CN109047870A - The fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft - Google Patents

The fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft Download PDF

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Publication number
CN109047870A
CN109047870A CN201810834974.8A CN201810834974A CN109047870A CN 109047870 A CN109047870 A CN 109047870A CN 201810834974 A CN201810834974 A CN 201810834974A CN 109047870 A CN109047870 A CN 109047870A
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CN
China
Prior art keywords
planer
processed
milling machine
main shaft
fir tree
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Granted
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CN201810834974.8A
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Chinese (zh)
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CN109047870B (en
Inventor
范海宇
舒鑫
王强
郭峰
张威
金星
白俊峰
李琳
薛吉
刘巍
梁辰
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Shenyang Turbo Machinery Co Ltd
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Shenyang Turbo Machinery Co Ltd
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Priority to CN201810834974.8A priority Critical patent/CN109047870B/en
Publication of CN109047870A publication Critical patent/CN109047870A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C3/00Milling particular work; Special milling operations; Machines therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • B23Q3/062Work-clamping means adapted for holding workpieces having a special form or being made from a special material

Abstract

The invention discloses a kind of fir tree groove processing methods of turbine spindle stream expansion machine rotor main shaft, are related to turbine spindle stream expanding machine technical field, and main purpose is to improve the machining accuracy and processing efficiency of fir tree slot.Main technical schemes of the invention are as follows: the processing method includes being fixed on main shaft to be processed on the workbench of planer-type milling machine by positioning tool clamping, wherein the positioning tool is clamped at the seal area shaft part at the main shaft both ends to be processed;The datum plane of preset quantity is processed at the central segment outer circle of the main shaft to be processed using the planer-type milling machine;Ladder platform is processed on each datum plane using the planer-type milling machine;Fir tree slot is processed in each ladder platform using the planer-type milling machine.Present invention is mainly used for the machining accuracies and processing efficiency that improve fir tree slot.

Description

The fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft
Technical field
The present invention relates to turbine spindle stream expanding machine technical fields, in particular to a kind of turbine spindle stream expansion machine rotor The fir tree groove processing method of main shaft.
Background technique
Turbine spindle stream expansion machine rotor main shaft is the core component in entire expanding machine unit, and the stability of operating is to machine Group plays the role of vital.
Wherein, axis stream expansion machine rotor main shaft includes the larger central segment for being used to assemble movable vane piece of mid diameter, at center Multiple blade root slots for being used to intert blade are provided in the peripheral surface of section, the blade root slot is because having multistage to position the fir that is otherwise known as Tree wall.In order to guarantee the assembly of movable vane piece, fir tree slot machining accuracy with higher is usually required that.Currently, mainly using horizontal Numerical-control turn-milling complex centre processes fir tree slot, mainly guarantees the precision of workpiece using the precision of complex milling machine tool itself It is required that.
However, since the structure of fir tree slot is more complicated, and processing capacity is larger, in the process of turning-milling complex processing fir tree slot In easily repeatedly vibrate, leading to the processing dimension of workpiece, there are the problems such as overproof, roughness is inadequate, so as to cause fir tree slot Machining accuracy is lower, and processing efficiency is lower.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft, Main purpose is to improve the machining accuracy and processing efficiency of fir tree slot.
In order to achieve the above objectives, present invention generally provides following technical solutions:
The embodiment of the invention provides a kind of fir tree groove processing methods of turbine spindle stream expansion machine rotor main shaft, comprising:
Main shaft to be processed is fixed on the workbench of planer-type milling machine by positioning tool clamping, wherein the positioning work It is clamped at the seal area shaft part at the main shaft both ends to be processed;
The datum plane of preset quantity is processed at the central segment outer circle of the main shaft to be processed using the planer-type milling machine;
Ladder platform is processed on each datum plane using the planer-type milling machine;
Fir tree slot is processed in each ladder platform using the planer-type milling machine.
