阅读说明：本技术 一种内环与支板电子束焊的工艺设计 (Process design for electron beam welding of inner ring and support plate ) 是由 李英 杨烁 宋文清 曲伸 葛沁 于 2021-10-18 设计创作，主要内容包括：发明专利涉及一种内环与支板电子束焊的工艺设计,包括支板焊接结构的设计-内环支板头的结构设计-装配-电子束焊接内外环与支板-质量验收-整体机械加工；本发明是在原有接头设计的基础了提出了改进方案,采用扩散焊支板且在接头结构上进行了改进,同时内环铸件留有一定的工艺余量以保证两者连接满足电子束焊接接头设计结构的要求；本发明的结构有效的减小了焊接变形及残余应力,提高了零件制造符合性及使用可靠性。(The invention relates to a process design for electron beam welding of an inner ring and a support plate, which comprises the steps of designing a support plate welding structure, designing the structure of a support plate head of the inner ring, assembling, welding the inner ring and the outer ring and the support plate by electron beams, checking quality and machining integrally; the invention provides an improved scheme on the basis of the original joint design, adopts a diffusion welding support plate and improves the joint structure, and meanwhile, an inner ring casting is provided with a certain process margin to ensure that the connection of the inner ring casting and the inner ring casting meets the requirement of the design structure of an electron beam welding joint; the structure of the invention effectively reduces welding deformation and residual stress, and improves the manufacture conformity and the use reliability of parts.)

1. A process design for electron beam welding of an inner ring and a support plate is characterized by comprising the following steps:

the method comprises the following steps: design of support plate welding structure

Because the design of the electron beam welding joint requires that the wall thickness difference is not more than 10% delta, particularly, the wall thickness of the welding joint parts at the two sides of the support plate is only 1mm, in order to ensure the uniformity of the wall thickness of the welding joint parts, when the parts of the diffusion welding support plate are designed, the allowance of 0.3mm is increased along the molded surface on the outer contour 1.5mm away from the welding seam allowance, and the parts are repositioned and processed after the integral combination processing;

a reinforcing rib is arranged in the support plate, the trend of the reinforcing rib is changed at a position 10mm away from the welding line, and the L shape is changed from a linear shape; reserving 0.6mm shrinkage allowance at the edge of the welding seam;

the design structure of the U-shaped groove processing of the tail edge of the support plate at the position 5mm away from the welding joint is changed into an integral full-length equal-thickness structure for ensuring the uniformity of the wall thickness of the tail edge of the support plate;

step two: structural design of inner ring support plate head

The inner ring is a casting, 3mm of allowance is reserved on one side of the inner ring supporting plate head during casting, and the consistency of the wall thickness is guaranteed through subsequent machining;

removing the reinforcing ribs with the length of 1mm in the original design at the position, which is 1mm away from the welding seam, of the originally designed reinforcing ribs in the inner ring support plate head so as to ensure the uniformity of the wall thickness of the welding joint part of the inner ring support plate head;

in order to ensure the welding quality of the electron beam, positions 5mm away from a welding seam are designed into planes at the position of an originally designed U-shaped groove of the inner ring supporting plate head so as to ensure the uniformity of the wall thickness of the welding seam part;

step three: assembly

Assembling and positioning welding are carried out on a special welding tool, wherein the support plate and the support plate are internally tensioned along the outer edge seam allowance inside the support plate, the support plate and the inner flow channel surface inside the outer ring are tensioned, and the normal welding assembly requirement is ensured;

step four: electron beam welding inner and outer rings and support plate

For the assembled parts, the inner ring and the support plate are subjected to positioning welding by adopting electron beam welding, the welding deformation can be reduced by electron beam welding positioning compared with argon arc welding, and the inner ring and the support plate are welded by adopting optimized parameters; then, the outer ring and the support plate are subjected to positioning welding, and welding is carried out according to optimized parameters;

step five: quality acceptance

After welding, the parts are checked by visual inspection, X-ray inspection and coloring, and the overproof defect is not found;

step six: integral machining

The welding boss reserved for the inner ring supporting plate head and the supporting plate is integrally machined on the part according to the design drawing requirements, and machining is carried out according to the design drawing size during combined machining so as to guarantee smooth switching of the part and assembly of the adjustable blade.

