Search

CN-122007757-A - Welding jig limit structure and welding jig

CN122007757ACN 122007757 ACN122007757 ACN 122007757ACN-122007757-A

Abstract

The invention relates to the technical field of automobile manufacturing, and discloses a welding fixture limiting structure and a welding fixture, wherein the welding fixture limiting structure comprises a pressing arm limiting block, a connecting plate limiting block and a connecting plate limiting block adjusting block; the invention can finely adjust the positioning structure according to the abrasion condition of a hinge connecting plate, so that the positioning pin is always at an original position, the positioning accuracy is ensured, the abrasion of a hinge joint is reduced, and the positioning deviation occurs, so that the positioning pin bears larger tension or loss of positioning accuracy.

Inventors

  • WANG XUEPENG

Assignees

  • 一汽解放汽车有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. The welding fixture limiting structure is characterized by comprising a pressing arm limiting block (1), a connecting plate limiting block (2) and a connecting plate limiting block adjusting block (3); the lower end face of the pressing arm limiting block (1) and the upper end face of the connecting plate limiting block (2) can be mutually coupled in the Y direction in a concave-convex groove structure, and the middle part of the coupling face of the pressing arm limiting block (1) and the connecting plate limiting block (2) in the length direction can be mutually and limitedly coupled in the X direction; The front side wall of the connecting plate limiting block (2) is connected with the upper end of one side wall of the aligned connecting plate limiting block adjusting block (3) in an X-direction adjustable displacement mode.
  2. 2. The welding fixture limiting structure is characterized in that a coupling rectangular groove (11) is formed in the lower end face of the pressing arm limiting block (1) in the length direction, at least two pressing arm screwing step holes (12) are formed in the coupling rectangular groove (11) in the length direction, coupling rectangular protruding blocks (21) are arranged on the upper end face of the connecting plate limiting block (2) in a matched mode corresponding to the position of the coupling rectangular groove (11), the coupling rectangular groove (11) and the coupling rectangular protruding blocks (21) can be buckled in a matched mode, connecting plate screwing step holes (22) are formed in the coupling rectangular protruding blocks (21), an X-direction trapezoidal limiting groove (13) is formed in the middle of the side wall of at least one side of the groove body of the coupling rectangular groove (11) of the pressing arm limiting block (1), X-direction trapezoidal limiting protruding blocks (23) are arranged in the corresponding position of the connecting plate limiting block (2) in a matched mode, and the X-direction trapezoidal limiting groove (13) and the X-direction trapezoidal limiting protruding blocks (23) can be buckled in a matched mode.
  3. 3. The welding fixture limiting structure according to claim 2 is characterized in that X-direction trapezoidal limiting grooves (13) are formed in the middle of the side walls of two sides of the coupling rectangular groove (11) of the pressing arm limiting block (1), and X-direction trapezoidal limiting protruding blocks (23) are arranged at corresponding positions of the connecting plate limiting block (2) in a matching mode.
  4. 4. The welding fixture limiting structure according to claim 3, wherein the front side wall of the connecting plate limiting block (2) is provided with an internal thread blind hole (24), the position, corresponding to the internal thread blind hole (24), of the upper end side wall of the connecting plate limiting block adjusting block (3) is provided with an adjusting bolt step hole (31), and an adjusting bolt (32) penetrates through the adjusting bolt step hole (31) to be connected into the internal thread blind hole (24) in a threaded mode to form X-direction adjustable displacement connection.
  5. 5. The welding fixture limiting structure according to claim 2, wherein the middle parts of the coupling surfaces of the coupling rectangular grooves (11) and the coupling rectangular protrusions (21) are provided with inverted trapezoidal protrusions and inverted trapezoidal grooves which are buckled with each other in a matching mode, the inverted trapezoidal protrusions are arranged in the middle parts of the coupling rectangular grooves (11) in a protruding mode, and the inverted trapezoidal grooves are arranged in the middle parts of the coupling rectangular protrusions (21) in a matching mode.
  6. 6. The welding fixture limiting structure according to claim 4 or 5, wherein the upper end face of the rectangular coupling lug (21) and the left and right vertical side walls are in arc transition.
  7. 7. The welding fixture limiting structure according to claim 6, wherein the upper end face of the pressing arm limiting block (1) and the lower end face of the connecting plate limiting block (2) are respectively provided with a pressing arm embedded groove (14) and a connecting plate embedded groove (25) corresponding to the coupling rectangular groove (11).
  8. 8. The welding fixture limiting structure according to claim 7, wherein the connecting plate limiting block (3) further comprises at least one adjusting gasket (33), and the adjusting gasket (33) is contacted with the lower part of the inner side wall of the connecting plate limiting block (3) and is fixed with the connecting plate through screws penetrating through the connecting plate limiting block (3) and the adjusting gasket (33).
  9. 9. A limit structure of a welding fixture is characterized in that a quadrangular sliding block (26) is horizontally arranged on the front side wall of a connecting plate limit block (2) in a protruding mode, two rows of inserting holes (27) are arranged in parallel in the length direction of the left side wall, the upper end face and the right side wall of the quadrangular sliding block (26), the positions of the two rows of inserting holes (27) on each face are correspondingly and equidistantly arranged, the inserting holes (27) on the left side wall, the upper end face and the right side wall are sequentially staggered from back to front, sliding sleeve square holes (34) are formed in the position, corresponding to the quadrangular sliding block (26), of the upper end wall of the connecting plate limit block (3), the quadrangular sliding block (26) can be in sliding sleeve connection in the sliding sleeve square holes (34) in a mode of adjustable displacement in the X direction, three pairs of inserting holes (35) are formed in a matched mode, and a pair of pins can be inserted into a pair of inserting holes (27) which are in a matched position.
  10. 10. A welding fixture is characterized by comprising a welding fixture limiting structure according to any one of claims 1-9, and further comprising a connecting base (4), a connecting plate (5), an air cylinder (6), a hinge plate (7), a pressing arm (8) and a positioning pin (9), wherein the upper end of the connecting base (4) is fixedly connected with the left lower end of the connecting plate (5), the air cylinder (6) is rotationally connected to the right lower end of the connecting plate (5), the front end of a telescopic arm of the air cylinder (6) is rotationally connected to the tail end of the pressing arm (8), the hinge plate (7) is vertically fixedly connected to the pressing arm (8) close to the tail end of the pressing arm (8), the lower end of the hinge plate (7) is connected to the right upper end of the connecting plate (5), the pressing arm (8) can be linked with the air cylinder (6) and is matched and opened and closed in a matched mode by the hinge plate (7) by taking the hinge shaft of the connecting plate (5) as a circle center, the positioning pin (9) is fixed on the side wall of the front part of the pressing arm (8), the limiting block (2) is embedded in the upper end face of the connecting plate (5) and is fixed on the front side wall of the upper end face of the connecting plate (5) through a bolt (3), the connecting plate limiting block (2) is connected with the counterpoint connecting plate limiting block adjusting block (3) in the X-direction adjustable displacement mode, the lower end face of the pressing arm limiting block (1) is matched with the upper end face of the connecting plate limiting block (2) for limiting coupling, and the upper end face of the pressing arm limiting block (1) is embedded in the lower end face of the counterpoint pressing arm (8) and is fixed with the pressing arm (8) through bolts in a threaded mode.

