CN109866940B

CN109866940B - Double-square steel bearing transition beam and manufacturing method thereof

Info

Publication number: CN109866940B
Application number: CN201711258188.XA
Authority: CN
Inventors: 臧伟锋; 陈安; 张侃; 廖江海; 苏少普
Original assignee: AVIC Aircraft Strength Research Institute
Current assignee: AVIC Aircraft Strength Research Institute
Priority date: 2017-12-01
Filing date: 2017-12-01
Publication date: 2022-11-22
Anticipated expiration: 2037-12-01
Also published as: CN109866940A

Abstract

The invention discloses a double-square steel bearing transition beam and a manufacturing method thereof, and belongs to the technical field of airplane structure strength tests. Aiming at the problems of poor safety and reliability, high cost, limited bearing capacity and the like caused by large weight, large processing amount and more welding seams of the conventional transition beam, the invention provides a double-steel bearing transition beam and a manufacturing method thereof, wherein the double-steel bearing transition beam comprises the following steps: the transition beam is formed by welding an outer end plate, outer square steel, inner square steel, a connecting plate, a reinforcing rib and an inner end plate, wherein the connecting plate is welded around two trisection positions outside the inner square steel, the inner end plate is welded at two ends of the inner square steel, the inner square steel welded with the connecting plate and the inner end plate is placed in the outer square steel, the connecting plate is welded with the outer square steel, the outer end plate is welded at two ends of the outer square steel, and the inner end plate and the outer end plate at the same end of the transition beam are welded. The invention has the advantages that the weight is 1/3 lighter than that of the existing transition beam under the condition of the same bearing capacity, the use of reduced welding seams is safer and more reliable, the processing is convenient, the workload of milling and welding is greatly reduced, and the cost is lower.

Description

Double-square steel bearing transition beam and manufacturing method thereof

Technical Field

The invention belongs to the technology of airplane structural strength tests, and relates to a double-square steel bearing transition beam.

Background

The bearing transition beam is test equipment frequently used in an airplane structural strength test, and is mainly used for bearing equipment such as a test portal frame, a test device, a test fixture and a test stand column. Because the bearing load is large, the transition beam welded by the standard section steel cannot meet the test requirements, the existing transition beam is formed by welding steel plates, and the structural form and the section shape of the transition beam are shown in figure 1. The existing transition beam uses a large amount of steel plates, so that the weight is large; each steel plate needs milling and welding processing, and the workload is large; the existing transition beam is formed by welding steel plates, a large number of welding seams are generated, and the safety and the reliability of the welding seams are poor; the existing transition beam has irregular appearance and higher cost; the height of the weld joint of the existing transition beam is generally lower than the thickness of a steel plate, and although a thicker steel plate is used, the bearing capacity of the transition beam is limited.

Disclosure of Invention

The invention aims to provide a double-square steel bearing transition beam which is light in weight, strong in bearing capacity, simple and convenient to manufacture and low in cost.

In order to solve the technical problems, the technical scheme of the invention is as follows: the double-square steel bearing transition beam comprises an outer end plate 1, outer square steel 2, inner square steel 3, a connecting plate 4, reinforcing ribs 5 and an inner end plate 6. Wherein, the square cold-bending hollow square steel is adopted for both the outer square steel 2 and the inner square steel 3, and the lengths are equal. Welding a connecting plate 4 on the outer side of the inner square steel 3; welding inner end plates 6 at two ends of the inner square steel 3; the inner square steel 3 welded with the connecting plate 4 and the inner end plate 6 is placed into the outer square steel 2; welding a connecting plate 4 on the outer square steel 2 and the inner square steel 3; welding outer end plates 1 at two ends of the outer square steel 2; and welding the outer end plate 1 and the inner end plate 6 at the same end of the transition beam.

Under the condition that the bearing capacity of the two steel bearing transition beams is the same, the weight of the two steel bearing transition beams is 1/3 lighter than that of the traditional transition beam, and a large number of welding seams are avoided to be used more safely and reliably; the processing is convenient, and compared with the processing of the existing transition beam, the processing method greatly reduces the workload of milling and welding; the two steel-bearing transitional beams of the invention have regular appearance and lower cost.

Drawings

FIG. 1 is a prior art transition beam configuration and cross-sectional shape;

FIG. 2 is a two-side steel bearing transition beam of the invention;

FIG. 3 is an outer end plate of the present invention;

FIG. 4 is a cross-sectional view of the inventive outer square steel;

FIG. 5 is an inside square steel of the present invention;

FIG. 6 is a web of the present invention;

FIG. 7 is a reinforcing bar according to the present invention;

FIG. 8 is an inner end plate of the present invention.

Wherein: 1-outer end plate, 2-outer square steel, 3-inner square steel, 4-connecting plate, 5-reinforcing rib and 6-inner end plate

Detailed Description

The double-square-steel-bearing transition beam comprises an outer end plate 1, outer square steel 2, inner square steel 3, a connecting plate 4, reinforcing ribs 5 and an inner end plate 6.

The outer end plate 1 is a 'return' shaped component, as shown in fig. 3, the material is usually Q235 steel, and through holes are processed around the outer end plate 1 for connecting two pieces of both steel bearing transition beams.

The square cold-bending hollow square steel is adopted as the external square steel 2, as shown in figure 4, the peripheries of two trisection positions of the external square steel 2 are provided with gaps for welding with the connecting plate 4, two strip holes are processed on one side of the outer square steel 2, and when the two pieces of outer square steel are connected with the bearing transition beam, the strip holes are used for screwing a wrench space of a bolt.