Technical Field

The invention relates to the technical field of aero-engines, in particular to a process design for electron beam welding of an inner ring and a support plate.

Background

The welding of the inner ring supporting plate head and the supporting plate of the air inlet casing originally adopts an argon arc welding process, the inner ring is of a casting structure, the wall thickness of a welding part is uneven, the wall thickness of the welding part is only polished manually before welding to enable the welding part to have metallic luster, the supporting plate adopts a superplastic forming diffusion connection structure, the wall thickness of the supporting plate is uneven, a triangular area structure exists, the two structures are combined, and only the argon arc welding process can be adopted for ensuring the welding quality. The argon arc welding has large welding deformation, so that the straightness and the position degree of the support plate are difficult to meet the requirements of design drawings, and the residual stress of parts is large, so that the cracking phenomenon is easily caused in the use process.

Disclosure of Invention

The invention aims to provide a process design for electron beam welding of an inner ring and a support plate, which comprises the following specific scheme:

a process design for electron beam welding of an inner ring and a support plate comprises the following steps:

the method comprises the following steps: design of support plate welding structure

Because the design of the electron beam welding joint requires that the wall thickness difference is not more than 10% delta, particularly, the wall thickness of the welding joint parts at the two sides of the support plate is only 1mm, in order to ensure the uniformity of the wall thickness of the welding joint parts, when the parts of the diffusion welding support plate are designed, the allowance of 0.3mm is increased along the molded surface on the outer contour 1.5mm away from the welding seam allowance, and the parts are repositioned and processed after the integral combination processing;

a reinforcing rib is arranged in the support plate, the trend of the reinforcing rib is changed at a position 10mm away from the welding line, and the L shape is changed from a linear shape; reserving 0.6mm shrinkage allowance at the edge of the welding seam;

the design structure of the U-shaped groove processing of the tail edge of the support plate at the position 5mm away from the welding joint is changed into an integral full-length equal-thickness structure for ensuring the uniformity of the wall thickness of the tail edge of the support plate;

step two: structural design of inner ring support plate head

The inner ring is a casting, 3mm of allowance is reserved on one side of the inner ring supporting plate head during casting, and the consistency of the wall thickness is guaranteed through subsequent machining;

removing the reinforcing ribs with the length of 1mm in the original design at the position, which is 1mm away from the welding seam, of the originally designed reinforcing ribs in the inner ring support plate head so as to ensure the uniformity of the wall thickness of the welding joint part of the inner ring support plate head;

in order to ensure the welding quality of the electron beam, positions 5mm away from a welding seam are designed into planes at the position of an originally designed U-shaped groove of the inner ring supporting plate head so as to ensure the uniformity of the wall thickness of the welding seam part;

step three: assembly

Assembling and positioning welding are carried out on a special welding tool, wherein the support plate and the support plate are internally tensioned along the outer edge seam allowance inside the support plate, the support plate and the inner flow channel surface inside the outer ring are tensioned, and the normal welding assembly requirement is ensured;

step four: electron beam welding inner and outer rings and support plate

For the assembled parts, the inner ring and the support plate are subjected to positioning welding by adopting electron beam welding, the welding deformation can be reduced by electron beam welding positioning compared with argon arc welding, and the inner ring and the support plate are welded by adopting optimized parameters; then, the outer ring and the support plate are subjected to positioning welding, and welding is carried out according to optimized parameters;

step five: quality acceptance

After welding, the parts are checked by visual inspection, X-ray inspection and coloring, and the overproof defect is not found;

step six: integral machining

The welding boss reserved for the inner ring supporting plate head and the supporting plate is integrally machined on the part according to the design drawing requirements, and machining is carried out according to the design drawing size during combined machining so as to guarantee smooth switching of the part and assembly of the adjustable blade.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides an improved scheme on the basis of the original joint design, adopts a diffusion welding support plate and improves the joint structure, realizes the change from argon arc welding to electron beam, and leaves a certain process margin to ensure that the connection of the inner ring and the support plate meets the requirement of the electron beam welding joint design structure when the inner ring and the support plate are welded, and under the condition that the outer ring and the support plate head are not constrained, the shrinkage deformation is controlled to be about 0.3mm, which has great improvement compared with the (1-2) mm of argon arc welding; the design structure can effectively reduce welding deformation and residual stress, and improves the manufacturing conformity and the use reliability of parts.

