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CN-121972856-A - Fan impeller welding device

CN121972856ACN 121972856 ACN121972856 ACN 121972856ACN-121972856-A

Abstract

The invention relates to the technical field of fan welding, in particular to a fan impeller welding device which comprises a welding manipulator and a rotating station, and further comprises a supporting mechanism which is arranged on the rotating station and used for limiting and cooling blades spot-welded on a wheel disc, wherein both sides of the welded blades are shielded and protected by arc plates, welding slag can be prevented from adhering to the wheel disc and the blades, and the quality of each blade is ensured to be consistent with the original design, the invention reduces the difficulty of post dynamic balance correction, and simultaneously utilizes the limiting plate to clamp and limit the blade during welding, thereby preventing the blade from deflection and deformation caused by high temperature of welding, further ensuring the balance design of the impeller, indirectly improving the overall production efficiency of the impeller.

Inventors

  • MA XIN
  • ZHANG DONGMEI
  • ZHANG YANLING

Assignees

  • 科瑞特空调集团有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. The fan impeller welding device comprises a welding manipulator and a rotating station, and is characterized by further comprising a supporting mechanism which is arranged on the rotating station and used for limiting and cooling the blades spot-welded on the wheel disc; The supporting mechanism comprises an outer shaft and an inner shaft which are arranged on the rotary station through a lifting assembly, two arc plates for protecting two blades at adjacent positions of the blades to be welded and two limiting plates for clamping the blades are detachably connected to the outer shaft and the inner shaft through a connecting assembly, and the connecting assembly is used for simultaneously moving the arc plates and the limiting plates; the inside of the limiting plate is of a hollow structure, a water inlet is formed in one end, close to the axis of the wheel disc, of the limiting plate, a water outlet is formed in one end, far away from the axis of the wheel disc, of the limiting plate, circulating cooling water is introduced into the limiting plate during welding, and the blades to be welded are clamped through the limiting plate, so that the blades are cooled and limited; The high-quality blade welding operation is carried out by means of protecting, cooling and limiting the adjacent blades.
  2. 2. A fan impeller welding apparatus according to claim 1, wherein the outer shaft and the inner shaft are rotatably nested with each other, and the outer shaft and the inner shaft are rotated at the same speed in the opposite directions in synchronism.
  3. 3. The welding device for fan impellers according to claim 1, wherein the lifting assembly comprises a lifting frame which is arranged on the rotating station in a vertically sliding manner, and a hydraulic cylinder is arranged between the lifting frame and the rotating station.
  4. 4. A fan impeller welding apparatus according to claim 3, wherein the lower end of the outer shaft is rotatably connected to the middle part of the lifting frame, and the upper end of the inner shaft is rotatably connected to the upper side of the lifting frame.
  5. 5. A welding device for a fan impeller according to claim 3, wherein the driven bevel gears are fixedly installed on the upper side of the outer shaft and the upper side of the inner shaft, and the driving bevel gears meshed with the two driven bevel gears simultaneously are rotatably connected to the lifting frame.
  6. 6. The welding device for a fan impeller according to claim 5, wherein a servo gear motor is mounted on the lifting frame, an output shaft of the servo gear motor is fixedly connected with a drive bevel gear, and the drive bevel gear is located between two driven bevel gears.
  7. 7. The welding device for fan impellers according to claim 1, wherein the connecting assembly comprises four connecting frames sleeved on the outer shaft, wherein the first connecting frame and the third connecting frame from top to bottom are fixedly connected with the inner shaft, and the second connecting frame and the fourth connecting frame from top to bottom are fixedly connected with the outer shaft.
  8. 8. The welding device for the fan impeller according to claim 7, wherein studs are fixedly arranged at one ends of the arc-shaped plate and the limiting plate, which are close to the axis of the wheel disc, and are inserted into corresponding connecting frames, and then nuts are locked, so that the arc-shaped plate, the limiting plate and the corresponding connecting frames are fixed together.
  9. 9. The welding device for a fan impeller according to claim 1, wherein the arc plate is L-shaped overall, the blades are protected by a vertical section of the arc plate, and the wheel disc is protected by a horizontal section of the arc plate.
  10. 10. The welding device for a fan impeller according to claim 1, wherein the lower portion of the limiting plate has a slope structure.

