CN113634799A - Vertical processing technology for dovetail-shaped tenon - Google Patents
Vertical processing technology for dovetail-shaped tenon Download PDFInfo
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- CN113634799A CN113634799A CN202110962028.3A CN202110962028A CN113634799A CN 113634799 A CN113634799 A CN 113634799A CN 202110962028 A CN202110962028 A CN 202110962028A CN 113634799 A CN113634799 A CN 113634799A
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- 238000012545 processing Methods 0.000 title claims abstract description 45
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 238000003801 milling Methods 0.000 claims abstract description 74
- 238000003754 machining Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- 238000012937 correction Methods 0.000 claims description 4
- 238000009837 dry grinding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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Abstract
The invention discloses a vertical processing technology of a dovetail tenon, and belongs to the technical field of processing of blades of aero-engines. A vertical processing technology of a dovetail tenon adopts a horizontal processing center and comprises the following steps: s1: the blade blank is fixed on the side surface of the square box of the workbench in a vertical clamping mode; s2: determining the processing process sequence of the tenon, and sequentially comprising the following steps: rough milling, semi-finish milling and finish milling; s3: selecting a reasonable machining cutter and determining corresponding cutting parameters; s4: and (5) correcting and supplementing the pressure surface of the tenon. According to the invention, the tenon machining process is redesigned, so that the tenon is vertically clamped, the conventional machining sequence is changed, the tenon surface machining quality is improved, and burrs are reduced; and the horizontal machining center is used for vertically machining the spindle, so that the condition that long-term stress is uneven during the transverse machining of the original machine tool spindle is changed, and the service life of the machine tool is prolonged.
Description
Technical Field
The invention relates to the technical field of machining of aero-engine blades, in particular to a vertical machining process of a dovetail-shaped tenon.
Background
The blade is a part with complex shape, various sizes and strict tolerance requirements. The dovetail tenon is the most common tenon structure and is mainly used in the field of aero-engine compressor blades. The common tenon machining method is to adopt a forming milling cutter to perform transverse milling machining on a horizontal numerical control milling machine or adopt a forming broach to perform broaching machining on a broaching machine, and the two machining modes are both based on the profile and the angle of the forming cutter to ensure the profile and the angle of the blade tenon. The processing mode of the blade with extremely small angle tolerance of the pressure surface of the tenon can not meet the processing requirement, and the following problems are specifically existed:
(1) according to the traditional tenon machining method for ensuring the angle of the pressure surface of the tenon by means of the formed milling cutter, in the machining process, because the cutting area is large and the vibration is large, the surface of the tenon is provided with vibration ripples, and the pressure surface of the tenon has a cutter back-off phenomenon, so that the angle of the pressure surface is reduced; in addition, the cutter has angle errors in the manufacturing process, and the angle tolerance and the surface quality of parts cannot be guaranteed by combining the abrasion in the processing process;
(2) the long-term adoption of the transverse machining process causes uneven stress on the main shaft of the machine tool and influences the service life of the machine tool;
(3) the traditional numerical control tenon milling processing sequence is easy to cause too many residual burrs in the part processing process;
(4) compared with the traditional milling process, the broaching process has the advantages that the processing quality is guaranteed, but the broaching machine can only process straight lines, the cutting process is complicated, the high-efficiency integrated processing of a plurality of processes can not be completed by one-time clamping, the design and the manufacture of the broaching tool are difficult, the cost is high, and the period is long. The production requirement of the dovetail tenon developed at high speed in the current aviation industry cannot be met.
Therefore, the problem that the negative influence is more during blade tenon machining exists in the prior art.
Disclosure of Invention
The invention aims to provide a vertical processing technology of a dovetail tenon, and the vertical processing technology is used for solving the problem that the negative influence is more during the processing of the existing blade tenon.
The technical scheme for solving the technical problems is as follows:
a vertical processing technology of a dovetail tenon adopts a horizontal processing center and comprises the following steps:
s1: the blade blank is fixed on the side surface of the square box of the workbench in a vertical clamping mode;
s2: determining the processing process sequence of the tenon, and sequentially comprising the following steps: rough milling, semi-finish milling and finish milling;
s3: selecting a reasonable machining cutter and determining corresponding cutting parameters;
s4: and (5) correcting and supplementing the pressure surface of the tenon.