Further, the positioning tool includes the first locating piece and the second locating piece, first locating piece and described Perforative locating slot is provided on second locating piece, it is described that main shaft to be processed is fixed on gantry mill by positioning tool clamping On the workbench of bed, comprising:
First locating piece and second locating piece are relatively installed on to the workbench of the planer-type milling machine;
The main shaft to be processed is placed in first locating piece and second locating piece, and the main shaft to be processed The seal area shaft part at both ends is successively connected in respectively in the locating slot of first locating piece and the second locating piece.
Further, the main shaft to be processed is placed in first locating piece and second locating piece described, And the seal area shaft part at the main shaft both ends to be processed is successively connected in determining for first locating piece and the second locating piece respectively After in the slot of position, the method also includes:
By measuring the position at the main shaft both ends to be processed and adjusting first locating piece and described second being cooperated to determine Installation site of the position part on the planer-type milling machine workbench, makes that the main shaft to be processed is straightened and its both ends is concentric.
Further, described to process present count at the central segment outer circle of the main shaft to be processed using the planer-type milling machine The datum plane of amount, comprising:
It rough mills to obtain the preset quantity at the central segment outer circle of the main shaft to be processed using the planer-type milling machine First datum plane;
Using each first datum plane of the planer-type milling machine finish-milling and the second datum plane is obtained, and is guaranteed each There are the machining allowance of preset thickness for second datum plane, and the surface roughness of each second datum plane is greater than Or it is equal to default roughness.
It is further, described to process ladder platform on each datum plane using the planer-type milling machine, comprising:
It is required according to the radial dimension of the fir tree slot, using the planer-type milling machine and using the first nonstandard cutter each It rough mills to obtain the first ladder platform on second datum plane;
It is required according to the radial dimension of the fir tree slot, using the planer-type milling machine and using the second nonstandard cutter each It rough mills to obtain the second ladder platform in first ladder platform.
Further, described to be required according to the radial dimension of the fir tree slot, using the planer-type milling machine and use first Nonstandard cutter is rough milled to obtain the first ladder platform on each second datum plane, comprising:
It is required according to the radial dimension of the fir tree slot, is existed using the planer-type milling machine and using first nonstandard cutter Described preset is obtained with 180 ° of symmetrical rough millings in direction according to 0 ° respectively on second datum plane of the preset quantity First ladder platform of quantity.
Further, described to be required according to the radial dimension of the fir tree slot, using the planer-type milling machine and use second Nonstandard cutter is rough milled to obtain the second ladder platform in each first ladder platform, comprising:
It is required according to the radial dimension of the fir tree slot, is existed using the planer-type milling machine and using second nonstandard cutter The present count is obtained with 180 ° of symmetrical rough millings in direction according to 0 ° respectively in first ladder platform of the preset quantity Second ladder platform of amount.
It is further, described that fir tree slot is processed in the ladder platform using the planer-type milling machine, comprising:
Using the planer-type milling machine and using palm type profile milling cutter in second ladder platform of the preset quantity Respectively according to rough milling to obtain the first fir tree slot of the preset quantity, and shape inside each first fir tree slot clockwise The unilateral machining allowance for reserving the second preset thickness of line;
Using the planer-type milling machine and using palm type profile milling cutter in the first fir tree slot of the preset quantity The second fir tree slot of the preset quantity is obtained according to clockwise direction finish-milling respectively.
Further, it is described using the planer-type milling machine and using palm type profile milling cutter the preset quantity institute Before stating in the second ladder platform according to the first fir tree slot for rough milling to obtain the preset quantity clockwise, the method is also wrapped It includes:
The flatness that each second datum plane is measured using measuring tool, when the plane of second datum plane It is using the planer-type milling machine and flat using each second benchmark of milling cutter finish-milling when degree is spent less than or equal to preset plane Face, and the surface roughness of second datum plane is greater than or equal to the default roughness after finish-milling.
