The pushing ring (502), the pushing ring (502) is limited to rotate on one side of the supporting ring (501); The driving grooves (505) are formed in the pushing ring (502), the driving grooves (505) are arranged in an arc-shaped structure, and one side of the driving rod (508) extends into the corresponding driving groove (505) and is connected with the driving rod in a sliding manner; a rotating mechanism for driving a push ring (502) to rotate about its axis, the rotating mechanism comprising: a second motor (510), the second motor (510) being fixedly mounted on the support ring (501); a first gear (507), the first gear (507) being fixedly mounted on the output shaft of the second motor (510); the first toothed ring (506), first toothed ring (506) cup joints and fixes on push ring (502), first gear (507) and first toothed ring (506) meshing are connected.
  7. 7. The welding fixture for the bent pipe flange according to claim 6, wherein the axial positions of the supporting ring (501) and the pushing ring (502) are kept parallel to the axial line of the centering fixture on a vertical plane in an initial state, a bearing ring (14) is installed above the driving frame (4), the supporting ring (501) is installed on the bearing ring (14), and an elastic telescopic rod is installed between the bearing ring (14) and the driving frame (4), and comprises: The bearing rod (12), the bearing rod (12) is fixedly installed on the driving frame (4); The sliding cylinder (13), the sliding cylinder (13) is fixedly arranged at one side of the bearing ring (14), and the sliding cylinder (13) is slidably sleeved at the outer side of the bearing rod (12); the elastic piece (15), the said elastic piece (15) is fixedly connected between slide cylinder (13) and bearing rod (12); The inner end of the locating rack (504) is rotationally connected with a rolling column (509), a rotating sleeve (16) is arranged on the bearing ring (14) in a penetrating mode in a transmission mode, the supporting ring (501) is fixedly sleeved on one side of the rotating sleeve (16), a rotating mechanism is arranged on one side of the rotating sleeve (16), the rotating mechanism is used for driving the rotating sleeve (16) to rotate around the axis position of the rotating sleeve, a polishing mechanism is arranged in the rotating sleeve (16), and the polishing mechanism comprises polishing sheets (22) arranged in the rotating sleeve (16), and comprises: A third motor (19), the third motor (19) being fixedly mounted on the carrier ring (14); a second gear (18), the second gear (18) being fixedly mounted on the output shaft of the third motor (19); the second toothed ring (17), the second toothed ring (17) is fixedly sleeved on the rotating sleeve (16), and the second gear (18) is meshed with the second toothed ring (17); the grinding mechanism further comprises: the installation cover (20) is detachably inserted on one side of the rotating sleeve (16) through bolts or other fasteners; the second electric push rod (21), the flexible end of second electric push rod (21) passes installation lid (20) and extends to the interior chamber of rotating sleeve (16), polishing piece (22) detachably installs on the flexible end of second electric push rod (21).
  8. 8. The welding fixture for the bent pipe flange according to claim 7, wherein at least one pipe wall defect detection component (7) is further installed on one side of the pushing ring (502), and the pipe wall defect detection component (7) comprises: a slide rod (701), wherein the slide rod (701) radially slides on one side of the driving rod (508); The contact balls (703) are embedded in the inner ends of the sliding rods (701) in a rolling way, so that the radially inward pretightening force is provided for the sliding rods (701), and the contact balls (703) are always attached to the pipe wall; a spring (704), wherein the spring (704) is fixedly connected between the sliding rod (701) and the driving rod (508); a pointer (705), wherein the pointer (705) is connected to one side of the sliding rod (701); a scale plate (702), the scale plate (702) being fixedly mounted on the drive rod (508); The pipe wall defect detection assembly (7) further comprises a stroke amplifying mechanism, wherein the stroke amplifying mechanism is used for amplifying the tiny linear displacement of the sliding rod (701) and then transmitting the amplified tiny linear displacement to the pointer (705), and the stroke amplifying mechanism comprises a speed change gear box (706).
  9. 9. The elbow flange welding fixture according to claim 1, wherein the laser calibration assembly (6) further comprises a self-checking adjustment mechanism comprising: A second laser transmitter (607), said second laser transmitter (607) being mounted coaxially opposite to the first laser transmitter (606); the second target (603) is fixedly arranged on one side of the axis position of the support ring (501) and used for providing a calibration standard; the third electric push rod (601), the third electric push rod (601) is fixedly arranged on the bearing ring (14); the adjusting cradle head (602) is detachably arranged on the telescopic end of the third electric push rod (601); the adjusting cradle head (602), wherein an installing seat (604) is fixedly arranged at the adjusting end of the adjusting cradle head (602), and the first laser emitter (606) and the second laser emitter (607) are both arranged on the installing seat (604); The adjustment assembly (8) comprises: A carrying seat (801), the carrying seat (801) being slidably mounted on the base (1); The driving shell (804), the driving shell (804) is arranged above the bearing seat (801), and an electric telescopic rod (802) is arranged between the bearing seat (801) and the driving shell (804); a support frame (803), the support frame (803) being slidably mounted within the drive housing (804), the three-jaw chuck (9) being fixedly mounted on the support frame (803); The telescopic end part of the fourth electric push rod (805) is fixedly connected with the support frame (803); The fifth electric push rod (806), the fifth electric push rod (806) is fixedly arranged on the base (1), and the end part of the telescopic end of the fifth electric push rod (806) is fixedly connected with the bearing seat (801); The first target (605) and the second target (603) are made of four-quadrant photoelectric detectors, a control mechanism (23) is further installed on the base (1), a signal processing unit and a driving control unit are integrated in the control mechanism (23), and the control mechanism (23) is electrically connected with the first target (605), the second target (603), the third electric push rod (601), the adjusting cradle head (602), the fourth electric push rod (805), the fifth electric push rod (806) and the electric telescopic rod (802).