According to the invention, the tenon machining process is redesigned, so that the tenon is vertically clamped, the conventional machining sequence is changed, the tenon surface machining quality is improved, and burrs are reduced; and the horizontal machining center is used for vertically machining the spindle, so that the condition that long-term stress is uneven during the transverse machining of the original machine tool spindle is changed, and the service life of the machine tool is prolonged.
Further, in step S2, the specific sequence sequentially includes: roughly milling the periphery of the tenon, semi-finely milling the pressure surface of the tenon, finely milling the bottom surface groove of the tenon, finely milling the mounting angles at two ends and finely milling the pressure surface of the tenon.
According to the invention, through the process design of rough milling, semi-finish milling and finish milling on each position of the tenon, the machining precision of the key position is ensured, and the stress of the machine tool spindle is more uniform according to a specific machining sequence, so that the damage of the tenon machining process to the machine tool spindle is reduced.
Further, the feeding direction of each cutter in the machining process is vertical machining.
The vertical feed machining process is beneficial to reducing the damage of the main shaft of the machine tool in the transverse machining process.
Further, D66R6 rapid dry milling bypass cutters are adopted around the rough milling tenon, the rotating speed is 400-; the pressure surface of the semi-finish milling tenon is formed by a pressure surface milling cutter, the rotating speed is 400-; the bottom surface of the finish milling tenon adopts a D80 blade face milling cutter, the rotating speed is 400 and 600r/min, and the feeding speed is 60-100 mm/min; the bottom surface groove of the finish milling tenon adopts a rod milling cutter D10R1, the rotating speed is 700 and 900R/min, and the feeding speed is 40-80 mm/min; d20 rod milling cutters are adopted for finish milling of the installation angles at the two ends, the rotating speed is 900-; the pressure surface of the finish milling tenon adopts a pressure surface vehicle-type milling cutter, the rotating speed is 200 plus 400r/min, and the feeding speed is 60-100 mm/min.
The invention ensures the processing efficiency of the machine tool on the premise of ensuring the processing precision by determining the cutting parameters of each step of process, and is beneficial to reasonably planning the service life of the cutter.
Further, in step S4, the tenon pressure surface is corrected by the minute rotation of the B-axis rotary table.
The invention corrects the tenon pressure surface by rotating the B-axis rotary worktable, and breaks the constraint of ensuring the angle tolerance of the tenon pressure surface by a formed milling cutter in the conventional process; and the processing technology that the angle of the tenon is adjustable and controllable is realized, so that the qualification rate of the dovetail-shaped tenon is ensured.
Furthermore, the rod milling cutter D20 is adopted during the correction processing, the rotating speed is 800-1000r/min, and the feeding speed is 60-100 mm/min.
The invention defines the processing parameters for correcting the pressure surface of the tenon, is convenient to adjust the cutting parameters in a range according to different correction angles, and can ensure the processing precision and the processing efficiency.
The invention has the following beneficial effects:
(1) according to the invention, the tenon machining process is redesigned, so that the tenon is vertically clamped, the conventional machining sequence is changed, the tenon surface machining quality is improved, and burrs are reduced; and the horizontal machining center is used for vertically machining the spindle, so that the condition that long-term stress is uneven during the transverse machining of the original machine tool spindle is changed, and the service life of the machine tool is prolonged.
(2) The invention corrects the tenon pressure surface by rotating the B-axis rotary worktable, and breaks the constraint of ensuring the angle tolerance of the tenon pressure surface by a formed milling cutter in the conventional process; and the processing technology that the angle of the tenon is adjustable and controllable is realized, so that the qualification rate of the dovetail-shaped tenon is ensured.
Drawings
FIG. 1 is a schematic flow chart of a vertical processing technique of a dovetail-shaped tenon of the invention;
FIG. 2 is a schematic view of a dovetail blade configuration;
FIG. 3 is a side view of a dovetail blade;
FIG. 4 is a schematic view of the present invention in preparation for correcting the pressure surface of the tenon;
FIG. 5 is a schematic view of the present invention for modifying the pressure surface of a manufacturing tenon.
In the figure: 10-tenon; 11-leading edge mount angle; 12-trailing edge mount angle; 13-chamfering the edge; 14-tenon bottom surface; 15-a tenon bottom surface groove; 16-basin side pressure surface; 17-backside pressure face; 20-leaf body; a 30-B shaft rotary worktable; 40-a machine tool spindle; 50-D20 rod mill.