By above-mentioned technical proposal, the present invention is at least had the advantages that
The fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft provided in an embodiment of the present invention, by will be to be processed Main shaft is fixed on the workbench of planer-type milling machine using positioning tool clamping, and positioning tool is clamped in main shaft both ends to be processed At seal area shaft part;Then the benchmark for preset quantity being processed at the central segment outer circle of main shaft to be processed using planer-type milling machine is flat Face;Planer-type milling machine is recycled to process ladder platform on each datum plane;Finally added in each ladder platform using planer-type milling machine Work fir tree slot, compared with prior art, processing method provided in an embodiment of the present invention shortens the Working position of main shaft to be processed The distance between clamping position, so that the clamping of main shaft to be processed is more firm, during effectively preventing processing fir tree slot It vibrates, overproof so as to avoid processing dimension, the inadequate problem of roughness improves the machining accuracy of fir tree slot.Moreover, Fir tree slot is processed using planer-type milling machine, improves processing efficiency.
Detailed description of the invention
Fig. 1 is a kind of fir tree groove processing method process of turbine spindle stream expansion machine rotor main shaft provided in an embodiment of the present invention Figure;
Fig. 2 is the fir tree groove processing method stream of another turbine spindle stream expansion machine rotor main shaft provided in an embodiment of the present invention Cheng Tu;
Fig. 3 is the structural schematic diagram that main shaft to be processed is connected with positioning tool;
Fig. 4 is the first locating piece of positioning tool or the structural schematic diagram of the second locating piece in Fig. 3;
Fig. 5 is the structural schematic diagram using planer-type milling machine machining benchmark plane on main shaft to be processed;
Fig. 6 is the structural schematic diagram for processing the first ladder platform on main shaft to be processed using planer-type milling machine;
Fig. 7 is the structural schematic diagram for processing the second ladder platform on main shaft to be processed using planer-type milling machine;
Fig. 8 is the structural schematic diagram for processing the second datum plane on machining spindle using planer-type milling machine;
Fig. 9 is the structural schematic diagram for processing the first fir tree slot on machining spindle using planer-type milling machine;
Figure 10 is the structural schematic diagram for processing the second fir tree slot on machining spindle using planer-type milling machine.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the preferred embodiment of the present invention In attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or Similar label indicates same or similar element or element with the same or similar functions.Described embodiment is this hair Bright a part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to It is used to explain the present invention, and is not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention. The embodiment of the present invention is described in detail with reference to the accompanying drawing.
In the description of the present embodiment, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute The orientation or positional relationship shown is merely for convenience of description the present embodiment and simplifies description, rather than indication or suggestion meaning Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the present embodiment The limitation of protection scope.
As stated in the background art, axis stream expansion machine rotor main shaft includes the larger center for being used to assemble movable vane piece of mid diameter Section is provided with multiple blade root slots for being used to intert blade in the peripheral surface of central segment, and the blade root slot is because having multistage positioning Be otherwise known as fir tree slot.In order to guarantee the assembly of movable vane piece, fir tree slot machining accuracy with higher is usually required that.Currently, main Fir tree slot is processed using horizontal digital-control turnning and milling complex centre, mainly guaranteed using the precision of complex milling machine tool itself The required precision of workpiece.However, since the structure of fir tree slot is more complicated, and processing capacity is larger, in turning-milling complex processing fir tree It is easily repeatedly vibrated during slot, causes the processing dimension of workpiece there are the problems such as overproof, roughness is inadequate, so as to cause The machining accuracy of fir tree slot is lower, and processing efficiency is lower.
To solve the above-mentioned problems, the embodiment of the invention provides a kind of fir tree slots of turbine spindle stream expansion machine rotor main shaft Processing method, as shown in Figure 1, and refer to Fig. 3 to Figure 10, which comprises
101, main shaft 2 to be processed is fixed on the workbench of planer-type milling machine by 1 clamping of positioning tool.
Wherein, the structure type of positioning tool 1 can there are many, as long as may be implemented 2 Set and Positioning of main shaft to be processed On the workbench of planer-type milling machine, and the position of its clamping main shaft 2 to be processed is located at the seal area shaft part at main shaft both ends, with It realizes the distance between the Working position for shortening main shaft 2 to be processed and clamping position, revolutionizes lathe top in the prior art The installation way of point and centre frame consolidates main shaft 2 to be processed more in processing, avoids generating vibration, to improve The machining accuracy of fir tree slot.
102, the benchmark of preset quantity is processed at the central segment outer circle of the main shaft 2 to be processed using the planer-type milling machine Plane.
103, ladder platform is processed on each datum plane using the planer-type milling machine.
