US4475319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for machining a worm-type workpiece with a worm-type tool
Assignee: Reishauer AG
•
Filing: 1981-11-13
•
Granted: 1984-10-09
•
Expires: 2001-11-13
Abstract
Abstract A process for dressing a single or multiple-grooved worm or threaded workpiece by a single or multiple-grooved worm or threaded dressing tool includes the turning of the workpiece and tool with the dressing tool in a comb-type contact with the workpiece. By using an additional axial relative movement between the dressing tool and the workpiece, determined by the radial positioning and return movements, the contact points are displaced such that the desired grinding profile is produced on the workpiece. Since the entire surface area of the instantaneous contact points is significantly smaller than the entire profile area of the workpiece, the cutting forces which occur are relatively small, so that high dressing speeds can be obtained. It is also possible to make various flank corrections on the workpiece. The apparatus for carrying out the process is also disclosed.
Inventors
- 👤 Walter Wirz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:27
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/12; B23F23/1225; B24; B24B; B24B53/00; B24B53/06; B24B53/08; B24B53/083; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/10159; Y10T409/101749; Y10T409/30; Y10T409/300056; Y10T409/300112
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
226 words
A process for machining a threaded-type workpiece with a threaded-type tool wherein said workpiece has a thread profile with a cylindrical head area, profile flanks and a cylindrical profile surface between opposed flanks having a given width and said tool has a thread profile with a profile head having a width less than the width of the cylindrical profile surface between opposed flanks on said workpiece each of said workpiece and tool having a given axial length, comprising rotating said workpiece and tool while radially moving said tool toward and away from said workpiece whereby the relationship of the rotating speeds corresponds with a basic turning speed relationship resulting from a relationship of the pitches of the workpiece and tool, moving said tool into contact with said workpiece with a combing action whereby the number of contact points is a function of the pitch of the workpiece and the length of the workpiece and tool, said contact points at any given time being located upon the same radius and the same sections of an axial section gear profile of said workpiece, and additionally moving said tool axially relative to said workpiece, which movement is based on the adial movements of the tool as well as various profile corrections, so as to displace said contact points such that the desired threaded profile is produced upon the workpiece.
Claim 2
Dependent Claim
226 words
A process for machining a threaded-type workpiece with a threaded-type tool wherein said workpiece has a thread profile with a cylindrical head area, profile flanks and a cylindrical profile surface between opposed flanks having a given width and said tool has a thread profile with a profile head having a width less than the width of the cylindrical profile surface between opposed flanks on said workpiece each of said workpiece and tool having a given axial length, comprising rotating said workpiece and tool while radially moving said tool toward and away from said workpiece whereby the relationship of the rotating speeds corresponds with a basic turning speed relationship resulting from a relationship of the pitches of the workpiece and tool, moving said tool into contact with said workpiece with a combing action whereby the number of contact points is a function of the pitch of the workpiece and the length of the workpiece and tool, said contact points at any given time being located upon the same radius and the same sections of an axial section gear profile of said workpiece, and additionally moving said tool axially relative to said workpiece, which movement is based on the adial movements of the tool as well as various profile corrections, so as to displace said contact points such that the desired threaded profile is produced upon the workpiece.
Claim 3
Dependent Claim
57 words
A process as set forth in claim 1, wherein said additional axial relative movement is generated by an additional rotational movement of the tool with respect to the workpiece, whereby this additional rotational movement is superimposed upon the rotational movement of the tool which results from the basic rotational speed relationship between the workpiece and the tool.
Claim 4
Dependent Claim
25 words
A process as set forth in claim 1, wherein said additional axial relative movement is generated by a displacement of the tool in axial direction.
Claim 5
Dependent Claim
29 words
A process as set forth in claim 1, wherein each profile section of the workpiece corresponds to a specific amount of radial positioning and returning movement of said tool.
Claim 6
Dependent Claim
33 words
A process as set forth in claim 1, wherein harmonizing of the additional movement with the radial positioning and returning movements is done by means of a copying device with an interchangeable template.
Claim 7
Dependent Claim
30 words
A process as set forth in claim 1, wherein harmonizing of the additional movement with the radial positioning and returning movements is done by means of an electronic control device.
Claim 8
Dependent Claim
20 words
A process as set forth in claim 5, wherein the control templates are corrected, for generation of desired profile corrections.
Claim 9
Dependent Claim
24 words
A process as set forth in claim 6, wherein corresponding data is supplied to said electronic control device, for generation of desired profile corrections.
Claim 10
Dependent Claim
35 words
A process as set forth in claim 1, wherein the tool and workpiece are rotated in opposite directions when they have the same pitch and in the same direction when they have a different pitch.
Claim 11
Dependent Claim
63 words
A process as set forth in claim 1, wherein for trapezoid-shaped profiles of the profile head of the tool, the tool is moved in a path along the cylindrical head area of the workpiece profile then along the profile flank and the cylindrical profile surface, and then along the opposite profile flank and again to the head area of a neighboring workpiece profile.
References Cited (Backward Citations)
DE748587C
Cited
US2663292A
Cited
US2830571A
Cited
US3023546A
Cited
US2981038A
Cited
US3568373A
Cited
US3561171A
Cited
US3905156A
Cited
US4218850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |