FIELD: plastic working of metals, possibly manufacture of bolts by cold die forging.
SUBSTANCE: process comprises steps of cutting off blank, preliminarily reducing it for forming polyhedral surface having faces whose number is equal to that of polyhedral product; performing reduction by value equal to volume of head of ready article; determining dimension of polyhedral surface according to given expression; then forming cone chamfers adjoined to polyhedral surface; reducing rod; upsetting head in the form of truncated pyramid and finally shaping head. During stage of upsetting head in the form of truncated pyramid it is possible to form flange at side of large base of pyramid. In such case flanged head is formed during final shaping.
EFFECT: enhanced strength of tool, improved quality of article.
3 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING ROD-TYPE ARTICLES WITH HEXAGONAL HEAD | 2016 |
|
RU2635495C1 |
| METHOD OF FORMING POLYHEDRAL BOLT HEADS | 0 |
|
SU1764757A1 |
| METHOD FOR MAKING PARTS WITH POLYHEDRAL CROSS SECTION | 2001 |
|
RU2200642C2 |
| METHOD TO PRODUCE BOLTS WITH FLANGES | 2008 |
|
RU2385200C1 |
| 0 |
|
SU464374A1 | |
| BOLT-UPSETTING DIE | 0 |
|
SU1488098A1 |
| NUT UPSETTING METHOD | 0 |
|
SU1750843A1 |
| METHOD OF PRESSWORKING BOLTS WITH POLYHEDRAL HEADS | 0 |
|
SU1402405A1 |
| PRODUCTION METHOD OF HEADED BOLT ALLOWING INTERNAL POLYHEDRON AND FLANGE, ON COLD-UPSETTING AUTOMATION | 2007 |
|
RU2350424C1 |
| METHOD FOR MAKING BOLTS | 2001 |
|
RU2203157C2 |
