US1209250A - Process of breaking steel bars. - Google Patents

Process of breaking steel bars. Download PDF

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Publication number
US1209250A
US1209250A US9377516A US1209250A US 1209250 A US1209250 A US 1209250A US 9377516 A US9377516 A US 9377516A US 1209250 A US1209250 A US 1209250A
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US
United States
Prior art keywords
bar
steel bars
breaking
breaking steel
blow
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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 - Lifetime
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Inventor
Pierre Victor Leon Bellanger
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Individual
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Individual
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Priority to US9377516 priority Critical patent/US1209250A/en
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Publication of US1209250A publication Critical patent/US1209250A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
    • B23K7/003—Machines, apparatus, or equipment for cutting long articles, e.g. cast stands, plates, in parts of predetermined length
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/10—Methods
    • Y10T225/12—With preliminary weakening
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/4979—Breaking through weakened portion

Definitions

  • the flame of the blow-pipe may be oxidizing, reducing or neutral. Whatever be its nature and the manner in which it acts from the chemical point of view, by its calorific action alone, it produces a slight notch in the metal, and owing to subsequent air cooling, produces in hardening steels an intense hardening effect all around the notch.
  • Soft steels and iron are similarly affected: a complete change is effected in the structure of the iron (stabilization of the iron 4; at the ordinary temperature). The result of this'hardening is to produce in the metal great brittleness localized in the region of the notch, as well as considerable molecular stresses in the interior of the bar in the plane of the notch. A slight pressure or shock exerted at this place upon the bar is therefore suflicient to break the bar in the plane of the said stresses, which is normal to the longitudinal axis of the bar, provided that the flame of the blow pipe has been directed in a suitable manner.
  • the process is not limited to the use of a blow-pipe but can be successfully carried out by employing any means adapted to produce in an iron or steel bar by local heating an around its entire periphery.
  • Figure 1 is a section through the bar after being notched by the flame of the blow-pipe.
  • Fig. 2 illustrates the bar supported, and
  • Fig. 3 is a section through the bar after being notched by the flame of the blow-pipe.
  • a designates the notches created by the flame of the blow-pipe.
  • b and 0 are two supports upon which the bar rests intermediate its ends, and d is the breaking or cutting tool which is guided against the bar at the side opposite to the notch a.
  • a process of the character described for breaking metal bars consisting in subjecting said bars to the action of a reducing flame at the point where the bar is to be broken for changing the consistency of the metal at this place, and finally subjecting the bar to the action of a breaking tool.

Description

P. V. L. BELLANGER. PROCESS OF BREAKING STEEL BARS.
APPLICATION FILED APR. 26, 194 6.
1 ,2@9,25U. Q Patented Dec. 19, 1916.
P'e rre ViCtarL.Be Nm'je v7 rnv ntoy;
MTW,
v PIERRE vrc'ron ni'ion nnnnanena, or rams, FRANCE.
rnoonss or BREAKING STEEL BARS.
Specification of Letters Patent.
Patented Dec. 119., 1916.,
Application filed. April 26, 1916. Serial No. 93,775.
To all whom it may concern:
Be it known that I, PIERRE VICTOR LiioN BELLANGER, a citizen of the Republic of France, residing at Paris, France, have invented a new and useful Process of Breaking Steel Bars, of which the following is a specification. This invention is an improvement in or modification of that described in specifica-' tion No. 85,694 of Mar. 21, 1916, which relates to a physico-mechanical process of breaking steel bars.
It has been observed that the flame of the blow-pipe may be oxidizing, reducing or neutral. Whatever be its nature and the manner in which it acts from the chemical point of view, by its calorific action alone, it produces a slight notch in the metal, and owing to subsequent air cooling, produces in hardening steels an intense hardening effect all around the notch. Soft steels and iron are similarly affected: a complete change is effected in the structure of the iron (stabilization of the iron 4; at the ordinary temperature). The result of this'hardening is to produce in the metal great brittleness localized in the region of the notch, as well as considerable molecular stresses in the interior of the bar in the plane of the notch. A slight pressure or shock exerted at this place upon the bar is therefore suflicient to break the bar in the plane of the said stresses, which is normal to the longitudinal axis of the bar, provided that the flame of the blow pipe has been directed in a suitable manner.
The process is not limited to the use of a blow-pipe but can be successfully carried out by employing any means adapted to produce in an iron or steel bar by local heating an around its entire periphery.
In the accompanying drawing: Figure 1 is a section through the bar after being notched by the flame of the blow-pipe. Fig. 2 illustrates the bar supported, and Fig. 3
shows the bar bent under the action of the breaking tool.
a designates the notches created by the flame of the blow-pipe.
b and 0 are two supports upon which the bar rests intermediate its ends, and d is the breaking or cutting tool which is guided against the bar at the side opposite to the notch a.
Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:
A process of the character described for breaking metal bars, consisting in subjecting said bars to the action of a reducing flame at the point where the bar is to be broken for changing the consistency of the metal at this place, and finally subjecting the bar to the action of a breaking tool.
, In testimony whereof I aflix my signature in presence of two witnesses.
PIERRE VICTOR Leon BELLANGER.
Witnesses:
CHAS. P. PRnssLY, C. ARMANI).
copies of? this patent may be attained for five cents each, by addressing the Commissioner or Patents,
, Washington, a. a."
US9377516 1916-04-26 1916-04-26 Process of breaking steel bars. Expired - Lifetime US1209250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US9377516 US1209250A (en) 1916-04-26 1916-04-26 Process of breaking steel bars.

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US9377516 US1209250A (en) 1916-04-26 1916-04-26 Process of breaking steel bars.

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958732A (en) * 1973-12-15 1976-05-25 Kabushiki Kaisha Toyota Chuo Kenkyusho Method for breaking steel rod into billets
US4412372A (en) * 1979-11-22 1983-11-01 Skf Kugellagerfabriken Gmbh Method of manufacturing bearing rings ruptured along an arrow-shaped partition line
US5707181A (en) * 1995-01-04 1998-01-13 Dyckerhoff & Widmann Aktiengesellschaft Method of producing an intended breaking point in a tension member for a soil anchor
US20050236455A1 (en) * 2004-04-24 2005-10-27 Man Nutzfahrzeuge Aktiengesselschaft Method for break separation of pieces that can be re-assembled or their starting materials
US20100116119A1 (en) * 2008-11-10 2010-05-13 Bayne John F Method for separating a composite glass assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958732A (en) * 1973-12-15 1976-05-25 Kabushiki Kaisha Toyota Chuo Kenkyusho Method for breaking steel rod into billets
US4412372A (en) * 1979-11-22 1983-11-01 Skf Kugellagerfabriken Gmbh Method of manufacturing bearing rings ruptured along an arrow-shaped partition line
US5707181A (en) * 1995-01-04 1998-01-13 Dyckerhoff & Widmann Aktiengesellschaft Method of producing an intended breaking point in a tension member for a soil anchor
US20050236455A1 (en) * 2004-04-24 2005-10-27 Man Nutzfahrzeuge Aktiengesselschaft Method for break separation of pieces that can be re-assembled or their starting materials
US7814632B2 (en) * 2004-04-24 2010-10-19 Man Nutzfahrzeuge Ag Method for break separation of pieces that can be re-assembled or their starting materials
US20100116119A1 (en) * 2008-11-10 2010-05-13 Bayne John F Method for separating a composite glass assembly

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