Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
  • F41A3/00—Breech mechanisms, e.g. locks
  • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
  • F41A3/66—Breech housings or frames; Receivers

Definitions

• the invention relates to a method for finishing a locking surface already having the final shape on a self-loading handgun, in particular that locking surface which is formed by the front (rearward-facing) transverse surface of the ejection window of the slide of a self-loading pistol; in addition also a sealing surface produced by such a method.
• Positional designations that refer to the handgun and its parts always relate to the normal firing of the weapon with a horizontal firing direction towards the front.
• the above-mentioned transverse surface of the ejection window of a self-loading pistol is accordingly a largely flat, vertical surface which extends approximately perpendicular to the horizontal direction of the shot.
• the barrel of ordnance weapons is usually a wearing part.
• the slide could also be hardened in the area of its ejection window front surface, that is to say its locking surface, and then possibly ground.
• its rust protection coating is affected in any case. The sled will only be blackened after it has hardened, otherwise the weapon would have an exposed, irregular, bare stain on its top, which would not only be unsightly, but also prone to rust.
• the invention aims to remedy the above problems quickly and inexpensively.
• This laser beam can be set with very little energy; however, due to its high concentration, it leads to local overheating in a narrow area.
• the laser beam thus generates a high temperature at its point of impact, which is sufficient for hardening, but drops very quickly outside this point.
• the material surrounding the point of impact dissipates the heat quickly; and so quickly that quenching is not required.
• the locking surface is not warped.
• Laser curing in weapon technology has already become known from DE 199 18 794 AI (RHEINMETALL).
• RHEINMETALL it is a matter of hardening a layer of the inner surface of this tube which is coaxial with the axis of a weapon barrel, with the aid of a rotating mirror inserted into the barrel.
• the layer hardened in this way is subsequently coated with a hard metal layer and is therefore invisible.
• Delay is not to be expected because the surface to be hardened is axially symmetrical.
• a similarity to the problem of the invention cannot be determined.
• the laser beam can be directed directly onto the locking surface to be hardened. If the laser beam only scans a line running within the locking surface, the hardening produced thereby rapidly decreases on both sides of this line. On the other hand, if he touches the entire locking surface to be hardened, it can overheat and cool too slowly. The result would be an undefined crystal mixture in the material.
• the area hardened in this way can be very narrow. Despite the uneven heating, the material does not warp. Rather, the locking surface retains its shape and therefore does not require any post-processing.
• the laser beam is preferably oriented at an angle obliquely to the sealing surface (claim 2), particularly preferably at an angle of approximately 45 ° (claim 3). It is advantageous if it hits the bottom edge of the locking surface from behind and below (the slide lies horizontally as when closing; the direction of the shot points forward).
• the laser beam leaves a line-like marking on the surface of the material it hits, which is not annoying.
• this material surface is treated with rust protection, then the rust protection layer is impaired or even destroyed.
• the outer slide surface opposite this material surface can be treated with rust protection in almost any way, because the beam intensity and the discharge frequency of the laser can be adjusted so that it protects the rust-protected one
• the invention achieves its goal by a locking surface on a self-loading handgun, in particular locking surface on the front of the ejector window of the slide.
• ner self-loading pistol with a laser-hardened area by a method according to one of claims 1 to 4.
• the locking surface is preferably provided on a slide with a nitrocarburized and oxidized outer surface (claim 6).
• the hardening surface hardened according to the invention is preferably continued to the sled material by a wedge-shaped material gusset formed in the structure of the sled material.
• This has two exposed surfaces, starting from the lower edge of the locking surface, one of which extends up to approximately the upper edge of the locking surface and the other extends forward on the underside of the slide. These two surfaces are connected through the material of the slide along a structure transition area (claim 7).
• the microstructure transition area between the hardened layer and the non-hardened layer ends at the bottom or in the upper edge. In this way, the surface-treated outer surface of the weapon is protected from any changes because the named transition area does not mimic this outer surface.
• the two exposed surfaces of the hardened material roll extend approximately 1 to 1.5 mm forwards and upwards away from the lower edge of the sealing surface (claim 8).
• the width of these areas therefore never exceeds the height of the locking area and therefore never opens into the upper, blackened outer surface of the weapon.
• An average, preferred value of the thickness of the hardness layer is 0.5 mm in the weft direction and 1.0 mm perpendicular to it (in the cross-linking area)
• the slide itself consists essentially of tough high-alloy steel (claim 9), which already has the hardened strength required for it without hardening. For example, 42CrMoS4 is particularly suitable.
• the finished slide is nitrocarburized and black-oxidized as part of a heat treatment and then its locking surface is laser-hardened according to the invention.
• Fig. 1 is a side view of a partially broken carriage of a self-loading pistol
• FIG. 2 shows the enlarged detail II in FIG. 1.
• Fig. 1 shows the carriage 1 of a self-loading pistol, the shot direction pointing to the left.
• the carriage 1 consists mostly of 42 CrMoS 4 and has heat-blackened outer surfaces 3.
• Lock barrel on a barrel (not shown) when the pistol is ready to fire.
• the amount of locking the flat one is preferably equal to the thickness of the upper slide wall 9.
• the locking surface 5 closes the ejection opening 4 in the carriage 1 to the front.
• a laser of a known type is aligned so that the laser beam runs in the direction of arrow 15 towards the carriage 1 and is displaced transversely to the image plane; preferably with a feed rate of about a few 100 mm / mm.
• the average power of the laser is preferably a few 100 W
• the pulse duration is preferably a few milliseconds
• the frequency is preferably about 100-150 Hz.
• This processing leaves no traces visible from the outside. It leads to a gusset-shaped hardened area 11 in the material of the upper slide wall 9 - an area which forwards by an oblique, clearly outlined flat transition area 13, to the rear through the lower part of the locking surface 5 and downwards through a part the lower surface 7 of the upper slide wall 9 is limited.
• the slide material 4 is present in the laser-hardened gusset-shaped area 11 as a finely structured, martensitic structure.
• the invention has been described in particular in the case of a self-loading pistol, but extends to all self-loading weapons where an overloaded locking surface is to be subsequently hardened.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Heat Treatment Of Articles (AREA)
• Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
• Finishing Walls (AREA)
• Emergency Lowering Means (AREA)
• Lock And Its Accessories (AREA)
• Coating By Spraying Or Casting (AREA)
• Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
• Laser Beam Processing (AREA)
• Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7684254

