CN113732634A - Method for processing axial dovetail type mortise - Google Patents
Method for processing axial dovetail type mortise Download PDFInfo
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- CN113732634A CN113732634A CN202111243403.5A CN202111243403A CN113732634A CN 113732634 A CN113732634 A CN 113732634A CN 202111243403 A CN202111243403 A CN 202111243403A CN 113732634 A CN113732634 A CN 113732634A
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- mortise
- axial dovetail
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a method for processing an axial dovetail type mortise, which comprises the following steps of firstly, processing the axial dovetail type mortise by adopting a broaching mode; and step two, expanding the groove width of the axial dovetail type mortise by adopting a boring mode on the basis of the processed axial dovetail type mortise. The invention can carry out supplementary processing on the mortise on the numerical control five-axis processing center, enlarge the groove width and avoid the restriction of parts due to the groove width value.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a widening machining method for the groove width of an axial dovetail-shaped mortise after broaching.
Background
The turbine disc mortise of the existing part of engines is of an axial dovetail type mortise structure. The turbine disc is made of titanium alloy or powder high-temperature alloy, the part value is high, the mortise has the condition of unqualified size after broaching, or the mortise has special size requirements after use, and the secondary processing of the mortise by using a broach is difficult to carry out.
Disclosure of Invention
The invention aims to provide a method for machining an axial dovetail type mortise, or a method for supplementing the width of the axial dovetail type mortise after broaching, which aims to supplement the width of the axial dovetail type mortise on a numerical control five-axis machining center after the axial dovetail type mortise is broached, so as to obtain the width dimension of the axial dovetail type mortise meeting the requirement.
In order to realize the purpose, the invention adopts the following technical scheme:
a method for processing an axial dovetail type mortise comprises the following steps,
step one, processing an axial dovetail-shaped mortise by adopting a broaching mode;
and step two, expanding the groove width of the axial dovetail type mortise by adopting a boring mode on the basis of the processed axial dovetail type mortise.
Alternatively, in the first step, the axial dovetail-shaped mortise is located on the circumferential surface of the turbine disk.
Alternatively, the turbine disk is made of titanium alloy or powder superalloy.
Alternatively, in the second step, the bottom surface of the axial dovetail-shaped mortise is selected as a position for enlarging the width of the mortise.
Alternatively, two corners of the bottom surface of the groove are arc-shaped, and the bottom surface of the groove is higher than the arc of the switching part.
Optionally, in the second step, a numerical control five-axis machining center is adopted to enlarge the groove width of the axial dovetail-shaped mortise.
Alternatively, in the second step, an adjustable boring cutter, namely a boring cutter with a telescopically adjustable blade, is used for boring.
Alternatively, the center of the adjustable boring cutter is coincident with the center line of the section of the mortise of the axial dovetail-shaped mortise.
Alternatively, the method for processing the axial dovetail-shaped mortise further comprises the step of determining the blade extension amount and the tool nose fillet of the adjustable boring tool.
Alternatively, the method for processing the axial dovetail-shaped mortise further comprises aligning the length and the radius of the adjustable boring cutter on the cutter aligner.
In the existing processing technology, the axial dovetail-shaped mortise is usually processed in a broaching mode, and the part is difficult to be broached and supplemented again after the part is disassembled after broaching so as to enlarge the groove width.
The invention can carry out supplementary processing on the mortise on the numerical control five-axis processing center, enlarges the groove width, avoids the restriction of the part due to the groove width value, and realizes the secondary processing of the axial dovetail-shaped mortise.
Drawings
FIG. 1 is a schematic structural diagram of an adjustable boring cutter;
FIG. 2 is a schematic view of an axial dovetail type mortise element;
FIG. 3 is a schematic view of an adjustable boring tool for expanding the slot width of an axial dovetail type mortise.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
As shown in fig. 2, the turbine disc is made of titanium alloy or powdered superalloy, and the axial dovetail-shaped mortises are distributed on the circumferential surface of the turbine disc, and when the turbine disc mortises are machined, the axial dovetail-shaped mortises with fixed width are machined in a broaching mode (the axial direction is along the axial direction of the turbine disc).
The core of the invention is that: in a high-precision numerical control five-axis machining center, an adjustable boring cutter (shown in figure 1) is used for machining the bottom surface (shown in figure 2) of a mortise, and the groove width reference surface is moved downwards at two ends of the bottom surface of the mortise, so that a larger groove width value can be obtained.
