Front auxiliary frame welding clamp

Abstract

The utility model discloses a front subframe welding fixture which comprises a clamping plate, cross beam positioning blocks, longitudinal beam positioning blocks, a pneumatic clamping jaw, a swing arm positioning mechanism and a sleeve positioning shaft, a plurality of longitudinal beam positioning blocks are symmetrically arranged on the two sides of the end face of the clamping plate, and a plurality of cross beam positioning blocks are arranged in the middle of the end face of the clamping plate in parallel. The pneumatic clamping jaw is arranged on one side of the longitudinal beam positioning block and one side of the cross beam positioning block, the pneumatic clamping jaw is used for stroking longitudinal beams on the two sides and clamping and positioning front and rear cross beams, movable swing arm positioning mechanisms are symmetrically arranged on the outermost side of the end face of the clamping plate, and the sleeve positioning shafts are vertically fixed to the end face of the clamping plate corresponding to the two ends of the longitudinal beams. The original welding mode that stations need to be switched is combined, so that when longitudinal beams on the two sides, a front cross beam, a rear cross beam, a lining pipe and a swing arm connecting piece are welded, the stations do not need to be switched again; after the longitudinal beams on the two sides are welded with the front cross beam and the rear cross beam, a lining pipe and a swing arm connecting piece need to be connected after a welding seam is cooled, and therefore deformation errors generated by welding are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding jigs, in particular to a front subframe welding jig. Background Art

[0002] As a support structure of the front axle of an automobile, the front subframe is usually used to connect the suspension and the frame. The existing front subframe is welded by two side longitudinal beams, front and rear cross beams, bushing sleeves and swing arm connectors. During the welding forming process, in order to reduce the thermal deformation error generated by simultaneous welding, the two side longitudinal beams and the front and rear cross beams are first welded and formed, and then shifted to another jig to weld the bushing sleeves and swing arm connectors. The entire welding process requires switching the working position once, which reduces the welding efficiency of the entire front subframe. Therefore, in order to solve the above problems, a front subframe welding jig is designed. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing welding jigs, the purpose of the utility model is to provide a front subframe welding jig, which has the advantages of high-efficiency welding, reducing deformation error, etc.

[0004] To achieve the above purpose, a technical solution adopted by the utility model is: a front subframe welding jig, including a mounting plate, cross beam positioning blocks, longitudinal beam positioning blocks, pneumatic grippers, swing arm positioning mechanisms and bushing positioning shafts. A plurality of longitudinal beam positioning blocks are symmetrically arranged on both sides of the end face of the mounting plate, and a plurality of parallel cross beam positioning blocks are arranged in the middle of the end face of the mounting plate. The pneumatic grippers are arranged on one side of the longitudinal beam positioning blocks and the cross beam positioning blocks, and the pneumatic grippers are used to clamp and position the two side longitudinal beams and the front and rear cross beams. Movable swing arm positioning mechanisms are symmetrically arranged on the outermost sides of the end face of the mounting plate, and the bushing positioning shafts are vertically fixed on the end face of the mounting plate corresponding to both ends of the longitudinal beams;

[0005] Preferably, the end face of the cross beam positioning block has a groove for embedding the cross beam of the front subframe, and the cross beam positioning block horizontally positions the front and rear cross beams;

[0006] Preferably, the end face of the longitudinal beam positioning block has a groove for embedding the longitudinal beam of the front subframe, and the longitudinal beam positioning block symmetrically positions the two side longitudinal beams;

[0007] Preferably, the swing arm positioning mechanism includes a reference rod, a horizontal rod, an inclined rod, a spring and a hydraulic rod. The reference rod is slidably connected to the end face of the mounting plate, and the sliding path of the reference rod is perpendicular to the longitudinal beam. The horizontal rod is vertically arranged on one side of the reference rod, the inclined rod is slidably connected to the other side of the reference rod in an inclined state, the spring forces the inclined rod to move to the outside of the reference rod, the hydraulic rod is arranged on the end face of the mounting plate, and the telescopic end of the hydraulic rod is fixedly connected to the reference rod. The hydraulic rod is used to drive the horizontal rod and the inclined rod to approach the longitudinal beam;

