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CN-122007782-A - Welding frock that valve body processing was used

CN122007782ACN 122007782 ACN122007782 ACN 122007782ACN-122007782-A

Abstract

The invention discloses a welding tool for valve body machining, which belongs to the technical field of welding machining and comprises a stand, an inclined positioning unit and two horizontal positioning units, wherein the inclined positioning unit and the two horizontal positioning units are respectively provided with a base plate and a positioning clamping assembly, the positioning clamping assembly comprises a swivel seat, a positioning end plate and a plurality of compression arms which are circumferentially arranged, the middle part of each compression arm is rotationally connected with the positioning end plate, one end of each compression arm is provided with a clamping part, the other end of each compression arm is driven by a driving mechanism to realize clamping or loosening, the clamping part is provided with a cooling air port facing a welding seam, and the swivel seat is driven by a rotary driving mechanism to enable the positioning end plate and the compression arms to synchronously rotate. According to the invention, the welding dead zone is eliminated by controlling the rotation of the positioning and clamping assembly, 360-degree continuous welding is realized, the solidification of the welding seam is accelerated by utilizing the follow-up cooling air port, the flowing defect of a molten pool caused by gravity is effectively restrained, and the welding quality and efficiency are obviously improved.

Inventors

  • XIAO SHUPING
  • WANG ZHAOGANG
  • LEI JINFENG
  • WANG POPO

Assignees

  • 济南百惠凯希汽车零部件有限公司

Dates

Publication Date
20260512
Application Date
20260402

Claims (10)

  1. 1. Welding frock that valve body processing was used, a serial communication port, including frame stand (1), slope positioning unit (2) and two horizontal positioning unit (3), wherein, slope positioning unit (2) and two horizontal positioning unit (3) all include: a substrate (4); The positioning and clamping assembly (5) is arranged on the base plate (4) and is used for fixing a valve body port and a flange connected with the port; the positioning and clamping assembly (5) comprises a swivel base (6), a positioning end plate (7) and a plurality of pressing arms (8); The rotary seat (6) is rotatably arranged on the base plate (4); The positioning end plate (7) is fixedly arranged on the swivel base (6); The plurality of compression arms (8) are circumferentially arranged along the positioning end plate (7), the middle part of each compression arm (8) is rotationally connected with the positioning end plate (7), one end of each compression arm is provided with a clamping part (9), and the other end of each compression arm is connected with a driving mechanism (10); The driving mechanism (10) is used for driving the clamping part (9) to clamp or loosen the valve body port and the flange; A cooling air port (14) facing to the joint welding seam between the port of the valve body and the flange is also arranged on the clamping part (9); the rotary seat (6) is driven to rotate through the rotary driving mechanism (15), the positioning end plate (7) and the pressing arm (8) are driven to synchronously rotate, so that the welding area is gradually exposed to realize continuous welding of the circular seam, and the welded area is synchronously cooled through the cooling air port (14).
  2. 2. The welding fixture for valve body processing according to claim 1, wherein the clamping part (9) is provided with a first limit ball (11), a second limit ball (12) and a third limit ball (13) which are respectively used for being abutted against the outer side wall of the valve body port, the outer side wall of the flange and the end face of the flange facing the valve body; The positioning end plate (7) is embedded with a plurality of end face balls (29) at the contact part of the valve body, and the end face balls (29) are uniformly distributed on the positioning end plate (7) in the circumferential direction.
  3. 3. The welding fixture for valve body processing according to claim 2, wherein the driving mechanism (10) is arranged inside the swivel seat (6) and comprises a connecting rod (16), a pull block (17), a screw rod (18) and a spring (19); The middle part of the pressing arm (8) is provided with a guide groove (20), a guide rod (21) is arranged in the guide groove (20), the guide rod (21) is rotationally connected with the positioning end plate (7), one end of the pressing arm (8) far away from the clamping part (9) is rotationally connected with one end of the connecting rod (16), the other end of the connecting rod (16) is jogged and connected with the pull block (17), the lower part of the pull block (17) is fixedly connected with the upper end of the screw rod (18), the screw rod (18) passes through the swivel seat (6) to be connected with the base plate (4), and the lower end of the screw rod is in threaded connection with the adjusting handle (22); the screw (18) is sleeved with a spring (19), the upper end of the spring (19) is abutted against the pull block (17), the lower end of the spring is abutted against the inner wall of the rotary seat (6), the screw (18) is driven to axially move by the rotary adjusting handle (22), and the compression arm (8) is driven to rotate around the guide rod (21) through the pull block (17) and the connecting rod (16), so that the valve body port and the flange are clamped or loosened.
  4. 4. A welding fixture for valve body processing according to claim 3, characterized in that the tilt positioning unit (2) is rotatably mounted on the stand (1) and has an angle locking structure; The two horizontal positioning units (3) are symmetrically arranged on two sides of the stand (1), and the bottom of each horizontal positioning unit (3) is in sliding fit with the stand (1) and is provided with a position locking structure.
  5. 5. The welding fixture for valve body machining according to claim 4, wherein the inclined positioning unit (2) comprises a base plate (4), sliding groove guide rails (23) are arranged on two sides of the base plate (4), and locking nuts are assembled in the sliding groove guide rails (23); The stand (1) is fixedly provided with connecting blocks (25) at two sides of the inclined positioning unit (2), locking bolts penetrate through the connecting blocks (25), and the locking bolts are locked with locking nuts in the chute guide rails (23) in a matched mode and are used for adjusting and locking the inclined angle and the working position of the inclined positioning unit (2).
  6. 6. The welding fixture for valve body processing according to claim 5, wherein an electric slide rail or a manual slide rail is arranged at the bottom of the base plate (4) of the horizontal positioning unit (3) so as to realize sliding installation and locking with the stand (1).
  7. 7. The welding fixture for valve body machining according to claim 6, wherein, The rotary driving mechanism (15) comprises a driving motor (27) and a gear set (28), and the driving motor (27) is in transmission connection with the rotary seat (6) through the gear set (28); when the welding of the current port is carried out, only the rotary seat (6) corresponding to the port is in a rotary state, and all the other rotary seats (6) are kept static so as to ensure the overall stability of the valve body in the welding process.
  8. 8. The welding fixture for valve body machining according to claim 7, wherein the cooling air port (14) is externally connected with a cooling air source, the cooling air is compressed air or inert protective gas, and in the rotating process of the pressing arm (8), the welding completion area is subjected to real-time air cooling, so that solidification of a welding seam is accelerated, and molten pool flow is inhibited.
  9. 9. The welding fixture for valve body machining according to claim 8, wherein the plurality of pressing arms (8) are uniformly arranged along the circumferential direction of the positioning end plate (7) to form a circumferential multi-point clamping structure, so that the coaxial positioning of the valve body port and the flange is ensured, and the stress is uniform.
  10. 10. The welding fixture for valve body machining according to claim 9, further comprising an intelligent control module, wherein the intelligent control module is electrically connected with the rotary driving mechanism (15), the driving mechanism (10) and the cooling air port (14) respectively, a welding parameter presetting unit is arranged in the intelligent control module, the rotating speed of the rotary seat (6) and the gas jet flow and the jet angle of the cooling air port (14) can be preset according to the valve body material and the flange specification, and temperature signals of a welding area can be acquired in real time, and the rotating speed of the rotary seat and the cooling gas flow can be automatically adjusted.