Description

Welding jig limit structure and welding jig Technical Field The invention relates to the technical field of automobile manufacturing, in particular to a welding fixture limiting structure and a welding fixture. Background The primary function of the welding fixture is to ensure the stability and positioning accuracy of the welded parts in the welding process, avoid welding defects caused by movement or dislocation of the weldment, ensure the relative position accuracy of the parts and ensure the welding quality of the parts, and is an important tool in the production process of automobile welding and loading. Referring to fig. 1, the welding fixture is generally composed of a ground angle 1', a base2', a supporting and clamping unit 3 'and a control unit, wherein the clamping and supporting unit is used for positioning, clamping and fixing parts and is composed of a connecting base 31', an air cylinder 32', a pressing arm 33', a positioning pin 34', a positioning surface 35', a limiting block 36 'and a hinge connecting plate 37', the limiting block structure is a common H-shaped limiting block combined structure or a V-shaped limiting block combined structure or a cylindrical limiting block combined structure, the limiting block determines the position precision of the pressing arm so as to influence the forming precision of the welded parts, the cylindrical limiting block is usually matched with a double-guide-rod air cylinder to be used, and the H-shaped limiting block and the V-shaped limiting block are usually used for a pressing arm overturning structure. Because the clamping support unit is repeatedly rotated to open and close, the hinge connecting plate is seriously worn, the positioning accuracy of the pressing arm is reduced, the positioning pin bears larger pulling force or the pin shaft part is worn after the pressing arm overturning structure is used for a long time, the positioning accuracy is lost, and the welding is deviated. Disclosure of Invention In order to solve the problems, the invention provides a welding fixture limiting structure and a welding fixture, which can finely adjust a positioning structure according to the abrasion condition of a hinge connecting plate, so that a positioning pin is always at an original position, positioning accuracy is ensured, abrasion at the hinge connecting position is relieved, and the positioning deviation is reduced, so that the positioning pin bears larger tension or positioning accuracy loss. The invention provides a limiting structure of a welding fixture, which comprises a pressing arm limiting block, a connecting plate limiting block and a connecting plate limiting block adjusting block; The lower end surface of the pressing arm limiting block and the upper end surface of the connecting plate limiting block can be mutually coupled in the Y direction (the Y direction is the width direction of the pressing arm limiting block) by a concave-convex groove structure, the concave-convex groove structure is coupled for limiting the pressing arm fixed above the pressing arm limiting block and the connecting plate fixed at the lower end of the connecting plate limiting block in the Y direction, the middle parts of the coupling surfaces of the pressing arm limiting block and the connecting plate limiting block in the length direction can be mutually in the X direction (the X direction is the length direction of the pressing arm limiting block), and concave-convex matched body-shaped convex parts and body-shaped grooves can be mutually arranged in the middle parts of the coupling surfaces of the pressing arm limiting block and the connecting plate limiting block in the X direction so as to limit the pressing arm limiting block and the connecting plate limiting block in the X direction; The front side wall of the connecting plate limiting block is connected with the upper end of one side wall of the aligned connecting plate limiting block adjusting block in an X-direction adjustable displacement mode; the design aims to solve the problems that after a hinge plate and a hinge shaft between a connecting plate and a pressing arm are repeatedly rotated and worn, the pressing arm can be caused to deviate forwards or backwards in the X direction, at the moment, a positioning pin can generate displacement relative to a limiting block adjusting block of the connecting plate in the X direction, the positioning accuracy of the positioning pin is inaccurate, the positioning pin bears larger pulling force when being in contact with a positioning part of a workpiece to be positioned, the workpiece to be positioned is positioned inaccurately, the subsequent workpiece welding is deviated, at the moment, the fixed position between the limiting block adjusting block of the connecting plate and the front end face of the connecting plate is kept unchanged, the positioning pin on the pressing arm is adjusted to the initial distance between the limiting block of the connecting