104, fir tree slot is processed in each ladder platform using the planer-type milling machine.
Wherein, the preset quantity is the quantity of fir tree slot to be processed, by first at the center of main shaft 2 to be processed The datum plane that preset quantity is processed at section outer circle realizes to process each fir tree slot and providing the purpose of benchmark;Then exist Ladder platform is processed on each datum plane, i.e., first processes the stepped groove of similar fir tree groove shape on datum plane, then uses phase It answers cutter to process fir tree slot in ladder platform, facilitates the processing of fir tree slot.Moreover, completing the whole of fir tree slot using planer-type milling machine A process further improves the machining accuracy of fir tree slot, while also improving processing efficiency.
The fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft provided in an embodiment of the present invention, by will be to be processed Main shaft is fixed on the workbench of planer-type milling machine using positioning tool clamping, and positioning tool is clamped in main shaft both ends to be processed At seal area shaft part;Then the benchmark for preset quantity being processed at the central segment outer circle of main shaft to be processed using planer-type milling machine is flat Face;Planer-type milling machine is recycled to process ladder platform on each datum plane;Finally added in each ladder platform using planer-type milling machine Work fir tree slot, compared with prior art, processing method provided in an embodiment of the present invention shortens the Working position of main shaft to be processed The distance between clamping position, so that the clamping of main shaft to be processed is more firm, during effectively preventing processing fir tree slot It vibrates, overproof so as to avoid processing dimension, the inadequate problem of roughness improves the machining accuracy of fir tree slot.Moreover, Fir tree slot is processed using planer-type milling machine, improves processing efficiency.
Further, in order to better illustrate above-mentioned turbine spindle stream expansion machine rotor main shaft fir tree slot processing, as Refinement and extension to above-described embodiment, the embodiment of the invention provides the fir trees of another turbine spindle stream expansion machine rotor main shaft The processing of slot, as shown in Fig. 2, and refer to Fig. 5 to Figure 10, wherein label " 3 " represents the tool parts of planer-type milling machine, but unlimited It is specific as follows shown in this:
201, the first locating piece 11 of the positioning tool 1 and the second locating piece 12 are relatively installed on planer-type milling machine Workbench.
202, the main shaft 2 to be processed is placed in first locating piece 11 and second locating piece 12, and described The seal area shaft part at 2 both ends of main shaft to be processed is successively connected in the positioning of first locating piece 11 and the second locating piece 12 respectively In slot.
In an optional embodiment, referring to Fig. 3 and Fig. 4, positioning tool 1 above-mentioned may include 11 He of the first locating piece Second locating piece 12, and it is provided with locating slot on first locating piece 11 and the second locating piece 12, it realizes before processing, First the first locating piece 11 and the second locating piece 12 can be relatively mounted on the workbench of planer-type milling machine, it then again will be to be added One end seal area shaft part of work main shaft 2 is connected in the locating slot of the first locating piece 11, and other end seal area shaft part is connected to In the locating slot of two locating pieces 12, to realize the Set and Positioning of main shaft 2 to be processed, the processing of main shaft 2 to be processed is shortened The distance between position and clamping position generate vibration when avoiding processing, ensure that the machining accuracy of fir tree slot.Wherein, Positioning piece 11 and the structure of the second locating piece 12 can be identical or not identical, the structure of the two can there are many, as long as can be with Realize that in an optional embodiment, the structure of the two is identical, includes by the fixed main shaft 2 to be processed of locating slot Engaging lug positioned at bottom both ends is provided with bolt hole 15 on engaging lug, connect for the workbench with planer-type milling machine, top is set It is equipped with the locating slot 13, is clamped main shaft 2 to be processed for support.Specifically, the structure type of locating slot 13 also there are many, As long as the seal area shaft part that support is clamped 2 both ends of main shaft to be processed may be implemented, in an optional embodiment, locating slot 13 can be the V-shaped groove being arranged at the top of locating piece, and for the ease of processing and mitigating weight, the slot bottom of V-shaped groove passes through cambered surface 16 transition, moreover, can be sticked on the surface of locating slot in order to avoid treating the damage of the seal area morning at 2 both ends of machining spindle Brass cushion block 14, so that main shaft to be processed 2 is pressed in locating slot 13 by copper sheet.