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.
Examples
Referring to fig. 1, a vertical processing technique of a dovetail tenon adopts a horizontal processing center with a B-axis rotary table 30, and comprises the following steps:
s1: and the blade blank is fixed on the side surface of the square box of the workbench in a vertical clamping mode. The blade blank in the prior art is fixed on the workbench by adopting transverse clamping, so that the machine tool can carry out transverse processing on the blade blank, the stress of the main shaft 40 of the machine tool is easily uneven after long-term use, a gap is generated between lead screws of the machine tool, the processing precision of the machine tool is influenced, and the service life of the machine tool is reduced. With the vertical setting of blade blank for the lathe also can carry out vertical processing to it, mainly by the flexible cutter completion processing that drives of lathe main shaft 40, thereby avoid lathe main shaft 40 to take place the uneven phenomenon of atress.
Referring to fig. 2 and 3, the blade includes: blade 20 that is thin-walled structure and connect the tenon 10 at blade 20 tip, include on the tenon 10: the structure comprises a tenon bottom surface 14 which is positioned on the tenon 10 and is far away from a blade body 20, a tenon bottom surface groove 15 which is arranged in the middle of the tenon bottom surface 14, an edge chamfer 13 which is arranged on the edge of the tenon bottom surface 14, a basin-side pressure surface 16 which corresponds to the basin surface of the blade body 20, a back-side pressure surface 17 which corresponds to the back surface of the blade body 20, a front edge mounting angle 11 which is arranged between the two pressure surfaces and a rear edge mounting angle 12.
Referring to fig. 1 and 2, S2: determining the processing process sequence of the tenon 10, and sequentially comprising the following steps: rough milling, semi-finish milling, according to the difference of processing position, specific order includes in proper order: roughly milling the periphery of the tenon 10, semi-finely milling the pressure surface of the tenon 10 (comprising a basin side pressure surface 16 and a lateral pressure surface 17), finely milling the bottom surface groove 15 of the tenon, finely milling the mounting angles at two ends (comprising a front edge mounting angle 11 and a rear edge mounting angle 12) and finely milling the pressure surface of the tenon 10.
S3: selecting a reasonable machining cutter and determining corresponding cutting parameters; D66R6 rapid dry milling bypass cutters are adopted around the rough milling tenon 10, the rotating speed is 400-; the pressure surface of the semi-finish milling tenon 10 adopts a pressure surface forming milling cutter, the rotating speed is 400-; the bottom surface 14 of the finish milling tenon adopts a D80 blade face milling cutter, the rotating speed is 400 and 600r/min, and the feeding speed is 60-100 mm/min; the finish milling tenon bottom surface groove 15 adopts a rod milling cutter D10R1, the rotating speed is 700-; d20 rod milling cutter 50 is adopted for finish milling of the installation angles at the two ends, the rotating speed is 900-1100r/min, and the feeding speed is 40-80 mm/min; the pressure surface of the finish milling tenon 10 adopts a pressure surface vehicle-type milling cutter, the rotating speed is 200 plus 400r/min, and the feeding speed is 60-100 mm/min. By determining the cutting parameters of each step of process, the machining efficiency of the machine tool is guaranteed on the premise of guaranteeing the machining precision, and the reasonable planning of the service life of the cutter is facilitated.
Referring to fig. 1, 4 and 5, S4: and correcting and supplementing the pressure surface of the tenon 10, wherein the blade tenon 10 is driven to rotate by the micro-rotation of the B-axis rotary worktable 30, so that the cutter is moved along the telescopic direction of the machine tool main shaft 40 to correct the pressure surface of the tenon 10. The method breaks the constraint of ensuring the angle tolerance of the pressure surface of the tenon 10 by a forming milling cutter in the conventional process; and the angle-adjustable and controllable processing technology of the tenon 10 is realized, so that the qualification rate of the dovetail-shaped tenon 10 is ensured. The rod milling cutter 50 of D20 is adopted during correction processing, the rotating speed is 800-.
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.
Claims (6)
1. A vertical processing technology of a dovetail tenon is characterized in that a horizontal processing center is adopted, and comprises the following steps:
s1: the blade blank is fixed on the side surface of the square box of the workbench in a vertical clamping mode;
s2: determining the processing process sequence of the tenon, and sequentially comprising the following steps: rough milling, semi-finish milling and finish milling;
s3: selecting a reasonable machining cutter and determining corresponding cutting parameters;
s4: and (5) correcting and supplementing the pressure surface of the tenon.
