CN202240319U - A combination fixture for bolster welding of low-floor vehicles - Google Patents

Abstract

The utility model provides a bolster welding assembly clamp for a low-floor vehicle, which comprises a bottom plate, a middle positioning device, a middle clamping device, a support frame, left and right clamping devices, left and right positioning devices, and front and rear positioning devices. The utility model utilizes the positioning device and the clamping device on the bolster welding assembly clamp to quickly position and fix the bolster and the support plate to be welded, and then connects the bolster welding assembly clamp to an L-shaped positioner, and rotates the L-shaped positioner to change the overhead welding between the bolster and the support plate into a flat welding, thereby ensuring both the welding quality and the external dimensions.

Description

A combination fixture for bolster welding of low-floor vehicles

technical field

The utility model relates to a low-floor bolster welding combination fixture.

Background technique

The bolster of the low-floor vehicle is connected to the frame through the central hole designed under the bolster. The spring bracket above the bolster acts as a shock absorber to form a support for the car body. At the same time, when the vehicle is running, the bolster swings back and forth to change the vehicle The driving direction, which not only requires high appearance and size of the bolster, but also has a high fatigue resistance, so the welding deformation must be strictly controlled during welding, and the welding quality must be guaranteed. Not only must the magnetic particle inspection be qualified, but also the Ultrasonic flaw detection is qualified. Since the welding seam of the bolster has both flat welding and overhead welding, not only the bolster has to be raised for welding in the upward welding, but also it is difficult to guarantee the quality of the weld in the upward welding, which puts forward the design requirements of the welding combination fixture , and rotate at all positions on the L-type positioner to ensure that the welds of the bolster are all flat welded, so this welding combination fixture can not only fix the bolster to prevent welding deformation, ensure that the size after welding meets the requirements of the drawing, but also ensure welding quality.

Contents of the invention

The purpose of this utility model is to provide a bolster welding combination fixture for a low-floor vehicle that can ensure the quality of the weld seam and the overall size.

The technical scheme of the utility model is: it includes a base plate, a middle positioning device, a middle pressing device, a support frame, a left and right pressing device, a left and right positioning device, and a front and rear positioning device. The upper part of the positioning device is equipped with a middle pressing device, the left end of the upper surface of the bottom plate is provided with a support frame I, the right end is provided with a support frame II, the upper end of the support frame I is provided with a left and right positioning device I, and the upper end of the support frame II is provided. There is a left and right positioning device II, and a left and right pressing device I is arranged on the outside of the left and right positioning device I, and a left and right pressing device II is arranged outside the left and right positioning device II; on the bottom plate between the support frame I and the support frame II The front end of the surface is provided with front and rear positioning device III and front and rear positioning device IV, and the outer sides of front and rear positioning device III and front and rear positioning device IV are respectively provided with screws III and screw IV in the front and rear directions, and the bottom plate between support frame I and support frame II The rear end of the upper surface of the upper surface is symmetrically provided with front and rear positioning device I and front and rear positioning device II, and the outer sides of front and rear positioning device I and front and rear positioning device II in the front and rear direction are respectively provided with screw I and screw II.

The utility model has the effect of using the positioning device and the pressing device on the bolster welding combination fixture to quickly locate and fix the bolster and the support plate to be welded, and then connect the bolster welding combination fixture with the L-shaped positioner, and pass the L The type positioner rotates to change the upward welding between the bolster and the support plate into a flat welding, so that both the welding quality and the external dimension can be guaranteed. ``

Description of drawings

Fig. 1 is the schematic diagram of the workpiece to be welded of the utility model.

Fig. 2 is a structural schematic diagram of the utility model.

Fig. 3 is a sectional view along A-A of Fig. 2 .

Fig. 4 is the working schematic diagram of the utility model.

In the figure: 1. Bottom plate; 2. Central positioning device; 3. Central pressing device; 4. Support frame; 5. L-shaped positioner; 6. Left and right pressing device; 7. Left and right positioning device; 8. Front and rear positioning Device; 9. Bolster; 10. Support plate; 11. Screw; 12. Center hole.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Referring to accompanying drawing 1, Fig. 2, shown in Fig. 3 and Fig. 4, it comprises bottom plate 1, middle part positioning device 2, middle part pressing device 3, support frame 4, left and right pressing device 6, left and right positioning device 7, front and rear positioning device 8. The support frame 4 is divided into support frame Ⅰ4-1, support frame Ⅱ4-2, left and right pressing device 6 is divided into left and right pressing device Ⅰ6-1, left and right pressing device Ⅱ6-2, front and rear positioning device 8 Divided into front and rear positioning device Ⅰ8-1, front and rear positioning device Ⅱ8-2, front and rear positioning device Ⅲ8-3, front and rear positioning device Ⅳ8-4.

The center of the upper surface of the base plate 1 is provided with a middle positioning device 2, and the upper part of the middle positioning device 2 is provided with a middle pressing device 3. The left end of the upper surface of the base plate 1 is provided with a support frame I4-1, and the right end is provided with a support frame II4- 2. A left and right positioning device I7-1 is provided on the upper end of the support frame I4-1, a left and right positioning device II7-2 is provided on the upper end of the support frame II4-2, and a left and right pressing device is provided on the outside of the left and right positioning device I7-1 Device Ⅰ6-1, left and right pressing device Ⅱ6-2 is provided on the outside of left and right positioning device Ⅱ7-2; front and rear positioning devices are provided on the front end of the upper surface of the bottom plate 1 between support frame Ⅰ4-1 and support frame Ⅱ4-2 Device Ⅲ8-3 and front and rear positioning device Ⅳ8-4, the outer sides of front and rear positioning device Ⅲ8-3 and front and rear positioning device Ⅳ8-4 are respectively provided with screw Ⅲ11-3 and screw Ⅳ11-4, on the support frame Ⅰ4-1 and The rear end of the upper surface of the bottom plate 1 between the support frame II4-2 is symmetrically provided with the front and rear positioning device I8-1 and the front and rear positioning device II8-2, and the front and rear positioning device I8-1 and the front and rear positioning device II8-2 are located in the front and rear directions. There are screw I11-1 and screw II11-2 on the outside respectively.

During welding, the central hole 12 of the bolster 9 of the workpiece to be welded is inserted into the middle positioning device 2, and is pressed by the middle pressing device 3, and the front end of the bolster 9 of the workpiece to be welded is passed through by screw III 11-3 and screw IV 11-4 respectively. The front and rear positioning device Ⅲ8-3 and the front and rear positioning device Ⅳ8-4 press the bolster 9 backward, and the rear symmetrical screws Ⅰ11-1 and Ⅱ11-2 pass through the front and rear positioning device Ⅰ8-1 and the front and rear positioning device Ⅱ8-2 respectively. Tighten the bolster 9 at the front, so that the bolster 9 is fixed; the support plate 10 is divided into the support plate I10-1, the support plate II10-2, the support plate I10-1 is placed on the support frame I4-1, and the support plate Ⅱ10-2 is placed on the support frame Ⅱ4-2, and on the support frame Ⅰ4-1, the support plate Ⅰ10-1 is positioned by the left and right positioning device Ⅰ 7-1, and the support plate Ⅰ10-1 is fixed by the left and right pressing device Ⅰ6-1. 1 to compress; on the support frame Ⅱ4-2, position the supporting plate Ⅱ10-2 through the left and right positioning device Ⅱ 7-2, and use the left and right pressing device Ⅱ6-2 to compress the supporting plate Ⅱ10-2; Good support plate I10-1 and support plate II10-2; use gas shielded welding to spot weld the bolster 9 and support plate I10-1 and bolster 9 and support plate II10-2; spot weld the good bolster 9 and support The plate 10 is hoisted to the L-shaped positioner 5 together with the combined fixture, and fixed on the L-shaped positioner 5 through the bottom plate 1 . In this way, on the L-type positioner 5, after the welding positions of the upper plane of the bolster 9 and the support plate I10-1 and the upper plane of the bolster 9 and the support plate II10-2 are flat-welded, the L-type positioner 5 is rotated 180° Weld the lower plane welding positions of bolster 9 and support plate Ⅰ10-1 and bolster 9 and support plate II 10-2. Since the L-shaped positioner 5 rotates 180 degrees, the welding of the lower plane is changed from the original Overhead welding has changed to flat welding, thereby ensuring the quality of welding. In addition, the bolster 9 and support plate 10 are fixed by the bolster welding combination fixture to ensure the size after welding.

Claims (1)

1. A bolster welding combination fixture for a low-floor vehicle, comprising a base plate, a middle positioning device, a middle pressing device, a support frame, a left and right pressing device, a left and right positioning device, and a front and rear positioning device, wherein the base plate The center of the upper surface is equipped with a middle positioning device, and the upper part of the middle positioning device is equipped with a middle pressing device. The left end of the upper surface of the bottom plate is equipped with a support frame I, the right end is equipped with a support frame II, and the upper end of the support frame I is equipped with left and right positioning. Device Ⅰ, a left and right positioning device II is provided on the upper end of the support frame II, a left and right pressing device I is provided outside the left and right positioning device I, and a left and right pressing device II is provided outside the left and right positioning device II; Front and rear positioning devices III and front and rear positioning devices IV are provided on the front end of the upper surface of the bottom plate between the support frame II, and the front and rear positioning devices III and front and rear positioning devices IV are respectively provided with screws III and screws IV on the front and rear sides of the front and rear positioning devices. The rear end of the upper surface of the bottom plate (1) between I and support frame II is symmetrically provided with front and rear positioning devices I and front and rear positioning devices II, and the outer sides of front and rear positioning devices I and front and rear positioning devices II are respectively provided with screws I and screw II.

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