Frame assembly installing and welding clamp

Abstract

The utility model discloses a frame assembly assembling and welding clamp, and belongs to the technical field of rail transit vehicle part assembling and welding tools. The fixture is provided with a fixture body, a plurality of supports are circumferentially distributed on the outer wall of the fixture body, and positioning blocks and cushion blocks matched with the lower surface of a workpiece are laid on the upper surface of the fixture body at intervals; the stand column is fixedly connected with the support, the top end of the stand column is in spiral transmission connection with a pressing rod pressing a workpiece from the upper portion, the pressing rod makes contact with the workpiece through a pressing block, and the lower surface of the pressing block is matched with the upper surface of the workpiece; the cantilevers are fixedly connected to the inner wall of the clamp body in the circumferential direction, and the cantilevers are connected with ejector rods in a spiral transmission mode and used for tightly ejecting the workpieces to the baffles of the positioning blocks in the horizontal direction; according to the welding fixture, one-time positioning and clamping are achieved, welding of a workpiece in the forward direction and the reverse direction is completed, the high-quality-grade welding seam welding requirement is met, and the welding fixture has the advantages that the post-welding adjusting and repairing time is shortened, the product quality is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly welding tooling for rail transit vehicle components, in particular to an assembly welding fixture for frame components. Background Art

[0002] The EMU frame is a frame structure with a large volume. It is made of alloy profiles and then welded together. Figure 1 As shown, the frame mainly includes two 2.1728-meter-long longitudinal beams and two 1.6728-meter-long transverse beams. The cross-sections of the transverse beams and the longitudinal beams are special-shaped cross-sections. The upper and lower surfaces of the transverse beams and the longitudinal beams are non-planar structures. The transverse beams and the longitudinal beams are thinner in the thickness direction, that is, they are flat.

[0003] The welding method used in the frame assembly of the prior art is to make two sets of positive and negative pressure blocks, position the crossbeam and longitudinal beam platforms, assemble and weld them in the positive direction, cool them to room temperature after welding, reposition and clamp them, and place them on the reverse pressure blocks to weld the reverse welds. The disadvantages are that the cost of the fixture is high, and two positioning and clamping methods are required during the welding process on the platform. The clamping is time-consuming, the work efficiency is low, the welding deformation is large, the dimensions and flatness cannot be guaranteed, and the accessibility of the vertical welds is poor. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a frame assembly welding fixture, which is suitable for tungsten inert gas arc welding of EMU frame assembly, and can directly and automatically position to meet the high-quality grade weld welding requirements. The fixture can be connected to a positioner and can be turned 360 degrees with the help of the positioner. After welding the front weld, the tooling can be turned 180 degrees, and the welding operator performs back weld welding, which reduces the clamping time and effectively improves the production efficiency. All welds can be welded by adjusting the tooling to the PA\PB\PF position to ensure stable weld quality. It can also ensure the size and flatness of the profile after welding, ensure the quality after installation on the roof, and ensure the installation quality of the high-voltage box on the frame assembly.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The frame assembly welding fixture disclosed in the utility model comprises:

[0007] A clamp body, the outer wall of which has a plurality of supports arranged circumferentially, and the upper surface of the clamp body is provided with positioning blocks and cushion blocks adapted to the lower surface of the workpiece at intervals;

[0008] A column, which is fixedly connected to the support, a pressure rod for pressing the workpiece from above is spirally connected to the top of the column, the pressure rod contacts the workpiece through a pressure block, and the lower surface of the pressure block is adapted to the upper surface of the workpiece;

[0009] A plurality of cantilevers, the inner wall of the clamp body is circumferentially fixed with the cantilevers, and the cantilevers are spirally connected with a push rod for tightening the workpiece against the baffle of the positioning block from a horizontal direction;

[0010] A connecting seat is fixedly connected to both ends of the clamp body and is used for connecting with a positioner.

[0011] Furthermore, the positioning block and the cushion block are both detachably connected to the clamp body.

[0012] Furthermore, the upper surfaces of the positioning blocks and the cushion blocks located on both sides of the length direction of the clamp body are provided with limiting grooves, which are adapted to the lower surface of the workpiece beam through the limiting grooves.

[0013] Furthermore, the baffle is formed on one side of the positioning block, and the positioning block is provided with a mounting hole.

[0014] Furthermore, a protrusion is formed on the lower surface of the pressing block, and the protrusion is adapted to the upper surface of the workpiece longitudinal beam and the workpiece cross beam.

[0015] Furthermore, the column also includes a pressure arm, the top end of the column is rotatably connected to the pressure arm via a vertical axis, and the end of the pressure arm is spirally driven with the pressure rod.

