CN101774100B - Adjustable position welding device of space truss structure - Google Patents

Abstract

The invention discloses an adjustable position welding device of a space truss structure. The adjustable position welding device comprises a main body composed of a support platform, longitudinal slideways and transverse slideways, wherein the longitudinal and transverse slideways both adopt the I-shaped beam structure which is formed by welding an upper plate girder, a lower plate girder and a middle plate girder together, the lower plate girder of each transverse slideway is provided with at least two guide slots which are perpendicular to the transverse slideway and arranged symmetrically to the centre, the longitudinal slideways support the transverse slideways through the guide slots, two pressing plates arranged in the guide slots are separately clamped on the two sides of each longitudinal slideway, and the transverse slideways are locked with the pressing plates through fastening pieces to fasten and position the transverse slideways and the longitudinal slideways. The invention has stable structure, the stress surface of the slideways is large and the position of the device can not change when in use.

Description

Adjustable welding positioning device for grid structure

technical field

The invention relates to an adjustable welding positioning device of a grid structure.

Background technique

In order to reduce costs, our company designed the side frame of the 7200kw six-axle vehicle as a grid structure formed by welding rectangular steel pipes. The beams and longitudinal beams are made of rectangular steel pipes with dimensions of 120mm×80mm and wall thickness of 4mm. For the side structure design of this structure, it is necessary to divide the side structure frame into four small frames for assembly and welding, and then assemble and weld these small frames and other parts of the side structure into a side structure. In this way, it is necessary to provide a tooling for welding the beams and longitudinal beams into a small frame of the side structure. The tooling also needs to ensure the flatness of the small frame after welding, the distance between the longitudinal beams and the beams, and the diagonal The line error is within the allowable range of the design. In order to make the tool more versatile, it needs to be designed as an adjustable tool that can be used for welding and positioning of side frame frames of various types of vehicles.

The main body of the existing adjustable electric locomotive side structure welding positioning device is composed of a support platform, a transverse beam, and a guide rail and a slider arranged outside the support platform. It is fixed on the outside of the support platform, and the slider is fastened under the two ends of the transverse beam with screws. The position of the transverse beam is adjusted through the cooperation of the guide rail and the slider. When it is adjusted to a suitable position, the transverse beam and the support platform are locked by the set screw to realize the positioning of the transverse beam relative to the support platform.

The defect of the positioning device of this structure mainly contains:

1. The guide rail is small and bears a lot of force. The material used to manufacture the guide rail and slider is required to have high strength and high hardness, and the manufacturing precision of the guide rail and slider is required to be high.

2. Fasten with set screws. If the fastening force is too small, it will cause positioning changes during use and affect the positioning accuracy. If the fastening force is too large, it will cause deformation of guide rails, sliders or other parts of the positioning device , affecting the flatness of the skeleton welding.

Contents of the invention

The technical problem to be solved by the present invention is to provide an adjustable welding positioning device with a grid structure that has a stable structure, a large force-bearing area, and no positioning changes during use.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: an adjustable welding positioning device of a grid structure, which includes a main body composed of a support platform, a longitudinal guide rail, and a transverse guide rail. These longitudinal guide rails and transverse guide rails are all The I-beam structure welded by the upper and lower plate girders and the middle plate girder is characterized in that,

The lower plate beams of these transverse guide rails are provided with at least two guide grooves perpendicular to the transverse guide rails and symmetrical to the center. On both sides of the longitudinal guide rail, the transverse guide rail and the pressure plate are locked by fasteners, so that the transverse guide rail and the longitudinal guide rail are fastened and positioned.

In the above solution, the distance from the bottom surface of each guide groove to the upper plane of the upper plate beam of the transverse guide rail is equal, the tolerance range is ±0.1mm, and the tolerance range of the width of the guide groove is ±0.2mm.

In the above solution, the longitudinal guide rail and the transverse guide rail are provided with ribs, and the tolerance range of the width of the plate beams on the longitudinal guide rail and the transverse guide rail is -0.2 mm to 0 mm.

