Smilled spline apparatus and smilling process for manufacturing the smilled spline apparatus
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B23F-001/06
F16D-001/10
B23C-003/30
B23C-005/10
B23F-001/04
B23F-017/00
B23P-015/14
B23F-005/20
B23F-021/12
B23F-019/10
출원번호
US-0087857
(2013-11-22)
등록번호
US-9856920
(2018-01-02)
발명자
/ 주소
Phebus, Dan E.
Hayward, William H.
출원인 / 주소
FAIRFIELD MANUFACTURING COMPANY, INC.
대리인 / 주소
Woodling, Krost and Rust
인용정보
피인용 횟수 :
3인용 특허 :
30
초록▼
By combining shaping and milling actions, or smilling, the cutting tool can move through the entire usable portion of the spline and machine a tool relief into the face of the adjacent feature such as a shoulder before retracting, reversing direction, and repeating the cycle. The smilling apparatus
By combining shaping and milling actions, or smilling, the cutting tool can move through the entire usable portion of the spline and machine a tool relief into the face of the adjacent feature such as a shoulder before retracting, reversing direction, and repeating the cycle. The smilling apparatus and manufacturing method eliminates the need for an annular spline relief and the full length of spline engagement can be utilized for strength. The effective width of the spline connection apparatus manufactured by the smilling process conserves space and increases the load carrying capability of the spline connection.
대표청구항▼
1. A process for manufacturing an external spline, comprising the steps of: determining the load to be carried by said external spline;selecting a pitch diameter of said external spline based on said determined load;selecting the number of teeth such that the circular pitch is sufficiently large and
1. A process for manufacturing an external spline, comprising the steps of: determining the load to be carried by said external spline;selecting a pitch diameter of said external spline based on said determined load;selecting the number of teeth such that the circular pitch is sufficiently large and that said teeth of said external spline are sufficiently large and capable of handling said load;determining a length of said external spline based on said determined load and said selected pitch diameter of said external splines;selecting a tool inclination angle, β;selecting a part space included angle, 2α;determining a tool cone included angle, 2τ, based on an algorithm expressed in terms of β and α;sizing the tool based on the actual external spline dimensions required;chucking a workpiece in an endmill;milling, using said tool and an endmill, a tooth space and a tooth in said workpiece; and,milling a relief in an adjacent structure of said workpiece for clearance of said tool, said milling of said relief in said adjacent structure enabling complete utilization of said tooth when said external spline engages an internal spline; and,said adjacent structure abutting said internal spline when said external spline engages said internal spline. 2. A process for manufacturing an external spline as claimed in claim 1 wherein said step of sizing the tool includes forming a cap radius at one end of the tool and establishing a tool length such that the tool cone extends long enough out of said external spline. 3. A process for manufacturing an external spline as claimed in claim 1, wherein said inclination angle, β, is preferably in the range of 30-60°. 4. A process for manufacturing an external spline as claimed in claim 1, wherein said part space included angle, 2α, is preferably in the range of 40-75°. 5. A process for manufacturing an external spline as claimed in claim 1 wherein said workpiece is cylindrically shaped and said adjacent structure is a shoulder. 6. A process for manufacturing an external spline as claimed in claim 1 further comprising the step of: rotatably indexing said workpiece and enabling the milling of a plurality of equally spaced tooth spaces and teeth about the circumference of said workpiece forming circumferentially spaced external spline teeth. 7. A process for manufacturing an external spline as claimed in claim 1 wherein said tool includes two straight flutes and a cap radius. 8. A process for manufacturing an external spline as claimed in claim 1 wherein said tool includes a plurality of involute radii to produce said tooth space and involute teeth. 9. A process for manufacturing an internal spline, comprising the steps of: determining the load to be carried by said internal spline;selecting a pitch diameter of a mating external spline;determining a length of said internal spline apparatus based on said determined load and said selected pitch diameter of said external spline apparatus;selecting the number of teeth, N, such that the circular pitch of said external spline is sufficiently large and that said teeth of said external spline are capable of handling said load;selecting an external part space included angle, 2α°;determining an internal part space included angle using the formula, 2α°−((360/N)°);selecting a tool inclination angle, β;determining a tool cone included angle, 2τ, based on an algorithm expressed in terms of tool inclination angle β and said internal part space included angle, 2α°−((360/N)°);sizing the tool establishing a cap radius at the form diameter at one end of said tool and extending said tool cone long enough out of said part to form a second end of said tool;chucking a workpiece in an endmill;milling, using said tool and an endmill, a tooth space and a tooth in said workpiece;milling a relief in a counterbore of said workpiece for clearance of said tool, said milling of said relief in said counterbore enabling complete utilization of said tooth when said internal spline engages an external spline; and,said counterbore abutting said external spline when said external spline engages said internal spline. 10. A process for manufacturing an internal spline as claimed in claim 9 further comprising the step of: rotatably indexing said workpiece and enabling the milling of a plurality of equally spaced tooth spaces and teeth about the inner circumference of said workpiece forming circumferentially spaced internal spline teeth. 