2. The dovetail-shaped tenon vertical processing technology according to claim 1, wherein in the step S2, the specific sequence sequentially comprises: roughly milling the periphery of the tenon, semi-finely milling the pressure surface of the tenon, finely milling the bottom surface groove of the tenon, finely milling the mounting angles at two ends and finely milling the pressure surface of the tenon.
3. The vertical processing technique of dovetail tenon according to claim 2, wherein the feeding direction of each tool in the processing procedure is vertical processing.
4. The vertical processing technique of dovetail tenon according to claim 2, wherein D66R6 fast dry milling bypass cutter is adopted around the rough milling tenon, the rotating speed is 400-400 mm/min, and the feeding speed is 200-400 mm/min; the pressure surface of the semi-finish milling tenon is formed by a pressure surface milling cutter, the rotating speed is 400-; the bottom surface of the finish milling tenon adopts a D80 blade face milling cutter, the rotating speed is 400 and 600r/min, and the feeding speed is 60-100 mm/min; the bottom surface groove of the finish milling tenon adopts a rod milling cutter D10R1, the rotating speed is 700 and 900R/min, and the feeding speed is 40-80 mm/min; d20 rod milling cutters are adopted for finish milling of the installation angles at the two ends, the rotating speed is 900-; the pressure surface of the finish milling tenon adopts a pressure surface vehicle-type milling cutter, the rotating speed is 200 plus 400r/min, and the feeding speed is 60-100 mm/min.
5. The vertical processing technique of dovetail-shaped tenon according to claim 1, wherein in the step S4, the pressure surface of the tenon is corrected by the micro-rotation of the B-axis rotary table.
6. The vertical processing technique of dovetail tenon according to claim 5, wherein the rod milling cutter of D20 is adopted during the correction, the rotating speed is 800-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110962028.3A CN113634799A (en) | 2021-08-20 | 2021-08-20 | Vertical processing technology for dovetail-shaped tenon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110962028.3A CN113634799A (en) | 2021-08-20 | 2021-08-20 | Vertical processing technology for dovetail-shaped tenon |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645674A (en) * | 2013-11-29 | 2014-03-19 | 华中科技大学 | A method for generating a mixed path of rough-semifine-fine milling of an integrated impeller blade |
| CN105252233A (en) * | 2015-11-19 | 2016-01-20 | 华中科技大学无锡研究院 | Machining method for aero-engine high-temperature alloy counterweight blade |
| CN206241325U (en) * | 2016-12-09 | 2017-06-13 | 无锡航亚科技股份有限公司 | A kind of blade root arc surface finishing wire rod quality |
| CN111796557A (en) * | 2019-04-03 | 2020-10-20 | 发那科株式会社 | Workpiece for evaluation, computer readable medium for recording machining program and data structure |
| CN112207334A (en) * | 2020-09-29 | 2021-01-12 | 中国航发动力股份有限公司 | Blade tenon machining method |
| CN212495589U (en) * | 2020-05-24 | 2021-02-09 | 田笑 | Horizontal milling machine |
-
2021
- 2021-08-20 CN CN202110962028.3A patent/CN113634799A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645674A (en) * | 2013-11-29 | 2014-03-19 | 华中科技大学 | A method for generating a mixed path of rough-semifine-fine milling of an integrated impeller blade |
| CN105252233A (en) * | 2015-11-19 | 2016-01-20 | 华中科技大学无锡研究院 | Machining method for aero-engine high-temperature alloy counterweight blade |
| CN206241325U (en) * | 2016-12-09 | 2017-06-13 | 无锡航亚科技股份有限公司 | A kind of blade root arc surface finishing wire rod quality |
| CN111796557A (en) * | 2019-04-03 | 2020-10-20 | 发那科株式会社 | Workpiece for evaluation, computer readable medium for recording machining program and data structure |
| CN212495589U (en) * | 2020-05-24 | 2021-02-09 | 田笑 | Horizontal milling machine |
| CN112207334A (en) * | 2020-09-29 | 2021-01-12 | 中国航发动力股份有限公司 | Blade tenon machining method |
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Application publication date: 20211112 |
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