[0008] Further preferably, elastic sheets for fixing the swing arm connecting member are provided at the outer ends of the horizontal rod and the inclined rod;

[0009] The beneficial effects of the present utility model are as follows: 1. By combining the original welding method that requires switching workstations, when welding the longitudinal beams on both sides, the front and rear cross beams, the bushing and the swing arm connecting member, it is no longer necessary to switch workstations again, thereby achieving the purpose of improving welding efficiency; 2. After the longitudinal beams on both sides and the front and rear cross beams are welded, it is necessary to wait for the welds to cool before welding the bushing and the swing arm connecting member, so as to reduce the deformation error generated by simultaneous welding. Description of the Drawings

[0010] Figure 1 is a structural view of the initial state of the present utility model;

[0011] Figure 2 is a structural view of the present utility model in the state of completing loading;

[0012] Figure 3 is a structural view of the welding state of the present utility model Figure 2

[0013] Figure 4 is the present utility model Figure 1 is a partial enlarged view of area I in the present utility model. Detailed Embodiment

[0014] The following elaborates on the preferred embodiments of the present utility model in conjunction with the drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the scope of protection of the present utility model more clearly defined.

[0015] It should be noted that in the description of the present utility model, the terms indicating the direction or position relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or position relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0016] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "provided with", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0017] Please refer to Figures 1 to 4 , the embodiments of the present utility model include:

[0018] A front subframe welding fixture, comprising a mounting plate 1, a crossbeam positioning block 2, a longitudinal beam positioning block 3, a pneumatic gripper 4, a swing arm positioning mechanism 5 and a sleeve positioning shaft 6. On both sides of the end face of the mounting plate 1, a plurality of longitudinal beam positioning blocks 3 are symmetrically arranged. In the middle of the end face of the mounting plate 1, a plurality of parallel crossbeam positioning blocks 2 are arranged. The pneumatic gripper 4 is arranged on one side of the longitudinal beam positioning block 3 and the crossbeam positioning block 2. The pneumatic gripper 4 is used to clamp and position the longitudinal beams on both sides and the front and rear crossbeams. On the outermost sides of the end face of the mounting plate 1, movable swing arm positioning mechanisms 5 are symmetrically arranged. The sleeve positioning shaft 6 is vertically fixed to the end face of the mounting plate 1 corresponding to both ends of the longitudinal beam;

[0019] The end face of the crossbeam positioning block 2 has a groove for embedding the front subframe crossbeam, and the crossbeam positioning block 2 horizontally positions the front and rear crossbeams;

[0020] The end face of the longitudinal beam positioning block 3 has a groove for embedding the front subframe longitudinal beam, and the longitudinal beam positioning block 3 symmetrically positions the longitudinal beams on both sides;

[0021] The swing arm positioning mechanism 5 includes a reference rod 51, a horizontal rod 52, an inclined rod 53, a spring 54 and a hydraulic rod 55. The reference rod 51 is slidably connected to the end face of the mounting plate 1, and the sliding path of the reference rod 51 is perpendicular to the longitudinal beam. The horizontal rod 52 is vertically arranged on one side of the reference rod 51. The inclined rod 53 is slidably connected to the other side of the reference rod 51 in an inclined state. The spring 54 forces the inclined rod 53 to move to the outside of the reference rod 51. The hydraulic rod 55 is arranged on the end face of the mounting plate 1, and the telescopic end of the hydraulic rod 55 is fixedly connected to the reference rod 51. The hydraulic rod 55 is used to drive the horizontal rod 52 and the inclined rod 53 to approach the longitudinal beam;

[0022] Both the outer ends of the horizontal rod 52 and the inclined rod 53 have elastic pieces 7 for fixing the swing arm connecting piece;

[0023] With the above settings, in the actual working process, its specific working principle is as follows:

