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CN-121339799-B - Special-shaped automobile motor water inlet pipe assembly and welding tool thereof

CN121339799BCN 121339799 BCN121339799 BCN 121339799BCN-121339799-B

Abstract

The invention discloses a special-shaped automobile motor water inlet pipe assembly and a welding tool thereof, relates to the technical field of pipeline welding tools, and aims to solve the technical problem that special-shaped spiral pipelines are difficult to weld. The welding tool disclosed by the invention is cooperated with a multi-mode welding assembly through an innovative clamping mechanism, and has the beneficial effects that the valve module capable of switching the gas path state is used for controlling the driving moving rod, so that the welding gun groups at the inner side and the outer side can be precisely driven to perform opposite, opposite or synchronous compound movements on the arc-shaped guide rail matched with the curvature of a workpiece, and therefore, the multi-mode welding with precise centering and positioning and self-adaptive pressure control and the long-acting pressure maintaining function after welding are integrated on a single device, the high-precision and high-flexibility welding of complex space components is realized, and the technical problems of low welding precision and poor efficiency of special-shaped spiral pipelines are solved.

Inventors

  • LIU SHENGTAO
  • GONG YINGSHU

Assignees

  • 宁波运生工贸有限公司

Dates

Publication Date
20260512
Application Date
20251218

Claims (9)

