US4031809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of machining curvilinear surfaces
Assignee: Individual
•
Filing: 1975-10-10
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Granted: 1977-06-28
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Expires: 1995-10-10
Abstract
Abstract Workpieces of the type of turbine blades are machined with a rotating mill while rotating a blank about its axis X with relative displacements of the blank and mill along the axes X, Y and Z. The mill is positioned relative to the workpiece in such a manner that its rotational axis forms, with a line normal to each profiled point of the workpiece, an angle which is substantially smaller than a right angle, whereby the mill shapes curvilinear surfaces of the workpiece with the end portion thereof. The method according to the invention permits machining of the working profile of a workpiece of the type of turbine blades, conjugation surfaces of the profile smoothly mating the working profile and the adjacent elements of the blade and these elements proper with one and the same mill with a single positioning of the blank. The tool may comprise mills adapted for operation with the end face thereof, in particular, plane end face mills.
Inventors
- 👤 Evgenia Isaevna Shraiman
- 👤 Isai Beniaminovich Shraiman
- 👤 Eduard Iosifovich Tsesevich
- 👤 Viktor Leonidovich Dobroslavsky
- 👤 Nikolai Ivanovich Ivanov
- 👤 Pavel Pavlovich Lebedev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
B; B23; B23C; B23C3/00; B23C3/16; B23C3/18; B23C2215/00; B23C2215/44; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/30112; Y10T409/303752; Y10T409/303808
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
174 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill.
Claim 2
Independent Claim
174 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill.
Claim 3
Independent Claim
209 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; said relative displacement of the blank and mill including the step of turning said blank and mill about an axis located substantially at a right angle to the rotational axes of the blank and mill.
Claim 4
Independent Claim
209 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; said relative displacement of the blank and mill including the step of turning said blank and mill about an axis located substantially at a right angle to the rotational axes of the blank and mill.
Claim 5
Dependent Claim
60 words
A method according to claim 2, wherein relative displacement of the blank and mill is applied at convex portions of a workpiece by displacing blank and mill relative to each other in a tangent plane to the workpiece at each profiled point of said portion in the direction of the resultant of the relative motions of said blank and mill.
Claim 6
Dependent Claim
24 words
A method according to claim 2, including the step of imparting a relative alternating motion to the blank and mill along the blank axis.
Claim 7
Dependent Claim
57 words
A method according to claim 2, wherein conjugation surfaces at concave portion of a workpiece mating with the profile thereof are formed by relative displacement of the blank and mill in performing a successive profiling of points of said surfaces beginning from the intermediate part of a respective concave portion of the workpiece towards the edges thereof.
Claim 8
Independent Claim
228 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; said relative displacement of the blank and mill being applied at convex portions of a workpiece by displacing blank and mill relative to each other in a tangent plane to the workpiece at each profiled point of said portion in the direction of the resultant of the relative motions of said blank and mill.
Claim 9
Independent Claim
228 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; said relative displacement of the blank and mill being applied at convex portions of a workpiece by displacing blank and mill relative to each other in a tangent plane to the workpiece at each profiled point of said portion in the direction of the resultant of the relative motions of said blank and mill.
Claim 10
Dependent Claim
24 words
A method according to claim 5, including the step of imparting a relative alternating motion to the blank and mill along the blank axis.
Claim 11
Independent Claim
224 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; conjugation surfaces at concave portions of a workpiece mating with the profile thereof being formed by relative displacement of the blank and mill in performing a successive profiling of points of said surfaces beginning from the intermediate part of a respective concave portion of the workpiece towards the edges thereof.
Claim 12
Independent Claim
224 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the mill axis and a line normal to each profiled point of the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; conjugation surfaces at concave portions of a workpiece mating with the profile thereof being formed by relative displacement of the blank and mill in performing a successive profiling of points of said surfaces beginning from the intermediate part of a respective concave portion of the workpiece towards the edges thereof.
Claim 13
Independent Claim
176 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; imparting a relative alternating motion to the blank and mill along the blank axis.
Claim 14
Independent Claim
176 words
A method for machining curvilinear surfaces of workpieces of the type of turbine blades by circular milling comprising: rotating a blank and mill and applying thereto a profile generation displacement with respect to the rotational axis of the blank imparting to the blank and mill a relative displacement along the rotational axis of the blank and the profile generation displacement during rotation of the blank and mill, the direction of said profile generation displacement being at an angle from substantially 45° to 135° with respect to the rotational axis of the blank, said relative displacement being imparted at an angle substantially smaller than a right angle with respect to the rotational axis of the blank and to the direction of said profile generation displacement; positioning the mill relative to the surface being machined so that an angle between the surface is substantially smaller than a right angle; and shaping the curvilinear surface of said blank with the end face of the mill; imparting a relative alternating motion to the blank and mill along the blank axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |