FIELD: manufacturing processes in machine engineering, namely methods for forming outer threads by plastic deforming, namely knurling by means of self-opening thread-knurling head.
SUBSTANCE: method comprises steps of imparting rotation to part and imparting reciprocation lengthwise feed motion to tool; using as tool self-opening head having body and stem. Body of head may freely rotate in stem and it has in inner surface of its opening portion with left-hand thread and portion with right-hand thread. Disc is arranged on each of said portions. Discs having cone surface and radial grooves are movably joined with stem and one with other by means of pins. Tool-head includes at least three thread-knurling rollers that may perform radial motion. Said rollers are mounted on axles in needle type bearing assemblies and fastened by means of nut through rings having cone outer surfaces engaged with said cone inner cone surfaces of discs. Tool-head is provided with thrust bearing assemblies arranged at end sides of rollers. Axles are arranged in radial grooves of discs and they are subjected to action of springy rings resting upon pins.
EFFECT: possibility for knurling high-quality threads in wide range of diameters and pitches, enhanced efficiency of lowered-cost process.
4 cl, 5 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SELF-OPENING THREAD-KNURLING HEAD | 2004 |
|
RU2253533C1 |
| THREAD MILLING PROCESS WITH USE OF KNURLING | 2004 |
|
RU2252099C1 |
| HEAD FOR MILLING AND KNURLING OUTER THREADS | 2004 |
|
RU2268117C1 |
| HEAD FOR KNURLING INTERNAL THREADS WITH USE OF RADIAL FEED OF THREAD KNURLING ROLLERS | 2004 |
|
RU2252844C1 |
| INTERNAL THREAD KNURLING METHOD | 2004 |
|
RU2252845C1 |
| THREAD KNURLING HEAD | 2002 |
|
RU2214883C2 |
| UNIVERSAL THREAD ROLLING ROLL | 0 |
|
SU795676A1 |
| 0 |
|
SU426734A1 | |
| THREAD-ROLLING HEAD | 0 |
|
SU1538974A1 |
| APPARATUS FOR KNURLING LARGE-SIZE OUTER THREADS | 2004 |
|
RU2253535C1 |