  1. 1. A welding tool for a special-shaped automobile motor water inlet pipe assembly is characterized by comprising a machine tool (1), wherein a clamping mechanism (2) and a welding assembly (3) are arranged on a workbench of the machine tool (1), the clamping mechanism (2) comprises a tool clamping unit (22) and a tool feeding unit (23), the welding assembly (3) is two groups of welding units capable of longitudinally translating, each group is provided with two welding members which are matched with the welding position of the end part of a spiral pipeline (421), one group is welded in the spiral pipeline (421) and a communicating pipeline (422), the other group is welded outside the spiral pipeline (421) and the communicating pipeline (422), and the inner and outer welding members of the same horizontal plane move around the same circular arc during welding; the split welding unit comprises a welding module (31) and a valve module (32) which longitudinally move on a machine tool (1); Any one of the welding modules (31) includes: a welding end plate (315) capable of moving to a welding position, wherein two arc-shaped movable welding gun groups (3114) are arranged on the end plate, and the circle center of a moving track of the welding gun groups is matched with the rotation central axis of a welding surface; The welding end plate (315) is communicated with a first pipeline (317) and a second pipeline (318) which are coaxial with two ends of the bent channel (316); the movable rod (319) is arranged in the first pipeline (317) and the bent channel (316) in a sealing sliding manner, the telescopic rods (3110) are fixedly connected to two end plates of the movable rod (319), and the output ends of the telescopic rods (3110) are hinged with the welding gun group (3114); The on-off state of the gas circuit can be switched through the valve module (32), and the moving rod (319) is driven to drive the welding gun group (3114) to move in opposite directions or in opposite arcs.
  2. 2. The welding fixture for the special-shaped automobile motor water inlet pipe assembly according to claim 1, wherein the fixture clamping unit (22) comprises a circular frame (221) which is slidably mounted on a linear guide rail, a plurality of limiting holes (222) are formed in one side of the circular frame (221) in an annular array, supporting rods (223) are slidably matched with each limiting hole (222) through pneumatic sliding blocks, the supporting rods (223) can be synchronously gathered or unfolded, spiral supporting plates (224) are fixedly connected to the end parts of the supporting rods (223), and grooves matched with the shapes of spiral pipelines (421) to be welded and communicating pipelines (422) are formed in the spiral supporting plates (224).
  3. 3. The welding fixture for the special-shaped automobile motor water inlet pipe assembly according to claim 2, wherein the fixture feeding unit (23) comprises a circular end plate (231) slidably mounted on the other linear guide rail, a movable disc (232) is rotatably arranged on one side of the circular end plate (231), a first hydraulic cylinder (233) is hinged on the frame (21), the output end of a piston rod of the first hydraulic cylinder (233) is hinged with one side of the movable disc (232), a plurality of combination blocks (234) are slidably matched between the circular end plate (231) and the movable disc (232) in an annular array, and two guide inserting sheets on each combination block (234) are respectively inserted into corresponding guide holes on the circular end plate (231) and the movable disc (232).
  4. 4. A welding fixture for a special-shaped automobile motor water inlet pipe assembly according to claim 3 is characterized in that when a workpiece is clamped, a piston rod of a first hydraulic cylinder (233) extends out to drive a movable disc (232) to rotate relative to a circular end plate (231), the rotation is converted into synchronous radial outward movement of a plurality of combined blocks (234) through constraint of an arc-shaped guide hole, a channel for the workpiece to pass through is formed between the combined blocks (234) and a spiral supporting plate (224), when the workpiece is fixed, the piston rod of the first hydraulic cylinder (233) retracts to drive the movable disc (232) to reversely rotate to force the combined blocks (234) to synchronously move radially inwards, and the inner end surfaces of the combined blocks (234) push the spiral supporting plates (224) contacted with the combined blocks to be gathered towards the center along supporting rods (223) until grooves of the combined blocks are tightly adhered to and tightly hold the outline of a spiral pipeline (421) and a communicating pipe (422).
  5. 5. The welding fixture for the special-shaped automobile motor water inlet pipe assembly according to claim 4, wherein the welding module (31) further comprises a limiting base (311), the limiting base (311) is fixedly arranged on a workbench of a machine tool (1), a mounting frame (312) is slidably arranged above the limiting base (311), guide rods (313) are sleeved in holes in the mounting frame (312) in a sliding mode, hydraulic rods (314) are hinged to inner walls of two sides of the mounting frame (312), output ends of the hydraulic rods (314) are hinged to end portions of the guide rods (313), the welding end plates (315) are fixedly connected to moving ends of the guide rods (313), the moving rods (319) are hermetically sleeved in one of the channels (317) and the curved channel (316), arc-shaped guide rails (3111) are fixedly connected to two side faces of the welding end plates (315), arc-shaped branches (3112) are arranged in symmetrical structure sliding sleeves in the arc-shaped guide rails (3111), straight guide rails (3113) are slidably arranged on the arc-shaped guide rails (3111), and the arc-shaped guide rails (3113) are located on the circle centers of the arc-shaped guide rails (3113).
  6. 6. The welding fixture of the special-shaped automobile motor water inlet pipe assembly according to claim 5, wherein the valve module (32) comprises a hollowed-out ball body (321), the hollowed-out ball body (321) is sleeved inside the first pipeline (317), a first through hole (322) is formed in the surface of the hollowed-out ball body (321), the first through hole (322) is coaxial and communicated with a hole on the first pipeline (317), an inner ball body (323) is sleeved in the hollowed-out ball body (321) in a sealing and rotating mode, the inner wall of the hollowed-out ball body (321) is fixedly connected with a micro motor (324), the output axis of the micro motor (324) is located in the inner wall of the inner ball body (323) and coincides with the rotation axis of the inner ball body (323), a shell of the micro motor (324) is sealed to penetrate through the inner wall of the hollowed-out ball body (321), the output shaft of the hollow-out ball body is fixedly connected coaxially and drives the inner ball body (323) to rotate, a main flow hole (325) is formed in a symmetrical structure, a flow hole (326) perpendicular to the axis of the main flow hole (325) is formed in the side surface of the inner ball body (323), and an interface (327) with a limiting protruding strip is sleeved inside the auxiliary pipeline (317).
  7. 7. The welding fixture of the special-shaped automobile motor water inlet pipe assembly according to claim 6, wherein the inner sphere (323) can rotate through the operation of the micro motor (324), when the main flow hole (325) is communicated with the connector (327), the first pipelines (317) on the two welding end plates (315) are communicated with the second pipelines (318), when the auxiliary flow hole (326) is communicated with the connector (327), one main flow hole (325) is communicated with the first through hole (322) for discharging gas, and when neither the main flow hole (325) nor the auxiliary flow hole (326) is communicated with the connector (327), the first pipelines (317) on each welding end plate (315) are not communicated with the second pipelines (318), and the first pipelines (317) form a sealed cavity through the end part of the movable rod (319).
  8. 8. The welding fixture of the special-shaped automobile motor water inlet pipe assembly according to claim 7, wherein when a main flow hole (325) on one welding end plate (315) is communicated with the connector (327), a secondary flow hole (326) on the other welding end plate (315) is communicated with the connector (327), gas is filled into or pumped out of a second pipeline (318) on one welding end plate (315), the gas flows through a bent channel (316), the gas pressure is increased, one moving rod (319) is pushed to translate, the gas in the end cavity of the first moving rod (319) is compressed, the pressure is transmitted to the end cavity of the second moving rod (319), the second moving rod (319) is pushed to move in the opposite direction, and the acting force is applied to a straight guide rail (3113) through a telescopic rod (3110), so that two welding gun groups (3114) are symmetrically, oppositely or oppositely axially moved.
  9. 9. The welding fixture for the special-shaped automobile motor water inlet pipe assembly according to claim 8, wherein when the auxiliary flow holes (326) on the two welding end plates (315) are communicated with the connector (327) and gas is filled or pumped out of the two second pipelines (318) simultaneously, the two moving rods (319) are driven by the same air pressure to synchronously move towards the same direction, and the two welding end plates (315) can drive the welding gun group (3114) to synchronously move from one end point to the other end point of the track, so that the welding gun group can continuously move in an arc shape consistent with the track.

