FR640688A - Improvements to steel fabrication processes for drills or hollow drills - Google Patents

Improvements to steel fabrication processes for drills or hollow drills

Info

Publication number
FR640688A
FR640688A FR640688DA FR640688A FR 640688 A FR640688 A FR 640688A FR 640688D A FR640688D A FR 640688DA FR 640688 A FR640688 A FR 640688A
Authority
FR
France
Prior art keywords
drills
fabrication processes
hollow
steel fabrication
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fagersta Bruks AB
Original Assignee
Fagersta Bruks AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fagersta Bruks AB filed Critical Fagersta Bruks AB
Application granted granted Critical
Publication of FR640688A publication Critical patent/FR640688A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR640688D 1926-10-09 1927-09-08 Improvements to steel fabrication processes for drills or hollow drills Expired FR640688A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE640688X 1926-10-09

Publications (1)

Publication Number Publication Date
FR640688A true FR640688A (en) 1928-07-19

Family

ID=20313779

Family Applications (1)

Application Number Title Priority Date Filing Date
FR640688D Expired FR640688A (en) 1926-10-09 1927-09-08 Improvements to steel fabrication processes for drills or hollow drills

Country Status (1)

Country Link
FR (1) FR640688A (en)

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