Specifically, the method for machining the axial dovetail-shaped mortise comprises the following steps:
1. firstly, an axial dovetail-shaped mortise with a certain width is processed by adopting a broaching mode, as shown in figure 2;
2. two parameters of the blade extension amount and the tool nose fillet of an adjustable boring tool (the boring tool with a telescopically adjustable blade and a fixed angle) are well selected, and are shown in the attached drawing 1;
3. aligning the length (elongation) and the radius of an adjustable boring cutter on a cutter aligner;
4. clamping a part and a cutter on a five-axis machining center, aligning, and establishing an angular direction (as shown in figure 2, axial dovetail-shaped mortises are uniformly distributed on the circumference, and the established angular direction refers to determining the positions of the mortises on the circumference);
5. using a program (programming a program in a five-axis numerical control machining center according to the axial dovetail type mortise space parameters of a turbine disc) to put a part at a correct position, and referring to an attached figure 2;
6. using a program (programming a program in a five-axis numerical control machining center according to the axial dovetail type mortise space parameters of a turbine disc), swinging a cutter to a correct position, namely, enabling the center of the cutter to coincide with the center line of the section of the mortise (enabling the rotation center of a boring rod to coincide with the center line of the section of the mortise), and adjusting the cutting amount according to requirements, wherein the cutting amount is shown in a figure 3;
7. and after the condition that the tongue is not correct is confirmed, the bottom surface of the mortise is machined, and the width of the mortise is enlarged. The width of the mortise is the width of the inclined surfaces (two elliptical areas a in fig. 3) on both sides corresponding to a certain height in the opening direction (the radially outer end of the turbine disk) on the cross section of the mortise with the bottom surface of the mortise as a reference. For the mortise which is subjected to broaching forming, the inclined planes at the two sides cannot be machined after a broaching machine is arranged, the height value is increased by machining the bottom surface of the groove, so that the width of the inclined planes at the two sides is increased (compared with the state before machining, a measuring point is moved downwards after machining, and the width is increased) on the same height value by taking the bottom surface as a reference, and the inclined planes at the two sides are not directly machined.
The radius of the tool nose fillet of the adjustable boring tool is not necessarily related to the radius of the circular arc-shaped switching part at the two ends of the bottom surface of the mortise, as shown in the attached drawing 3, the bottom surface of the mortise is higher than the lowest position of the circular arc-shaped switching part, and only a few lines of the bottom surface (0.01 mm-0.09 mm) are generally removed in the processing.
Claims (10)
1. The processing method of the axial dovetail type mortise is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
step one, processing an axial dovetail-shaped mortise by adopting a broaching mode;
and step two, expanding the groove width of the axial dovetail type mortise by adopting a boring mode on the basis of the processed axial dovetail type mortise.
2. The method of claim 1, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: in the first step, the axial dovetail-shaped mortise is located on the circumferential surface of the turbine disc.
3. The method of claim 2, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: the turbine disc is made of titanium alloy or powder high-temperature alloy.
4. The method of claim 1, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: and in the second step, the bottom surface of the axial dovetail-shaped mortise is selected as a position for expanding the width of the mortise.
5. The method of claim 4, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: two corners of the bottom surface of the groove are arc-shaped, and the bottom surface of the groove is higher than the arc of the switching part.
6. The method of claim 1, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: and in the second step, the groove width of the axial dovetail-shaped mortise is enlarged by adopting a numerical control five-axis machining center.
7. The method of claim 1, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: in the second step, the boring adopts an adjustable boring cutter.
8. The method of claim 7, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: the center of the adjustable boring cutter is superposed with the center line of the section of the mortise of the axial dovetail-shaped mortise.
9. The method of claim 7, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: and determining the blade extension amount and the tool nose fillet of the adjustable boring tool.
10. The method of claim 1, wherein the step of machining the axial dovetail-shaped mortise comprises the steps of: the method also comprises the step of aligning the length and the radius of the adjustable boring cutter on the cutter aligning gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243403.5A CN113732634A (en) | 2021-10-25 | 2021-10-25 | Method for processing axial dovetail type mortise |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243403.5A CN113732634A (en) | 2021-10-25 | 2021-10-25 | Method for processing axial dovetail type mortise |
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| CN202111243403.5A Pending CN113732634A (en) | 2021-10-25 | 2021-10-25 | Method for processing axial dovetail type mortise |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954513A (en) * | 2009-07-15 | 2011-01-26 | 成都成发(集团)物资有限公司 | Broaching method of large mortise of wheel disc of large-size flue gas turbine |
| CN102896342A (en) * | 2011-07-25 | 2013-01-30 | 苏州市福迈精密机械有限公司 | Adjustable boring tool |
| CN103707016A (en) * | 2013-12-10 | 2014-04-09 | 中国南方航空工业(集团)有限公司 | Broaching machining method for mortise of powder metallurgy superalloy turbine disc |
| CN107378019A (en) * | 2017-09-13 | 2017-11-24 | 湖南南方通用航空发动机有限公司 | The mortice processing device of compressor disk |
-
2021
- 2021-10-25 CN CN202111243403.5A patent/CN113732634A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954513A (en) * | 2009-07-15 | 2011-01-26 | 成都成发(集团)物资有限公司 | Broaching method of large mortise of wheel disc of large-size flue gas turbine |
| CN102896342A (en) * | 2011-07-25 | 2013-01-30 | 苏州市福迈精密机械有限公司 | Adjustable boring tool |
| CN103707016A (en) * | 2013-12-10 | 2014-04-09 | 中国南方航空工业(集团)有限公司 | Broaching machining method for mortise of powder metallurgy superalloy turbine disc |
| CN107378019A (en) * | 2017-09-13 | 2017-11-24 | 湖南南方通用航空发动机有限公司 | The mortice processing device of compressor disk |
Non-Patent Citations (1)
| Title |
|---|
| 韩录宽: "电子束焊在航空发动机风扇盘组合件中的应用", 航空发动机, no. 2, pages 37 - 47 * |
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