USRE1916E - Improvement in dies for carriage-bolts - Google Patents
Improvement in dies for carriage-bolts Download PDFInfo
- Publication number
- USRE1916E USRE1916E US RE1916 E USRE1916 E US RE1916E
- Authority
- US
- United States
- Prior art keywords
- dies
- angular
- bolts
- bolt
- improvement
- Prior art date
Links
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 241001137251 Corvidae Species 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Images
Definitions
- this part of my invention consists in the use of metallic dies for the purpose of giving an angular shape to a portion of a cylindrical bolt by compression laterally, leaving the remaining portion of the bolt in its original round form, and. which dies at the saine time serve the purpose of an anvil upon which the head of the bolt is formed by upsetting a projecting portion thereof.
- a A dies
- Each die A blank (which has been previously hea-ted toa proper degree) that part of the blank lying Within the angular portion of the groove will be swaged out and forced to take the angular form corresponding to that of the angular portion of the groove, and the part lying Within the cylindrical portion of the groove will retain its original shape.
- the dies thus holding and containing the partially-Wrought boltblank form an anvil upon which a portion of the blank projecting from the dies, and at the end thereof which contains the angular groove, is upset and formed into a head by any proper machinery that Will drive said projecting portion of the blank toward the body or shank of Athe bolt and give it the desired shape or form.
- the square or angular grooves in the dies are of such length as will give the required square or angular form to the bolt, and thence merging into the semicylindrical form of the grooves in the dies, which are made to conform to the size of the rod to be used in them.
- B represents a bolt made in the dies, and after the herein-described manner of procedure. Its round and its square or angular portions are of similar sectional areas but the diameter of the round portion is greater than the distance from face to face on the square portion, as shown by the round and square or angular openings in the dies, while the distance from corner to corner, diagonally, of the square portion of the bolt is greater than the diameter of the round portion, so that the sectional areas of the two portions may be same,
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