In the above solution, the fastener is a compression bolt.

In the above solution, the pressure plate is composed of first, second and third steps, the top surface of the first step is against the bottom surface of the guide groove of the transverse guide rail, and the outer side is against the side of the guide groove of the transverse guide rail; The inner side of the first step and the top of the second step are suspended; the side of the second step is against the side of the upper plate beam of the longitudinal guide rail, and the third step is against the bottom edge of the upper plate beam of the longitudinal guide rail.

In the above solution, the side gaps between the pressure plate and the guide groove and between the pressure plate and the longitudinal guide rail are all between 0.1 mm and 0.5 mm.

In the above scheme, positioning holes are provided on both sides of the guide groove of the transverse guide rail, and mounting screw holes are provided on the pressure plate, and the compression bolts pass through the positioning holes of the transverse guide rail and are screwed in the mounting screw holes of the pressure plate, so that the horizontal The rails are locked together with the longitudinal rails.

In the above solution, a positioning block and a pressing device are also arranged on the transverse guide rail.

Compared with the prior art, the beneficial effects of the present invention are: the adjustable welding positioning device of the grid structure of the present invention uses the entire upper plate beam of the longitudinal guide rail I-beam as the guide rail, and the lower plate beam of the horizontal guide rail I-beam A guide groove is provided on the plate girder, and a pressure plate is installed on both sides of the guide groove, and each pressure plate is compressed with at least two compression bolts, so that the present invention has the following advantages:

1. The entire upper plate beam of the longitudinal guide rail I-beam is used as the guide rail. The guide rail has a large force-bearing area and a stable structure. It does not require high material requirements and does not require too high processing accuracy.

2. Using a large-area pressing plate, there are two pressing plates and at least four pressing bolts in each guide groove, which can be fully pressed and the pressing force is large, which can avoid changes in positioning during use, and will not cause damage. The guide rail or other parts are deformed.

3. As long as the distance from the bottom surface of each guide groove to the upper plane of the upper plate beam of the transverse guide rail is equal (controlled within a suitable tolerance range (for example: ±0.1mm)), the upper plane of each I-beam can be guaranteed to be on the same In the plane, it provides a good reference plane for the welding or assembly of the grid structure.

4. Horizontal guide rails and vertical guide rails can be easily extended to multiple layers to meet the positioning needs of multi-layer grid structures that require more adjustments.

Description of drawings

Fig. 1a is the front view of an embodiment of the adjustable welding positioning device of the grid structure of the present invention: among the figure 1 represents the pressing plate; 2 represents the horizontal guide rail; 3 represents the longitudinal guide rail; 4 represents the supporting platform; 5 represents the pressing device.

Fig. 1b is a top view of an embodiment of the adjustable welding positioning device of the grid structure of the present invention: in the figure, 2 represents the horizontal guide rail; 3 represents the longitudinal guide rail; 4 represents the supporting platform.

Fig. 2a is a front view of the transverse guide rail structure of an embodiment of the adjustable welding positioning device of the network frame structure of the present invention: 6 in the figure indicates ribs; 21 indicates positioning holes; 22 indicates guide grooves.

Fig. 2b is a sectional view along line A-A of Fig. 2a.

Fig. 3 is the connection diagram of the horizontal guide rail and the longitudinal guide rail of an embodiment of the adjustable welding positioning device of the grid structure of the present invention: among the figure 1 represents the pressing plate; 2 represents the transverse guide rail; 3 represents the longitudinal guide rail; 6 represents the rib; 8 represents the pressure Tighten the bolts.

Fig. 4a is a front view of the pressing plate structure of an embodiment of the adjustable welding positioning device of the grid structure of the present invention.

Fig. 4b is a B-B sectional view of Fig. 4a.

Detailed ways

As shown in FIG. 1 a and FIG. 1 b , an embodiment of the adjustable welding positioning device of the grid structure of the present invention includes a main body composed of a support table 4 , a longitudinal guide rail 3 and a transverse guide rail 2 . The support platform 4 is a frame structure welded by channel steel or square steel pipe, which has sufficient strength, rigidity and stability.