Description

Welding frock that valve body processing was used Technical Field The invention relates to the technical field of welding processing, in particular to a welding tool for valve body processing. Background In the field of valve manufacturing, a Y-shaped valve, a three-way bevel valve and other complex valve bodies with a plurality of ports in different inclined directions, the welding quality of the ports and flanges directly influences the performance and the service life of products. At present, the following problems mainly exist in the welding tool for the valve body: Firstly, because the inclination directions of the ports of the valve body are different, the welding gun needs to continuously rotate 360 degrees around the circumferential seam of the ports, however, after the valve body is clamped by the existing tool clamp, dead zones are often formed on the rotating path of the welding gun by the existing tool clamp, and the welding gun and the clamp are physically interfered. Therefore, only partial angle welding can be completed in actual production, and the rest arc sections must be welded in sections. This not only results in low welding efficiency, but also is prone to defects such as unfused and blowholes. Secondly, when girth welding is carried out under an inclined posture, molten pool metal is continuously influenced by gravity components, flows to the low side of a welding line, and the balance of the surface tension of the molten pool is destroyed, so that undercut is easily generated on the upper side of the welding line, and weld flash is easily formed or is not fused on the lower side, and the forming quality and mechanical property of the welding line are influenced. Existing tools generally only pay attention to clamping reliability, and neglect the influence of dynamic dryness of a welding process on molten pool behaviors caused by gravity. Disclosure of Invention The invention aims to solve the problems in the background art and provides a welding tool for valve body machining. In order to achieve the above purpose, the present invention adopts the following technical scheme: The utility model provides a welding frock that valve body processing was used, includes stand, slope positioning unit and two horizontal positioning units, wherein, slope positioning unit and horizontal positioning unit all include: A substrate; The positioning and clamping assembly is arranged on the base plate and used for fixing a corresponding port of the valve body and a flange connected with the port; the positioning and clamping assembly comprises a swivel base, a positioning end plate and a plurality of pressing arms; the rotary seat is rotatably arranged on the substrate; the positioning end plate is fixedly arranged on the swivel base; The plurality of compression arms are circumferentially arranged along the positioning end plate, the middle part of each compression arm is rotationally connected with the positioning end plate, one end of each compression arm is provided with a clamping part, and the other end of each compression arm is connected with a driving mechanism; The driving mechanism is used for driving the clamping part to clamp or loosen the valve body port and the flange; The clamping part is also provided with a cooling air port facing to the joint weld joint of the valve body port and the flange; the rotary seat is driven to rotate by the rotary driving mechanism, so that the positioning end plate and the pressing arm are driven to synchronously rotate, the welding area is gradually exposed to realize continuous welding of the circumferential seam, and the welded area is synchronously cooled through the cooling air port. The clamping part is provided with a first limit ball, a second limit ball and a third limit ball which are respectively used for being abutted against the outer side wall of the valve body port, the outer side wall of the flange and the end face of the flange, which faces one side of the valve body; The contact part of the positioning end plate and the valve body is embedded with a plurality of end face balls which are uniformly distributed on the positioning end plate in the circumferential direction. The driving mechanism is arranged in the swivel seat and comprises a connecting rod, a pull block, a screw rod and a spring; The middle part of the pressing arm is provided with a guide groove, a guide rod is arranged in the guide groove and is rotationally connected with the positioning end plate, one end of the pressing arm, which is far away from the clamping part, is rotationally connected with one end of the connecting rod, and the other end of the connecting rod is jogged and connected with the pull block; The screw rod is sleeved with a spring, the upper end of the spring is abutted against the pull block, the lower end of the spring is abutted against the inner wall of the rotating seat, the screw rod is driven to axially move by the rotating adjusting handle, and