203, first locating piece 11 and described is adjusted by measuring the position at 2 both ends of main shaft to be processed and cooperating Installation site of second locating piece 12 on the planer-type milling machine workbench, makes that the main shaft to be processed 2 is straightened and its both ends is same The heart.
It need to be by adjusting positioning after main shaft 2 to be processed is positioned by positioning tool 1 for the embodiment of the present invention Position of the tooling 1 on planer-type milling machine workbench, so that main shaft to be processed 2 is straightened and its both ends is concentric, to further protect Demonstrate,prove the machining accuracy of fir tree slot.Specifically when implementing, the position of main shaft 2 to be processed can be measured using amesdial, and constantly adjust The position of the first locating piece 11 and the second locating piece 12 on planer-type milling machine workbench is saved, until by playing table for main shaft to be processed 2 be straightened and its both ends diameter of axle it is concentric after, stop adjust.
It is adjusted for the ease of the position of the first locating piece 11 and the second locating piece 12 on planer-type milling machine workbench, it can one In the embodiment of choosing, the bolt hole 15 above-mentioned being arranged on engaging lug can be designed as to elongate in shape, and one end penetrates through The lateral surface of engaging lug, so that the first locating piece 11 or the second locating piece 12 can be opposite by the bolt hole 15 of elongate in shape Bolt is moved, and is facilitated the position of the first locating piece 11 and the second locating piece 12 on planer-type milling machine workbench and is adjusted, from And the position for facilitating main shaft 2 to be processed is adjusted.
204, it rough mills to obtain the present count at the central segment outer circle of the main shaft 2 to be processed using the planer-type milling machine First datum plane of amount.
205, using each first datum plane of the planer-type milling machine finish-milling and the second datum plane is obtained, and guaranteed Each second datum plane is there are the machining allowance of preset thickness, and the surface roughness of each second datum plane More than or equal to default roughness.
For the embodiment of the present invention, with reference to Fig. 5, rough milled on the excircle of main shaft 2 to be processed by planer-type milling machine first First datum plane of preset quantity out, then each first datum plane is carried out finely to obtain the second benchmark of preset quantity Plane provides datum level by these second datum planes for the processing of fir tree slot, moreover, in the second datum plane of finish-milling When, it is ensured that there are machining allowance for plane, so as to the processing of subsequent fir tree slot, meanwhile, the group roughness of the second datum level can be big In or equal to default roughness, which can be Ra3.2, to use the measurement such as amesdial during following process Tool measures the flatness of datum plane.
206, it is required according to the radial dimension of the fir tree slot, is existed using the planer-type milling machine and using the first nonstandard cutter It rough mills to obtain the first ladder platform on each second datum plane.
207, it is required according to the radial dimension of the fir tree slot, is existed using the planer-type milling machine and using the second nonstandard cutter It rough mills to obtain the second ladder platform in each first ladder platform.
For the embodiment of the present invention, step 206 be can specifically include: be required according to the radial dimension of the fir tree slot, benefit It is pressed respectively on second datum plane of the preset quantity with the planer-type milling machine and using first nonstandard cutter First ladder platform of the preset quantity is obtained with 180 ° of symmetrical rough millings in direction according to 0 °.Wherein, referring to Fig. 6, first Ladder platform can be the straight line type groove rough milled on the second datum level using the first nonstandard cutter, referring to Fig. 7, the second ladder Platform can be the step slot rough milled on the basis of the first ladder platform using the second nonstandard cutter, in order to subsequent use Palm type profile milling cutter obtains fir tree slot by coarse-fine milling on the basis of the step slot;Moreover, the first nonstandard cutter and Two nonstandard cutters can be identical.Meanwhile it can symmetrically rough mill and add with 180 ° of directions according to 0 ° in the second datum level of preset quantity Work obtains the first ladder platform of preset quantity, i.e., after rough milling one first ladder platform on one second datum level, rotation 180 degree selection Another first ladder platform is rough milled with symmetrical another second datum level of second datum level, then reselection and initial second benchmark After adjacent another second datum level in face rough mills another first ladder platform, 180 degree selection and another second benchmark are rotated again Symmetrical second datum level in face rough mills next first ladder platform, and so on, until all first ladder platform completion of processing, together Reason, can obtain the second of preset quantity with 180 ° of symmetrical rough millings in direction according to 0 ° in the first ladder platform of preset quantity Ladder platform, bring machining stress when reducing processing avoid main shaft 2 to be processed from generating stress and concentrate, so as to avoid to be added 2 stress of work main shaft is concentrated and generates deformation.It certainly, need to be using measuring tool such as amesdial to rotation in order to guarantee machining accuracy The second datum level of ladder platform to be processed carries out centering after turning, and then just starts to process.