[0016] Furthermore, the clamp body is provided with an avoidance area corresponding to the weld position of the workpiece, so that the welding position of the workpiece is exposed outside the clamp body.

[0017] Furthermore, the clamp body is a rectangular parallelepiped frame structure, in the middle of which a cross-shaped support beam is fixedly connected.

[0018] Furthermore, notches are formed at the four corners of the clamp body, and the notches are the avoidance areas.

[0019] Furthermore, the connecting seat is fixedly connected to a connecting beam, and the connecting beam is fixedly connected to the column.

[0020] In the above technical solution, the frame assembly welding fixture provided by the utility model has the following beneficial effects:

[0021] The improved frame assembly welding fixture of the present invention comprises: firstly, a plurality of columns are fixedly connected to the outer wall of the clamp body, a pressure rod is connected to the top of the column by spiral transmission, the pressure rod contacts the workpiece through a pressure block, the lower surface of the pressure block is adapted to the upper surface of the workpiece through a convex block, and the upper surface of the clamp body is provided with positioning blocks and cushion blocks adapted to the lower surface of the workpiece at intervals; the position of the positioning block corresponds to the pressure block, the workpiece can be directly and automatically positioned by the positioning block and the pressure block, and when the pressure rod provides a vertical clamping force, the pressure block and the positioning block clamp the workpiece in a vertical direction, so as to suppress the workpiece from being deformed downwardly by being concave or upwardly by being convex in the plumb bob direction;

[0022] Secondly, a plurality of cantilevers are fixedly connected to the inner wall of the clamp body, and the cantilevers are spirally connected to the push rods. A baffle is formed on the side of the positioning block away from the push rods. When the push rods press against the inner wall of the workpiece from the side, the baffles and the push rods clamp the workpiece in the horizontal direction, thereby preventing the workpiece from being deformed by sinking inward or bulging outward in the horizontal direction.

[0023] In addition, both ends of the clamp body in the length direction are fixedly connected with a connecting seat, which is connected to the positioner through a connecting plate, realizing one-time positioning and clamping, completing welding in both the forward and reverse directions of the workpiece, reducing post-welding adjustment time, improving product quality, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A schematic diagram of the structure of a workpiece in the prior art;

[0026] Figure 2 It is an axonometric diagram of the frame assembly welding fixture disclosed in the utility model;

[0027] Figure 3 It is a front view of the frame assembly welding fixture disclosed in the utility model;

[0028] Figure 4 It is a top view of the frame assembly welding fixture disclosed in the utility model;

[0029] Figure 5 It is an axonometric view of the frame assembly welding fixture disclosed in the utility model after the workpiece is removed;

[0030] Figure 6 It is an enlarged view of the A position of the frame assembly welding fixture disclosed in the utility model after the workpiece is removed;

[0031] Figure 7 It is an enlarged view of the B position of the frame assembly welding fixture disclosed in the utility model after the workpiece is removed;

[0032] Figure 8 It is a top view of the frame assembly welding fixture disclosed by the utility model after the workpiece is removed.

[0033] Description of reference numerals:

[0034] 10. Clamp body; 11. Support; 12. Positioning block; 13. Baffle; 14. Pad; 15. Limiting groove; 16. Support beam; 17. Avoidance area;

[0035] 20. column; 21. pressure arm; 22. pressure rod; 23. pressure block; 24. protrusion;

[0036] 30. Cantilever; 31. Mandrel;

[0037] 40. Connecting seat; 41. Connecting plate; 42. Connecting beam;

[0038] 100. Workpiece longitudinal beam;

[0039] 200. Workpiece beam. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] See also Figure 2-8 As shown;

[0042] The utility model frame assembly welding fixture comprises:

[0043] A clamp body 10 has a plurality of supports 11 arranged circumferentially on its outer wall, and a positioning block 12 and a cushion block 14 adapted to the lower surface of the workpiece are laid at intervals on the upper surface of the clamp body 10;

[0044] A column 20 is fixedly connected to the support 11. A pressure rod 22 for pressing the workpiece from above is spirally connected to the top of the column 20. The pressure rod 22 contacts the workpiece through a pressure block 23. The lower surface of the pressure block 23 is adapted to the upper surface of the workpiece.

[0045] A plurality of cantilevers 30 are fixedly connected to the inner wall of the clamp body 10 in the circumferential direction, and the cantilevers 30 are screw-drivenly connected to the push rods 31 for tightening the workpiece on the baffle 13 of the positioning block 12 from the horizontal direction;

[0046] The connecting seat 40 is fixedly connected to both ends of the clamp body 10 and is used for connecting with the positioner.