  10. 10. An automatic calibration method for welding an elbow flange is realized based on the elbow flange welding fixture as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps: s1, placing an elbow to be welded on an elbow fixing assembly (3), then clamping the elbow by using a middle clamp, and clamping a flange to be welded by using a three-jaw chuck (9); s2, moving the self-centering clamp (5) to a designated position through a driving mechanism to enable the self-centering clamp to be sleeved on a straight pipe section of the bent pipe, and automatically centering and clamping the straight pipe section by utilizing the self-centering clamp (5), so that the axial position of a port of the bent pipe is established; S3, starting a first laser transmitter (606), and radiating laser beams to a first target (605) immediately; S4, the control mechanism (23) receives the light spot position signal fed back by the first target (605), a driving instruction is generated after the light spot position signal is processed, the adjusting assembly (8) is started, the three-jaw chuck (9) and the flange are subjected to multi-degree-of-freedom position adjustment until the laser light spot is accurately aligned to the center of the first target (605), and automatic and high-precision coaxial alignment of the flange and the bent pipe is realized; S5, after centering, resetting the self-centering clamp (5) and the laser calibration assembly (6), and then deflecting and moving out of a welding operation area to thoroughly avoid spatial interference, and then performing welding operation.

Description

Bent pipe flange welding tool and automatic calibration method Technical Field The application relates to the technical field of equipment for welding a bent pipe flange, in particular to a bent pipe flange welding tool and an automatic calibration method. Background In the fields of petrochemical industry, hydraulic engineering, urban water supply and drainage and the like, an elbow pipe is a core component for changing the direction and the drift diameter of a pipeline. The ends of the elbow typically require welding flanges to connect to a valve, pump body or other piece of tubing. The welding quality of the flange directly determines the tightness, the bearing capacity and the safety and reliability of long-term operation of the pipeline system. Because of the structural nature of the elbow itself, manual pairing and welding of flanges at both ends is a very time consuming and highly dependent task on the skill of the operator. The operator needs to control the gesture of the bent pipe and the position of the flange simultaneously, and spot welding is performed in the state, so that the precision and consistency are difficult to ensure in the whole process. Therefore, special welding tools are often used in the industry to assist in welding the bent pipe flange, so that welding efficiency and welding quality are improved. The prior art publication No. CN213646501U provides a frock for welding of reducing water supply return bend flange, and the device can be respectively with the flange installation on first flange installation department and second flange installation department through setting up first flange installation department, second flange installation department and positioning mechanism to the welding connection between follow-up reducing water supply pipe and the flange of being convenient for has effectively reduced welding error, has improved welding efficiency. In the prior art scheme, the manual fixing flange can be replaced, so that the butt joint efficiency of the flange and the bent pipe is improved to a certain extent, but the following defects still exist, and in actual welding production, in order to ensure the connection strength and sealing reliability of the bent pipe and the flange, the flange is not allowed to be directly welded on an arc-shaped port of the bent pipe. The standard process is to weld a short straight pipe section at two ends of the bent pipe, and then weld the flange at the end of the straight pipe section. In the subsequent welding process, the port of the straight pipe section and the port of the flange are required to be strictly coaxially aligned so as to ensure the welding quality. However, the concentricity of the above technical solution and most of such tools existing in the market is difficult to be efficiently and accurately calibrated. The whole centering process still completely depends on the observation of operators by naked eyes, and repeated manual adjustment and verification are carried out by means of simple measuring tools such as a ruler, an angle square and the like. The operation mode highly dependent on manual experience not only makes the centering precision difficult to be stably ensured and causes the defects of easy occurrence of misalignment, uneven gaps and the like of the welding joint so as to influence the quality reliability of the whole pipeline system, but also greatly increases the auxiliary operation time in the tedious manual adjustment process and severely restricts the improvement of the whole welding efficiency. In view of this, we propose a bent flange welding tool and an automatic calibration method. Disclosure of Invention 1. Technical problem to be solved The application aims to provide a bent pipe flange welding tool and an automatic calibration method, which solve the problems that in the prior art, the whole centering process still depends on naked eye observation by an operator, and repeated manual adjustment and calibration are carried out by means of simple measuring tools such as a ruler, an angle square and the like, and the operation mode which depends on manual experience is greatly reduced, so that the dependence on the professional skill and long-term experience of an operator is greatly reduced, and a worker after basic training can also complete high-precision centering operation quickly and reliably. 2. Technical proposal The embodiment of the application provides a bent pipe flange welding tool, which comprises the following steps: A base; The bent pipe fixing assembly is fixedly arranged on one side of the base and used for fixing the bent pipe to be processed; a laser calibration assembly including a first laser transmitter and a first target; The self-centering clamp is used for being sleeved on a straight pipe section of the bent pipe to be processed, so that automatic centering can be performed, and the emission axis of the first laser emitter is coaxially installed with the self-centering clamp