11. A process for manufacturing a spline in proximity to an adjacent structure, comprising the steps of: securing a workpiece, said workpiece includes an upper cylindrical portion and an adjacent structure, and said upper cylindrical portion includes an end portion and a length;orienting a rotary cutting tool at an inclination angle with respect to said upper cylindrical portion of said workpiece;rotating said rotary cutting tool;engaging said end portion of said upper cylindrical portion of said workpiece with said rotating rotary cutting tool;moving said rotating rotary cutting tool from said end portion of said upper cylindrical portion of said workpiece along said length of said upper portion removing material from said upper cylindrical portion of said workpiece forming a tooth and tooth space and moving said rotating rotary cutting tool into said adjacent structure of said workpiece forming a rotary cutting tool relief therein, said rotary cutting tool relief in said adjacent structure enabling complete utilization of said tooth when said spline mates with another spline, and said adjacent structure abutting said another spline when said spline engages said another spline; and,retracting said rotary cutting tool from said adjacent structure of said workpiece along said angle of inclination of said rotating rotary cutting tool. 12. A process for manufacturing a spline in proximity to an adjacent structure, as claimed in claim 11 further comprising the steps of: returning said rotary cutting tool to an initial position;indexing said workpiece;repeating said steps of: engaging said end portion of said upper cylindrical portion of said workpiece with said rotating rotary cutting tool; moving said rotating rotary cutting tool from said end portion of said upper cylindrical portion of said workpiece along said length of said upper portion forming another tooth and another tooth space and moving said rotating rotary cutter tool into said adjacent structure of said workpiece forming another rotary cutting tool relief therein; said another rotary cutting tool relief in said adjacent structure enabling complete utilization of said another tooth when said spline mates with said another spline, and said adjacent structure abuts said another spline when said spline engages said another spline; and,retracting said rotary cutting tool from said adjacent structure of said workpiece along said angle of inclination of said rotating rotary cutting tool. 13. A process for manufacturing a spline in proximity to an adjacent structure, as claimed in claim 11 wherein said spline is an external spline, said adjacent structure is a shoulder and said rotary cutting tool relief extends at said inclination angle into said shoulder. 14. A process for manufacturing a spline in proximity to an adjacent structure, as claimed in claim 11 wherein said spline is an external spline and wherein said rotary cutting tool is sized based on the tool cone included angle, the part space included angle, and the inclination angle of said tool. 15. A process for manufacturing a spline in proximity to an adjacent structure, comprising the steps of: securing a workpiece, said workpiece includes a counterbore therein terminating in an adjacent structure, said counterbore includes an end portion and a length;orienting a rotary cutting tool at an inclination angle with respect to said end portion of said counterbore of said workpiece;rotating said rotary cutting tool;engaging said end portion of said counterbore of said workpiece with said rotating rotary cutting tool;moving said rotating rotary cutting tool from said end portion of said counterbore of said workpiece along said length of said counterbore forming a tooth space and a tooth, and moving said rotating rotary cutting tool into said adjacent structure of said workpiece forming a rotary cutting tool relief therein; said rotary cutting tool relief relief in said adjacent structure enabling complete utilization of said tooth when said spline mates with another spline, and said adjacent structure abuts said another spline when said spline engages said another spline; and,retracting said rotary cutting tool from said adjacent structure of said workpiece along said angle of inclination of said rotating rotary cutting tool. 16. A process for manufacturing a spline in proximity to an adjacent structure, as claimed in claim 15 further comprising the steps of: returning said rotary cutting tool to an initial position;indexing said workpiece;repeating said steps of: engaging said end portion of said counterbore of said workpiece with said rotating rotary cutting tool;moving said rotating rotary cutting tool from said end portion of said counterbore of said workpiece along said length of said counterbore forming another tooth space and another tooth, and moving said rotating rotary cutting tool into said adjacent structure of said workpiece forming another rotary cutting tool relief therein; said another rotary cutting tool relief in said adjacent structure enabling complete utilization of said another tooth when said spline mates with said another spline, and said adjacent structure abuts said another spline when said spline engages said another spline; and,retracting said rotary cutting tool from said adjacent structure of said workpiece along said angle of inclination of said rotating rotary cutting tool. 17. A process for manufacturing a spline in proximity to an adjacent structure, as claimed in claim 15 wherein said spline is an internal spline, said adjacent structure is a counterbore engagement surface, and said rotary cutting tool relief extends at said inclination angle into said counterbore. 18. A process for manufacturing a spline in proximity to an adjacent structure, as claimed in claim 15 wherein: said spline is an internal spline;said rotary cutting tool is sized based on: a tool cone included angle as a function of a part space included angle and an inclination angle; and,a cap radius is formed at the form diameter establishing a first end of said tool and the tool cone extends long enough out of said spline to form a second end of said tool.
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