[0047] For details, see Figure 2 , 5 -7, the workpiece in the structure is a frame for a train set, and the frame has two workpiece longitudinal beams 100 and two workpiece cross beams 200;

[0048] The clamp body 10 is used to carry the workpiece. The outer wall of the clamp body 10 is fixedly connected with a plurality of columns 20 through a support 11. The top of the column 20 is spirally connected with a pressure rod 22. The pressure rod 22 contacts the workpiece through a pressure block 23. The lower surface of the pressure block 23 is adapted to the upper surface of the workpiece. The upper surface of the clamp body 10 is paved with positioning blocks 12 and cushion blocks 14 adapted to the lower surface of the workpiece at intervals; the position of the positioning block 12 corresponds to the pressure block 23, and a cushion block 14 is paved between the two positioning blocks 12. When the pressure rod 22 provides a vertical clamping force, the pressure block 23 and the positioning block 12 clamp the workpiece in the vertical direction to prevent the workpiece from being deformed downwardly or convexly upwardly in the vertical direction.

[0049] A plurality of cantilevers 30 are fixedly connected to the inner wall of the clamp body 10. The cantilever 30 is constructed in an L-shaped structure. A push rod 31 is connected to the top of the cantilever 30 by a spiral transmission. A baffle 13 is formed on the side of the positioning block 12 away from the push rod 31. When the push rod 31 presses against the inner wall of the workpiece from the side, the baffle 13 and the push rod 31 clamp the workpiece in the horizontal direction to prevent the workpiece from being deformed by being concave in the horizontal direction or convex outward.

[0050] Both ends of the clamp body 10 in the length direction are fixedly connected with a connecting seat 40, and the connecting seat 40 is connected to the positioner through a connecting plate 41, so as to realize one-time positioning and clamping, and complete welding of the workpiece in both the positive and negative directions;

[0051] See also Figure 6 , 7 As shown, preferably, the positioning block 12 and the cushion block 14 are both detachably connected to the clamp body 10. It is convenient to replace the positioning block 12 and the cushion block 14, and it is also convenient to interchange the position of the positioning block 12, thereby improving the versatility of the assembly welding fixture;

[0052] See also Figure 7 As shown, preferably, the upper surfaces of the positioning blocks 12 and the cushion blocks 14 located on both sides of the length direction of the clamp body 10 are provided with limiting grooves 15, which are adapted to the lower surface of the workpiece beam 200 through the limiting grooves 15.

[0053] See also Figure 6 , 7 As shown, preferably, a baffle 13 is formed on one side of the positioning block 12, and the positioning block 12 is provided with a mounting hole. Specifically, the mounting hole is a long hole, and the axis of the long hole is perpendicular to the baffle 13. During assembly, the position of the positioning block 12 is adjusted through the long hole to ensure the positioning accuracy of the positioning block 12;

[0054] See also Figure 6 , 7 As shown, preferably, a protrusion 24 is formed on the lower surface of the pressing block 23 , and the protrusion 24 is adapted to the upper surfaces of the workpiece longitudinal beam 100 and the workpiece cross beam 200 .

[0055] See also Figure 6 , 7As shown, preferably, the column 20 further includes a pressure arm 21 , the top end of the column 20 is rotatably connected to the pressure arm 21 via a vertical axis, and the end of the pressure arm 21 is spirally driven with a pressure rod 22 .

[0056] See also Figure 8 As shown, preferably, the clamp body 10 is formed with an avoidance area 17 corresponding to the workpiece weld position, so that the workpiece welding position is exposed outside the clamp body 10. This avoids interference between the clamp body 10 and the welding gun during welding;

[0057] See also Figure 8 As shown, preferably, the clamp body 10 is a frame structure of a rectangular parallelepiped structure. In order to improve the overall strength of the clamp body 10, a support beam 16 of a cross-shaped structure is fixedly connected to the middle thereof. The clamp body 10 and the support beam 16 are both directional steel pipes;

[0058] See also Figure 8 As shown, preferably, notches are formed at the four corners of the clamp body 10 , and the notches serve as avoidance areas 17 .

[0059] Specifically, the clamp body 10 is a rectangular parallelepiped frame structure formed by welding a plurality of square tubes. The four corners of the clamp body 10 are connected by two connecting square tubes to form an L-shaped side beam to connect the horizontal side beam and the longitudinal side beam of the clamp body 10, and then notches are formed at the four corners of the clamp body 10, that is, the avoidance area 17, to avoid the weld position of the workpiece, so as to ensure that the workpiece can be welded on both the front and back sides;

[0060] See also Figure 8 As shown, preferably, the connecting seat 40 is fixedly connected to a connecting beam 42 , and the connecting beam 42 is fixedly connected to the column 20 , and the workpiece beam 200 is pressed from the middle of the workpiece beam 200 by a pressing rod 22 on the column 20 .