The square cold-bending hollow square steel is selected for the inner square steel 3, as shown in fig. 5, two strip holes are machined in one side of the inner square steel 3, and when the two pieces of square steel bear the transition beam for connection, the strip holes are used for tightening a wrench space of the bolt.

The outer square steel 2 and the inner square steel 3 are equal in length.

The connecting plate 4 is a rectangular component, as shown in fig. 6, the material is usually Q235 steel, and the connecting plate 4 connects the outer square steel 2 and the inner square steel 3 together by welding. After the inner square steel 3 is welded with the connecting plate 4 and the inner end plate 6, the distance between the outer edge of the connecting plate 4 and the inner edge of the outer square steel 2 is not less than 4mm and not more than 6mm; the distance between the outer edge of the inner end plate 6 and the inner edge of the outer end plate 1 is not less than 4mm and not more than 6mm, so that the inner square steel 3 after the connecting plate 4 and the inner end plate 6 are welded can be placed into the outer square steel 2, and the subsequent welding connection is facilitated.

The reinforcing bars 5 are triangular members, as shown in fig. 7, and the material is usually Q235 steel, the right angle of which is chamfered to ensure that the joint weld is not broken by the reinforcement weld.

The inner end plate 6 is a square member, as shown in fig. 8, the material is usually Q235 steel, a through hole for connecting two pieces of steel bearing transition beams is formed in the middle of the inner end plate 6, and a welding groove is formed around the outer end face of the inner end plate 6 for welding the outer end plate 1 and the inner end plate 6.

The two steel bearing transition beams can be manufactured in the following mode:

1) The connecting plates 4 are welded around two trisection positions outside the inner square steel 3;

2) Welding inner end plates 6 at two ends of the inner square steel 3;

3) The inner square steel 3 welded with the connecting plate 4 and the inner end plate 6 is placed into the outer square steel 2;

4) Welding the connecting plates 4 on the outer square steel 2 and the inner square steel;

5) Welding outer end plates 1 at two ends of the outer square steel 2;

6) And welding the outer end plate 1 and the inner end plate 6 at the same end of the transition beam.

Claims

1. A method for manufacturing a double-square steel bearing transition beam is characterized by comprising the following steps: the double-square steel bearing transition beam comprises an outer end plate (1), outer square steel (2), inner square steel (3), a connecting plate (4), reinforcing ribs (5) and an inner end plate (6); the outer square steel (2) is sleeved outside the inner square steel (3) and has equal length; the inner end plate is welded at the two ends of the inner square steel (3); outer end plates are welded at two ends of the outer square steel; a connecting plate is welded between the inner square steel and the outer square steel; welding an outer end plate on the inner end plate at the same end; connecting plates (4) are welded around two trisection positions on the outer side of the inner square steel (3); notches which are welded correspondingly to the connecting plates (4) are machined on the periphery of the outer square steel (2), and the notches are filled when the outer square steel is welded;

the method comprises the following steps: the first step is as follows: the periphery of two trisection positions on the outer side of the inner square steel (3) is welded with a connecting plate (4); the second step is that: inner end plates (6) are welded at two ends of the inner square steel (3); the third step: the inner square steel (3) welded with the connecting plate (4) and the inner end plate (6) is placed into the outer square steel (2); the fourth step: welding the connecting plates (4) on the outer square steel (2) and the inner square steel; the fifth step: welding outer end plates (1) at two ends of the outer square steel (2); and a sixth step: and welding the outer end plate (1) and the inner end plate (6) of the same end of the two steel bearing transition beams.

2. A method of manufacturing a double square steel load-bearing transition beam as claimed in claim 1, wherein: the outer square steel (2) and the inner square steel (3) are both square cold-bending hollow square steel.

3. A method of manufacturing a bimanual load-bearing transition beam according to claim 1, wherein: the distance between the outer edge of the outer side connecting plate (4) of the inner square steel (3) and the inner side of the outer square steel (2) is not less than 4mm and not more than 6mm; the distance between the outer edge of the inner end plate (6) and the inner edge of the outer end plate (1) is not less than 4mm and not more than 6mm.

4. A method of manufacturing a double square steel load-bearing transition beam as claimed in claim 1, wherein: reinforcing ribs (5) are arranged between the connecting plate (4) and the inner square steel (3), between the inner square steel (3) and the inner end plate (6), and between the outer square steel (2) and the outer end plate (1) for reinforcement.

5. A method of manufacturing a double square steel load-bearing transition beam as claimed in claim 4, wherein: the reinforcing ribs (5) are of a triangular structure, and right angles of the reinforcing ribs are chamfered.

6. A method of manufacturing a bimanual load-bearing transition beam according to claim 1, wherein: and a welding groove is processed on the periphery of the outer end surface of the inner end plate (6), and the welding of the outer end plate (1) and the inner end plate (6) is strengthened.

7. A method of manufacturing a double square steel load-bearing transition beam as claimed in claim 6, wherein: through holes are processed in the outer end plate (1) and the inner end plate (6), and the two pieces of double-side steel bearing transitional beams are connected through the through holes by bolts.

8. A method of manufacturing a double square steel load-bearing transition beam as claimed in claim 6, wherein: the same sides of the outer square steel (2) and the inner square steel (3) are both processed with long holes, and wrench spaces for bolt connection are reserved.