As shown in Figure 2a and Figure 2b, the longitudinal guide rail 3 and the transverse guide rail 2 are I-beam structures welded by upper, middle and lower plate girders, which have an appropriate number of necessary ribs 6, so their structures are stable After welding, leveling, straightening and stress relief annealing are carried out, and then the upper plane and width of the upper plate beams of all longitudinal guide rails 3 and transverse guide rails 2 are processed, and the width of the upper plate beams is controlled at an appropriate Within the tolerance range (for example: -0.2mm ~ 0mm), while ensuring the flatness of the upper plane. The bottom of the lower plate beam of each transverse guide rail 2 is provided with two guide grooves 22 that are perpendicular to the transverse guide rail and have equal distances (controlled within a suitable tolerance range (for example: ±0.3mm)) and are symmetrical about the center (of course, two guide grooves 22 can also be provided. More than two guide grooves 22), the width of the guide groove 22 is controlled within a suitable tolerance range (for example: ±0.2mm), while ensuring the upper plane distance from the bottom surface of each guide groove 22 to the upper plate beam of the transverse guide rail (controlled within Appropriate tolerance ranges (for example: ±0.1mm)) are equal, and all the transverse guide rails 2 can be processed together in the same clamping to complete the guide groove 22 .

As shown in FIG. 3 and FIG. 4 a and FIG. 4 b , the longitudinal guide rail 3 supports the transverse guide rail 2 through the guide groove 22 of the transverse guide rail 2 . The pressing plate 1 is composed of first, second and third steps (11, 12, 13), and the second step 12 of the pressing plate 1 is provided with mounting screw holes 14. The top surface of the first step 11 of the pressure plate 1 abuts against the bottom surface of the guide groove 22 of the transverse guide rail 2, and the outer side of the first step 11 abuts against the side of the guide groove 22 of the transverse guide rail 2; The inner side of the step 11 and the top surface of the second step 12 are suspended; the side of the second step 12 is against the side of the upper plate beam of the longitudinal guide rail 3; the third step 13 is against the bottom of the upper plate beam of the longitudinal guide rail 3 At the same time, ensure that the gaps between the pressure plate 1 and the guide groove 22 and the side surfaces between the pressure plate 1 and the longitudinal guide rail 2 are all between 0.1 mm and 0.5 mm. The two sides of the longitudinal guide rail 3 located in the guide groove 22 are respectively clamped with the pressure plate 1, and the two sides of the guide groove 22 of the transverse guide rail 2 are also provided with positioning holes 21, and the compression bolts 8 pass through the positioning holes 21 of the transverse guide rail 2 and are screwed on the pressure plate 1. In the mounting screw holes 14 of the mounting holes, the horizontal guide rail 2 and the longitudinal guide rail 3 are locked together. In this way, the horizontal guide rail 2 and the longitudinal guide rail 3 form a grid structure as shown in Figure 1b, and the operator can stand on the vertical guide rail 3 The operation is completed between the outer sides of the two transverse guide rails 2. Since the bottom surface of each transverse guide rail guide groove 22 is equal to the upper plane distance of the upper plate girder of the transverse guide rail 2, and the upper plane of the longitudinal guide rail 3 is the processing surface, so each transverse guide rail 2 and longitudinal guide rail 3 are tightened as shown in Figure 3 After fixing, the upper planes of all transverse guide rails 2 will be in the same plane (the flatness is not greater than 0.5mm in the whole range). A suitable positioning block (not shown in the figure) and a pressing device 5 are also arranged on the transverse guide rail 2 .

When in use, the crossbeam of the side frame to be assembled and welded is installed on the transverse guide rail 2, and the crossbeam is pressed with the pressing device 5, and the longitudinal beam of the side frame is placed on the two transverse guide rails 2 to be level with the crossbeam. That is to say, you can start to assemble and weld the side frame.