208, the flatness that each second datum plane is measured using measuring tool, when second datum plane When flatness is spent less than or equal to preset plane, using the planer-type milling machine and each second benchmark of milling cutter finish-milling is used Plane, and the surface roughness of second datum plane is greater than or equal to the default roughness after finish-milling.
In embodiments of the present invention, it referring to Fig. 8, before processing fir tree slot, can be surveyed using measuring tool such as amesdial The flatness of two datum level of flow control, when its flatness be less than or equal to preset plane degree, when being specifically as follows 0.02mm, can adopt Finish-milling is carried out to the second datum level with milling cutter, and guarantee the second datum level after finish-milling it is coarse be solely greater than or equal to preset it is coarse Degree, which can be Ra3.2, to guarantee the machining accuracy of following process fir tree slot.
209, using the planer-type milling machine and using palm type profile milling cutter the preset quantity second ladder Respectively according to rough milling to obtain the first fir tree slot of the preset quantity clockwise in platform, and in each first fir tree slot The unilateral machining allowance for reserving the second preset thickness of portion's shape line.
It in embodiments of the present invention,, can be using measurement work before rough milling to obtain each first fir tree slot referring to Fig. 9 Tool such as amesdial measures the flatness of the second datum level, when flatness is less than or equal to 0.02mm, then fir tree slot is rough milled, to protect Demonstrate,prove the machining accuracy of fir tree slot.Furthermore, it is possible to according to rough milling to obtain the first fir tree slot of preset quantity clockwise one by one, The unilateral machining allowance for reserving preset thickness of shape line inside the first fir tree slot rough milled, so that subsequent finish-milling obtains fir tree Slot, specifically, the thickness of machining allowance can be 0.5mm.
210, using the planer-type milling machine and using palm type profile milling cutter the preset quantity first fir tree The second fir tree slot of the preset quantity is obtained according to clockwise direction finish-milling respectively in slot.
It in embodiments of the present invention,, can be using measurement work before finish-milling obtains each second fir tree slot referring to Figure 10 Tool such as amesdial measures the flatness of the second datum level again, when flatness is less than or equal to 0.02mm, then finish-milling fir tree slot, To guarantee the machining accuracy of fir tree slot.Furthermore, it is possible to according to finish-milling obtains the second fir tree slot one by one clockwise, and guarantee the Roughness inside two fir tree slots reaches Ra3.2 or more, which is the fir tree slot that required processing obtains, to protect The machining accuracy of fir tree slot is demonstrate,proved.
Above each embodiment can be realized using the X-axis of CNC planer type milling machine, Y-axis and Z axis three-shaft linkage, be improved The machining accuracy of fir tree slot, while the processing efficiency of fir tree slot is also improved, also reduce the labor intensity of operator.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features; And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and Range.

Claims (9)

1. a kind of fir tree groove processing method of turbine spindle stream expansion machine rotor main shaft characterized by comprising
Main shaft to be processed is fixed on the workbench of planer-type milling machine by positioning tool clamping, wherein the positioning tool dress It is sandwiched at the seal area shaft part at the main shaft both ends to be processed;
The datum plane of preset quantity is processed at the central segment outer circle of the main shaft to be processed using the planer-type milling machine;
Ladder platform is processed on each datum plane using the planer-type milling machine;
Fir tree slot is processed in each ladder platform using the planer-type milling machine.
