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CN-122007741-A - Wheel hub steel ring girth welding set

CN122007741ACN 122007741 ACN122007741 ACN 122007741ACN-122007741-A

Abstract

The invention discloses a wheel hub steel ring circumferential seam welding device, which relates to the technical field of automobile manufacturing and has the advantages of stably conducting a welding loop and keeping a clamping surface continuously clean; the fixture assembly comprises a lower disc body and an upper disc body which are coaxially arranged and are connected through a plurality of struts, an accommodating groove for accommodating the hub steel ring is formed in the upper surface of the upper disc body, concave arc grooves are uniformly formed in the groove walls of the accommodating groove, the groove bottoms of the arc grooves extend to the lower portion of the upper disc body to form openings, clamping blocks matched with the outer wall of the hub steel ring are rotationally connected in the accommodating groove, the bottom ends of the clamping blocks extend to the position between the lower disc body and the upper disc body, and a clamping structure for controlling the clamping blocks to rotate so as to clamp or loosen the hub steel ring is arranged between the lower disc body and the upper disc body.

Inventors

  • MA JUNCHAO

Assignees

  • 江苏俊超电动车配件制造有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. The wheel hub steel ring circumferential seam welding device comprises a bracket (1), a wheel hub steel ring (2) and a welding robot (3) arranged on the bracket (1), and is characterized by further comprising a clamp assembly; The clamp assembly comprises a lower disc body (4) and an upper disc body (5) which are coaxially arranged, and the lower disc body and the upper disc body are connected through a plurality of struts (6); The upper surface of the upper disc body (5) is provided with a containing groove (7) for containing the hub steel ring (2), the groove wall of the containing groove (7) is uniformly provided with concave arc-shaped grooves (8), and the groove bottom of the arc-shaped grooves (8) extends to the lower part of the upper disc body (5) to form an opening; The clamping block (9) which is matched with the outer wall of the hub steel ring (2) is rotationally connected to the accommodating groove (7), the bottom end of the clamping block (9) extends between the lower disc body (4) and the upper disc body (5), and a clamping structure for controlling the clamping block (9) to rotate so as to clamp or loosen the hub steel ring (2) is arranged between the lower disc body (4) and the upper disc body (5); The support (1) is provided with a carbon brush conductive structure (10) matched with the lower disc body (4), and the clamp assembly is internally provided with a conduction path so that current is led to the clamping block (9) through the carbon brush conductive structure (10).
  2. 2. A wheel hub steel ring circumferential seam welding apparatus as claimed in claim 1, wherein said clamping structure comprises a first stub shaft (12) rotatably connected to the lower disc (4), said first stub shaft (12) having a driving gear (13) nested thereon and coaxially fixed with the first stub shaft (12); The upper surface of the lower disc body (4) is also rotationally connected with three second short shafts (14) which are uniformly arranged, each second short shaft (14) is coaxially fixed with a follow-up gear (15) which is meshed with the driving gear (13), each follow-up gear (15) is fixedly provided with a connecting rod (16), and the tail end of the connecting rod (16) is fixedly connected with the bottom end of the corresponding clamping block (9).
  3. 3. The wheel hub steel ring circumferential seam welding device according to claim 2, wherein the side wall of the lower disc body (4) is provided with a concave movable groove (17), and the bottom end of the first short shaft (12) extends into the movable groove (17) and is rotationally connected with the bottom of the movable groove (17); A first swing rod (18) is fixed on the shaft section of the first short shaft (12) positioned in the movable groove (17), and a spring piece is connected between the first swing rod (18) and the side wall of the movable groove (17); the support (1) is rotationally connected with a second swing rod (19), the second swing rod (19) is located beside the movable groove (17) and is arranged corresponding to the first swing rod (18), a second motor (20) is fixed on the support (1), and the output end of the second motor (20) is connected with the second swing rod (19).
  4. 4. A wheel hub steel ring circumferential seam welding device according to claim 3, wherein a conductive ring is fixed on the upper surface of the lower disc body (4), and the carbon brush end part of the carbon brush conductive structure (10) is in sliding contact with the conductive ring; the lower disc body (4), the first short shaft (12), the first swing rod (18), the driving gear (13), the follow-up gear (15), the second short shaft (14) and the connecting rod (16) are all made of insulating materials; The tail end of the connecting rod (16) is fixedly provided with a copper sliding block, the upper end and the lower end of the copper sliding block penetrate out of the connecting rod (16), the copper sliding block penetrating out of the lower end of the connecting rod (16) is connected with the conducting ring in a sliding manner, and the copper sliding block penetrating out of the upper end of the connecting rod (16) is connected with the clamping block (9); the clamping blocks (9) are made of conductive materials.