Since the tolerances of the width and spacing of the guide grooves 22 of the transverse guide rail are controlled within an appropriate tolerance range, and the sides between the pressure plate 1 and the guide groove 22 and the sides between the pressure plate 1 and the longitudinal guide rail 3 have adopted a suitable clearance fit, so loosen the compression bolts After 8, the transverse guide rails 2 can be moved in parallel to adjust the distance between the transverse guide rails 2, thereby adapting to the positioning needs of other vehicle models for side frame assembly and welding. Diagonal size error etc. changes.

Since the upper plane and width of the upper plate beams of all longitudinal guide rail I-beams and transverse guide rail I-beams have been machined, the width of the upper plate beams should be controlled within a suitable tolerance range (for example: -0.2mm～0mm) , and at the same time ensure the flatness of the upper plane of each upper plate beam, and use the upper plate beam of the longitudinal guide rail I-beam as the guide rail, so the guide rail has a large stress area, stable structure, and can withstand a large compressive force. The requirements are not high and do not require too high machining accuracy.

Due to the use of a large-area pressing plate 1, there are two pressing plates 1 in each guide groove 22, and each pressing plate 1 is fastened by two pressing bolts, which can be pressed with all its strength and the pressing force is large, so it can be avoided during use. The positioning of the positioning device changes without causing deformation of other parts of the positioning device.

The horizontal guide rail and the longitudinal guide rail of the present invention can be extended to multiple layers, so after extending this structure to multiple layers, it can meet the positioning needs of the multi-layer grid structure requiring more adjustments.

Claims (8)

1. the adjustable position welding device of a grid structure; It comprises the main body of being made up of brace table, longitudinal rail, cross slide way; These longitudinal rails and cross slide way all are the structural I-beam that adopts upper and lower plate-girder and middle plate-girder to be welded, and it is characterized in that

Offer at least two vertical with cross slide way and be centrosymmetric gathering sills on the following plate-girder of these cross slide waies; These longitudinal rails support cross slide way through the gathering sill of these cross slide waies; And two pressing plates that are arranged in gathering sill are arranged in the both sides of longitudinal rail respectively; Through the securing member locking, make the fastening location of cross slide way and longitudinal rail between cross slide way and the pressing plate.

2. the adjustable position welding device of grid structure according to claim 1; It is characterized in that; The distance on plane equates on the last plate-girder of the bottom surface of said each gathering sill to cross slide way, and its margin of tolerance is ± 0.1mm, and the margin of tolerance of said gathering sill width is ± 0.2mm.

3. the adjustable position welding device of grid structure according to claim 1 is characterized in that, is provided with gusset in said longitudinal rail and the cross slide way, and the margin of tolerance of the width of plate-girder is-0.2mm～0mm on said longitudinal rail and the cross slide way.

4. the adjustable position welding device of grid structure according to claim 1 is characterized in that, said securing member is a hold-down bolt.

5. the adjustable position welding device of grid structure according to claim 1; It is characterized in that; Said pressing plate is made up of first, second and third grade step, and the end face of first order step is resisted against on the bottom surface of gathering sill of cross slide way, and lateral surface is against the side of the gathering sill of cross slide way; The end face of the medial surface of first order step and second level step is unsettled; The side of second level step is against the last plate-girder side of longitudinal rail, and third level step props up the last plate-girder base of said longitudinal rail.

6. the adjustable position welding device of grid structure according to claim 5 is characterized in that, the gap of side is all between 0.1mm～0.5mm between said pressing plate and gathering sill and pressing plate and the longitudinal rail.

7. the adjustable position welding device of grid structure according to claim 1; It is characterized in that; Locating hole is offered in the gathering sill both sides of said cross slide way; And offer the installation screw on the said pressing plate, the locating hole that hold-down bolt passes cross slide way is arranged in the installation screw of pressing plate, and cross slide way and longitudinal rail are locked together.

8. the adjustable position welding device of grid structure according to claim 1 is characterized in that, also sets locating piece and hold down gag on the said cross slide way.

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