2. processing method according to claim 1, which is characterized in that the positioning tool includes the first locating piece and second Perforative locating slot is provided on locating piece, first locating piece and second locating piece, it is described by main shaft to be processed It is fixed on the workbench of planer-type milling machine by positioning tool clamping, comprising:
First locating piece and second locating piece are relatively installed on to the workbench of the planer-type milling machine;
The main shaft to be processed is placed in first locating piece and second locating piece, and the main shaft both ends to be processed Seal area shaft part be successively connected in respectively in the locating slot of first locating piece and the second locating piece.
3. processing method according to claim 2, which is characterized in that it is described the main shaft to be processed is placed in it is described First locating piece and second locating piece, and the seal area shaft part at the main shaft both ends to be processed be successively connected in respectively it is described After in the locating slot of first locating piece and the second locating piece, the method also includes:
First locating piece and second locating piece are adjusted by measuring the position at the main shaft both ends to be processed and cooperating Installation site on the planer-type milling machine workbench, makes that the main shaft to be processed is straightened and its both ends is concentric.
4. processing method according to claim 1, which is characterized in that described to utilize the planer-type milling machine described to be processed The datum plane of preset quantity is processed at the central segment outer circle of main shaft, comprising:
It rough mills to obtain the first of the preset quantity at the central segment outer circle of the main shaft to be processed using the planer-type milling machine Datum plane;
Using each first datum plane of the planer-type milling machine finish-milling and the second datum plane is obtained, and is guaranteed each described There are the machining allowance of preset thickness for second datum plane, and the surface roughness of each second datum plane is greater than or waits In default roughness.
5. processing method according to claim 4, which is characterized in that described to utilize the planer-type milling machine in each base Ladder platform is processed on directrix plane, comprising:
It is required according to the radial dimension of the fir tree slot, using the planer-type milling machine and using the first nonstandard cutter each described It rough mills to obtain the first ladder platform on second datum plane;
It is required according to the radial dimension of the fir tree slot, using the planer-type milling machine and using the second nonstandard cutter each described It rough mills to obtain the second ladder platform in first ladder platform.
6. processing method according to claim 5, which is characterized in that the radial dimension according to the fir tree slot is wanted It asks, rough mills to obtain the first ladder on each second datum plane using the planer-type milling machine and using the first nonstandard cutter Platform, comprising:
It is required according to the radial dimension of the fir tree slot, using the planer-type milling machine and using first nonstandard cutter described The preset quantity is obtained with 180 ° of symmetrical rough millings in direction according to 0 ° respectively on second datum plane of preset quantity First ladder platform.
7. processing method according to claim 5, which is characterized in that the radial dimension according to the fir tree slot is wanted It asks, rough mills to obtain the second ladder in each first ladder platform using the planer-type milling machine and using the second nonstandard cutter Platform, comprising:
It is required according to the radial dimension of the fir tree slot, using the planer-type milling machine and using second nonstandard cutter described The preset quantity is obtained with 180 ° of symmetrical rough millings in direction according to 0 ° respectively in first ladder platform of preset quantity Second ladder platform.
8. processing method according to claim 5, which is characterized in that described to utilize the planer-type milling machine in the ladder platform Upper processing fir tree slot, comprising:
Distinguish in second ladder platform of the preset quantity using the planer-type milling machine and using palm type profile milling cutter According to rough milling to obtain the first fir tree slot of the preset quantity, and shape line list inside each first fir tree slot clockwise While reserving the machining allowance of the second preset thickness;
Distinguish in the first fir tree slot of the preset quantity using the planer-type milling machine and using palm type profile milling cutter The second fir tree slot of the preset quantity is obtained according to clockwise direction finish-milling.
9. processing method according to claim 8, which is characterized in that described using the planer-type milling machine and using palm Type profile milling cutter is in second ladder platform of the preset quantity according to rough milling to obtain the preset quantity clockwise The first fir tree slot before, the method also includes:
The flatness that each second datum plane is measured using measuring tool, when the flatness of second datum plane is small When preset plane is spent, using the planer-type milling machine and each second datum plane of milling cutter finish-milling is used, and The surface roughness of second datum plane is greater than or equal to the default roughness after finish-milling.
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