阅读说明：本技术 一种涡轮盘斜树形榫槽拉削变形控制组件及拉削工艺 (Turbine disc inclined tree-shaped mortise broaching deformation control assembly and broaching process ) 是由 钟旭 王泽霞 田凯 蒋举 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种涡轮盘斜树形榫槽拉削变形控制组件及拉削工艺,属于航空发动机技术领域,其包括：第一齿形件、第二齿形件以及楔形件；第一齿形件和第二齿形件的结构相同并间隔对称设置,第一齿形件和第二齿形件均包括与涡轮盘斜树形榫槽相匹配的齿形侧,以及倾斜设置、并与齿形侧相对的挤压侧,第一齿形件和第二齿形件的挤压侧相对设置,并形成楔形空间,楔形件伸入到楔形空间中并分别与第一齿形件和第二齿形件接触,用于对涡轮盘斜树形榫槽的支撑。本发明在常规精拉削之后通过拉削变形控制组件对不合格榫槽进行修整,通过齿形约束,增大相邻榫槽的结构刚性,能够减少榫槽拉削变形,从而提高零件的加工精度。(The invention discloses a turbine disc inclined tree-shaped mortise broaching deformation control assembly and a broaching process, which belong to the technical field of aero-engines and comprise the following steps: a first tooth, a second tooth, and a wedge; the structure of first profile of tooth and second profile of tooth is the same and interval symmetry sets up, first profile of tooth and second profile of tooth all include with the oblique tree-shaped tongue-and-groove assorted profile of tooth side of turbine disc to and the slope sets up, and with the relative extrusion side in profile of tooth side, the extrusion side of first profile of tooth and second profile of tooth sets up relatively, and form wedge space, the wedge stretches into in the wedge space and contact with first profile of tooth and second profile of tooth respectively, be used for the support to the oblique tree-shaped tongue-and-groove of turbine disc. According to the invention, after conventional finish broaching, the unqualified mortises are trimmed through the broaching deformation control assembly, the structural rigidity of adjacent mortises is increased through tooth shape constraint, and the broaching deformation of the mortises can be reduced, so that the processing precision of parts is improved.)

1. A turbine disk skewed tree-shaped mortise broaching deformation control assembly, comprising: a first tooth (10), a second tooth (20) and a wedge (30); the structure of the first tooth piece (10) and the second tooth piece (20) are the same and are arranged symmetrically at intervals, the first tooth piece (10) and the second tooth piece (20) respectively comprise a tooth-shaped side (11) matched with the inclined tree-shaped mortise of the turbine disc and a squeezing side (12) which is obliquely arranged and is opposite to the tooth-shaped side (11), the squeezing sides (12) of the first tooth piece (10) and the second tooth piece (20) are oppositely arranged and form a wedge-shaped space, and the wedge piece (30) extends into the wedge-shaped space and is respectively contacted with the first tooth piece (10) and the second tooth piece (20) and is used for supporting the inclined tree-shaped mortise of the turbine disc.

2. The assembly according to claim 1, wherein the wedge-shaped elements (30) are provided with fixing elements (31) at the ends with larger cross-section, said fixing elements (31) being connected to the first and second toothed elements (10, 20), respectively.

3. The assembly according to claim 2, wherein the wedge members (30) are sleeved with elastic washers (40), and the elastic washers (40) are located between the fixing block (31) and each tooth-shaped member.

4. The assembly according to claim 3, wherein the fixing block (31) is connected to the first and second tooth-shaped members (10, 20) by means of bolts (50), respectively, and wherein the fixing block (31) is further connected to the first and second tooth-shaped members (10, 20) by means of pins (60), respectively.

5. The turbine disk skewed tree-like mortise broaching deformation control assembly according to any of claims 1 to 4, wherein the length of the wedge (30) extending into the wedge space is not less than 2/3 of the length of the wedge space.

6. A broaching process for broaching a deformation control assembly based on the inclined tree-shaped mortise of the turbine disk as claimed in any one of claims 1 to 5, comprising the following steps:

s1: processing the turbine disc blank according to a conventional processing sequence until the first fine broaching is finished;

s2: loosening the clamping of the turbine disc, standing for a period of time, and releasing the broaching stress;

s3: measuring each mortise, and finding out the tenons which are unqualified to process;

s4: and (4) mounting a broaching deformation control assembly in two adjacent mortises of the unqualified mortises, and finely broaching the unqualified mortises again until all the unqualified mortises meet the precision requirement.

7. The broaching process of claim 6, wherein in step S4, the step of installing the broaching deformation control assembly comprises: placing a first tooth-shaped member (10) and a second tooth-shaped member (20) at two sides of the same mortise, enabling the first tooth-shaped member (10) and the second tooth-shaped member (20) to be respectively contacted with the mortise and forming a wedge-shaped space, and then extending a wedge-shaped member (30) into the wedge-shaped space to enable the first tooth-shaped member (10) and the second tooth-shaped member (20) to be tightly contacted with the turbine disc; and after the deformation control assemblies are respectively installed in two adjacent mortises of the unqualified mortises, supporting two sides of the unqualified mortises.

8. Broaching process according to claim 7, characterized in that the wedge (30), after having been inserted into the wedge space, is connected to the first (10) and second (20) toothing by means of a bolt (50), respectively.

9. The broaching process according to claim 6, wherein the standing time is not less than 8 hours in step S2.

Technical Field

The invention relates to the technical field of aero-engines, in particular to a turbine disc inclined tree-shaped mortise broaching deformation control assembly and a broaching process.

Background

In the development of a new-generation turbine disk of an aero-engine, GH4065A is applied to the new material, most turbine disks are connected by inclined tree-shaped mortises, and the turbine disk adopting GH4065A has the characteristics of high inclined tree-shaped mortises precision (the requirements on the processing position, size, outline precision and luminosity of the mortises are high) and small circumferential distance, so that the manufacturability is poor, broaching is easy to deform, and the processing and detection are very difficult. At present, when the inclined tree-shaped mortise is machined, a broaching machine broaching mode is usually adopted for machining, but the turbine disc adopting GH4065A has the characteristics of high precision and small circumferential distance, the deformation amount is large by adopting a conventional machining mode, and the precision requirement cannot be met.

Disclosure of Invention

The invention aims to provide a turbine disk inclined tree-shaped mortise broaching deformation control assembly and a broaching process, and aims to solve the problem that the existing inclined tree-shaped mortise machining mode cannot meet the requirement of turbine disk machining by adopting GH 4065A.

The technical scheme for solving the technical problems is as follows:

a turbine disk skewed tree-form mortise broaching deformation control assembly comprising: a first tooth, a second tooth, and a wedge; the structure of first profile of tooth and second profile of tooth is the same and interval symmetry sets up, first profile of tooth and second profile of tooth all include with the oblique tree-shaped tongue-and-groove assorted profile of tooth side of turbine disc to and the slope sets up, and with the relative extrusion side in profile of tooth side, the extrusion side of first profile of tooth and second profile of tooth sets up relatively, and form wedge space, the wedge stretches into in the wedge space and contact with first profile of tooth and second profile of tooth respectively, be used for the support to the oblique tree-shaped tongue-and-groove of turbine disc.

Furthermore, a fixing block is arranged at the end with the larger cross section of the wedge, and the fixing block is connected with the first tooth-shaped member and the second tooth-shaped member respectively.

Furthermore, the outer side of the wedge piece is sleeved with an elastic gasket, and the elastic gasket is positioned between the fixed block and each tooth-shaped element.

Furthermore, the fixed block is connected with the first tooth-shaped element and the second tooth-shaped element through bolts respectively, and the fixed block is also connected with the first tooth-shaped element and the second tooth-shaped element through pins respectively.

Further, the wedge extends into the wedge space a length greater than 2/3 the length of the wedge space.

A broaching process based on the turbine disk inclined tree-shaped mortise broaching deformation control assembly comprises the following steps:

s1: processing the turbine disc blank according to a conventional processing sequence until the first fine broaching is finished;

s2: loosening the clamping of the turbine disc, standing for a period of time, and releasing the broaching stress;

s3: measuring each mortise, and finding out the tenons which are unqualified to process;

s4: and (4) mounting a broaching deformation control assembly in two adjacent mortises of the unqualified mortises, and finely broaching the unqualified mortises again until all the unqualified mortises meet the precision requirement.

Further, in step S4, the specific steps of installing the broaching deformation control assembly include: placing the first tooth-shaped part and the second tooth-shaped part on two sides of the same mortise to enable the first tooth-shaped part and the second tooth-shaped part to be respectively contacted with the mortise and form a wedge-shaped space, and then extending the wedge-shaped part into the wedge-shaped space to enable the first tooth-shaped part and the second tooth-shaped part to be tightly contacted with the turbine disc; and after the deformation control assemblies are respectively installed in two adjacent mortises of the unqualified mortises, supporting two sides of the unqualified mortises.

Further, the wedge member is connected to the first and second tooth members by bolts after being inserted into the wedge space.

Further, in the above step S2, the standing time is not less than 8 hours.

The invention has the following beneficial effects:

(1) the broaching deformation control assembly comprises a first toothed part, a second toothed part and a wedge piece, wherein the first toothed part and the second toothed part are tightly attached to two sides of a mortise, the first toothed part and the second toothed part are in tight contact with the mortise through the wedge piece, the inherent frequency and the rigidity of a part are increased, vibration lines generated by broaching vibration are reduced, broaching deformation control assemblies are respectively placed in the adjacent mortises of the mortise to be machined, the structural rigidity of the adjacent mortises is increased through tooth form constraint, and the broaching deformation of the mortise is reduced, so that the machining precision of the part is improved.

(2) In the broaching process, after the conventional broaching process, the unqualified mortise is subjected to finish broaching again through the broaching deformation assembly, namely the unqualified mortise is corrected, so that the processing precision of the mortise can be effectively improved, and the precision of the turbine disc with high precision and small circumferential distance can meet the requirement.

Drawings

FIG. 1 is a schematic structural view of a wheel disc inclined tree-shaped mortise broaching deformation control assembly according to the present invention;

FIG. 2 is a schematic diagram of the distribution of bolts and screws of the assembly for controlling broaching deformation of the inclined tree-shaped mortise of the wheel disc according to the present invention;

FIG. 3 is a schematic view of a first tooth of the present invention;

fig. 4 is a schematic view of the machining of a turbine disk of the present invention.

In the figure: 10-a first tooth-shaped element; 11-tooth-shaped side; 12-the press side; 20-a second toothed member; 30-a wedge-shaped piece; 31-fixing block; 40-an elastic gasket; 50-bolt; 60-pins; 70-turbine disk.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example 1

Referring to fig. 1 to 3, a turbine disk inclined tree-shaped mortise broaching deformation control assembly includes: a first toothed member 10, a second toothed member 20 and a wedge member 30. The shape and size of the first and second tooth-shaped members 10 and 20 are respectively matched with the shape and size of two sides of the inclined tree-shaped mortise of the turbine disc 70, when in use, the first and second tooth-shaped members 10 and 20 are matched with two sides of the mortise, and after the first and second tooth-shaped members 10 and 20 are matched, a wedge-shaped space is formed between the first and second tooth-shaped members 10 and 20 for the wedge-shaped members 30 to extend into, so that the first and second tooth-shaped members 10 and 20 are tightly attached to two sides of the mortise.

The first tooth part 10 and the second tooth part 20 are identical in structure and symmetrically arranged at intervals, the first tooth part 10 and the second tooth part 20 respectively comprise a tooth-shaped side 11 and a squeezing side 12, the tooth-shaped side 11 is matched with a tongue-and-groove of the turbine disc 70, the squeezing side 12 corresponds to the tooth-shaped side 11 and is inclined, and the squeezing sides 12 of the first tooth part 10 and the second tooth part 20 are oppositely arranged so that a wedge-shaped space is formed between the two squeezing sides 12. When the broaching deformation control assembly is engaged with the turbine disk 70, the end of the wedge-shaped space having the larger cross-section is adjacent to the opening of the mortise and the end of the wedge-shaped space having the smaller cross-section is adjacent to the root of the mortise.

The wedge 30 extends into the wedge space, and both sides of the wedge are respectively contacted with the two pressing sides 12, so that each tooth can be closely contacted with the turbine disc 70 through the wedge support. In this embodiment, wedge 30 extends into the wedge space a length 2/3 of the length of the wedge space, ensuring that wedge 30 is effectively supported and ensuring that wedge 30 does not contact turbine disk 70. In other embodiments of the invention, the length of wedge 30 extending into the wedge space may also be greater than 2/3, however, the length of wedge 30 extending into the wedge space should not be greater than the wedge space length.

The end of the wedge member 30 with the larger cross section is provided with a fixed block 31, the fixed block 31 is respectively connected with the first tooth-shaped member 10 and the second tooth-shaped member 20, meanwhile, in order to adjust the degree of tight contact, the wedge member 30 is sleeved with an elastic gasket 40, the elastic gasket 40 is positioned between the fixed block 31 and each tooth-shaped member, a gap is ensured between the fixed block 31 and each tooth-shaped member, and thus the degree of tight contact is adjusted.

In this embodiment, the fixing block 31 is connected to the first and second tooth-shaped members 10 and 20 by bolts 50, respectively, and the fixing block 31 is further connected to the first and second tooth-shaped members 10 and 20 by pins 60, respectively, so that the movement of the wedge 30 is achieved by screwing the bolts 50, and the wedge 30 is prevented from being loosened during the machining.

Example 2

Referring to fig. 4, a broaching process for broaching a deformation control assembly based on the inclined tree-shaped mortise of the turbine disk in embodiment 1 includes the following steps:

s1: processing a turbine disc blank made of GH4065A according to a conventional processing sequence until the first finish broaching is finished;

s2: loosening the clamping of the turbine disc, ensuring the positioning hole to be immobile, and releasing the broaching stress after standing for 8 hours;

s3: measuring each inclined tree-shaped mortise through a measuring bar, and finding out the unqualified mortise;

s4: in two adjacent tongue-and-grooves of unqualified tongue-and-groove, install broaching deformation control assembly, the concrete installation step of single broaching deformation control assembly is:

placing the first tooth-shaped member 10 and the second tooth-shaped member 20 on both sides of the same mortise, so that the first tooth-shaped member 10 and the second tooth-shaped member 20 are respectively in contact with the mortise and form a wedge-shaped space, then inserting the wedge-shaped member 30 into the wedge-shaped space, and tightly contacting the first tooth-shaped member 10 and the second tooth-shaped member 20 with the turbine disk 70 by screwing the bolt 50;

after the deformation control assemblies are respectively installed in two adjacent mortises of the unqualified mortises, the two sides of the unqualified mortises are supported, the structural rigidity of the adjacent mortises is increased through tooth-shaped constraint, and the broaching deformation of the mortises is reduced;

s5: carry out the finish broaching to unqualified tongue-and-groove, realize the maintenance to unqualified tongue-and-groove, through the support of broaching deformation control assembly, the broaching of tongue-and-groove is out of shape for a short time, and the tongue-and-groove after repairing can satisfy the machining precision requirement.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.