Description

Fan impeller welding device Technical Field The invention relates to the technical field of fan welding, in particular to a fan impeller welding device. Background The fan impeller is used as a core pneumatic component of the fan, the manufacturing quality of the fan impeller directly determines the performance, efficiency and reliability of the whole fan, a typical centrifugal or axial flow impeller is usually formed by welding a wheel disc and a plurality of blades uniformly distributed along the circumferential direction, and the impeller is required to be subjected to strict dynamic balance correction after the welding is finished so as to eliminate unbalanced rotating centrifugal force caused by uneven mass distribution, and the dynamic balance precision is a core index for ensuring long-term stable, low-vibration and low-noise operation of the fan. At present, in order to improve the production efficiency and consistency, the automatic welding of the impeller by adopting a welding robot has become an industry trend, and a typical automatic welding process is as follows, firstly, the blade is required to be spot-welded on a designated position of the wheel disc in advance, the relative angle and the position between the blade and the wheel disc are ensured to meet the design requirements, and then, the welding robot automatically welds the joint welding seam between the blade and the wheel disc according to a preset program path so as to realize final permanent connection. However, although the automatic welding is widely applied, the prior art still has obvious defects when the impellers with densely distributed blades are welded, on one hand, the local high heat generated during the welding is easy to cause thermal deformation and deflection of the blades, which can directly destroy the balance design of the impellers, so that the subsequent dynamic balance adjustment is extremely difficult, on the other hand, the spatter slag which is splashed during the welding is easy to adhere to the surfaces of the blades, the original mass distribution of the impellers can be directly changed, and uncontrollable unbalance is also introduced, and the two problems can seriously affect the vibration, noise and operation life of the fan. Therefore, research and development of a welding device capable of simultaneously providing accurate support to prevent deformation and effectively shielding to prevent welding slag adhesion becomes an urgent technical requirement for improving the welding quality and the production efficiency of a fan impeller. Disclosure of Invention In order to solve the technical problems, the technical scheme adopted by the invention is that the fan impeller welding device comprises a welding manipulator and a rotating station, and further comprises a supporting mechanism which is arranged on the rotating station and used for limiting and cooling the blade spot-welded on the wheel disc. The supporting mechanism comprises an outer shaft and an inner shaft which are arranged on the rotary station through a lifting assembly, two arc plates used for protecting two blades at adjacent positions of the blades to be welded and two limiting plates used for clamping the blades are detachably connected to the outer shaft and the inner shaft through connecting assemblies, and the connecting assemblies are used for simultaneously moving the arc plates and the limiting plates. The limiting plate is internally of a hollow structure, a water inlet is formed in one end, close to the axis of the wheel disc, of the limiting plate, a water outlet is formed in one end, far away from the axis of the wheel disc, of the limiting plate, circulating cooling water is introduced into the limiting plate during welding, the blades to be welded are clamped through the limiting plate, and accordingly the blades are cooled and limited. The high-quality blade welding operation is carried out by means of protecting, cooling and limiting the adjacent blades. Preferably, the outer shaft and the inner shaft are nested together in a mutually rotating way, and the outer shaft and the inner shaft synchronously rotate at the same speed in the opposite direction. Preferably, the lifting assembly comprises a lifting frame which is arranged on the rotating station in a vertical sliding mode, and a hydraulic cylinder is arranged between the lifting frame and the rotating station. Preferably, the lower end of the outer shaft is rotationally connected to the middle part of the lifting frame, and the upper end of the inner shaft is rotationally connected to the upper side of the lifting frame. Preferably, driven bevel gears are fixedly arranged on the upper side of the outer shaft and the upper side of the inner shaft, and a driving bevel gear meshed with the two driven bevel gears simultaneously is rotatably connected to the lifting frame. Preferably, a servo gear motor is arranged on the lifting frame, an output shaft of the servo gear mot