  5. 5. A hub steel ring circumferential seam welding apparatus as claimed in claim 1, wherein the interface of the clamping block (9) and the hub steel ring (2) is provided with knurling.
  6. 6. The wheel hub steel ring circumferential seam welding device according to claim 1, wherein the positions of the upper disc body (5) corresponding to the arc grooves (8) are respectively provided with mounting cavities, and each mounting cavity is internally provided with an air guide component; the air guide assembly comprises a piston compression mechanism, a valve mechanism, a trigger mechanism and a transmission mechanism which are arranged in the installation cavity.
  7. 7. The wheel hub steel ring circumferential seam welding device according to claim 6, wherein the piston compression mechanism comprises a guide pipe (21) fixed in the mounting cavity, a first baffle plate (22), a second baffle plate (23) and a third baffle plate (24) are sequentially arranged in the guide pipe (21) along the axial direction, and the inner cavity of the guide pipe (21) is divided into a first cavity (25), a second cavity (26), a third cavity (27) and a fourth cavity (28) which are sequentially communicated; A supporting plate is fixed in the first cavity (25), a first guide hole penetrates through the supporting plate, a sliding rod (29) is slidably connected in the first guide hole, one end of the sliding rod (29) extends out of the guide pipe (21), and a piston (30) in sliding sealing fit with the first cavity (25) is fixed at the other end of the sliding rod; one end of the sliding rod (29) extending out of the guide pipe (21) is connected with a U-shaped rod (31), and the U-shaped rod (31) is connected with a transmission mechanism.
  8. 8. A wheel hub steel ring circumferential seam welding apparatus as claimed in claim 7, wherein said valve mechanism comprises a first spring (32) and a rubber block (33) provided in the second cavity (26), one end of said first spring (32) is fixed to the inner wall of the second cavity (26), and the other end is connected to the rubber block (33); The first partition plate (22) is provided with a second guide hole (34) communicated with the first cavity (25) and the second cavity (26), and the rubber blocking block (33) seals the second guide hole (34); A third guide hole (35) which is communicated with the second cavity (26) and the third cavity (27) is formed in the second partition plate (23), a guide pillar (36) is slidably connected in the third guide hole (35), and a rubber sealing ring for sealing the third guide hole (35) is fixed at the end part of the guide pillar (36); A fourth guide hole (37) for communicating the third cavity (27) and the fourth cavity (28) is formed in the third partition plate (24), and the guide pillar (36) penetrates through the fourth guide hole (37) and is in sliding connection with the fourth guide hole (37); A connecting ring (38) is fixed on the guide post (36), a second spring (39) is fixed on the third partition plate (24), and the other end of the second spring (39) is fixedly connected with the connecting ring (38); the second partition plate (23) is connected with an air guide pipe (50), and the air guide pipe (50) is communicated with the third guide hole (35).
  9. 9. A wheel hub steel ring circumferential seam welding apparatus as claimed in claim 8, wherein said trigger mechanism comprises a movable rod (40) slidably connected in the fourth cavity (28), a push block (41) being fixed to an end of the movable rod (40); The installation cavity is connected with a push rod (42) in a sliding manner, the push rod (42) is connected with the outer wall of the guide pipe (21) through a third spring (43), and one end, far away from the guide pipe (21), of the push rod (42) penetrates into the arc-shaped groove (8).
  10. 10. A wheel hub steel ring circumferential seam welding apparatus as claimed in claim 9, wherein the transmission mechanism comprises a third stub shaft rotatably connected to the inside of the installation cavity, a circular plate (44) is coaxially fixed on the third stub shaft, and a fourth stub shaft (45) is eccentrically fixed on the circular plate (44); The fourth short shaft (45) is sleeved with a strip-shaped plate (46), a strip-shaped hole (47) is formed in the strip-shaped plate (46), and the fourth short shaft (45) penetrates through the strip-shaped hole (47) and is connected with the strip-shaped hole (47) in a sliding mode; A push rod (48) is fixed on the strip-shaped plate (46), and the push rod (48) is fixedly connected with the U-shaped rod (31); a follow-up block (52) is fixed on the clamping block (9), a strip-shaped chute (49) which is communicated with the arc-shaped chute (8) and the installation cavity is formed in the wall of the arc-shaped chute (8), and the follow-up block (52) penetrates through the strip-shaped chute (49) and is connected with the strip-shaped chute (49) in a sliding manner; A rack (51) is connected in the mounting cavity in a sliding way, and an extension block (53) matched with the other push rod (48) is fixed on the rack (51); A movable gear (54) meshed with the rack (51) is fixed on the third short shaft.