[0061] In the above technical solution, the frame assembly welding fixture provided by the utility model has the following beneficial effects:

[0062] The clamp, firstly, has a plurality of columns fixedly connected to the outer wall of the clamp body, the top of the column is spirally connected to a pressure rod, the pressure rod contacts the workpiece through a pressure block, the lower surface of the pressure block is adapted to the upper surface of the workpiece through a convex block, and the upper surface of the clamp body is paved with positioning blocks and cushion blocks adapted to the lower surface of the workpiece at intervals; the position of the positioning block corresponds to the pressure block, the workpiece can be directly and automatically positioned by the positioning block and the pressure block, and when the pressure rod provides a vertical clamping force, the pressure block and the positioning block clamp the workpiece in a vertical direction, so as to suppress the workpiece from being deformed downwardly by sinking or upwardly by convexing in the plumb bob direction;

[0063] Secondly, a plurality of cantilevers are fixedly connected to the inner wall of the clamp body, and the cantilevers are spirally connected to the push rods. A baffle is formed on the side of the positioning block away from the push rods. When the push rods press against the inner wall of the workpiece from the side, the baffles and the push rods clamp the workpiece in the horizontal direction, thereby preventing the workpiece from being deformed by sinking inward or bulging outward in the horizontal direction.

[0064] In addition, both ends of the clamp body in the length direction are fixedly connected with a connecting seat, which is connected to the positioner through a connecting plate to achieve one-time positioning and clamping, completing welding in both the forward and reverse directions of the workpiece, reducing post-welding adjustment time, improving product quality, and reducing production costs.

[0065] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. The frame assembly welding fixture is characterized by: include: A clamp body (10) having a plurality of supports (11) arranged circumferentially on its outer wall, and a positioning block (12) and a cushion block (14) adapted to the lower surface of the workpiece are laid at intervals on the upper surface of the clamp body (10); A column (20) is fixedly connected to the support (11), and a pressure rod (22) is spirally connected to the top of the column (20) for pressing the workpiece from above, and the pressure rod (22) contacts the workpiece through a pressure block (23), and the lower surface of the pressure block (23) is adapted to the upper surface of the workpiece; A plurality of cantilevers (30), the cantilevers (30) being fixedly connected to the inner wall of the clamp body (10) in the circumferential direction, and the cantilevers (30) being screw-drivenly connected to a push rod (31) for pushing the workpiece against the baffle (13) of the positioning block (12) in the horizontal direction; A connecting seat (40) is fixedly connected to both ends of the clamp body (10) and is used for connecting to a positioner.

2. The frame assembly welding fixture according to claim 1 is characterized in that ； The positioning block (12) and the cushion block (14) are both detachably connected to the clamp body (10).

3. The frame assembly welding fixture according to claim 1 or 2, characterized in that ； The upper surfaces of the positioning blocks (12) and the cushion blocks (14) located on both sides of the clamp body (10) in the length direction are provided with limiting grooves (15), which are adapted to the lower surface of the workpiece crossbeam (200) through the limiting grooves (15).

4. The frame assembly welding fixture according to claim 2 is characterized in that ； The baffle (13) is formed on one side of the positioning block (12), and the positioning block (12) is provided with a mounting hole.

5. The frame assembly welding fixture according to claim 1 is characterized in that ； A bulge (24) is formed on the lower surface of the pressing block (23), and the bulge (24) is adapted to the upper surfaces of the workpiece longitudinal beam (100) and the workpiece cross beam (200).

6. The frame assembly welding fixture according to claim 1, characterized in that; The column (20) further comprises a pressure arm (21), the top end of the column (20) is rotatably connected to the pressure arm (21) via a vertical axis, and the bottom end of the pressure arm (21) is spirally driven with the pressure rod (22).

7. The frame assembly welding fixture according to claim 1, characterized in that: The clamp body (10) is provided with an avoidance area (17) corresponding to the position of the workpiece welding seam, so that the workpiece welding position is exposed outside the clamp body (10).

8. The frame assembly welding fixture according to claim 7, characterized in that; The clamp body (10) is a rectangular parallelepiped frame structure, wherein a cross-shaped support beam (16) is fixedly connected to the middle thereof.

9. The frame assembly welding fixture according to claim 8, characterized in that: Notches are formed at the four corners of the clamp body (10), and the notches serve as the avoidance areas (17).

10. The frame assembly welding fixture according to claim 1, characterized in that ； The connection seat (40) is fixedly connected to a connection beam (42), and the connection beam (42) is fixedly connected to the column (20).

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