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CN-121989643-A - Controllable broken door glass and manufacturing method thereof

CN121989643ACN 121989643 ACN121989643 ACN 121989643ACN-121989643-A

Abstract

The invention belongs to the technical field of automobile safety, and discloses controllable broken door glass and a manufacturing method thereof, wherein the interior and the surface of the glass are provided with preset areas, the preset areas are internally provided with non-penetrable stress guiding structures, the stress guiding structure is composed of micron-sized modified points or microcracks generated by laser induction and has a space arrangement mode, and the stress guiding structure induces the expansion of the cracks along the space arrangement mode under the action of collision stress. According to the invention, micron-sized modified points or microcracks with specific space arrangement modes are formed in a preset area inside the glass by means of femtosecond laser induction, so that a non-penetrating stress guiding structure is formed, the non-penetrating stress guiding structure induces the crack to expand along a preset path under collision stress, and the crack is broken into a plurality of edge-passivated large fragments, so that the escape opening is formed by rapid removal. The key of the glass manufacturing method is that laser scanning is performed firstly and tempering is performed secondly, so that the daily strength of the glass and the controllable breaking function during collision are unified.

Inventors

  • Lv Haiyong
  • ZHAO SHAOWEI

Assignees

  • 奇瑞新能源汽车股份有限公司

Dates

Publication Date
20260508
Application Date
20260114

Claims (10)

  1. 1. The controllable broken door glass is characterized in that preset areas are arranged in the glass and on the surface of the glass, and a non-penetrating stress guiding structure is arranged in the preset areas; The stress guiding structure is composed of micron-sized modified points or microcracks generated by laser induction and has a space arrangement mode; The stress guiding structure induces crack expansion along the space arrangement mode under the action of collision stress; The glass is toughened into toughened glass.
  2. 2. A controllable broken door glass according to claim 1, wherein the predetermined area comprises an edge buffer zone (1) located in the edge area of the glass and a central broken zone located in the central area of the glass.
  3. 3. A controllable broken door glass according to claim 2, wherein the central broken zone divides the glass into a plurality of main areas, including intersecting criss-cross zones (4) and annularly arranged annular broken zones (2) and escape zones (3).
  4. 4. A controllable broken door glass according to claim 3, wherein said escape zone (3) is surrounded by said endless breaking belt (2), said criss-cross belt (4) being located in an inner region of said escape zone (3).
  5. 5. A controllable broken door glass according to claim 3, wherein the central breaking zone further comprises impact sensitive points (5), said impact sensitive points (5) being distributed in the inner region of the escape zone (3) and being arranged crosswise or circumferentially to the criss-cross zone (4) in the central region of the glass.
  6. 6. A controllable cracking door glass as in claim 1, wherein the spatial arrangement pattern is at least one of a lattice, a linear array, or a grid.
  7. 7. The controllable broken door glass according to claim 1, wherein the depth of influence of the micro-scale modified spots or micro-cracks under the glass surface is set to be H, satisfying that H is 50 μm or less and 300 μm or less.
  8. 8. A method of manufacturing a controllably broken door glass according to any of claims 1-7, comprising the steps of: Providing a glass raw sheet; Scanning by using an ultrashort pulse laser in a preset area of the glass sheet to form the stress guiding structure; Tempering, namely tempering the glass after laser processing.
  9. 9. A method of manufacturing a controllably broken door glass according to claim 8, wherein in the step of laser scanning, the ultra-short pulse laser is a femtosecond laser; The laser wavelength of the femtosecond laser is set to be lambda, the lambda is more than or equal to 500nm and less than or equal to 1100nm, the pulse energy of the femtosecond laser is set to be E, and the E is more than or equal to 10 mu J and less than or equal to 50 mu J.
  10. 10. The method for manufacturing a controllably broken door glass according to claim 8, wherein in the step of scanning by laser, a distance between micro-scale modified points or micro-cracks formed by the laser scanning is set to D, and 0.3mm is less than or equal to D is less than or equal to 1.5mm.

Description

Controllable broken door glass and manufacturing method thereof Technical Field The invention belongs to the technical field of automobile safety, and particularly relates to controllable broken door glass and a manufacturing method thereof. Background In the case of car collision accidents, particularly side collision, rolling or falling into water and other emergency situations, whether the car door glass can form an effective escape passage quickly and safely is a critical factor for improving the survival probability of passengers. The traditional automobile door glass mainly adopts two technical routes of toughened glass and laminated glass, and the safety design concepts of the automobile door glass are respectively stressed, but have inherent defects. The toughened glass is wholly broken into a large number of small obtuse-angle particles when broken, so that the secondary injury risk of splashing of fragments is reduced, however, the toughened glass is extremely unfavorable in a rescue scene of fighting seconds because passengers and rescue workers need to hard clean a large number of adhered glass particles, and the laminated glass has the biggest advantages that the broken fragments are adhered by an adhesive layer and basically do not splash to hurt people after being broken, but the toughened glass almost keeps the structural integrity in accidents, has high strength and is difficult to wholly remove, and the toughened glass is seriously hindered from rapid escape under emergency conditions by powerful breakdown by external tools (such as a window breaker). Therefore, in the prior art, a mechanical window breaking cone is usually preset in the vehicle door, energy is transmitted to the window breaking cone by means of deformation of the vehicle door structure in the event of collision, so that glass is broken, the scheme depends on the transmission of energy by the deformation of the vehicle door, response delay and uncertainty exist, the complexity and occupied space of the vehicle door structure are increased, a vehicle provided with the vehicle window glass knocking member also needs to be manually operated by an occupant in emergency to trigger a built-in firing pin to break glass, but in serious collision accidents, the occupant can not be effectively operated due to coma, injury or panic, and the active escape device is disabled. Accordingly, there is a need in the art for a new door glass technology that automatically and reliably breaks in a predetermined manner upon impact, both to control debris damage and to quickly create a sufficiently large escape opening. Disclosure of Invention In order to solve the contradiction problem between the two main core requirements of collision safety protection and emergency escape efficiency in the prior automobile door glass technology, the invention provides controllable broken automobile door glass and a manufacturing method thereof. In order to achieve the above purpose, the present invention provides the following technical solutions: Firstly, the invention provides a controllable broken door glass, wherein preset areas are arranged in the glass and on the surface of the glass, and stress guiding structures are arranged in the preset areas; The stress guiding structure is composed of micron-sized modified points or microcracks generated by laser induction and has a space arrangement mode; and under the action of collision stress, the stress guiding structure induces the crack to expand along the spatial arrangement mode. Further provided is that the predetermined area comprises an edge buffer zone located at the edge area of the glass and a middle rupture zone located at the middle area of the glass. The glass is further divided into a plurality of main areas by the middle fracture belt, the main areas comprise crossed crisscross belts, annular fracture belts and escape areas, the annular fracture belts are arranged in an annular mode, the escape areas are surrounded by the annular fracture belts, and the crisscross belts are located in the inner areas of the escape areas. The middle rupture zone is further provided with impact sensitive points which are distributed in the inner area of the escape zone and are crossed or circumferentially arranged with the crisscross zone in the middle area of the glass. The space arrangement mode is at least one of a lattice, a linear array or a grid. The depth of influence of the micro-scale modified points or micro-cracks under the surface of the glass is set to be H, and H is more than or equal to 50 microns and less than or equal to 300 microns. Secondly, the invention provides a manufacturing method of the controllable broken door glass, which specifically comprises the following steps: Providing a glass raw sheet; Scanning by using an ultrashort pulse laser in a preset area of the glass sheet to form the stress guiding structure; Tempering, namely tempering the glass after laser processing. Further provid