Description

Wheel hub steel ring girth welding set Technical Field The invention relates to the technical field of automobile manufacturing, in particular to a hub steel ring circumferential seam welding device. Background The wheel hub steel ring is used as a key bearing part of an automobile wheel hub, the circumferential seam welding quality of the wheel hub steel ring directly influences the safety performance and the service life of the wheel hub, and at present, the circumferential seam welding of the wheel hub steel ring mostly adopts submerged arc automatic welding, and the wheel hub steel ring needs to rotate at a constant speed in the welding process so as to finish the forming of the whole circle of welding seam of the wheel hub steel ring. In the existing welding device for the wheel rim, an independent ground clamp is generally adopted for grounding (grounding) of a welding loop, the welding loop is directly clamped on the outer wall or the edge of the wheel rim through a crocodile clamp or a C-shaped clamp, and the rear end of the ground clamp is connected with a thicker cable so as to bear welding current. However, when the hub steel ring is rotationally welded, the ground wire clamp and the cable thereof rotate together with the workpiece, so that the winding and torsion are very easy to occur, and the cable is subjected to fatigue fracture, joint loosening or contact pressure change. Practice shows that the bonding mode has the following defects that continuous rotation of a workpiece is limited due to the cable winding problem, multi-circle continuous welding is difficult to achieve, welding current is fluctuated due to poor contact, air holes, slag inclusion and the like are prone to occurring in welding seams, and the position of a ground wire clamp is required to be adjusted manually and repeatedly to influence beat and consistency of automatic welding. Disclosure of Invention Aiming at the technical defects, the invention aims to provide the wheel hub steel ring circumferential seam welding device which has the advantages of stably conducting a welding loop and keeping a clamping surface continuously clean. In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides a wheel hub steel ring circumferential seam welding device which comprises a bracket, a wheel hub steel ring, a welding robot arranged on the bracket and a clamp assembly, wherein the welding robot is arranged on the bracket; the clamp assembly comprises a lower disc body and an upper disc body which are coaxially arranged, and the lower disc body and the upper disc body are connected through a plurality of struts; The upper surface of the upper disc body is provided with a containing groove for containing the wheel hub steel ring, the groove wall of the containing groove is uniformly provided with concave arc grooves, and the groove bottom of the arc grooves extends to the lower part of the upper disc body to form an opening; the clamping block is rotationally connected with the outer wall of the wheel hub steel ring in the accommodating groove, the bottom end of the clamping block extends between the lower disc body and the upper disc body, and a clamping structure for controlling the clamping block to rotate so as to clamp or loosen the wheel hub steel ring is arranged between the lower disc body and the upper disc body; The support is provided with a carbon brush conductive structure matched with the lower disc body, and a conduction path is arranged in the clamp assembly, so that current is led to the clamping block through the carbon brush conductive structure. Through adopting above-mentioned technical scheme, through setting up the clamp structure control clamp splice rotation between lower disk body and last disk body, make the clamp splice when pressing from both sides tight wheel hub steel ring, draw the clamp splice with welding current through carbon brush conductive structure and inside conduction path, by clamp splice conduction to wheel hub steel ring again, this structure makes clamp assembly self become the part of conductive loop, need not to set up independent ground clamp additionally, thoroughly solved the problem that the cable twined, pulled along with the work piece rotation in the welding process, be applicable to continuous spin welding operating mode. The clamp splice is applied invariable, controllable clamping force to the wheel hub steel ring under the clamping structure effect, and the carbon brush conductive structure introduces rotatory anchor clamps subassembly through sliding contact, and inside conduction path is reliably transmitted the electric current to the clamp splice, compares traditional ground clamp, and this device's conductive contact is undulant along with the work piece rotation, and contact resistance is stable, and welding current is continuous steady, has effectively reduced the welding defect such as gas pocket, unfused becau