Family Applications (1)

Country Status (11)

Families Citing this family (2)

Citations (5)

Family Cites Families (2)

• 2001
  • 2001-05-10 DE DE10122663A patent/DE10122663C1/de not_active Expired - Fee Related
• 2002
  • 2002-04-09 DE DE50204267T patent/DE50204267D1/de not_active Expired - Fee Related
  • 2002-04-09 KR KR10-2003-7014494A patent/KR20030094390A/ko not_active Application Discontinuation
  • 2002-04-09 EP EP02730132A patent/EP1386118B1/de not_active Expired - Lifetime
  • 2002-04-09 DK DK02730132T patent/DK1386118T3/da active
  • 2002-04-09 AT AT02730132T patent/ATE304691T1/de not_active IP Right Cessation
  • 2002-04-09 ES ES02730132T patent/ES2249577T3/es not_active Expired - Lifetime
  • 2002-04-09 CA CA002445016A patent/CA2445016A1/en not_active Abandoned
  • 2002-04-09 PT PT02730132T patent/PT1386118E/pt unknown
  • 2002-04-09 WO PCT/EP2002/003954 patent/WO2002090862A1/de active IP Right Grant
• 2003
  • 2003-11-07 ZA ZA200308688A patent/ZA200308688B/xx unknown
  • 2003-11-10 US US10/704,995 patent/US20050016639A1/en not_active Abandoned

Patent Citations (5)

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