Description

Special-shaped automobile motor water inlet pipe assembly and welding tool thereof Technical Field The invention relates to the technical field of pipeline welding tools, in particular to a special-shaped automobile motor water inlet pipe assembly and a welding tool thereof. Background At present, in the field of manufacturing of automobile motor cooling systems, a special-shaped spiral water inlet pipe (shown in figure 13) is applied because the special-shaped spiral water inlet pipe can increase the heat exchange area and guide the flow to improve the heat dissipation efficiency, however, the workpiece has a complex space three-dimensional spiral configuration, a welding port of the special-shaped spiral water inlet pipe is usually positioned on an irregular curved surface and has strict requirements on coaxiality and circumferential alignment; The existing welding equipment or tool is single in function, welding action of a specific angle or a simple track is usually realized, process flexibility is lacked, for welding of a special-shaped spiral water inlet pipe, continuous seam welding is needed, high-precision port centering and pre-tightening are required to be carried out before welding, pressure is dynamically adjusted in welding according to the heated condition of a workpiece, stable long-acting pressure maintaining is provided for special processes such as stress relief annealing after welding, and the like. Disclosure of Invention The invention aims to provide a special-shaped automobile motor water inlet pipe assembly so as to solve the technical problem that special-shaped spiral pipelines are difficult to weld. In order to solve the technical problems, the invention provides the technical scheme that the special-shaped automobile motor water inlet pipe assembly comprises a motor main body, a motor shell arranged on the motor main body and a water inlet pipe arranged in the motor shell, wherein the water inlet pipe comprises a middle spiral pipeline and two communicating pipelines, the two communicating pipelines are respectively welded and communicated with two ends of the middle spiral pipeline, the pipeline diameter of the spiral pipeline is smaller than that of the communicating pipeline, a welding surface A and a welding surface B at two ends of the spiral pipeline are positioned on the outer side wall of a pipe body of the special-shaped automobile motor water inlet pipe assembly, and the directions of the two welding surfaces are respectively perpendicular to the axial directions of the communicating pipelines required to be welded. The invention also provides a welding tool for welding the special-shaped automobile motor water inlet pipe assembly, which comprises a machine tool, wherein a clamping mechanism and a welding assembly are arranged on a workbench of the machine tool, the clamping mechanism comprises a tool clamping unit and a tool feeding unit, and the welding assembly is two groups of split welding units capable of longitudinally translating; The split welding unit comprises a welding module and a valve module which longitudinally move on a machine tool; Any one of the welding modules includes: the welding end plate can move to a welding position, two arc-shaped movable welding gun groups are arranged on the end plate, and the circle center of a moving track of the welding gun groups is matched with the rotation central axis of the welding surface; the welding end plate is communicated with a first pipeline and a second pipeline which are coaxial with the two ends of the bent channel; The movable rod is arranged in the first pipeline and the bent channel in a sealing sliding manner, the telescopic rods are fixedly connected to two end plates of the movable rod, and the output ends of the telescopic rods are hinged with the welding gun group; The on-off state of the gas circuit can be switched through the valve module, and the moving rod is driven to drive the welding gun group to move in opposite directions or in opposite arcs. Preferably, the frock clamping unit includes slidable mounting circular frame on linear guide, circular frame one side is annular array and has seted up a plurality of spacing holes, and every spacing downthehole a plurality of bracing pieces that slide through pneumatic slider and be fit with, and a plurality of bracing pieces can gather together or expand in step, and every bracing piece tip all fixedly connected with spiral fagging, all processing have on every spiral fagging with wait welded spiral pipeline and communicating pipe appearance assorted recess. Preferably, the tool feeding unit comprises a circular end plate slidably mounted on another linear guide rail, a movable disc is rotatably arranged on one side of the circular end plate, a first hydraulic cylinder is hinged on the frame, the output end of a piston rod of the first hydraulic cylinder is hinged with one side of the movable disc, a plurality of combined blocks are slidably adapt