Drawings

FIG. 1 is a schematic view of a trailing edge portion of a plate prior to prior art optimization;

FIG. 2 is a schematic view of an inner ring plate head prior to prior art optimization;

FIG. 3 is a schematic view of the profile of the outer profile of the welded joint of the support plate;

FIG. 4 is a schematic representation of K1-K1 of FIG. 3;

FIG. 5 is a schematic structural view of a reinforcing rib part of a support plate welded joint;

FIG. 6 is a schematic view of the optimized trailing edge of the plate of the present invention;

FIG. 7 is a schematic view of an optimized inner ring plate head of the present invention;

FIG. 8 is a schematic view of an inner ring and a welding structure.

In the figure: 1-shrinkage allowance of electron beam welding 2-reinforcing rib a 3-welding seam 4-U-shaped groove a 5-reinforcing rib b 6-U-shaped groove b 7-electron beam welding 8-inner ring 9-support plate.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 3-8, a process design for electron beam welding of an inner ring and a support plate comprises the following steps:

the method comprises the following steps: design of support plate welding structure

Because the design of the electron beam welding joint requires that the wall thickness difference is not more than 10% delta, particularly, the wall thickness of the welding joint parts at the two sides of the support plate is only 1mm, in order to ensure the uniformity of the wall thickness of the welding joint parts, when the parts of the diffusion welding support plate are designed, the allowance of 0.3mm is increased along the molded surface on the outer contour 1.5mm away from the welding seam allowance, and the parts are repositioned and processed after the integral combination processing;

a reinforcing rib a2 is arranged in the support plate, the trend of the reinforcing rib is changed at a position 10mm away from the welding seam 3, and the straight line type is changed into the L shape; reserving electron beam welding shrinkage allowance 1 of 0.6mm at the edge of the welding line;

the design structure of the U-shaped groove a4 processing of the tail edge of the support plate at the position 5mm away from the welding joint is changed into an integral full-length equal-thickness structure for ensuring the uniformity of the wall thickness of the tail edge of the support plate;

step two: structural design of inner ring support plate head

The inner ring is a casting, 3mm of allowance is reserved on one side of the inner ring supporting plate head during casting, and the consistency of the wall thickness is guaranteed through subsequent machining;

the reinforcing rib b5 with the full length originally designed in the inner ring support plate head is 1mm away from the welding seam, and the reinforcing rib with the length of 1mm in the original design is removed, so that the uniformity of the wall thickness of the welding joint part of the inner ring support plate head is ensured;

in order to ensure the welding quality of the electron beams, positions 5mm away from a welding seam are designed into planes at the position of an originally designed U-shaped groove b6 of the inner ring supporting plate head so as to ensure the uniform wall thickness of the welding seam;

step three: assembly

Assembling and positioning welding are carried out on a special welding tool, wherein the support plate and the support plate are internally tensioned along the outer edge seam allowance inside the support plate, the support plate and the inner flow channel surface inside the outer ring are tensioned, and the normal welding assembly requirement is ensured;

step four: electron beam welding inner and outer rings and support plate

For the assembled parts, the inner ring 8 and the support plate 9 are subjected to positioning welding by adopting an electron beam welding 7, the welding deformation can be reduced by electron beam welding positioning compared with argon arc welding, and the inner ring 8 and the support plate 9 are welded by adopting optimized parameters; then, the outer ring and the support plate are subjected to positioning welding, and welding is carried out according to optimized parameters;

step five: quality acceptance

After welding, the parts are checked by visual inspection, X-ray inspection and coloring, and the overproof defect is not found;

step six: integral machining

The welding boss reserved for the inner ring supporting plate head and the supporting plate is integrally machined on the part according to the design drawing requirements, and machining is carried out according to the design drawing size during combined machining so as to guarantee smooth switching of the part and assembly of the adjustable blade.