[0024] Loading: First, sleeved the lining sleeve on the sleeve positioning shaft 6. Then, place the longitudinal beams on both sides on the corresponding longitudinal beam positioning blocks 3, and embed the longitudinal beams into the grooves on the end faces of the longitudinal beam positioning blocks 3 for positioning. At this time, the lining sleeves at both ends of the longitudinal beams can also provide auxiliary positioning. Then, place the front and rear crossbeams on the corresponding crossbeam positioning blocks 2, and embed the crossbeams into the grooves on the end faces of the crossbeam positioning blocks 2 for positioning. At this time, start the gripper to clamp and position the longitudinal beams on both sides and the front and rear crossbeams. Finally, sleeved the swing arm connecting piece on the outer ends of the horizontal rod 52 and the inclined rod 53, and the horizontal rod 52 and the inclined rod 53 position the swing arm connecting piece through the elastic pieces 7;

[0025] Welding: First, weld the longitudinal beams on both sides and the front and rear cross beams in the clamped and fixed state. During the welding process, since the swing arm connecting piece has not been placed at the welding position, the welding process will not be interfered. After the longitudinal beams on both sides and the front and rear cross beams are welded, start the hydraulic rods 55 on both sides to extend while waiting for the weld seam to cool. The hydraulic rods 55 drive the horizontal rod 52 and the inclined rod 53 to approach the longitudinal beam, thereby moving the swing arm connecting piece to the welding position. When the weld seam is completely cooled, weld the swing arm connecting piece and the bushing on the longitudinal beams on both sides;

[0026] Material cutting: First, start the hydraulic rods 55 on both sides to contract. The hydraulic rods 55 drive the reference rod 51, the horizontal rod 52, and the inclined rod 53 to move to the initial state at the same time. Since the swing arm connecting piece fixed to the outer end of the inclined rod 53 is welded obliquely, the inclined rod 53 will compress the spring 54 during the movement, so that it can be withdrawn from the inclined swing arm connecting piece. After the hydraulic rods 55 drive the reference rod 51, the horizontal rod 52, and the inclined rod 53 to move to the initial state, start the jaws to loosen and stop positioning the longitudinal beams on both sides and the front and rear cross beams. At this time, the welded front subframe can be removed from the fixture along the sleeve positioning shaft 6 axially;

[0027] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A front subframe welding fixture, characterized in that: It includes a clamping plate, a crossbeam positioning block, a longitudinal beam positioning block, a pneumatic clamp, a swing arm positioning mechanism and a sleeve positioning shaft. A plurality of longitudinal beam positioning blocks are symmetrically arranged on both sides of the end face of the clamping plate, and a plurality of crossbeam positioning blocks arranged in parallel are arranged in the middle of the end face of the clamping plate. The pneumatic clamp is arranged on one side of the longitudinal beam positioning block and the crossbeam positioning block. The pneumatic clamp is used to clamp and position the longitudinal beams on both sides and the front and rear cross beams. A movable swing arm positioning mechanism is symmetrically arranged on the outermost side of the end face of the clamping plate, and the sleeve positioning shaft is vertically fixed to the end face of the clamping plate corresponding to the two ends of the longitudinal beam.

2. A front subframe welding fixture according to claim 1, characterized in that: The end surface of the cross beam positioning block has a groove for embedding the front sub-frame cross beam, and the cross beam positioning block positions the front and rear cross beams horizontally.

3. The front subframe welding fixture according to claim 1, characterized in that: The end surface of the longitudinal beam positioning block has a groove for embedding the longitudinal beam of the front sub-frame, and the longitudinal beam positioning block symmetrically positions the longitudinal beams on both sides.

4. The front subframe welding fixture according to claim 1, characterized in that: The swing arm positioning mechanism includes a reference rod, a horizontal rod, a tilt rod, a spring and a hydraulic rod. The reference rod is slidably connected to the end face of the clamping plate, and the sliding path of the reference rod is perpendicular to the longitudinal beam. The horizontal rod is vertically arranged on one side of the reference rod, and the tilt rod is slidably connected to the other side of the reference rod in an inclined state. The spring forces the tilt rod to move to the outside of the reference rod. The hydraulic rod is arranged on the end face of the clamping plate, and the telescopic end of the hydraulic rod is fixedly connected to the reference rod. The hydraulic rod is used to drive the horizontal rod and the tilt rod to approach the longitudinal beam.

5. The front subframe welding fixture according to claim 4, characterized in that: The outer ends of the horizontal rod and the inclined rod are both provided with elastic sheets for fixing the swing arm connecting piece.

Images